planning guide 54-80 kw
TRANSCRIPT
Planning Guide 54-80 kW
6 720 814 720-01.1I
6 72
0 81
7 05
2 (2
015/
06)
Table of Contents
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)2
Table of Contents
1 Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Dimensioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 One heat pump, electrical boiler, no DHW from heat pump . . . . . 6
5 One heat pump, electrical boiler, DHW from one coil cylinder . . . 9
6 One heat pump, electrical boiler, DHW from two coil cylinders 12
7 One heat pump, electrical boiler, DHW from fresh water station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8 Two heat pumps, electrical boiler, no DHW from heat pump . . 18
9 Two heat pumps, electrical boiler, DHW from one coil cylinder 21
10 Two heat pumps, electrical boiler, DHW from two coil cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
11 Two heat pumps, electrical boiler, DHW from four coil cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
12 Two heat pumps, electrical boiler, DHW from fresh water station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
13 One heat pump, oil or gas boiler, no DHW from heat pump . . . 33
14 One heat pump, oil or gas boiler, DHW from one coil cylinder . 36
15 One heat pump, oil or gas boiler, DHW from two coil cylinders 39
16 One heat pump, oil or gas boiler, DHW from fresh water station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
17 Two heat pumps, oil or gas boiler, no DHW from heat pump . . 46
18 Two heat pumps, oil or gas boiler, DHW from one coil cylinder 49
19 Two heat pumps, oil or gas boiler, DHW from two coil cylinders 52
20 Two heat pumps, oil or gas boiler, DHW from four coil cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
21 Two heat pumps, oil or gas boiler, DHW from fresh water station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
22 One heat pump, district heating, no DHW from heat pump . . . . 61
23 One heat pump, district heating, DHW from one coil cylinder . . 64
24 One heat pump, district heating, DHW from two coil cylinders . 67
25 One heat pump, district heating, DHW from fresh water station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
26 Two heat pumps, district heating, no DHW from heat pump . . . 74
27 Two heat pumps, district heating, DHW from two coil cylinders 77
28 Two heat pumps, district heating, DHW from four coil cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
29 Two heat pumps, district heating, DHW from fresh water station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
30 Cascade, intermediate up to 5 heat pumps . . . . . . . . . . . . . . . . 87
31 Capacity chart 54 kW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
32 Capacity chart 64 kW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
33 Capacity chart 72 kW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
34 Capacity chart 80 kW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Symbols
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 3
1 Symbols
Fig. 1
p••p
θ
Sym
bols according to ISO
/FDIS
14617This is a principal draw
ing
Vx
Shut-off valve
Non return valve, flow
direction >D
x
Adjusting valve
Vx
Vx
Control valve w
ith motor, arrow
sindicates regulating gates
Mx
Thermal valve
Gx
Thermom
eter
TxTem
perature sensor
Gx
Pressure gauge
Gx
Gx
Pressure sensor
Differential pressure sw
itch
Accum
ulator tankC
C
CW
Coil tank
Electrical boiler
EE
EM
Oil-fired boiler
Heat pum
p
Expansion vessel
Cx
Filter/Screen
Sx
Ex
Heat exchanger
Pum
pP
xVL
Air vent (autom
atical)
Sx
Filter valve
OW
Dom
estic hot vater
Inlet/ outlet
Duct (arrow
indicates flow direction)
Intersecting duct
T-branch
FxS
afety valve, outlet >
Denom
inationD
es.S
ymbol
Sym
bolD
es.D
enomination
Sym
bolD
es.D
enomination
6720817052-31.1I
Designations
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)4
2 Designations
Des. DenominationsSensorsT0 Flow temperature sensorTC2 Temperature sensor in buffer cylinderTL1 Outdoor temperature sensorTW1 DHW temperature sensorHeat pump When cascade, use Z1, Z2... as prefixTB0 Temperature sensor collector circuit inTB1 Temperature sensor collector circuit outTC0 Temperature sensor heat transfer fluid inTC1 Temperature sensor heat transfer outTC3 Temperature sensor heat transfer outPB3 Circulation pump collector circuitPC0 Circulation pump heat transfer fluidVW1 Three way valveFC1 Safety valveSC21 FilterHeating circuit When more than one heating circuit, use C1,
C2... as prefixPC1 Cirkulation pump heating circuitVC11-12 Shut-off valve PC1VC10 Three way valveVC13-14 Shut-off valvesSC11 FilterGC11- ThermometersHeating circuit primary
When cascade, use Z1, Z2... as prefix
DC21- Non return valvesVC21- Shut-off valvesCC1 Accumulator tankVA21- Draining valveCooling circuit When cascade, use Z1, Z2... as prefixFB31- Safety valveVB31-33 Filling unitVB34 Shut-off valve expansion vesselCB31 Expansion vessel deairingCB32 Expansion vesselGB31 Pressure gaugeSB31 FilterVB35 Shut-off valveDB31 Non return valveVL35 De-airing valveDHW primary When cascade, use Z1, Z2... as prefixCW1- Coil cylinder or accumulator cylinderVC41- Valves DHWVA41- Draining valveVL41- De-airing valveDHW When cascade, use Z1, Z2... as prefixFW41 Safety valveVW41- Valves DHWMW41 Thermal mixing valvePW2 Circulation pumpGW41- ThermometersDW41- Non return valves
Table 1
Additional heatEE Electrical boilerEM71 Oil or gas boilerFM71 Safety valveVL71 De-airing valveTC1 Temperature sensorVM71- Shut-off and balansing valvesVM0 Three way valveGM71- ThermometersPM1 Circulation pumpPM2 Circulation pumpDC11 Non return valveSafety circuitCC91- Expansion vesselFC91- Safety valveGC91- Pressure gaugeVL91- De-airing valveFilling unit system waterVW95- Shut-off valvesVL95- De-airing valves
Des. Denominations
Table 1
Dimensioning
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 5
3 Dimensioning
Fig. 2
Manifold cham
bers and outdoor piping1-4 m
anifold chambers w
ith maxim
um 10 boreholes/cham
berD
N 40-pipe, m
ax 25 m betw
een manifold cham
ber and borehole90 m
m P
E pipe for up to 6 boreholes betw
een manifold cham
ber and heat pump
110 mm
PE
Pipe for 7-10 boreholes betw
een manifold cham
ber and heat pump
HP
Manifold cham
ber
Max 10 boreholes,
Depth: 200 m
Manifold cham
ber
PE
Pipe 90/110 m
m
Manifold cham
ber
PE
pipe 90/110 mm
HP
HP
HP
Indoor piping
Stainless
Max flow
(l/s) with pressure drop:
Steel, 2 m
m100
150200 P
a/mD
N 40
0.70.9
1.0(0.65 m
/s)D
N 50
1.31.7
2.0(0.80 m
/s)D
N 65
2.63.3
3.8(0.93 m
/s)D
N 80
4.15.1
6.0(1.06 m
/s)D
N 100
8.210.2
12.0 (1.26 m
/s)D
N 125
14.518.1
21.1 (1.45 m
/s)V
alid for EG
30,5% och E
thanol 24,5%
CW
CC
CW
Piping for Central H
eating system
Steel pipe
Max flow
(l/s) with pressure drop:
Nom
. diameter
100150
200 Pa/m
DN
400.8
1.01.1
(0,75 m/s)
DN
501.5
1.82,1
(0,90 m/s)
DN
652.9
3.64,1
(1,06 m/s)
DN
804.4
5.46,3
(1,18 m/s)
DN
1008.8
10.812,5
(1,39 m/s)
DN
12515.3
18.821,8
(1,59 m/s)
DN
15025.0
30.835,6
(1,79 m/s)
System
for hot tap w
ater production
Central heating
system
Max 10 boreholes,
Depth: 200 m
Max 10 boreholes,
Depth: 200 m
PE
pipe 90/110 mm
One heat pump, electrical boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)6
4 One heat pump, electrical boiler, no DHW from heat pump
Fig. 3
One heat pump, electrical boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 7
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
One heat pump, electrical boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)8
3-step electric heaterOverviewAn electric heater, controlled in 3 power steps, either integrated in the heat pump or external, Is used as additional heat for both heating and potable hot water production.FunctionThe internal electric additional heat assists when the heat pump alone is unable to satisfy the heating demand. The electric additional heat can also supply hot potable water, and if necessary (DHW cylinder that stores potable water used), thermically disinfect the hot water heater on a regular basisControl of 3-step electrical heaterStep-up of the electric additional heat is performed with a degree minute calculator from the difference between actual value and set point value T0-3K. Step-down of the electric additional heat is performed with a degree minute calculator from the difference between actual value and set point value T0. The number of steps allowed for the electric additional heat can be set separately for heating and hot water.
One heat pump, electrical boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 9
5 One heat pump, electrical boiler, DHW from one coil cylinder
Fig. 4
One heat pump, electrical boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)10
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.Function
The (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
One heat pump, electrical boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 11
3-step electric heaterOverviewAn electric heater, controlled in 3 power steps, either integrated in the heat pump or external, Is used as additional heat for both heating and potable hot water production.FunctionThe internal electric additional heat assists when the heat pump alone is unable to satisfy the heating demand. The electric additional heat can also supply hot potable water, and if necessary (DHW cylinder that stores potable water used), thermically disinfect the hot water heater on a regular basisControl of 3-step electrical heaterStep-up of the electric additional heat is performed with a degree minute calculator from the difference between actual value and set point value T0-3K. Step-down of the electric additional heat is performed with a degree minute calculator from the difference between actual value and set point value T0. The number of steps allowed for the electric additional heat can be set separately for heating and hot water.
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
1x 7521)
1) Coil cylinder
1x 7541) 1x 7561)
1x G2542)
2) Heat pump size
5 15 151x G2642) 5 15 151x G2722) 5 20 201x G2802) 5 20 20
Table 2 no. of apartments
One heat pump, electrical boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)12
6 One heat pump, electrical boiler, DHW from two coil cylinders
Fig. 5
One heat pump, electrical boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 13
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.Function
The (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
One heat pump, electrical boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)14
3-step electric heaterOverviewAn electric heater, controlled in 3 power steps, either integrated in the heat pump or external, Is used as additional heat for both heating and potable hot water production.FunctionThe internal electric additional heat assists when the heat pump alone is unable to satisfy the heating demand. The electric additional heat can also supply hot potable water, and if necessary (DHW cylinder that stores potable water used), thermically disinfect the hot water heater on a regular basisControl of 3-step electrical heaterStep-up of the electric additional heat is performed with a degree minute calculator from the difference between actual value and set point value T0-3K. Step-down of the electric additional heat is performed with a degree minute calculator from the difference between actual value and set point value T0. The number of steps allowed for the electric additional heat can be set separately for heating and hot water.
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
2x 7521)
1) Coil cylinder
2x 7541) 2x 7561)
1x G2542)
2) Heat pump size
30 40 401x G2642) 30 50 501x G2722) 30 55 551x G2802) 30 60 60
Table 3 no. of apartments
One heat pump, electrical boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 15
7 One heat pump, electrical boiler, DHW from fresh water station
Fig. 6
Max
1 m
C1.TC
0θ
C1.V
C12 C
1.DC
11
C1.G
C11
C1.P
C1
C1.V
C11
VC
21
DC
23V
W2
VC
22
VW
1
CC
92FC
92V
L92
DC
22
CC
1
CW
1
VA
41
VA
21G
C11
DC
21
DC
41
VC
23VC
24
C1.V
C0
GC
41
VC
26V
C25
VW
97
θ TC2 C
C91
FC91
VL91
VW
98
SC
21θθ θ
θTC
0
PC
0
PB
3
TB0
TB1
VC
1θ
TC3
VW
96
VW
95
CB
32G
B31
FB32
VB
31V
B32
VB
33
FB31
CB
31
SB
31
VB
35
EW
1 PW
1TW
4θ
DW
42V
W43
PW
2
IW1
OW
1
VW
44V
W45
VW
41
VW
42
DC
42
VW
3
TW5
θ
VC
41
FW41
θ
q
TW3
θ
TW2
GW
1
VW
46
DW
41
DC
43
TW6
θ
TW7
θ
FWS
TL1θ
θTW
1
θ
EE
1
TC1
FC1
VC
22V
C21
SC
11
VC
13V
C14
One heat pump, electrical boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)16
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.Function
The (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
One heat pump, electrical boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 17
3-step electric heaterOverviewAn electric heater, controlled in 3 power steps, either integrated in the heat pump or external, Is used as additional heat for both heating and potable hot water production.FunctionThe internal electric additional heat assists when the heat pump alone is unable to satisfy the heating demand. The electric additional heat can also supply hot potable water, and if necessary (DHW cylinder that stores potable water used), thermically disinfect the hot water heater on a regular basisControl of 3-step electrical heaterStep-up of the electric additional heat is performed with a degree minute calculator from the difference between actual value and set point value T0-3K. Step-down of the electric additional heat is performed with a degree minute calculator from the difference between actual value and set point value T0. The number of steps allowed for the electric additional heat can be set separately for heating and hot water.
