heat pump with rock, ground or lake as heat source.qm31 shut-off valve, heating medium supply qm32...

NIBE™ F1255 GROUND SOURCE HEAT PUMP

HEAT PUMP WITH ROCK, GROUND OR LAKE AS HEAT SOURCE.

NIBE F1255NIBE™ F1255 is a heat pump for heating small houses and smaller multi-occupancy houses. The heat pump automatically adjusts itself to the output requirement of the house during the year. When more heat and hot water is required, the output increases, when not so much is needed, it drops to a lower speed. This results in optimal savings as the heat pump always runs at the correct performance all year round. Both the low energy circulation pumps and the flexible hoses are integrated, and the brine circuit can be connected on either side. Particle filter supplied. The heat pump can be connected to an optional low temperature distribution system. e.g. radiators, convectors or under floor heating. F1255 is equipped with a 180 litre water heater, which is optimally insulated for minimal heat loss. An integrated 7 step 7 kW immersion heater connects automatically as necessary. (can be connected to a 4-step 9 kW immersion heater). F1255 is constructed on a robust frame with durable panels and effective soundproofing for the best possible comfort. All panels are easy to remove for easy access when installing and for any servicing.

• Optimalannualheatingfactorthankstotheinvertercontrolledcompressor.

• Minimaloperatingcosts,thecompressorincreases/decreasesspeedaccordingtotheprevailingheatingdemand.

• Softwarecontrolledcirculationpumpsthatsupplytheheatpumpandtheheatingsystemwithsuitableflow.

• ItalsogivesyoutheopportunitytocontrolcomfortinyourhomenomatterwhereyouarebyusingNIBEUplinkTM.

• Displayunitwithlargeandeasy-to-readcolourscreen(TFT).

–Userfriendlycontrolsystem.

–Iconsandtextforclearinformationaboutstatus,temperaturesandsettingsintheheatpump.

–indoorsensorincluded.

• Hightemperaturerange.

–Supplytemperature70°C

–Returntemperature58°C.

• Integratedclockwithrealtimefunctionforschedulingchangingofhotwaterandindoorhousetemperature.

• Preparedfor(withaccessory):

–Poolheating(POOL40)forbothpoolandspa.

–Controlofuptofourheatingsystems(ECS40/ECS41).

–StatusandsettingsviaNIBEUplinkTMorviaSMS(SMS40).

–Active/passivecoolingwithPCM42orHPAC40.

• Easytoremovethecoolingmodule.

2 NIBE F1255

INSTALLATION METHOD

RockThe heat pump collects a proportion of the rock’s stored solar energy via a collector in a bore hole in the rock.

Surface soil The heat pump obtains a proportion of the ground's stored solar energy via the buried ground collector.

Lake The heat pump obtains a proportion of the water’s stored solar energy via the lake collector that is anchored on the lake bed.

Sleeve pipe

Brine to heat pump

Ground water level

Active borehole (water column in

rock)

Brine from heat pump

NIBE F1255 3

HOW DOES F1155 WORK?

VVKVKBinVBf VBrKBut

Principle of operationF1255 consists of heat pump, water heater, electric heater, low energy circulation pumps and control system. F1255 is connected to the brine and heating medium circuits. The heat from the heat source (rock, soil, lake) is taken up via a closed brine system in which a mixture of water and antifreeze circulates. In some cases, the ground water can also be used as heat source. An intermediate heat exchanger should be used to protect the heat pump in such cases.

In the heat pump evaporator, the brine

(water mixed with anti-freeze, e.g. glycol or ethanol) releases its energy to the refrigerant, which is vaporised in order to be compressed in the compressor. The refrigerant, the temperature of which has now been raised, is passed to the condenser where it gives off its energy to the heating medium circuit and, if necessary, to any docked water heater. If there is a greater need for heating/hot water than the compressor can provide there is an integrated immersion heater.

Evaporator

Circulation pump

Heating medium

supply Brine in

Hot water Cold water

Water heater

Charge coil

Brine out

Heating medium return

Expansion valve

Shut off valves

Immersion

heater

Reversing

valve

Compressor

Brine pump

Condenser

Cooling module

4 NIBE F1255

R

0

+ 20-2

1

R

0

H M flo w4 9 (5 0 ) °CH o t w a te r 5 1 °C

+20

-2

1 R0

HM

flow4

9 (5

0) °C

Hot

wate

r51 °C

R0

Transport and storageF1255 should be transported and stored vertically in a dry place.

When being moved into a building, F1255 may be leant back 45°. Note! Can be tail heavy.

If the cooling module is pulled out and transported upright, F1255 can be transported on its back.

Assembly• Position the heat pump on a firm base, preferably on a concrete

floor or foundation. Use the heat pump’s adjustable feet to obtain a stable set-up.

• Install with its back to an outside wall, ideally in a room where noise does not matter, in order to eliminate noise problems. If this is not possible, avoid placing it against a wall behind a bedroom or other room where noise may be a problem.

• Wherever the unit is located, walls to sound sensitive rooms should be fitted with sound insulation.

• Route pipes so they are not fixed to an internal wall that backs on to a bedroom or living room.

Installation areaLeave a space of 800 mm in front of the heat pump. Approximately 50 mm free space is required in order to open the side hatches. The hatches do not need to be opened during service, all service on F1255 can be carried out from the front. Leave space between the heat pump and wall behind (and any routing of supply cables and pipes) to reduce the risk reproduction of any vibration. Drawing out the cooling module

To simplify transport and service, the heat pump can be separated by pulling the cooling module out from the cabinet.

See the installer manual for more comprehensive instructions about the separation.

GOOD TO KNOW ABOUT NIBE™ F1255

(50) (50)

800

LEK

Supplied components

LEK

LEK

LEK

Outdoor sensor Current sensor Indoor sensor Particle filter

LEK

LEK

Level vessel Safety valve 0.3 MPa (3 bar)

O-rings

LocationThe enclosed kit is located on the packaging for the heat pump.

NIBE F1255 5


Dimensions

620

600

560 440

70

1775

650*

25-

50

25

50

130210

390470525

650*

*This dimension applies at 90° angle on the brine pipes (side connection). The dimension can vary approx. ±100 mm in height as the brine pipes partially consist of flexible pipes.

6 NIBE F1255


Equipment

FD1

FA1

AA3

AA1 AA2

AA23

LEK

BT10

BT3

QM2

GP2

BT12

GP1

QM1

RF2

AA100

BT11

F1255

XL1 XL3XL4 XL2

XL6 XL7

QN10

BT7

SF1

AA4-XJ4

AA4-XJ3

W130

AA4

UB3

EB1

BT2

UB1

QM22

QM34

QM31

UB2

BT6

PF2

QM32

QM33

PF1

PF3

NIBE F1255 7


Pipe connections

XL1 Connection, heating medium supply

XL2 Connection, heating medium return

XL3 Connection, cold water

XL4 Connection, hot water

XL6 Connection, brine in

XL7 Connection, brine out

HVAC components

GP1 Circulation pump

GP2 Brine pump

QM1 Drainage, climate system

QM2 Draining, brine side

QM22 Venting valve, coil

QM31 Shut-off valve, heating medium supply

QM32 Shut off valve, heating medium return

QM33 Shut off valve, brine out

QM34 Shut-off valve, brine in

QN10 Reversing valve, climate system/water heater

Sensors etc.

BT2 Temperature sensor, heating medium supply

BT3 Temperature sensor, heating medium return

BT6 Temperature sensor, hot water charging

BT7 Temperature sensor hot water top

BT10 Temperature sensor, brine in

BT11 Temperature sensor, brine out

BT12 Temperature sensor, condenser supply line

Electrical components

AA1 Immersion heater card

AA2 Base card

AA3 Input circuit board

AA4 Display unit

AA4-XJ3 USB port

AA4-XJ4 Service socket (no function)

AA23 Communication board

AA100 Joint card

EB1 Immersion heater

FA1 Miniature circuit-breaker

FD1 Temperature limiter/Emergency mode thermostat

RF2 EMC-filter

SF1 Switch

W130 Network cable for NIBE Uplink™

Miscellaneous

PF1 Rating plate

PF2 Type plate, cooling section

PF3 Serial number plate

UB1 Cable gland, incoming electricity

UB2 Cable grommet

UB3 Cable gland, rear side, sensor

Designations in component locations according to standard IEC 81346-1 and

81346-2.