Fresh water stationOverviewThe property also requires a rather big amount of potable hot water, which is supplied by a fresh water station.FunctionThe fresh water station is heated by a buffer cylinder, that is, in turn, heated by the heat pump or the boiler.The return from the fresh water station is either sent back to the mentioned buffer, or to the heating buffer, de-pending on the return temperature.Therefore, the heating buffer must always be heated to a temperature around 40°C, also in summer. And therefore, all heating systems must be mixed.Heating buffer CW1 (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceeds the stop limit. In hot water mode the compressor starts and the 3-way valves VW1 and VW2 is put in hot water position.Fresh water stationThe fresh water station maintains the potable hot water temperature TW4 to a constant value by collecting heat from CW1 using PW1 at the needed speed. At sudden changes in potable hot water flow,The flow sensor GW1 can influence the speed of PW1 before there has been a change in TW4 temperature. The heating water return temperature from the fresh water station can either be high, when there is almost only circulation heating, then VW3 sends the water back to CW1, but when the potable hot water flow increases, the return temperature will drop, and VW3 will change to send the water to heating buffer CC1 for pre-heating.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water station and the buffer CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between TW4 and TW6/GW41 should be about 5K.
DHW dimensioning, Heat pump 54 kW
DHW dimensioning, Heat pump 64 kW
DHW dimensioning, Heat pump 72 kW
DHW dimensioning, Heat pump 80 kW
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
45 -2x CW1 750 l and 1x CC1 750 l2) 55 -2x CW1 750 l and 2x CC1 750 l2) 65 -3x CW1 750 l and 2x CC1 750 l2) 70 -3x CW1 750 l and 3x CC1 750 l2) 80 -4x CW1 750 l and 3x CC1 750 l2) 85 -4x CW1 750 l and 4x CC1 750 l2) 95 95
Table 4 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
50 -2x CW1 750 l and 1x CC1 750 l2) 60 -2x CW1 750 l and 2x CC1 750 l2) 70 -3x CW1 750 l and 2x CC1 750 l2) 80 -3x CW1 750 l and 3x CC1 750 l2) 85 -4x CW1 750 l and 3x CC1 750 l2) 95 954x CW1 750 l and 4x CC1 750 l2) 100 105
Table 5 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
60 -2x CW1 750 l and 1x CC1 750 l2) 65 -2x CW1 750 l and 2x CC1 750 l2) 75 -3x CW1 750 l and 2x CC1 750 l2) 85 -3x CW1 750 l and 3x CC1 750 l2) 95 954x CW1 750 l and 3x CC1 750 l2) 100 1004x CW1 750 l and 4x CC1 750 l2) 100 115
Table 6 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
65 -2x CW1 750 l and 1x CC1 750 l2) 75 -2x CW1 750 l and 2x CC1 750 l2) 80 -3x CW1 750 l and 2x CC1 750 l2) 90 -3x CW1 750 l and 3x CC1 750 l2) 100 1004x CW1 750 l and 3x CC1 750 l2) 100 1104x CW1 750 l and 4x CC1 750 l2) 100 120
Table 7 no. of apartments
Two heat pumps, electrical boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)18
8 Two heat pumps, electrical boiler, no DHW from heat pump
Fig. 7
Two heat pumps, electrical boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 19
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, electrical boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)20
0-10V controlled (electric) heaterOverviewThe boiler is power controlled by a 0-10V power signal, and is used for additional heatingFunctionThe additional heat EM0 assists when the heat pump alone is unable to satisfy the heating demand Control of power controlled additional heat EM0Engaging of of the additional heat EM0 is performed with a degree minute calculator from the difference be-tween actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the power control of EM0 begins which then regulates T0 to setpoint. Disengage of additional heat occurs when the control signal has reached 0 and the degree minute calculation of the difference between the T0 actual value and set point val-ue reaches the preset number of degree minutes.
Two heat pumps, electrical boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 21
9 Two heat pumps, electrical boiler, DHW from one coil cylinder
Fig. 8
Two heat pumps, electrical boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)22
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filters Z1.SB31 and Z2.SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, electrical boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 23
0-10V controlled (electric) heaterOverviewThe boiler is power controlled by a 0-10V power signal, and is used for additional heatingFunctionThe additional heat EM0 assists when the heat pump alone is unable to satisfy the heating demand Control of power controlled additional heat EM0Engaging of of the additional heat EM0 is performed with a degree minute calculator from the difference be-tween actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the power control of EM0 begins which then regulates T0 to setpoint. Disengage of additional heat occurs when the control signal has reached 0 and the degree minute calculation of the difference between the T0 actual value and set point val-ue reaches the preset number of degree minutes.
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
1x 7521)
1) Coil cylinder
1x 7541) 1x 7561)
1x G2542)
2) Heat pump size
5 15 151x G2642) 5 15 151x G2722) 5 20 201x G2802) 5 20 20
Table 8 no. of apartments
Two heat pumps, electrical boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)24
10 Two heat pumps, electrical boiler, DHW from two coil cylinders
Fig. 9
Two heat pumps, electrical boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 25
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filters Z1.SB31 and Z2.SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, electrical boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)26
0-10V controlled (electric) heaterOverviewThe boiler is power controlled by a 0-10V power signal, and is used for additional heatingFunctionThe additional heat EM0 assists when the heat pump alone is unable to satisfy the heating demand Control of power controlled additional heat EM0Engaging of of the additional heat EM0 is performed with a degree minute calculator from the difference be-tween actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the power control of EM0 begins which then regulates T0 to setpoint. Disengage of additional heat occurs when the control signal has reached 0 and the degree minute calculation of the difference between the T0 actual value and set point val-ue reaches the preset number of degree minutes.
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
2x 7521)
1) Coil cylinder
2x 7541) 2x 7561)
2x G2542)
2) Heat pump size
30 40 401x G254 + 1x G2642) 30 45 451x G254 + 1x G2722) 30 50 502x G2642) 30 50 501x G254 + 1x G2802) 30 50 501x G264 + 1x G2722) 30 55 552x G2722) 30 55 551x G264 + 1x G2802) 30 55 551x G272 + 1x G2802) 30 60 602x G2802) 30 60 60
Table 9 no. of apartments
Two heat pumps, electrical boiler, DHW from four coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 27
11 Two heat pumps, electrical boiler, DHW from four coil cylinders
Fig. 10
Two heat pumps, electrical boiler, DHW from four coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)28
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filters Z1.SB31 and Z2.SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, electrical boiler, DHW from four coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 29
0-10V controlled (electric) heaterOverviewThe boiler is power controlled by a 0-10V power signal, and is used for additional heatingFunctionThe additional heat EM0 assists when the heat pump alone is unable to satisfy the heating demand Control of power controlled additional heat EM0Engaging of of the additional heat EM0 is performed with a degree minute calculator from the difference be-tween actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the power control of EM0 begins which then regulates T0 to setpoint. Disengage of additional heat occurs when the control signal has reached 0 and the degree minute calculation of the difference between the T0 actual value and set point val-ue reaches the preset number of degree minutes.
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
2x 7521)
1) Coil cylinder
2x 7541) 2x 7561)
2x G2542)
2) Heat pump size
80 80 801x G254 + 1x G2642) 105 105 1051x G254 + 1x G2722) 115 115 1152x G2642) 115 115 1151x G254 + 1x G2802) 120 120 1201x G264 + 1x G2722) 120 120 1202x G2722) 120 130 1301x G264 + 1x G2802) 120 130 1301x G272 + 1x G2802) 120 135 1352x G2802) 120 145 145
Table 10 no. of apartments
Two heat pumps, electrical boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)30
12 Two heat pumps, electrical boiler, DHW from fresh water station
Fig. 11
Two heat pumps, electrical boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 31
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filters Z1.SB31 and Z2.SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, electrical boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)32
0-10V controlled (electric) heaterOverviewThe boiler is power controlled by a 0-10V power signal, and is used for additional heatingFunctionThe additional heat EM0 assists when the heat pump alone is unable to satisfy the heating demand Control of power controlled additional heat EM0Engaging of of the additional heat EM0 is performed with a degree minute calculator from the difference be-tween actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the power control of EM0 begins which then regulates T0 to setpoint. Disengage of additional heat occurs when the control signal has reached 0 and the degree minute calculation of the difference between the T0 actual value and set point val-ue reaches the preset number of degree minutes.
Fresh water stationOverviewThe property also requires a rather big amount of potable hot water, which is supplied by a fresh water station.FunctionThe fresh water station is heated by buffer cylinders, that is, in turn, heated by the heat pumps or the boiler.The return from the fresh water station is either sent back to the after heating buffer Z2.CW1, or to the pre-heating buffer Z1.CW1, de-pending on the return temperature.Heating buffer CW1 (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceeds the stop limit. In hot water mode the compressor starts and the 3-way valves VW1 and VW2 is put in hot water position.Fresh water stationThe fresh water station maintains the potable hot water temperature TW4 to a constant value by collecting heat from CW1 using PW1 at the needed speed. At sudden changes in potable hot water flow,The flow sensor GW1 can influ nce the speed of PW1 before there has been a change in TW4 temperature. The heating water return temperature from the fresh water station can either be high, when there is almost only circulation heating, then VW3 sends the water back to CW1, but when the potable hot water flow increases, the return temperature will drop, and VW3 will change to send the water to heating buffer CC1 for pre-heating.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water station and the buffer CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between TW4 and TW6/GW41 should be about 5K.