8 NIBE F1255

0

10

20

30

40

50

60

70

80

90

0 0,05 0,1 0,15 0,2 0,25 0,3 0,35 0,4 0,45 0,5

Eleffekt, WTillgängligt tryck, kPa

Eleffekt

Tillgängligt tryck

Flöde

l/s

P

P100%

100%P60%

P40%

P80%

80%60%

40%


Pump capacity diagramHeating medium side

The pump is adjustable, the flow can be adjusted in menu 5.1.11.

LEK

GP1

Available pressure, kPaElectrical output, W

0

10

20

30

40

50

60

70

80

0 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45

0

10

20

30

40

50

60

70

80

0 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45

0

10

20

30

40

50

60

70

80

0 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45

0

10

20

30

40

50

60

70

80

0 0,10 0,20 0,300,05 0,15 0,25 0,35 0,40

0

10

20

30

40

50

60

70

80

90

0 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45 0,50


EleffektTillgängligt tryck

Flödel/s


Flödel/s

P

P100%

100%P60%

P40%

P80%

80%60%

40%


P

F1145/F1245 5kW

F1145/F1245 6kW


Flödel/s


P

F1145/F1245 10kW


Flödel/s


P

F1145/F1245 8 & 12kW


Flödel/s


P

F1145/F1245 15 & 17kW

P100%

100%

P60%P40%

P80%

80%

60%40%

P100%

100%

P60%

P40%

P80%80%

60%

40%

P100%

100%

P60%

P40%

P80%

80%60%

40%

P100%

100%

P60%

P40%

P80%

80%

60%40%

Available pressure

Electrical output

Flow

Automatic operationTo set the correct flow in the climate system the correct speed must be set for the heating medium pump. This heat pump has a heating medium pump that can automatically controlled. This automatic control occurs when the compressor is running and automatically sets the speed of the heating medium pump, for the present operating mode, to obtain the optimal temperature difference between the supply and return lines.

Manual operation

NIBE F1255 9

0

20

40

60

80

100

120

140

160

180

200

0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8

Tillgängligt tryck, kPa / Eleffekt, W

Eleffekt

Tillgängligt tryck

Flöde

l/s

P

P100%

100%

P80%

80%

P60%

60%P40%40%


Pump capacity diagramBrine side

LEK

GP2

The pump is adjustable, the flow can be adjusted in menu 5.1.9.

Flow

Available pressure, kPaElectrical output, W

0

10

20

30

40

50

60

70

80

0 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45

0

10

20

30

40

50

60

70

80

0 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45

0

10

20

30

40

50

60

70

80

0 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45

0

10

20

30

40

50

60

70

80

0 0,10 0,20 0,300,05 0,15 0,25 0,35 0,40

0

10

20

30

40

50

60

70

80

90

0 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45 0,50



Flödel/s


Flödel/s

P

P100%

100%P60%

P40%

P80%

80%60%

40%


P

F1145/F1245 5kW

F1145/F1245 6kW


Flödel/s


P

F1145/F1245 10kW


Flödel/s


P

F1145/F1245 8 & 12kW


Flödel/s


P

F1145/F1245 15 & 17kW

P100%

100%

P60%P40%

P80%

80%

60%40%

P100%

100%

P60%

P40%

P80%80%

60%

40%

P100%

100%

P60%

P40%

P80%

80%60%

40%

P100%

100%

P60%

P40%

P80%

80%

60%40%

Available pressure

Electrical output

Automatic operationTo set the correct flow in the brine system the correct speed must be set for the brine pump. This heat pump has a brine pump that can automatically controlled. This automatic control occurs when the compressor is running and automatically sets the speed of the brine pump for the optimal temperature differ-ence between the supply and return lines.

Manual operation

10 NIBE F1255

F1255

THE DISPLAY

Display unit

Display, A

Instructions, settings and operational information are shown on the display. The easy-to-read display and menu system, facilitates navigation between the different menus and options to set the comfort or obtain the information you require.

Status lamp, B

The status lamp indicates the status of the heat pump. It:

• lightsgreenduringnormaloperation.

• lightsyellowinemergencymode.

• lightsredintheeventofadeployedalarm.

OK button, C

The OK button is used to:

• confirmselectionsofsubmenus/options/setvalues/pageinthestartguide.

Back button, D

The back button is used to:

• gobacktothepreviousmenu.

• changeasettingthathasnotbeenconfirmed. B Status lamp

A Display

C OK button

D Back button

E Control knob

F Switch

Control knob, E

The control knob can be turned to the right or left. You can:

• scrollinmenusandbetweenoptions.

• increaseanddecreasethevalues.

• changepageinmultiplepageinstructions(forexamplehelptextandserviceinfo).

Switch, F

The switch assumes three positions:

• On( )

• Standby( )

• Emergencymode( )

A large, easy to rad multicoulour display gives everyone the chance to maximize the energy saving potential of this exciting green technology!

INDOOR CLIMATE HOT WATER

HEAT PUMP

NIBE F1255 11

THE DISPLAY

Menu system When the door to the heat pump is opened, the menu system’s four main menus are shown in the display as well as certain basic information.

Menu 1 – Indoor climate

Setting and scheduling the indoor climate.

Menu 2 – Hot water

Setting and scheduling hot water production.

This menu only appears if a water heater is docked to the heat pump.

Menu 3 - Info

Display of temperature and other operating information and access to the alarm log.

Menu 4 – Heat pump

Setting time, date, language, display, operating mode etc.

Menu 5 - Service

Advanced settings. These settings are not available to the user. The menu is visible by pressing the Back button for 7 seconds.

Start guideThe first time the heat pump is started a start guide is started. The start guide instructions state what needs to carried out at the first start together with a run through of the heat pump’s basic settings.

The start guide ensures that the start-up is carried out correctly and cannot be bypassed. The start guide can be started later in menu 5.7.

Indoor temperature - (if a room sensor is connected)

Outdoor temp.Hot water temp.

Extra hot water (if activated)

Estimated amount of hot water

If the start guide is left on this page it closes automatically in 58 min

12 NIBE F1255

INSTALLATION

PipeinstallationPipe installation must be carried out in accordance with current norms and directives. F1255 can operate with a return temperature of up to 58 °C and an outgoing temperature from the heat pump of 70 °C (65 °C with only the compressor).

F1255 is not equipped with shut off valves; these must be installed outside the heat pump to facilitate any future servicing.

Pipe connection (cooling medium)Insulate all indoor brine pipes against condensation.

The level vessel must be installed as the highest point in the brine system on the incoming pipe before the brine pump (Alt. 1). If the level vessel cannot be placed at the highest point an expansion vessel must be used (Alt. 2).

Details of the antifreeze used must be shown on the level vessel.

Install the supplied safety valve under the level vessel as illustrated. The entire length of the overflow water pipe from the safety valves must be inclined to prevent water pockets and must also be frost proof.

Install shut off valves as close to the heat pump as possible.

Fit the supplied particle filter on the incoming brine pipe.

In the case of connection to an open groundwater system, an intermediate frost-protected circuit must be provided, because of the risk of dirt and freezing in the evaporator. This requires an extra heat exchanger.

Side connection

It is possible to angle the brine connections, for connection to the side instead of top connection.

To angle out a connection:

1. Disconnect the pipe at the top connection.

2. Angle the pipe in the desired direction.

3. If necessary, cut the pipe to the desired length.

Pipe connection (heating medium)Connecting the climate system

A climate system is a system that regulates indoor comfort with the help of the control system in F1255 and for example radiators, underfloor heating/cooling, fan convectors etc.

• Installallrequiredsafetydevices,shut-offvalves(asclosetotheheatpumpaspossible),andparticlefilter.

• Thesafetyvalvemusthaveamaximum2.5baropeningpressureandbeinstalledontheoutgoingheatingmediumasillustrated.Theentirelengthoftheoverflowwaterpipefromthesafetyvalvesmustbeinclinedtopreventwaterpocketsandmustalsobefrostproof.