DHW dimensioning, Heat pumps 2x 54 kW
DHW dimensioning, Heat pumps 2x 64 kW
DHW dimensioning, Heat pumps 2x 72 kW
DHW dimensioning, Heat pumps 2x 80 kW
FWS 1001) FWS 2001)
1x CW1 750 l and 1x CC1 750 l2) 85 -2x CW1 750 l and 1x CC1 750 l2) 95 952x CW1 750 l and 2x CC1 750 l2) 100 1053x CW1 750 l and 2x CC1 750 l2) 100 1153x CW1 750 l and 3x CC1 750 l2) 100 1204x CW1 750 l and 3x CC1 750 l2) 100 1304x CW1 750 l and 4x CC1 750 l2) 100 145
Table 11 no. of apartments
1) Fresh water station2) No. of cylinders
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
100 1002x CW1 750 l and 1x CC1 750 l2) 100 1102x CW1 750 l and 2x CC1 750 l2) 100 1203x CW1 750 l and 2x CC1 750 l2) 100 1303x CW1 750 l and 3x CC1 750 l2) 100 1404x CW1 750 l and 3x CC1 750 l2) 100 1504x CW1 750 l and 4x CC1 750 l2) 100 165
Table 12 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
100 1152x CW1 750 l and 1x CC1 750 l2) 100 1252x CW1 750 l and 2x CC1 750 l2) 100 1353x CW1 750 l and 2x CC1 750 l2) 100 1453x CW1 750 l and 3x CC1 750 l2) 100 1604x CW1 750 l and 3x CC1 750 l2) 100 1704x CW1 750 l and 4x CC1 750 l2) 100 185
Table 13 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
100 1302x CW1 750 l and 1x CC1 750 l2) 100 1402x CW1 750 l and 2x CC1 750 l2) 100 1503x CW1 750 l and 2x CC1 750 l2) 100 1603x CW1 750 l and 3x CC1 750 l2) 100 1754x CW1 750 l and 3x CC1 750 l2) 100 1904x CW1 750 l and 4x CC1 750 l2) 100 205
Table 14 no. of apartments
One heat pump, oil or gas boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 33
13 One heat pump, oil or gas boiler, no DHW from heat pump
Fig. 12
VC21
CC
91FC
91
θ TL1
CC
1
SC21
VL91
VA21
GC
91C
2.VC10
C2.T0θ
C2.VC
12
C2.D
C11
C2.G
C11
C1.PC
1
C2.PC
1
C1.D
C11
C1.VC
12
C1.VC
13
C1.VC
11
C2.VC
13
C2.VC
11
C1.G
C11
C2C1
FC1
CB32
GB31
FB32VB31VB32VB33
FB31C
B31
θθ θ
θTC
0
PC0
PB3
TB0TB1
θTC
3
SB31
VB35
θTC
2
PC1
VC12
VC13
VC11
GC
11
θ
TC1
θ
EM71
FM71
VM71
VM72
VM74
PM1VM
73
VM0
T0
GM
72
DC
11
VM76
PM2VM
75SB11
VC14
One heat pump, oil or gas boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)34
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
One heat pump, oil or gas boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 35
Mixed additional heatOverviewMixed additional heat (oil or gas boiler) that can be started and stopped by a signal from the heat pump and is used as additional heat for both heating and potable hot water production.FunctionThe additional heat EM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function)Control of mixed additional heat EM0Engaging of of the mixed additional heat EM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the system re-ceives starting permission and the boiler circulation begins. When the temperature sensor TC1 confirms that the working temperature has been reached, the mixing valve control of VM0 begins which then regulates T0 to setpoint. Disconnection occurs when the mixing valve has closed and the degree minute calculation of the difference between the T0 actual value and set point value reaches the preset number of degree minutes. PM1 (& PM2) boiler pump controlThe boiler pump(s) is started at the same time as the start signal to the boiler EM0, and keeps running until 2 minutes after the start signal to EM0 has been removed.Heating buffer CW1 (potable hot water production)CW1 can also be heated by the boiler, via the thermal valve VM1, that start to open toward CW1 at 60°CAdjusting of mixed additional heat EM0The internal temperature regulation of the additional heat should be set about 10K above the maximal heating system temperature (the highest flow temperature of the heat curve). The start signal from the heat pump is connected in such a way that the additional heat cannot be started in the absence of this signal, but without the security function, requiring manual acknowledgement, going off. The boiler alarm should not be connected to the heat pump; if the additional heat is not hot within a reasonable amount of time an alarm is received through the temperature sensor TC1.Condensing boiler with low temp returnIf a condensing boiler with a 2:nd return is used, PM2 should be installed toghether with VM75, VM76 and DM71. It will supply the boiler with lower return temperature for the condensing part of the boiler. VM76 to be adjusted accoring to boiler requrement for minimum flow to this return (normally around 10% of nominal total flow).
One heat pump, oil or gas boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)36
14 One heat pump, oil or gas boiler, DHW from one coil cylinder
Fig. 13
VC
21
CC
91FC
91
θ TL1
CC
1
SC
21
VC
23
VL91
VA
21
PC
1V
C12
VC
13
VC
11
GC
11
GC
91VW
1
C2.V
C10
C2.T0θ
C2.V
C12
C2.D
C11
C2.G
C11
C1.P
C1
C2.P
C1
C1.D
C11
C1.V
C12
C1.V
C13
C1.V
C11
C2.V
C13
C2.V
C11
C1.G
C11
GC
11
FW41
DW
41
VW
42
VW
43P
W2
IW1
GW
42
OW
1
GW
41
VW
44
VW
41
MW
41θ
VL95
VW
96
VW
97
CW
1
VA
41V
W45
C2C1
θ
TC1
VW
95
θθ θ
θ
FC1
TC0
PC
0
PB
3
TB0
TB1
θTC
3
θ
EM
71FM
71V
M71
VM
72
VM
74P
M1VM
73
VM
0
T0
GM
72
θTC
2
DC
11
VM
76P
M2VM
75S
B11
CB
32G
B31
FB32
VB
31V
B32
VB
33
FB31
CB
31
SB
31
VB
35
VC
22
VC
24
One heat pump, oil or gas boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 37
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.Function
The (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
One heat pump, oil or gas boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)38
Mixed additional heatOverviewMixed additional heat (oil or gas boiler) that can be started and stopped by a signal from the heat pump and is used as additional heat for both heating and potable hot water production.FunctionThe additional heat EM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function)Control of mixed additional heat EM0Engaging of of the mixed additional heat EM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the system re-ceives starting permission and the boiler circulation begins. When the temperature sensor TC1 confirms that the working temperature has been reached, the mixing valve control of VM0 begins which then regulates T0 to setpoint. Disconnection occurs when the mixing valve has closed and the degree minute calculation of the difference between the T0 actual value and set point value reaches the preset number of degree minutes. PM1 (& PM2) boiler pump controlThe boiler pump(s) is started at the same time as the start signal to the boiler EM0, and keeps running until 2 minutes after the start signal to EM0 has been removed.Heating buffer CW1 (potable hot water production)CW1 can also be heated by the boiler, via the thermal valve VM1, that start to open toward CW1 at 60°CAdjusting of mixed additional heat EM0The internal temperature regulation of the additional heat should be set about 10K above the maximal heating system temperature (the highest flow temperature of the heat curve). The start signal from the heat pump is connected in such a way that the additional heat cannot be started in the absence of this signal, but without the security function, requiring manual acknowledgement, going off. The boiler alarm should not be connected to the heat pump; if the additional heat is not hot within a reasonable amount of time an alarm is received through the temperature sensor TC1.Condensing boiler with low temp returnIf a condensing boiler with a 2:nd return is used, PM2 should be installed toghether with VM75, VM76 and DM71. It will supply the boiler with lower return temperature for the condensing part of the boiler. VM76 to be adjusted accoring to boiler requrement for minimum flow to this return (normally around 10% of nominal total flow).
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is
controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
1x 7521)
1) Coil cylinder
1x 7541) 1x 7561)
1x G2542)
2) Heat pump size
5 15 151x G2642) 5 15 151x G2722) 5 20 201x G2802) 5 20 20
Table 15 no. of apartments
One heat pump, oil or gas boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 39
15 One heat pump, oil or gas boiler, DHW from two coil cylinders
Fig. 14
VC
21
CC
91FC91
θ TL1
CC
1
SC
21
VL91
VA
21
GC
91
VW
1
VC
10C
2.TC1
θ
C2.V
C12 C
2.DC
11
C2.G
C11
C1.P
C1
C2.P
C1
C1.D
C11
C1.V
C12
C1.V
C11
C1.V
C11
C2.V
C13
C2.V
C11
C1.G
C11
C2C1
θθ θ
θ
FC1
TC0
PC
0
PB
3
TB0
TB1
θTC
3
PC
1V
C12
VC
13
VC
11
GC
11
θ
TC1
θ
EM
71FM
71V
M71
VM
72
VM
74P
M1VM
73
VM
0
T0
GM
72
DC
11
VM
76P
M2VM
75S
B11
CB
32G
B31
FB32
VB
31V
B32
VB
33
FB31
CB
31
SB
31
VB
35
θTC
2
VC
23
VC
41
VC
42
Z2.V
A41
FW41
DW
42
VW
42
VW
43P
W2
GW
42
OW
1
VW
44
VW
45
GW
41V
W97
VL95
VW
96V
W95
θ
IW1
VW
41
Z1.V
A41
Z2.CW
1Z1.C
W1
Z2.TW1
MW
41θ
Z1.VL41
Z1.VC
23
θ Z1.TW1
DW
41
One heat pump, oil or gas boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)40
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
One heat pump, oil or gas boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 41
Mixed additional heatOverviewMixed additional heat (oil or gas boiler) that can be started and stopped by a signal from the heat pump and is used as additional heat for both heating and potable hot water production.FunctionThe additional heat EM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function)Control of mixed additional heat EM0Engaging of of the mixed additional heat EM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the system re-ceives starting permission and the boiler circulation begins. When the temperature sensor TC1 confirms that the working temperature has been reached, the mixing valve control of VM0 begins which then regulates T0 to setpoint. Disconnection occurs when the mixing valve has closed and the degree minute calculation of the difference between the T0 actual value and set point value reaches the preset number of degree minutes. PM1 (& PM2) boiler pump controlThe boiler pump(s) is started at the same time as the start signal to the boiler EM0, and keeps running until 2 minutes after the start signal to EM0 has been removed.Heating buffer CW1 (potable hot water production)CW1 can also be heated by the boiler, via the thermal valve VM1, that start to open toward CW1 at 60°CAdjusting of mixed additional heat EM0The internal temperature regulation of the additional heat should be set about 10K above the maximal heating system temperature (the highest flow temperature of the heat curve). The start signal from the heat pump is connected in such a way that the additional heat cannot be started in the absence of this signal, but without the security function, requiring manual acknowledgement, going off. The boiler alarm should not be connected to the heat pump; if the additional heat is not hot within a reasonable amount of time an alarm is received through the temperature sensor TC1.Condensing boiler with low temp returnIf a condensing boiler with a 2:nd return is used, PM2 should be installed toghether with VM75, VM76 and DM71. It will supply the boiler with lower return temperature for the condensing part of the boiler. VM76 to be adjusted accoring to boiler requrement for minimum flow to this return (normally around 10% of nominal total flow).
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is
controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
2x 7521)
1) Coil cylinder
2x 7541) 2x 7561)
1x G2542)
2) Heat pump size
30 40 401x G2642) 30 50 501x G2722) 30 55 551x G2802) 30 60 60
Table 16 no. of apartments
One heat pump, oil or gas boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)42
16 One heat pump, oil or gas boiler, DHW from fresh water station
Fig. 15
θ
θ
θ
Max
1 m
θ
θ
EW
1 PW
1TW
4θ
θ
θ T0
EM
1
VM
0
VM
74V
M73
VM
72
C1.TC
0θ
C1.V
C12 C
1.DC
11
GC
11
C1.P
C1
C1.V
C13
C1.V
C11
DW
42V
W43
PW
2
IW1
OW
1
VW
44V
W45
VW
41
VW
42
VC
21
TW1
SC
1
DC
23
VW
2
VC
22
VW
1
CC
92FC
92V
L92
DC
22
CC
1
CW
1
VA
41
VA
21G
C12
DC
21
DC
42
DC
41
VW
3
TW5
θ
VC
23
VC
24
VC
41
C1.V
C0
GC
42
VC
27
FW41
VC
26
VC
25
VW
96
θ TC2
CC
91FC
91V
L91
VW
95
FC1
TC0
PC
0
PB
3TB
0
TB1
VC
1
TC3
θ
q
TW3
θ
TW2
GW
1
VW
46
θ TC1
VW
96
VW
95
VM
1
DC
43
DC
42
VC
26
PM
1
SB
11
VM
76P
M2
VM
75
CB
32G
B31
FB32
VB
31V
B32
VB
33
FB31
CB
31
SB
31
VB
35D
W41
DC
43
TL1θ
TW6
θ
TW7
θ
FWS
One heat pump, oil or gas boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 43
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.Function
The (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Mixed additional heatOverview
Mixed additional heat (oil or gas boiler) that can be started and stopped by a signal from the heat pump and is used as additional heat for both
heating and potable hot water production.Function
One heat pump, oil or gas boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)44
The additional heat EM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function)Control of mixed additional heat EM0Engaging of of the mixed additional heat EM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the system re-ceives starting permission and the boiler circulation begins. When the temperature sensor TC1 confirms that the working temperature has been reached, the mixing valve control of VM0 begins which then regulates T0 to setpoint. Disconnection occurs when the mixing valve has closed and the degree minute calculation of the difference between the T0 actual value and set point value reaches the preset number of degree minutes. PM1 (& PM2) boiler pump controlThe boiler pump(s) is started at the same time as the start signal to the boiler EM0, and keeps running until 2 minutes after the start signal to EM0 has been removed.Heating buffer CW1 (potable hot water production)CW1 can also be heated by the boiler, via the thermal valve VM1, that start to open toward CW1 at 60°CAdjusting of mixed additional heat EM0The internal temperature regulation of the additional heat should be set about 10K above the maximal heating system temperature (the highest flow temperature of the heat curve). The start signal from the heat pump is connected in such a way that the additional heat cannot be started in the absence of this signal, but without the security function, requiring manual acknowledgement, going off. The boiler alarm should not be connected to the heat pump; if the additional heat is not hot within a reasonable amount of time an alarm is received through the temperature sensor TC1.Condensing boiler with low temp returnIf a condensing boiler with a 2:nd return is used, PM2 should be installed toghether with VM75, VM76 and DM71. It will supply the boiler with lower return temperature for the condensing part of the boiler. VM76 to be adjusted accoring to boiler requrement for minimum flow to this return (normally around 10% of nominal total flow).
Fresh water stationOverviewThe property also requires a rather big amount of potable hot water, which is supplied by a fresh water station.FunctionThe fresh water station is heated by a buffer cylinder, that is, in turn, heated by the heat pump or the boiler.The return from the fresh water station is either sent back to the mentioned buffer, or to the heating buffer, de-pending on the return temperature.Therefore, the heating buffer must always be heated to a temperature around 40°C, also in summer. And therefore, all heating systems must be mixed.Heating buffer CW1 (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceeds the stop limit. In hot water mode the compressor starts and the 3-way valves VW1 and VW2 is put in hot water position.Fresh water stationThe fresh water station maintains the potable hot water temperature TW4 to a constant value by collecting heat from CW1 using PW1 at the needed speed. At sudden changes in potable hot water flow,The flow sensor GW1 can influ nce the speed of PW1 before there has been a change in TW4 temperature. The heating water return temperature from
the fresh water station can either be high, when there is almost only circulation heating, then VW3 sends the water back to CW1, but when the potable hot water flow increases, the return temperature will drop, and VW3 will change to send the water to heating buffer CC1 for pre-heating.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water station and the buffer CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between TW4 and TW6/GW41 should be about 5K.
DHW dimensioning, Heat pump 54 kW
DHW dimensioning, Heat pump 64 kW
DHW dimensioning, Heat pump 72 kW
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
45 -2x CW1 750 l and 1x CC1 750 l2) 55 -2x CW1 750 l and 2x CC1 750 l2) 65 -3x CW1 750 l and 2x CC1 750 l2) 70 -3x CW1 750 l and 3x CC1 750 l2) 80 -4x CW1 750 l and 3x CC1 750 l2) 85 -4x CW1 750 l and 4x CC1 750 l2) 95 95
Table 17 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
50 -2x CW1 750 l and 1x CC1 750 l2) 60 -2x CW1 750 l and 2x CC1 750 l2) 70 -3x CW1 750 l and 2x CC1 750 l2) 80 -3x CW1 750 l and 3x CC1 750 l2) 85 -4x CW1 750 l and 3x CC1 750 l2) 95 954x CW1 750 l and 4x CC1 750 l2) 100 105
Table 18 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
60 -2x CW1 750 l and 1x CC1 750 l2) 65 -2x CW1 750 l and 2x CC1 750 l2) 75 -3x CW1 750 l and 2x CC1 750 l2) 85 -3x CW1 750 l and 3x CC1 750 l2) 95 954x CW1 750 l and 3x CC1 750 l2) 100 1004x CW1 750 l and 4x CC1 750 l2) 100 115
Table 19 no. of apartments
One heat pump, oil or gas boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 45
DHW dimensioning, Heat pump 80 kW
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
65 -2x CW1 750 l and 1x CC1 750 l2) 75 -2x CW1 750 l and 2x CC1 750 l2) 80 -3x CW1 750 l and 2x CC1 750 l2) 90 -3x CW1 750 l and 3x CC1 750 l2) 100 1004x CW1 750 l and 3x CC1 750 l2) 100 1104x CW1 750 l and 4x CC1 750 l2) 100 120
Table 20 no. of apartments
Two heat pumps, oil or gas boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)46
17 Two heat pumps, oil or gas boiler, no DHW from heat pump
Fig. 16
Z1.VB
32
CC
1
VA
21
Z2.VB
31
Z2.VC
22
Z2.SC
1
Z2.VC
21
Z2.VB
32
Z2.DB
31
Z2.DC
21
Z1.VC
22
θ TL1
Z1.DC
21
CC
91FC
91
VL91
GC
91
Z1.SB
31
Z1.DB
31
Z1.SC
1
Z1
θ
PC
0
PB
3
θθ
TB0
TB1
θ
Z1.FC1
TC0
θTC
3
Z2
θθ θ
θ
Z2.FC1
TC0
PC
0
PB
3
TB0
TB1
θTC
3
CB
32G
B31
FB32
VB
31V
B32
VB
33
FB31
CB
31Z2.S
B31
θTC
2
PC
1V
C12
VC
13 VC
11
GC
11
θ
TC1
θ
EM
71FM
71V
M71
VM
72
VM
74P
M1VM
73
VM
0
T0
GM
72
DC
11
VM
76P
M2VM
75S
B11
VC
14
Z1.SB
31
Z1.VC
21
Two heat pumps, oil or gas boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 47
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, oil or gas boiler, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)48
Mixed additional heatOverviewMixed additional heat (oil or gas boiler) that can be started and stopped by a signal from the heat pump and is used as additional heat for both heating and potable hot water production.FunctionThe additional heat EM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function)Control of mixed additional heat EM0Engaging of of the mixed additional heat EM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the system re-ceives starting permission and the boiler circulation begins. When the temperature sensor TC1 confirms that the working temperature has been reached, the mixing valve control of VM0 begins which then regulates T0 to setpoint. Disconnection occurs when the mixing valve has closed and the degree minute calculation of the difference between the T0 actual value and set point value reaches the preset number of degree minutes. PM1 (& PM2) boiler pump controlThe boiler pump(s) is started at the same time as the start signal to the boiler EM0, and keeps running until 2 minutes after the start signal to EM0 has been removed.Heating buffer CW1 (potable hot water production)CW1 can also be heated by the boiler, via the thermal valve VM1, that start to open toward CW1 at 60°CAdjusting of mixed additional heat EM0The internal temperature regulation of the additional heat should be set about 10K above the maximal heating system temperature (the highest flow temperature of the heat curve). The start signal from the heat pump is connected in such a way that the additional heat cannot be started in the absence of this signal, but without the security function, requiring manual acknowledgement, going off. The boiler alarm should not be connected to the heat pump; if the additional heat is not hot within a reasonable amount of time an alarm is received through the temperature sensor TC1.Condensing boiler with low temp returnIf a condensing boiler with a 2:nd return is used, PM2 should be installed toghether with VM75, VM76 and DM71. It will supply the boiler with lower return temperature for the condensing part of the boiler. VM76 to be adjusted accoring to boiler requrement for minimum flow to this return (normally around 10% of nominal total flow).
Two heat pumps, oil or gas boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 49
18 Two heat pumps, oil or gas boiler, DHW from one coil cylinder
Fig. 17
Z1.VB
32
CC
1
VA
21
Z2.VB
31
Z2.VC
22
Z2.SC
1
Z2.VC
21
Z2.VB
32
Z2.DB
31
Z2.DC
21
Z1.VC
22
θ TL1
Z1.DC
21
CC
91FC
91
VL91
GC
91
Z1.VB
31
Z1.DB
31
Z1.SC
1
Z1
θ
PC
0
PB
3
θθ
TB0
TB1
θ
Z1.FC1
TC0
θTC
3
Z2
θθ θ
θ
Z2.FC1
TC0
PC
0
PB
3
TB0
TB1
θTC
3
CB
32G
B31
FB32
VB
31V
B32
VB
33
FB31
CB
31Z2.S
B31
θTC
2
PC
1V
C12
VC
13
VC
11
GC
11
θ
TC1
θ
EM
71FM
71V
M71
VM
72
VM
74P
M1VM
73
VM
0
T0
GM
72
DC
11
VM
76P
M2VM
75S
B11
Z1.VW
1
FW41
DW
42
VW
42
VW
43P
W2
GW
42
OW
1
VW
44V
W45
GW
41V
W97
VL95
VW
96
VW
95
IW1
VW
41
VA
41
CW
1
MW
41θ
Z1.VC
23
θ TW1
Z1.SB
31
Z1.VC
23
Z1.VC
24
Z1.VC
21
DW
41
Two heat pumps, oil or gas boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)50
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filters Z1.SB31 and Z2.SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, oil or gas boiler, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 51
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
1x 7521)
1) Coil cylinder
1x 7541) 1x 7561)
1x G2542)
2) Heat pump size
5 15 151x G2642) 5 15 151x G2722) 5 20 201x G2802) 5 20 20
Table 21 no. of apartments
Two heat pumps, oil or gas boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)52
19 Two heat pumps, oil or gas boiler, DHW from two coil cylinders
Fig. 18
CC
1
VA
21
Z2.VC
22
Z2.SC
1
Z2.VC
21
Z2.DC
21
Z1.VC
22
θ TL1
Z1.DC
21
PC
1V
C12
VC
11
GC
11
SC
11
VC
13V
C14
Z2.VW
1
CC
91FC
91
VL91
GC
91
Z2
θθ θ
θ
Z2.FC1
TC0
PC
0
PB
3
TB0
TB1
θTC
3
Z1.DB
31
Z1.SC
1
Max
1 m
Z1.VW
1
Z1
θ
PC
0
θθ
TB0
TB1
θ
Z1.FC1
TC0
θTC
3
Z1.VB
32
Z2.VB
32
Z2.DB
31
PB
3
Z1.VB
31
Z2.VB
31
FB32
CB
32G
B31
Z2.SB
31
VB
31V
B32
VB
33
FB31
CB
31
θ
TC1
θ
EM
71FM
71
VM
71
VM
72
VM
74P
M1VM
73
VM
0
GM
72
DC
11
VM
76P
M2VM
75
T0θ
TC2
Z2.VC
23
Z1.VC
23
Z2.V
A41
FW41
DW
42
VW
42
VW
43P
W2
GW
42
OW
1
VW
44
VW
45
GW
41V
W97
VL95
VW
96V
W95
θ
IW1
VW
41
Z1.V
A41
Z2.CW
1Z1.C
W1
Z2.TW1
MW
41θ
Z1.VL41
VW
46
θ Z1.TW1
Z1.SB
31
Z1.VC
21
DW
41Z1.V
C24
Z2.VC
24
Two heat pumps, oil or gas boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 53
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filters Z1.SB31 and Z2.SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, oil or gas boiler, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)54
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
2x 7521)
1) Coil cylinder
2x 7541) 2x 7561)
2x G2542)
2) Heat pump size
30 40 401x G254 + 1x G2642) 30 45 451x G254 + 1x G2722) 30 50 502x G2642) 30 50 501x G254 + 1x G2802) 30 50 501x G264 + 1x G2722) 30 55 552x G2722) 30 55 551x G264 + 1x G2802) 30 55 551x G272 + 1x G2802) 30 60 602x G2802) 30 60 60
Table 22 no. of apartments
Two heat pumps, oil or gas boiler, DHW from four coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 55
20 Two heat pumps, oil or gas boiler, DHW from four coil cylinders
Fig. 19
CC
1
VA
21
Z2.VC
22
Z2.SC
1
Z2.VC
21
Z2.DC
21
Z1.VC
22
Z1.SC
1
Max
1 m
Z1.DC
21
Z1.VW
1
PC
0
PC
0
Z2.VW
1
CC
91FC
91
VL91
GC
91
Z2.VC
23
Z1.VC
23
CB
32G
B31
FB32
VB
31V
B32
VB
33
FB31
CB
31
θθ θ
θTC
0
PB
3
TB0
TB1
θTC
3
SB
31
θθ θ
θTC
0
PB
3
TB0
TB1
θTC
3
Z2.VB
32
Z2.DB
31
Z1.DB
31
FC1
Z1.VB
31
Z2.VB
31
Z1
Z2
Z2.V
A41
FW41
DW
42
VW
42VW
43P
W2
GW
42
OW
1
VW
44
VW
45
GW
41
Z2.V
A42
Z1.TW
1θ
IW1
VW
41
Z1.V
A42
θ
Z1.V
A41
Z2.CW
1Z2.C
W2
Z1.CW
1Z1.C
W2
Z2.V
C41
Z2.V
C42
Z1.V
C41
Z1.V
C42
Z2.TW1
MW
41θ
Z2.VL42
Z2.VL41
Z1.VL42
Z2Z1
VW
46
Z1.VC
23
VW
97V
L95V
W96
VW
95
θ TL1
PC
1V
C12
VC
11
GC
11
SC
11
VC
13V
C14
θ
TC1
θ
EM
71FM
71
VM
71
VM
72
VM
74P
M1VM
73
VM
0
GM
72
DC
11
VM
76P
M2VM
75
T0θ
TC2
FC1
θTC
1
θTC
1
DW
41
Two heat pumps, oil or gas boiler, DHW from four coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)56
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connecting the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filters Z1.SB31 and Z2.SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, oil or gas boiler, DHW from four coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 57
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
4x 7521)
1) Coil cylinder
4x 7541) 4x 7561)
2x G2542)
2) Heat pump size
80 80 801x G254 + 1x G2642) 105 105 1051x G254 + 1x G2722) 115 115 1152x G2642) 115 115 1151x G254 + 1x G2802) 120 120 1201x G264 + 1x G2722) 120 120 1202x G2722) 120 130 1301x G264 + 1x G2802) 120 130 1301x G272 + 1x G2802) 120 135 1352x G2802) 120 145 145
Table 23 no. of apartments
Two heat pumps, oil or gas boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)58
21 Two heat pumps, oil or gas boiler, DHW from fresh water station
Fig. 20
6720817052-18.2I
Two heat pumps, oil or gas boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 59