• Whenconnectingtoasystemwiththermostatsonallradiators,areliefvalvemustbefitted,orsomeofthethermostatsmustberemovedtoensuresufficientflow.

Note! Note that condensation may drip from the level vessel. Position the vessel so that this does not harm other equipment.

P

P

Alt. 1 Alt. 2

Collector

XL7

XL6

NIBE F1255 13

INSTALLATION

Ventilation recoveryThe installation can be supplemented with the exhaust air module NIBE FLM to provide ventilation recovery.

Pipes and other cold surfaces must be insulated with diffusion-proof material to prevent condensation.

The brine system must be supplied with a pressure expansion vessel. If there is already a level vessel installed this should be replaced.

PoolThe installation can be supplemented with accessory POOL 40, to provide pool and spa heating. If pool is installed, the collector must be dimensioned after this.

Pipe connections (hot waterheater)• Anydockedhotwaterheatermustbefittedwithnecessary

setofvalves.

• Themixingvalvemustbeinstalledifthesettingischangedsothatthetemperaturecanexceed60°C.Thesettingismadeinmenu5.1.1.

• Thesafetyvalvemusthaveamaximum9.0baropeningpressureandbeinstalledontheincomingdomesticwaterlineasillustrated.Theentirelengthoftheoverflowwaterpipefromthesafetyvalvesmustbeinclinedtopreventwaterpocketsandmustalsobefrostproof.

T

Frånluft Ø 160

Avluft Ø 160

P

Extract airExhaust

air

T

Pool

14 NIBE F1255

INSTALLATION

Two or more climate systemsThe unit can be supplemented with accessory ECS 40/ECS 41 for control of two or more climate systems at different temperatures, e.g. under floor heating and radiator system.

Free cooling The installation can be supplemented with fan convectors, for example, in order to allow connections for free cooling (PCS 44).

• Pipesandothercoldsurfacesmustbeinsulatedwithdiffusion-proofmaterialtopreventcondensation.

• Wherethecoolingdemandishigh,fanconvectorswithdriptraysanddrainconnectionareneeded.

• Thebrinesystemmustbesuppliedwithapressureexpansionvessel.Ifthereisalreadyalevelvesselinstalledthisshouldbereplaced.

T

P

Fläktkonvektor

3

2

1

NIBE F1255 15

INSTALLATION

Inspection of the installationCurrent regulations require the heating installation to be inspected before it is commissioned. The inspection must be carried out by a suitably qualified person and should be documented. The above applies to closed heating systems. If the heat pump is replaced, the installation must be inspected again.

Guideline values for collectorsThe length of the collector hose varies depending on the rock/soil conditions, climate zone and on the climate system (radiators or underfloor heating).

Max length per collector should not exceed 400 m.

In those cases where it is necessary to have several collectors, these should be connected in parallel with the possibility of adjusting the flow of the relevant coil.

For surface soil heat, the hose should be buried at a depth of about 1 metre and the distance between the hoses should be at least 1 metres.

For several bore holes, the distance between the holes must be at least 15 metres.

Ensure the collector hose rises constantly towards the heat pump to avoid air pockets. If this is not possible, air vents should be used.

As the temperature of the brine system can fall below 0 °C it must be protected against freezing down to -15 °C. One litre of ready mixed brine per meter of collector hose (applies when using PEM-hose 40 x 2.4 PN 6.3) is used as a guide value when making the volume calculation.

Control, generalThe indoor temperature depends on several factors. Sunlight and heat emissions from people and household machines are normally sufficient to keep the house warm during the warmer parts of the year. When it gets colder outside, the climate system must be started. The colder it is outside, the warmer radiators and floor heating system must be.

The heat pump is controlled by built-in sensors for flow and return brine temperatures (collector). Brine return temperatures can, if so required, be limited to a minimum (e.g. for ground water systems).

Control of the heat production is performed based on the “floating condensing” principle, i.e. the temperature level needed for heating at a specific outdoor temperature is produced guided by collected values from the outdoor and flow sensors. The room temperature sensor can also be used to compensate the deviation in room temperature.

16 NIBE F1255

INSTALLATION

Additional heat onlyF1255 can be used exclusively as an additional heater (max. 9 kW), to produce heat and hot water, for example before the collector installation is complete.

Brine pumpThe brine pump normally follows the operation of the heat pump. There is a special operating mode for continuous operation for 10 days, followed by return to normal mode (this may be used before stable circulation has been established).

Alarm indicationsThe status lamp lights red in the event of an alarm and the display shows detailed information depending on the fault. An alarm log is created with each alarm containing a number of temperatures, times and the status of outputs.

Own curveF1255 has pre-programmed non linear heating curves. It is also possible to create an own defined curve. This is an individual linear curve with one break point. You select a break point and the associated temperatures.

Under floor dryingF1255 has an integrated floor drying function. This allows for controlled drying of a concrete slab. It is possible to create your own program and to follow a pre-programmed time and temperature schedule.

Heat productionThe supply of heat to the house is regulated in accordance with the chosen setting of the regulating curve (curve slope and offset). After adjustment, the correct amount of heat for the outside temperature is supplied. The flow line temperature of the heat pump will hunt around the theoretically required value. For subnormal temperatures the control system calculates a heating deficit in the form of “degree-minutes”, which means that heating production is accelerated. The larger the subnormal temperature, the greater the heat production.

The heat pump’s control system can control an installed external oil-fired boiler and mixing valve (requires accessory card AXC40).

Hot water productionIf the water heater is docked to F1255 when there is a demand for hot water, the heat pump gives this priority and devotes its entire output to water heating. No room heat is produced in this mode. Maximum time for hot water charging can be adjusted in the menu system. After this, heating is produced for the remaining period of time before further water heating can take place.

Hot water charging starts when the hot water sensor has fallen to the set start temperature. Hot water charging stops when the hot water temperature on the hot water sensor (BT6) has been reached.

For occasional higher demand for hot water, the “temporary lux” can be used to raise the temperature for 3 – 12 hours (selected in the menu system).

Prioritised additional heatF1255 has a function called prioritised additional heat. This means that if the system contains a wood boiler or solar heat system for example, these can be used together with F1255.

Circulation pumpF1255 has a heating medium pump that automatically controls the speed to achieve the optimal operating conditions for both hot water and heat production.

NIBE F1255 17

INSTALLATION

LEK

USB service outletF1255 is equipped with a USB socket in the display unit. This USB socket can be used to connect a USB memory to update the software, save logged information and handle the settings in F1255.

NIBE UplinkTM

Using the Internet and NIBE UplinkTM, you as a user can get a quick overview and the present status of the installation and the heating in your home. You get a good overall view where you can follow and control the heating and hot water comfort. If your system is affected by an operational disturbance, you receive an alert via e-mail that allows you to react quickly.

NIBE UplinkTM also gives you the opportunity to easily control the comfort in your home no matter where you are.

Range of services

Via NIBE UplinkTM you have access to different levels of service. A basic level that is free and a premium level where you can select different extended service functions for a fixed annual subscription fee (the subscription fee varies depending on the selected functions). Installation and associated equipment requirements. For NIBE UplinkTM to work with the installation, the following is required:

• Network cable Cat.5e UTP (straight, male-male), wired

network communication.

• Internet connection (broadband).

• A web browser that supports JavaScript. If Internet Explorer is used, it must be version 7 or higher. See the help file in the web browser for information about how to activate JavaScript.

SMS 40

F1255 can be controlled and monitored externally with accessory SMS 40.

SMS 40 consists of a communication module, a GSM modem

with antenna and a separate power supply unit with jack for plugging into a wall socket. The antenna can be placed outside the enclosure. SMS 40 enables operation to be controlled and monitored, via a GSM module, using a mobile phone via SMS messages or a mobile application (requires mobile phone

with Android operating system). For the GSM function to work, the communications module must be equipped with a valid GSM subscription. This may, for example, be a pay as you go card or a special telematics subscription.