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow of one to the combined nominal flow of both heat pumps. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes up to two times T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filters Z1.SB31 and Z2.SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, oil or gas boiler, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)60
Fresh water stationOverviewThe property also requires a rather big amount of potable hot water, which is supplied by a fresh water station.FunctionThe fresh water station is heated by buffer cylinders, that is, in turn, heated by the heat pumps or the boiler.The return from the fresh water station is either sent back to the after heating buffer Z2.CW1, or to the pre-heating buffer Z1.CW1, de-pending on the return temperature.Heating buffer CW1 (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceeds the stop limit. In hot water mode the compressor starts and the 3-way valves VW1 and VW2 is put in hot water position.Fresh water stationThe fresh water station maintains the potable hot water temperature TW4 to a constant value by collecting heat from CW1 using PW1 at the needed speed. At sudden changes in potable hot water flow,The flow sensor GW1 can influ nce the speed of PW1 before there has been a change in TW4 temperature. The heating water return temperature from the fresh water station can either be high, when there is almost only circulation heating, then VW3 sends the water back to Z2.CW1, but when the potable hot water flow increases, the return temperature will drop, and VW3 will change to send the water to after-heating buffer Z1.CW1 for pre-heating.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water station and the buffer CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between TW4 and TW6/GW41 should be about 5K.
DHW dimensioning, Heat pumps 2x 54 kW
DHW dimensioning, Heat pumps 2x 64 kW
DHW dimensioning, Heat pumps 2x 72 kW
DHW dimensioning, Heat pumps 2x 80 kW
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
85 -2x CW1 750 l and 1x CC1 750 l2) 95 -2x CW1 750 l and 2x CC1 750 l2) 100 1053x CW1 750 l and 2x CC1 750 l2) 100 1153x CW1 750 l and 3x CC1 750 l2) 100 1204x CW1 750 l and 3x CC1 750 l2) 100 1304x CW1 750 l and 4x CC1 750 l2) 100 145
Table 24 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
100 1002x CW1 750 l and 1x CC1 750 l2) 100 1102x CW1 750 l and 2x CC1 750 l2) 100 1203x CW1 750 l and 2x CC1 750 l2) 100 1303x CW1 750 l and 3x CC1 750 l2) 100 1404x CW1 750 l and 3x CC1 750 l2) 100 1504x CW1 750 l and 4x CC1 750 l2) 100 165
Table 25 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
100 1152x CW1 750 l and 1x CC1 750 l2) 100 1252x CW1 750 l and 2x CC1 750 l2) 100 1353x CW1 750 l and 2x CC1 750 l2) 100 1453x CW1 750 l and 3x CC1 750 l2) 100 1604x CW1 750 l and 3x CC1 750 l2) 100 1704x CW1 750 l and 4x CC1 750 l2) 100 185
Table 26 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
100 1302x CW1 750 l and 1x CC1 750 l2) 100 1402x CW1 750 l and 2x CC1 750 l2) 100 1503x CW1 750 l and 2x CC1 750 l2) 100 1603x CW1 750 l and 3x CC1 750 l2) 100 1754x CW1 750 l and 3x CC1 750 l2) 100 1904x CW1 750 l and 4x CC1 750 l2) 100 205
Table 27 no. of apartments
One heat pump, district heating, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 61
22 One heat pump, district heating, no DHW from heat pump
θ
θθ
T0
VC
2
EC
1
VC
24
PC
1D
C11
VC
12
VC
13
VC
11
GC
11
CC
91FC
91
CC
1
VL91
VA
21
VW
2 EW
1
TW2
DW
42 VW
42
VW
43P
W2
IW1
GW
42O
W1
VW
44V
W45
VW
41
TL1
VC
14 SC
11
θTC
2
VC
23
SC
21
PC
0
θθ θ
θ
FC1
TC0
PB
3
TB0
TB1
θTC
3
CB
32G
B31
FB32
VB
31V
B32
VB
33
FB31
CB
31
SB
31
VB
35
DW
41
One heat pump, district heating, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)62
Fig. 21
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
One heat pump, district heating, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 63
District heatingOverviewPrimary valves for district heating water are controlled by the heat pump controller and an accessory module and is used as additional heat for both heating and potable hot water production.FunctionDistrict heating via VM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function). District heating via VW2 as-sists when CW1, which is heataed the heat pump, is unable to reach set DHW temperature or when the addition-al heat is cheaper than heat produced by the heat pump (Hybrid function).Control of district heating for additional heatActivation of additional heat via VM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the additional heat re-ceives starting permission, and the mixing valve control of VM0 begins, which then regulates T0 to set point. Dis-connection occurs when VM0 has closed and the degree minute calculation of the difference between the T0 ac-tual value and set point value reaches the preset number of degree minutes, and hybrid function for district heat-ing is not active.Control of district heating hybrid functionIf the calculated current energy cost for producing heat with the heat pump is higher than the current cost for dis-trict heating, the district heating valves then activates to regulate T0 to its set point, and the heat pump shuts down. When the cost of district heating increases above the price for energy produced by the heat pump, the heat pump restart, and the district heating valve close.Heating potable hot water production with district heatingIf the potable hot water temperature at TW2 drops below set point, the district heating valve VW2 immediately acti-vates, and start regulating TW2 to set point by opening VW2. This function is controlled by the accessory module RC-Multi.
One heat pump, district heating, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)64
23 One heat pump, district heating, DHW from one coil cylinder
Fig. 22
θ
θ
θ
θ
T0V
C2
EC
1
VC
24
VC
23
VC
22
VW
1
PC
1D
C11
VC
12
VC
13
VC
11
GC
11
VC
21
CC
91FC
91
CC
1
VL91
VA
21
SC
21
VW
2 EW
1
CW
1
TW1
TW2
VW
97
FW41
GW
41
DW
42 VW
42
VW
43P
W2
IW1
GW
42O
W1
VW
44V
W45
VW
41
VA
41
GW
43
VL95
VW
96V
W95
TL1
EW
2
EC
2V
C14 S
C11
PC
0
Max
1 m
θθ θ
θ
FC1
TC0
PB
3
TB0
TB1
θTC
3
CB
32G
B31
FB32
VB
31V
B32
VB
33
FB31
CB
31
SB
31
VB
35
θTC
2
DW
41
One heat pump, district heating, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 65
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
One heat pump, district heating, DHW from one coil cylinder
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)66
District heatingOverviewPrimary valves for district heating water are controlled by the heat pump controller and an accessory module and is used as additional heat for both heating and potable hot water production.FunctionDistrict heating via VM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function). District heating via VW2 as-sists when CW1, which is heataed the heat pump, is unable to reach set DHW temperature or when the addition-al heat is cheaper than heat produced by the heat pump (Hybrid function).Control of district heating for additional heatActivation of additional heat via VM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the additional heat re-ceives starting permission, and the mixing valve control of VM0 begins, which then regulates T0 to set point. Dis-connection occurs when VM0 has closed and the degree minute calculation of the difference between the T0 ac-tual value and set point value reaches the preset number of degree minutes, and hybrid function for district heat-ing is not active.Control of district heating hybrid functionIf the calculated current energy cost for producing heat with the heat pump is higher than the current cost for dis-trict heating, the district heating valves then activates to regulate T0 to its set point, and the heat pump shuts down. When the cost of district heating increases above the price for energy produced by the heat pump, the heat pump restart, and the district heating valve close.Heating potable hot water production with district heatingIf the potable hot water temperature at TW2 drops below set point, the district heating valve VW2 immediately acti-vates, and start regulating TW2 to set point by opening VW2. This function is controlled by the accessory module RC-Multi.
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.
Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
1x 7521)
1) Coil cylinder
1x 7541) 1x 7561)
1x G2542)
2) Heat pump size
5 15 151x G2642) 5 15 151x G2722) 5 20 201x G2802) 5 20 20
Table 28 no. of apartments
One heat pump, district heating, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 67
24 One heat pump, district heating, DHW from two coil cylinders
Fig. 23
θ
θ
θ
θ
T0
VC
2E
C1
VC
24
VC
23
VC
22
VW
1
PC
1D
C11
VC
12
VC
13
VC
11
GC
11
VC
21
CC
91FC
91
CC
1
VL91
VA
21
SC
21
VW
2 EW
1
CW
1
TW1
TW2
VW
97
FW41
GW
41VW
45
VW
42
VW
43P
W2
IW1
GW
42O
W1
VW
44
DW
43
VW
41
VA
41
GW
43
VL95
VW
96V
W95
TL1
EW
2
EC
2V
C14 S
C11
PC
0
Max
1 m
θθ θ
θ
FC1
TC0
PB
3
TB0
TB1
θTC
3
CB
32G
B31
FB32
VB
31V
B32
VB
33
FB31
CB
31
SB
31
VB
35
θTC
2
CW
2
VA
42
VW
48D
W44
DW
41V
W47
DW
42V
W46
VC
42
VC
41
FC92
One heat pump, district heating, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)68
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
One heat pump, district heating, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 69
District heatingOverviewPrimary valves for district heating water are controlled by the heat pump controller and an accessory module and is used as additional heat for both heating and potable hot water production.FunctionDistrict heating via VM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function). District heating via VW2 as-sists when CW1, which is heataed the heat pump, is unable to reach set DHW temperature or when the addition-al heat is cheaper than heat produced by the heat pump (Hybrid function).Control of district heating for additional heatActivation of additional heat via VM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the additional heat re-ceives starting permission, and the mixing valve control of VM0 begins, which then regulates T0 to set point. Dis-connection occurs when VM0 has closed and the degree minute calculation of the difference between the T0 ac-tual value and set point value reaches the preset number of degree minutes, and hybrid function for district heat-ing is not active.Control of district heating hybrid functionIf the calculated current energy cost for producing heat with the heat pump is higher than the current cost for dis-trict heating, the district heating valves then activates to regulate T0 to its set point, and the heat pump shuts down. When the cost of district heating increases above the price for energy produced by the heat pump, the heat pump restart, and the district heating valve close.Heating potable hot water production with district heatingIf the potable hot water temperature at TW2 drops below set point, the district heating valve VW2 immediately acti-vates, and start regulating TW2 to set point by opening VW2. This function is controlled by the accessory module RC-Multi.