For further presentation, visit www.nibe.eu

18 NIBE F1255

TECHNICAL SPECIFICATIONSIP 21

3x400V 4 - 16 kWOutput data at nom flow Refers to performance of the heat pump without circulation pumps

0/35Specified output kW 9,27

Electrical output kW 1,81

COP 5,12



COP 3,59

Output data according to EN 14511:2011 nominal (50Hz)0/35Specified output kW 8,89


COP 4,85



COP 3,77



COP 6,11



COP 4,72

SCOP according to EN 14825 Cold climateSCOP 0/35, Pdesign 12 kW 5,5

SCOP 0/55, Pdesign 12 kW 4,1



Additional power kW1/2/3/4/5/6/7

(switchable to 2/4/6/9)

Electrical dataRated voltage 400V 3NAC 50 HzMax operating current, compressor, Incl. Control system, Circ.Pumps & 0 kW immersion heater, (Recommended Fuse Rating)

Arms 10(10)

Max operating current heat pump including 1 kW immersion heater (Recommended Fuse Rating) Arms 13(16)

Max operating current heat pump including 2 - 4 kW immersion heater (Recommended Fuse Rating) Arms 17(20)



Max operating current heat pump including 7 kW immersion heater, connected upon delivery (Recommended Fuse Rating)

Arms 21(25)

Max operating current heat pump including 9 kW immersion heater, requires reconnection (Recommended Fuse Rating)

Arms 24(25)

Short circuit power (Ssc)¹) MVA 2,2

Power, B pump W 20 - 180

NIBE F1255 19

TECHNICAL SPECIFICATIONS

1) This equipment meets IEC 61000-3-12 on the condition that short circuit power Ssc is greater than or equal to Ssc at the connection point between the customer installation electrical supply and the mains network. It is the responsibility of the installer or user to ensure, through consultation with the distribution network operator if required, that the equipment is only connected to a supply with a short circuit power Ssc equal to or greater than Ssc.

2) With feet dismantled the height is approx. 1930 mm.

3x400V 4 - 16 kWPower, HM pump W 10-87

IP class IP 21

Refrigerant circuitType of refrigerant R407C

Volume kg 2,2

Cut-out value pressostat HP MPa 3.2 (32bar)

Difference pressostat HP MPa -0.7 (-7bar)

Cut-out value pressostat LP MPa 0.15 (1.5bar)

Difference pressostat LP MPa 0.15 (1.5bar)

Brine circuitEnergy class Brine pump low energy

Max system pressure brine MPa 0.45 (4.5bar)

Nominal flow l/s 0,51

Max external avail. press at nominal flow kPa 95

Max/Min incoming Brine temp °C see diagram

Min. outgoing brine temp. °C -12

Heating medium circuitEnergy class circ-pump low energy

Max system pressure heating medium MPa 0.45 (4.5bar)

Nominal flow l/s 0,22

Max external avail. press at nominal flow kPa 71

Max/Min heating medium temp °C see diagram

Sound power level (LWA) acc. to EN 12102 at 0 - 35 dB(A) 36 - 47

Sound pressure level (LPA) calculated values according to EN ISO 11203 at 0/35 and 1m range dB(A) 21 - 32

Pipe connectionsBrine ext diam. CU pipe mm 28

Heating medium ext diam., CU pipes mm 28

Hot water connection external diam mm 22

Cold water connection external diam mm 22

Water heaterVolume water heater l 180

Max pressure in water heater MPa 1.0 (10 bar)

Capacity hot water heating (comfort mode Normal) acc. to EN 16147

Amount of hot water (40 ºC) 240

COP DHW (tap profile XL) 2,7

Dimensions and weightWidth mm 600

Depth mm 620

Height mm 1800

Required ceiling height 2) mm 1950

Weight complete heat pump kg 245

Weight only cooling module kg 125

Part number, 3x400V, Enamel (for Germany, Switzerland and Austria only) 065 258

Part number, 3x400V, Enamel 065 239

Part number, 3x400V, Stainless 065 257

20 NIBE F1255

TECHNICAL SPECIFICATIONS

Working range, compressor operation

The compressor provides a supply temperature up to 65 °C, the reminder (up to 70 °C) is obtained using the additional heat.

Water temperature

Brine in, temperature

0

10

20

30

40

50

60

70

-15 -10 -5 0 5 10 15 20 25 30 35

°CVattentemperatur

°CKöldbärare in, temperatur

Framledning

Returledning

Flow line

Return lineBrine in, temperature

0

10

20

30

40

50

60

70

-15 -10 -5 0 5 10 15 20 25 30 35

°CVattentemperatur

°CKöldbärare in, temperatur

Framledning

Returledning30

25

20

15

5

10

00-5-10 15105 2520

0 15105 302520

0 15105 302520

25

20

15

5

10

0

25

20

15

5

10

0

Värmedrift

Kyldrift, 35 °C

Kyldrift, 50 °C

100 %

50 %

1 %

100 %

50 %

1 %

100 %

50 %

1 %

Use this diagram to dimension the heat pump (during cooling opera-tion) and during pool heating. The percentages show approximate compressor speed.

Dimensioning compressor speed

Specified heating output

kW

ACCESSORIES

LEK

LEK

LEK

LEK

LEK LE

K

LEK

LEK LEK

LEK

PCM 42 Combine your heat pump

with NIBE PCM for passive / free cooling.

HPAC 40 Climate exchange module for 2-pipe active and pas-

sive cooling.

LEK

LEK

LEK

LEK

LEK

LEK

LEK

LEK

LEK

LE

K

NIBE F1255 21

Base extension EF 45

Used, for example, when the pipes for the heat pump come up out of the floor or if the heat pump and

water heater should be at the same height.

Communication module MODBUS 40

MODBUS 40 enables F1255 to be controlled and monitored using a

DUC in the building. Communication takes place using a MODBUS-RTU.

Exhaust air module FLM

FLM is an exhaust air module specially designed to combine

recovery of mechanical exhaust air with an energy collector in

rock/ground heat.

Extra shunt group ECS 40/41

This accessory is used when F1255 is installed in houses with

two or more different climate systems that require different

supply temperatures, for exam-ple, in cases where the house

has both a radiator system and under floor heating system.

Pool heating POOL 40

POOL 40 is an accessory that enables pool heating

with F1255.

Passive cooling PCS 44

This accessory is used when the heat pump is

also to be used for cooling as well as heating.

Communication module SMS 40

SMS 40 enables operation and monitoring of F1255 via a GSM module, using a mobile phone

via SMS messages. If the mobile telephone also has the Android

operating system the ”NIBE Mobile App” can be used.

Accessory card AXC 40

An accessory card is re-quired if step controlled ad-dition (e.g. external electric boiler) or if shunt controlled addition (e.g. wood/oil/gas/pellet boiler) is to be con-

nected to F1255. An acces-sory card is also required if the ground water pump or external circulation pump is connected to F1255 at the same time that the buzzer

alarm is activated.

Room unit RMU 40

RMU 40 means that control and monitoring of the heat pump can be carried out in a different part of the

accommodation to where F1255 is located.

Filling valve kit Brine G32 (max 30 kW)

Filling valve kit for fill-ing brine in the collector

hose for rock heat pumps. Includes dirt filter and

insulation.

SOLAR 40/42

Solar 40/42 means that F1255 (together with VPBS or VPAS) can be connected

to solar heating.

SOLAR 40, (intended for VPAS, reversing valve

included)

SOLAR 42, (intended for VPBS)

NIBE Energy Systems ABBox 14285 21 MarkarydSWEDENTel. +46 433 - 73 000www.nibe.eu 63

9589

Tec

hnic

al P

BD G

B N

IBE

F125

5 14

33-1

MILJÖMÄRKT

307–005

This brochure is a publication from NIBE. All product illustrations, facts and specifications are based on current information at the time of the publication’s approval. NIBE makes reservations for any factual or printing errors in this brochure.Photos: www.benfoto.se.©NIBE2014.

NIBE is ISO-certified: SS-EN ISO 9001:2000SS-EN ISO 14001:2004

heat pump with rock, ground or lake as heat source.qm31 shut-off valve, heating medium supply qm32...

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