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.
Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
2x 7521)
1) Coil cylinder
2x 7541) 2x 7561)
1x G2542)
2) Heat pump size
30 40 401x G2642) 30 50 501x G2722) 30 55 551x G2802) 30 60 60
Table 29 no. of apartments
One heat pump, district heating, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)70
25 One heat pump, district heating, DHW from fresh water station
Fig. 24
θθ
θ TW1
VL92C
W1
VA
41D
C23 V
C24
VW
96
SC
1
VW
1
VC
21
CC
1
θ
T0V
C2
EC
1P
C1
DC
11
VC
12
VC
13
VC
11
GC
11
CC
91FC
91V
L91
VA
21
VW
2
EW
1
TW8D
W42
VW
43P
W2
IW1
OW
1
VW
44V
W45
VW
41
TL1
EW
2
EC
2V
C14 S
C11
VB
35
Max
1 m
θ
PC
0
PB
3
θθ
TB0
TB1
θ
FC1
TC0
θTC
3
FB32
CB
32G
B31
SB
31
VB
31V
B32
VB
33
FB31
CB
31
θ TC2
VW
1
DC
24
DW
41
EW
1 PC
4TW
4θ
VW
42
DC
42
VW
3
TW5
θ
VC
41θ
q
TW3
θ
TW2
GW
1
VW
46D
C43
FWS
VC
23
VC
22
DC
21
DC
22
VC
25
VC
26
GC
41
FW41
θ TW6
θTW
7
One heat pump, district heating, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 71
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system, but optimal function is obtained when the heating system nominal flow equals that of the heat pump. With the heat pump in continuous operation, the temperature difference TC3 – TC0 becomes the same as T0 – GC11. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpOverwiewIn winter mode the respective Compressor in the heat pump (ER1, ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis, and stops when T0 rises above the preset temperatureby the current compressor hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first.Pump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
One heat pump, district heating, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)72
District heatingOverviewPrimary valves for district heating water are controlled by the heat pump controller and an accessory module and is used as additional heat for both heating and potable hot water production.FunctionDistrict heating via VM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function). District heating via VW2 as-sists when CW1, which is heataed the heat pump, is unable to reach set DHW temperature or when the addition-al heat is cheaper than heat produced by the heat pump (Hybrid function).Control of district heating for additional heatActivation of additional heat via VM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the additional heat re-ceives starting permission, and the mixing valve control of VM0 begins, which then regulates T0 to set point. Dis-connection occurs when VM0 has closed and the degree minute calculation of the difference between the T0 ac-tual value and set point value reaches the preset number of degree minutes, and hybrid function for district heat-ing is not active.Control of district heating hybrid functionIf the calculated current energy cost for producing heat with the heat pump is higher than the current cost for dis-trict heating, the district heating valves then activates to regulate T0 to its set point, and the heat pump shuts down. When the cost of district heating increases above the price for energy produced by the heat pump, the heat pump restart, and the district heating valve close.Heating potable hot water production with district heatingIf the potable hot water temperature at TW2 drops below set point, the district heating valve VW2 immediately acti-vates, and start regulating TW2 to set point by opening VW2. This function is controlled by the accessory module RC-Multi.
Fresh water stationOverviewThe property also requires a rather big amount of potable hot water, which is supplied by a fresh water station.FunctionThe fresh water station is heated by a buffer cylinder, that is, in turn, heated by the heat pump or the district heating.The return from the fresh water station is either sent back to the mentioned buffer, or to the heating buffer, de-pending on the return temperature.Therefore, the heating buffer must always be heated to a temperature around 40°C, also in summer. And therefore, all heating systems must be mixed.Heating buffer CW1 (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceeds the stop limit. In hot water mode the compressor starts and the 3-way valves VW1 and VW2 is put in hot water position.Fresh water stationThe fresh water station maintains the potable hot water temperature TW4 to a constant value by collecting heat from CW1 using PW1 at the needed speed. At sudden changes in potable hot water flow,The flow sensor GW1 can influ nce the speed of PW1 before there has been a change in TW4 temperature. The heating water return temperature from the fresh water station can either be high, when there is almost only circulation heating, then VW3 sends the water back to CW1, but when the potable hot water flow increases, the return temperature will drop,
and VW3 will change to send the water to heating buffer CC1 for pre-heating.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water station and the buffer CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between TW4 and TW6/GW41 should be about 5K.
DHW dimensioning, Heat pump 54 kW
DHW dimensioning, Heat pump 64 kW
DHW dimensioning, Heat pump 72 kW
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
45 -2x CW1 750 l and 1x CC1 750 l2) 55 -2x CW1 750 l and 2x CC1 750 l2) 65 -3x CW1 750 l and 2x CC1 750 l2) 70 -3x CW1 750 l and 3x CC1 750 l2) 80 -4x CW1 750 l and 3x CC1 750 l2) 85 -4x CW1 750 l and 4x CC1 750 l2) 95 95
Table 30 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
50 -2x CW1 750 l and 1x CC1 750 l2) 60 -2x CW1 750 l and 2x CC1 750 l2) 70 -3x CW1 750 l and 2x CC1 750 l2) 80 -3x CW1 750 l and 3x CC1 750 l2) 85 -4x CW1 750 l and 3x CC1 750 l2) 95 954x CW1 750 l and 4x CC1 750 l2) 100 105
Table 31 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
60 -2x CW1 750 l and 1x CC1 750 l2) 65 -2x CW1 750 l and 2x CC1 750 l2) 75 -3x CW1 750 l and 2x CC1 750 l2) 85 -3x CW1 750 l and 3x CC1 750 l2) 95 954x CW1 750 l and 3x CC1 750 l2) 100 1004x CW1 750 l and 4x CC1 750 l2) 100 115
Table 32 no. of apartments
One heat pump, district heating, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 73
DHW dimensioning, Heat pump 80 kW
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
65 -2x CW1 750 l and 1x CC1 750 l2) 75 -2x CW1 750 l and 2x CC1 750 l2) 80 -3x CW1 750 l and 2x CC1 750 l2) 90 -3x CW1 750 l and 3x CC1 750 l2) 100 1004x CW1 750 l and 3x CC1 750 l2) 100 1104x CW1 750 l and 4x CC1 750 l2) 100 120
Table 33 no. of apartments
Two heat pumps, district heating, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)74
26 Two heat pumps, district heating, no DHW from heat pump
Fig. 25
VW
2
EW
2
EW
1
θT0θV
C2
EC
1
CC
91FC
91V
L91
VA
21
EC
2
CC
1
Z2.DC
21
Z1.DC
21
PC
1D
C11
VC
12
VC
13
VC
11
GC
11V
C14 S
C11
TW2
DW
42 VW
42
VW
43P
W2
IW1
GW
43O
W1
VW
44V
W45
VW
41
θ TL1
θTC
2
DW
41
Z1.VB
32 Z2.SC
1
Z1.SC
1
Z2.VB
32
Z2.DB
31
Z1.DB
31
Z1
θ
PC
0
PB
3
Z2
θθ θ
θ
Z2.FC1
TC0
PC
0
PB
3
TB0
TB1
VC
1θ
TC3
θθ
TB0
TB1
θ
Z1.FC1
TC0
VC
1θ
TC3
Z1.VB
31
Z2.V
B31
FB32 C
B32 G
B31
Z2.SB
31
VB
31V
B32
VB
33
FB31
CB
31
Z1.SB
31
Z1.VC
22
Z1.VC
21
Z2.VC
22
Z2.VC
21
Two heat pumps, district heating, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 75
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filter SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, district heating, no DHW from heat pump
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)76
District heatingOverviewPrimary valves for district heating water are controlled by the heat pump controller and an accessory module and is used as additional heat for both heating and potable hot water production.FunctionDistrict heating via VM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function). District heating via VW2 as-sists when CW1, which is heataed the heat pump, is unable to reach set DHW temperature or when the addition-al heat is cheaper than heat produced by the heat pump (Hybrid function).Control of district heating for additional heatActivation of additional heat via VM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the additional heat re-ceives starting permission, and the mixing valve control of VM0 begins, which then regulates T0 to set point. Dis-connection occurs when VM0 has closed and the degree minute calculation of the difference between the T0 ac-tual value and set point value reaches the preset number of degree minutes, and hybrid function for district heat-ing is not active.Control of district heating hybrid functionIf the calculated current energy cost for producing heat with the heat pump is higher than the current cost for dis-trict heating, the district heating valves then activates to regulate T0 to its set point, and the heat pump shuts down. When the cost of district heating increases above the price for energy produced by the heat pump, the heat pump restart, and the district heating valve close.Heating potable hot water production with district heatingIf the potable hot water temperature at TW2 drops below set point, the district heating valve VW2 immediately acti-vates, and start regulating TW2 to set point by opening VW2. This function is controlled by the accessory module RC-Multi.
Two heat pumps, district heating, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 77
27 Two heat pumps, district heating, DHW from two coil cylinders
Fig. 26
VW
2
EW
2
EW
1
Z1.CW
1
θ Z1.TW1
θ
Z1.VC
22
GW
42
Z1.VC
21
Z1.VA
41
GW
44
Z2.CW
1
θ GW
41
Z2.VA
41
Z2.VC
22Z2.V
C21
Z1.VL41
Z2.TW1
T0θV
C2
EC
1
CC
91FC
91V
L91
VA
21
EC
2
Z1.VB
32
Z1.VW
1
Z2.VW
1
CC
1
Z2.DC
21
Z1.DC
21
PC
1D
C11
VC
12
VC
13
VC
11
GC
11V
C14 S
C11
VW
97
VL95
VW
96V
W95
FW41
TW2
DW
42 VW
42
VW
43P
W2
IW1
GW
43O
W1
VW
44V
W45
VW
41
θ TL1
θTC
2
DW
41
Z2.SC
1
Z1.SC
1
Z2.VB
32
Z2.DB
31
Z1.DB
31
Max
1 mZ1
θ
PC
0
PB
3
Z2
θθ θ
θ
Z2.FC1
TC0
PC
0
PB
3
TB0
TB1
VC
1θ
TC3
θθ
TB0
TB1
θ
Z1.FC1
TC0
VC
1θ
TC3
Z1.VB
31
Z2.V
B31
FB32 C
B32 G
B31
Z2.SB
31
VB
31V
B32
VB
33
FB31
CB
31
Z1.SB
31
Z1.VC
22
Z2.VC
21
Z2.VC
22
Z1.VC
21
Two heat pumps, district heating, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)78
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filters Z1.SB31 and Z2.SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, district heating, DHW from two coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 79
District heatingOverviewPrimary valves for district heating water are controlled by the heat pump controller and an accessory module and is used as additional heat for both heating and potable hot water production.FunctionDistrict heating via VM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function). District heating via VW2 as-sists when CW1, which is heataed the heat pump, is unable to reach set DHW temperature or when the addition-al heat is cheaper than heat produced by the heat pump (Hybrid function).Control of district heating for additional heatActivation of additional heat via VM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the additional heat re-ceives starting permission, and the mixing valve control of VM0 begins, which then regulates T0 to set point. Dis-connection occurs when VM0 has closed and the degree minute calculation of the difference between the T0 ac-tual value and set point value reaches the preset number of degree minutes, and hybrid function for district heat-ing is not active.Control of district heating hybrid functionIf the calculated current energy cost for producing heat with the heat pump is higher than the current cost for dis-trict heating, the district heating valves then activates to regulate T0 to its set point, and the heat pump shuts down. When the cost of district heating increases above the price for energy produced by the heat pump, the heat pump restart, and the district heating valve close.Heating potable hot water production with district heatingIf the potable hot water temperature at TW2 drops below set point, the district heating valve VW2 immediately acti-vates, and start regulating TW2 to set point by opening VW2. This function is controlled by the accessory module RC-Multi.
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.
Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
2x 7521)
1) Coil cylinder
2x 7541) 2x 7561)
2x G2542)
2) Heat pump size
30 40 401x G254 + 1x G2642) 30 45 451x G254 + 1x G2722) 30 50 502x G2642) 30 50 501x G254 + 1x G2802) 30 50 501x G264 + 1x G2722) 30 55 552x G2722) 30 55 551x G264 + 1x G2802) 30 55 551x G272 + 1x G2802) 30 60 602x G2802) 30 60 60
Table 34 no. of apartments
Two heat pumps, district heating, DHW from four coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)80
28 Two heat pumps, district heating, DHW from four coil cylinders
Fig. 27
VW
2
EW
2
EW
1
Z1.CW
1
θ Z1.TW1
θ
Z1.VC
24
GW
42
Z1.VC
23
Z1.VA
41
GW
44
Z2.CW
2
θ GW
41
Z2.VA
42
Z2.VC
24Z2.V
C23
Z1.VL41
Z2.TW1
T0θV
C2
EC
1
CC
91FC
91V
L91
VA
21
EC
2
Z1.VB
32
Z1.VW
1
Z2.VW
1
CC
1
Z2.DC
21
Z2.VC
21
Z1.DC
21
PC
1D
C11
VC
12
VC
13
VC
11
GC
11V
C14 S
C11
VW
97
VL95
VW
96V
W95
FW41
TW2
DW
42 VW
42
VW
43P
W2
IW1
GW
43O
W1
VW
44V
W45
VW
41
θ TL1
θTC
2
DW
41
Z2.SC
1
Z1.SC
1
Z2.VB
32
Z2.DB
31
Z1.DB
31
Max
1 mZ1
θ
PC
0
PB
3
Z2
θ
θ
θ
Z2.FC1
TC0
PC
0
TB1
θTC
3
θθ
TB0
TB1
θ
Z1.FC1
TC0
θTC
3
FB32
CB
32G
B31
VB
31V
B32
VB
33
FB31
CB
31
Z2.CW
1
Z2.VA
41Z1.V
A42
Z1.VL42
Z1.CW
2
Z2.VL41
Z2.VA
41Z2.V
A42
Z1.VA
42Z1.V
A41
Z2.SB
31 θ
PB
3
TB0
Z2.VB
31
Z1.VB
31
Z1.SB
31
Two heat pumps, district heating, DHW from four coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 81
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filters Z1.SB31 and Z2.SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, district heating, DHW from four coil cylinders
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)82
District heatingOverviewPrimary valves for district heating water are controlled by the heat pump controller and an accessory module and is used as additional heat for both heating and potable hot water production.FunctionDistrict heating via VM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function). District heating via VW2 as-sists when CW1, which is heataed the heat pump, is unable to reach set DHW temperature or when the addition-al heat is cheaper than heat produced by the heat pump (Hybrid function).Control of district heating for additional heatActivation of additional heat via VM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the additional heat re-ceives starting permission, and the mixing valve control of VM0 begins, which then regulates T0 to set point. Dis-connection occurs when VM0 has closed and the degree minute calculation of the difference between the T0 ac-tual value and set point value reaches the preset number of degree minutes, and hybrid function for district heat-ing is not active.Control of district heating hybrid functionIf the calculated current energy cost for producing heat with the heat pump is higher than the current cost for dis-trict heating, the district heating valves then activates to regulate T0 to its set point, and the heat pump shuts down. When the cost of district heating increases above the price for energy produced by the heat pump, the heat pump restart, and the district heating valve close.Heating potable hot water production with district heatingIf the potable hot water temperature at TW2 drops below set point, the district heating valve VW2 immediately acti-vates, and start regulating TW2 to set point by opening VW2. This function is controlled by the accessory module RC-Multi.
Fresh water tankOverviewThe property also requires a small to medium amount of potable hot water, which is supplied by fresh water cylinder(s).FunctionThe fresh water tank is heated by the heat pump, the 3-step electrical heater on the heat pump flow, or integrated electrical heater (backup function).Fresh water tank (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceed the stop limit. In hot water mode the compressor starts and the 3-way valve VW1 is put in hot water position. The heat pump normally charges the fresh water tank with both comperssors, until the end of the charging cycle, when the compressor with most running hours are stopped. But it is possible to make a setting to limit DHW charging to one compressor only, if the DHW cylinder is small compared to the heat pump power. The speed of PC0 is controlled during the charging to ensure high charging temperatures during the start of the charging, and high flow at the end of the charging cycle, to ensure that the buffer is charged all the way to the bottom.Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water tank CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between GW41 and GW42 should be about 5K.
Thermal mixing valve MW41This valve is only needed on direct customer request; there are no functional or legal requirements for it. Temperature limitation is handled by the stop level on the charging temperature from the heat pump and backup heater.
DHW dimensioning
4x 7521)
1) Coil cylinder
4x 7541) 4x 7561)
2x G2542)
2) Heat pump size
80 80 801x G254 + 1x G2642) 105 105 1051x G254 + 1x G2722) 115 115 1152x G2642) 115 115 1151x G254 + 1x G2802) 120 120 1201x G264 + 1x G2722) 120 120 1202x G2722) 120 130 1301x G264 + 1x G2802) 120 130 1301x G272 + 1x G2802) 120 135 1352x G2802) 120 145 145
Table 35 no. of apartments
Two heat pumps, district heating, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 83
29 Two heat pumps, district heating, DHW from fresh water station
Fig. 28
θθ
Z1.TW1
Z1.VL92C
W1
Z1.VA
41
Z1.VC
24 VW
96
θ Z2.TW1 Z2.V
L92CW
2
Z2.VA
41
Z2.VC
23
Z2.SC
1
Z2.DC
21
Z1.SC
1
Z1.DC
21
Z1.VW
1Z1.V
C23
CC
1
θ
T0
VC
2E
C1
PC
1D
C11
VC
12
VC
13
VC
11
GC
11
CC
91FC
91V
L91
VA
21
VW
2
EW
1
TW8D
W42 V
W42
VW
43P
W2
IW1
OW
1
VW
44V
W45
VW
41
TL1
EW
2
EC
2V
C14 S
C11
Z2.VW
1
Z1.VB
35
Z2.VB
35
Z2.DB
31
Z1.DB
31 Z1.VC
22
Max
1 m
Z1.DC
21
Z1
θ
PC
0
PB
3
Z2
θθ θ
θ
FC1
TC0
PC
0
PB
3
TB0
TB1
VC
1θ
TC3
θθ
TB0
TB1
θ
FC1
TC0
VC
1θ
TC3
Z1.VC
23
Z2.VC
24
Z2.VC
23
Z1.VC
24
Z1.VC
23
Z1.VB
36
Z2.V
B36
FB32 C
B32 G
B31
SB
31
VB
31V
B32
VB
33
FB31
CB
31
θ TC2
EW
1 PC
4TW
4θ
VW
42
DC
42
VW
3
TW5
θ
VC
41θ
q
TW3
θ
TW2
GW
1
VW
46D
C43
FWS
Z2.V
C24
Z2.DC
23
Z2.DC
42
θθ TW
6
θTW
7
Z2.VW
2
Z1.VW
2
DW
41
Two heat pumps, district heating, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)84
General specificationsOverwiewThis system solution is intended for properties with one heating circuit.Maximum system temperature requirement is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. FunctionThe heat pump supplies the majority of the required heating. Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating system flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher temperature than T0Exercise operationAll circulation pumps, and the 3-way valves, runs for one minute if they have not been used for 7 days.Summer/Winter modeWinter mode is activated either immediately when TL1 drops below set temperature (7°C), or after 6 hours below 15°C (both settings adjustable) Summer mode is activated when TL1 has been above 17°C for more than 3 hours (both settings adjustableFilling of the heating systemAfter filling of heating water is performed via VW96 which must comply with EN 1717. After filling in this fashion, minimizes the amount of gas introduced into the heating system since it is vented largely through VL91 during filling or immediately after. After filling more than twice a year is indicative of a too small expansion vessel or leakage. Refilling of water may be required more frequently for a certain time after commissioning.De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 makes it function, together with the vent VL91, as a heating system vent.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank CC1 makes it function also as a sediment separator. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter is needed (SB11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connectiong the two heat pumps to the heating system gives a optimal range of system flow between the nominal flow of one heat pump to the total nominal flow of both heat pumps. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system becomes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Flow temperature sensors T0, TC1 and C2.T0For steel pipes these sensors must be of immersion type. For copper pipe it can be a contact sensor.
Mixed circuitOverviewTwo heating circuits, one of which requires more heat, e.g. radiators and the 2:nd e.g. floor heating.
FunctionThe (optional) heating circuit with lower temperature demand is controlled through an accessory (Multi-regulator) to which an external sensor, a mixing valve and a circulation pump are connected.Mixed heating circuit C1When using C1, accessories are required, including Multi-regulator, sensor C1.T0 and circulation pump C1.PC1. The flow set point value is calculated from the outdoor temperature TL1 and the heat curve for C1 Adjustments are made against flow temperature C1.T0 by controlling C1.VC1 to open against the buffer CC1 during a temperature drop. C1.PC1 can be set to be active in winter mode only or permanently.
55 – 80 kW heat pumpsOverwiewIn winter mode one of the Compressors in the heat pump (ER1 or ER2) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working heat pump is started (If at least one compressor in a heat pump is in working order), the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the current heat pump hysteresis. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPump control heat carrier pump PC0PC0 starts before start of the first compressor andruns for a while after the last compressor stops. PC0 is regulated to keep a constant temperature difference for TC3-TC0. PC2 can also be set to run at a fixed, preset speed. Pump control collector circuit pump PB3PC starts before the first compressor starts and runs for a while after the last compressor stops. PB3 is regulated against TB1. in order to keep a constant temperature difference TB0 - TB1 within the normal working interval. Outside normalcollector circuit temperatures, the temperature difference is adjusted to achieve optimal operation. Alternatively, a fixed speed can be set. PB3 brine pumpThe brine pump does not have to be a low energy pump according to ErP directive, but using a high energy pump for this high efficiency, twin compressor heat pump will significantly reduce system performance. In order to reach best performance and full operation range, PB3 must be a low energy, speed controlled pump, controlled by the heat pump controller via 0-10V.PC0 heating pumpAll pumps on the heating system must be low energy according to the ErP directive, in order to reach best performance, and full operation range. PC0 must be speed controlled by the heat pump controller via 0-10V.Cleaning of brine filters Z1.SB31 and Z2.SB31As SB 31 is not a filter ball, but just a filter, cleaning it requires a filling bin, as the filter, and also piping at the same level needs to be drained. Follow instruction in heat pump installation manual.De-airing of collector circuitWhen ethanol is used as antifreeze it is important that there are no automatic venting devices in the collector circuit since these will tend to vent the ethanol over time. Instead, there is a 4.5 liter plastic vessel CB31 where air gathers and is vented manually via FB34. When glycol is used as antifreeze, automatic vents with microbubble separators are required instead of CB31, and FB31 must be installed directly on the pipe
Two heat pumps, district heating, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 85
District heatingOverviewPrimary valves for district heating water are controlled by the heat pump controller and an accessory module and is used as additional heat for both heating and potable hot water production.FunctionDistrict heating via VM0 assists when the heat pump alone is unable to satisfy the heating demand or when the additional heat is cheaper than heat produced by the heat pump (Hybrid function). District heating via VW2 as-sists when CW1, which is heataed the heat pump, is unable to reach set DHW temperature or when the addition-al heat is cheaper than heat produced by the heat pump (Hybrid function).Control of district heating for additional heatActivation of additional heat via VM0 is performed with a degree minute calculator from the difference between actual value and set point value T0 - 3K. When the number of degree minutes is fulfilled, the additional heat re-ceives starting permission, and the mixing valve control of VM0 begins, which then regulates T0 to set point. Dis-connection occurs when VM0 has closed and the degree minute calculation of the difference between the T0 ac-tual value and set point value reaches the preset number of degree minutes, and hybrid function for district heat-ing is not active.Control of district heating hybrid functionIf the calculated current energy cost for producing heat with the heat pump is higher than the current cost for dis-trict heating, the district heating valves then activates to regulate T0 to its set point, and the heat pump shuts down. When the cost of district heating increases above the price for energy produced by the heat pump, the heat pump restart, and the district heating valve close.Heating potable hot water production with district heatingIf the potable hot water temperature at TW2 drops below set point, the district heating valve VW2 immediately acti-vates, and start regulating TW2 to set point by opening VW2. This function is controlled by the accessory module RC-Multi.
Fresh water stationOverviewThe property also requires a rather big amount of potable hot water, which is supplied by a fresh water station.FunctionThe fresh water station is heated by buffer cylinders, that is, in turn, heated by the heat pumps or district heating.The return from the fresh water station is either sent back to the after heating buffer CW1, or to the pre-heating buffer CW2, de-pending on the return temperature.Heating buffer CW1 (potable hot water production)The heat pump should be set to use a local hot water sensor. Hot water mode is activated when TW1 drops below the start temperature. Hot water mode ceases when TW1 and TC0 exceeds the stop limit. In hot water mode the compressor starts and the 3-way valves VW1 and VW2 is put in hot water position.Fresh water stationThe fresh water station maintains the potable hot water temperature TW4 to a constant value by collecting heat from CW1 using PW1 at the needed speed. At sudden changes in potable hot water flow,The flow sensor GW1 can influ nce the speed of PW1 before there has been a change in TW4 temperature. The heating water return temperature from the fresh water station can either be high, when there is almost only circulation heating, then VW3 sends the water back to Z2.CW1, but when the potable hot water flow increases, the return temperature will drop, and VW3 will change to send the water to pre-heating buffer Z1.CW1 for pre-heating.
Flow in the hot potable water circulationIn order to maintain the dimensioned capacity of the fresh water station and the buffer CW1, it is important that the flow in the hot water circulation is not too high That the maximum return of the heat pump is exceeded. The temperature difference between TW4 and TW6/GW41 should be about 5K.
DHW dimensioning, Heat pumps 2x 54 kW
DHW dimensioning, Heat pumps 2x 64 kW
DHW dimensioning, Heat pumps 2x 72 kW
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
85 -2x CW1 750 l and 1x CC1 750 l2) 95 952x CW1 750 l and 2x CC1 750 l2) 100 1053x CW1 750 l and 2x CC1 750 l2) 100 1153x CW1 750 l and 3x CC1 750 l2) 100 1204x CW1 750 l and 3x CC1 750 l2) 100 1304x CW1 750 l and 4x CC1 750 l2) 100 145
Table 36 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
100 1002x CW1 750 l and 1x CC1 750 l2) 100 1102x CW1 750 l and 2x CC1 750 l2) 100 1203x CW1 750 l and 2x CC1 750 l2) 100 1303x CW1 750 l and 3x CC1 750 l2) 100 1404x CW1 750 l and 3x CC1 750 l2) 100 1504x CW1 750 l and 4x CC1 750 l2) 100 165
Table 37 no. of apartments
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
100 1152x CW1 750 l and 1x CC1 750 l2) 100 1252x CW1 750 l and 2x CC1 750 l2) 100 1353x CW1 750 l and 2x CC1 750 l2) 100 1453x CW1 750 l and 3x CC1 750 l2) 100 1604x CW1 750 l and 3x CC1 750 l2) 100 1704x CW1 750 l and 4x CC1 750 l2) 100 185
Table 38 no. of apartments
Two heat pumps, district heating, DHW from fresh water station
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)86
DHW dimensioning, Heat pumps 2x 80 kW
FWS 1001)
1) Fresh water station
FWS 2001)
1x CW1 750 l and 1x CC1 750 l2)
2) No. of cylinders
100 1302x CW1 750 l and 1x CC1 750 l2) 100 1402x CW1 750 l and 2x CC1 750 l2) 100 1503x CW1 750 l and 2x CC1 750 l2) 100 1603x CW1 750 l and 3x CC1 750 l2) 100 1754x CW1 750 l and 3x CC1 750 l2) 100 1904x CW1 750 l and 4x CC1 750 l2) 100 205
Table 39 no. of apartments
Cascade, intermediate up to 5 heat pumps
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 87
30 Cascade, intermediate up to 5 heat pumps
Fig. 29
Z1.SC
1
Z1.VC
21
Z1.DC
21
PC
0FC
1
θ TL1
CC
2
PC
1V
C12
VC
11
GC
11
SC
11
VC
13V
C14
CC
91FC
91
θ
VL91
TC2
GC
91
θθ θ
θTC
0
PB
3
TB0
TB1
θTC
3Z1
θθ θ
θTC
0
TB0
TB1
θTC
3Z5
θθ θ
θTC
0
TB0
TB1
θTC
3Z4
θθ θ
θTC
0
TB0
TB1
θTC
3Z3
θθ θ
θTC
0
TB0
TB1
θTC
3Z2
CB
32G
B31
FB32
VB
31V
B32
VB
33
FB31
CB
31
Z1.SB
31
Z1.VB
32
Z1.DB
31
PB
3
Z2.VB
32
Z2.DB
31
PB
3
Z3.VB
32
Z3.DB
31
PB
3
Z4.VB
32
Z4.DB
31
PB
3
Z5.VB
32
Z5.DB
31
CC
1
VA
21
Z2.SC
1
PC
0
Z4.SC
1
PC
0
Z5.SC
1
PC
0
Z3.SC
1
PC
0
Z2.DC
21
FC1
Z3.DC
21
FC1
Z4.DC
21
FC1
Z5.DC
21
FC1
Z2.VC
21Z3.V
C21
Z4.VC
21Z5.V
C21
θT0
Z2.SB
31Z3.S
B31
Z4.SB
31Z5.S
B31
Z1.VB
31Z2.V
B31
Z3.VB
31Z4.V
B31
Z5.VB
31
VL92
6720817052-32 .2I
Cascade, intermediate up to 5 heat pumps
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)88
General specificationsOverwiewThis system solution is intended for properties with one heating circuit. Maximum system temperature require-ment is 80/60 (80° flow, 60° return) at the DOT (Dimensioning Outdoor Temperature) for the region where the properties is. The heat pumps are connected in two groups, for uneven numbers of heat pumps, the group to the right should have the highest number of heat pumps. The buffer cylinders are connected in parallel using the buffer cascade kit.Heat production from heat pump The set point value for the flow is calculated from the outdoor temperature TL1 and the heat curve. Adjustments are made against the flow temperature T0. The curve is calculated automatically from the basic settings. The customer has the option of adapting the heat curve at different outdoor temperatures. In case of low heating sys-tem flow, start and stop of compressors are done against buffer temperature TC2 in case it shows a higher tem-perature than T0De-airing of heating systemThe type and positioning in the system of the buffer tank CC1 and CC2 makes it function, together with the vent VL91, and VL92 as a heating system vent. In a system of this size, it is worth having an active expansion vessel system with de-airing function.Dirt separator for the heating systemThe type and positioning in the system of the buffer tank s CC1 and CC2 makes them function also as a sediment separator, but only giving full protection for the right heat pump group. Gathered sediment can be flushed out via VA21. But when a heat pump is installed in an existing heating system, a magnetite filter that also gathers non magnetic sediment is needed (SC11)Adjustment of heating system flowThe connecting mode according to this system solution works for any low-flow or high-flow system. This way of connecting the two heat pump groups to the heating system gives an optimal range of system flow between the nominal flow of one heat pump group to the total nominal flow of both heat pump groups. With the heat pumps in continuous operation, the temperature difference T0 – GC11 should be in the range between TC3-TC0 and two times the difference TC3-TC0. The flow can be adjusted primarily by adjusting the pressure height of the PC1 pumps respectively. However, a correct flow may have the consequence that only part of the heating system be-comes hot. This means that the distribution valves of the heating system needs adjusting (radiators/floor heating).Capacity controlIn winter mode one of the Compressors in the heat pump (ER1 to ER5) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working* heat pump is started, the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the cur-rent heat pump hysteresis. *If at least one compressor in a heat pump is in working order. Once stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpPotable hot water productionIn winter mode one of the Compressors in the heat pump (ER1 to ER5) starts when T0 falls below the preset temperature by the current heat pump hysteresis. When one step in each working* heat pump is started, the 2:nd compressor in each heat pump is allowed to start when T0 falls below the preset temperature by the cur-rent heat pump hysteresis. *If at least one compressor in a heat pump is in working order. Once
stopped, the respective compressor is blocked from restarting for 3 minutes. The hysteresis is floating and individual for each compressor. This means that the starting order of the heat pumps changes; the one with the longest non operating time will start first and the one with the longest operating time will stop first. But only when only one compressor in each heat pump is running, both compressors is allowed to be stopped in a heat pumpAdditional heatAdditional heat can be connected before the PC1 pumps, to be started by the heat pump control when the heat pumps alone can’t manage heating.
Capacity chart 54 kW
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 89
31 Capacity chart 54 kW
Fig. 30
54 kWFlow
temperature (°C
)
Flow rates of w
ater and brine were adjusted in the operating
condition 0/35, 0/45 to get ∆T=5°C and ∆ T=3°C
, for 0/55 and 0/65 to get ∆T=8°C and ∆T=3°C. C
irculation pumps are not included.
Values can differ ±5%
.
100,0
Heating output
80,0
35
60,0
Power (kW)
4555
40,0
P
65Supplied pow
er
20,0
0,00 1
50
5-
Temperature from
bore hole (°C)
6720817052-27.1I
Capacity chart 64 kW
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)90
32 Capacity chart 64 kW
Fig. 31
64 kWFlow
temperature (°C
)
Flow rates of w
ater and brine were adjusted in the operating
condition 0/35, 0/45 to get ∆T=5°C and ∆T=3°C
, for 0/55 and 0/65 to get ∆T=8°C and ∆T=3°C. C
irculation pumps are not included.
Values can differ ±5%
.
100,0
Heating output
80,0
35
60,0
Power (kW)
4555
40,0
P
65Supplied pow
er
20,0
0,001
50
5-
Temperature from
bore hole (°C)
6720817052-27.1I
Capacity chart 72 kW
Planning Guide 54-80 kW – 6 720 817 052 (2015/06) 91
33 Capacity chart 72 kW
Fig. 32
72 kWFlow
temperature (°C
)
Flow rates of w
ater and brine were adjusted in the operating
condition 0/35, 0/45 to get ∆T=5°C and ∆T=3°C
, for 0/55 and 0/65 to get ∆T=8°C and ∆T=3°C. C
irculation pumps are not included.
Values can differ ±5%
.
100,0
Heating output
80,0
35
60,0
Power (kW)
4555
40,0
P
65Supplied pow
er
20,0
0,001
50
5-
Temperature from
bore hole (°C)
6720817052-27.1I
6720817052-29.1I
Capacity chart 80 kW
Planning Guide 54-80 kW – 6 720 817 052 (2015/06)92
34 Capacity chart 80 kW
Fig. 33
80 kWFlow
rates of water and brine w
ere adjusted in the operating condition 0/35, 0/45 to get ∆T=5°C
and ∆ T=3°C, for 0/55 and
0/65 to get ∆ T=8°C and ∆T=3°C. C
irculation pumps are not included.
Values can differ ±5%
.
Flow tem
perature (°C)
100,0
80,0
35
Heating output
60,0
Power (kW)
4555
40,0
P
65Supplied pow
er
20,0
0,00 1
50
5-
Temperature from
bore hole (°C)
6720817052-30.1I
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