heat pumps planning file 2012

7/21/2019 Heat Pumps Planning File 2012

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2012 | inTErnaTional

TEcHnical GuidE

HEaT pumps

dHw rEnEwablEs klima cEnTral HEaTinG


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EnGinEErinG and insTallaTion

Issue 2012

Reprinting or duplication, even partially, only with our express permission.

STIEBEL ELTRON GmbH & Co. KG, D-37603 Holzminden

Legal note

In spite of the care taken in the production of this technical guide, no guarantee can be given regarding the accuracy of its con-

tents. Information concerning equipment levels and specification are subject to modification. The equipment features described

in this technical guide are not binding properties of our products. Due to our policy of ongoing improvement, some features may

have subsequently been changed or even removed. Our advisors will be happy to consult with you regarding the currently appli-

cable equipment features. Pictorial illustrations in this technical guide only represent sample applications. The illustrations also

contain installation components, accessories and special equipment, which is not part of the standard delivery.

Specification

Dimensions in the diagrams are in millimetres unless stated otherwise. Pressure figures may be stated in pascals (MPa, hPa, kPa)

or in bars (bar, mbar). The details of threaded connections are given in accordance with ISO 228. Fuse/MCB types and ratings com-

ply with the VDE regulations that apply in Germany. Output details apply to new appliances with clean heat exchangers.


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indExsysTEm EnGinEErinG

Introduction 8Heat pump function 9

Energy sources and operating modes 10

Mono mode 12

Dual mode - parallel 12

Mono energetic 12

Dual mode - alternative 13

Dual mode, partially parallel 13System example 14

System design 15

Design information 15

Terminology and descriptions 16

Summary of formulae 17

Heating water quality 18

Flow temperatures 21Hydraulic connection into the heat consumer system 22

Heat pumps with buffer cylinder 23

Heat pumps without buffer cylinder 24

DHW heating 25

Freshwater module 26

Charging station 26


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indExsysTEm EnGinEErinG | HEaT pump producT caTaloGuE

Air | water heat pumps - external installation 49Acoustic emissions 50

Condensate drain 54

Air | water heat pumps - internal installation 55

Air routing 56

Condensate drain 57

Engineering checklist for air | water heat pumps 58

Air | water heat pumps 60Air | water heat pumps - product overview 60

Appliance types and applications 61

WPL 5 N plus 64

WPL 10 ACS 72

HSBB 10 AC 80

WPL 10 A 82

WPL 10 I 83WPL 10 iK 84

WPL 13/20 basic 96

WPL E cool - external installation 104

WPL E cool - internal installation 105

WPL E cool - internal installation, compact 106

WPL 33 - external installation 122


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indExHEaT pump producT caTaloGuE

DHW heat pumps 234Appliance types and applications 235

Condensate drain for internal installation 236

Condensate drain for external installation 237

Integrating a solar thermal system or a gas/oil boiler 238

WWK 300 240

WWK 300 SOL 241

WWK 300 PV 242WWK 300 P10 243

WWK 300 P10 SOL 244

WWP 300 / WWP 300 HK 250

WWK 300 A/ AH/AP/AHP/GP 256

Accelera 300 262


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indExaccEssoriEs producT caTaloGuE

Control technology 270Heat pump manager 270

Remote control units and sensors 276

Communication and data transmission 277

Heat meter 278

Area heating control systems 279

System hydraulics 282

Low loss headers 282Buffer cylinder 284

Circulation pumps for compact installations 301

Circulation pumps for DHW heating 303

Pump assemblies 304

Pressure hoses 305

Anti-vibration mounts and diverter valves 306

Threaded immersion heater 307Brine circuit accessories 308

Brine sets 308

Brine filling unit 308

Brine circulation pumps 310

Brine distributor 311

Heat transfer medium | brine pressure switch 312


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indExaccEssoriEs producT caTaloGuE | sTandard circuiTs

DHW heating 326DHW cylinders 326

Thermal insulation for instantaneous water heater cylinders 352

Thermal insulation for DHW cylinders 352

DHW primary modules 354

Freshwater modules 356

Plate heat exchanger 358

Replacement convectors 360Replacement convectors 360

Heating mixing valve 368

Heating water treatment 370

Softening fitting 370

DHW heat pump accessories 371

Standard circuits 373

WPC mono mode without buffer cylinder 374WPC mono mode without buffer cylinder 375

WPC mono mode with 100 l buffer cylinder and DHW heating 376

WPC mono mode with 100 l buffer cylinder and DHW heating 377

WPC mono mode with low loss header and DHW heating 378

WPC mono mode with low loss header and DHW heating 379

WPF E mono mode without buffer cylinder and with DHW heating 380


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Advanced heat pumps save energy andreduce emissions

Heat is a fundamental human need.

Many people today not only consider

economy when they think of heating,

but also consider the environmental

impact. That both can be combined

effectively is shown by the develop-

ment of the heat pump. This utilisesthe energy held in the air, water and

under ground and converts it into use-

ful heating energy. The positive aspect

of this type of harvesting available

heat is that you can draw deep without

damaging the environment.

The heat pump is regulated sub-

ject to the outside temperature. The

control unit safeguards the selected

set temperature. As a result, the heat

pump achieves an excellent quotient of

harvested heat to expended primary

energy. To put it into figures:

1 kWh of electrical energy can be

used to extract up to 5 kWh available

Futureproof solutions

Much time and care has been invested

in recent decades in the development

of our heat pumps. This has created

a reliable, standard technology that

delivers every conceivable convenience.

Our heat pumps satisfy the widest

range of requirements in the heating

technology sector - conveniently andeconomically. Our heat pumps are

part of an extensive range of systems,

the predominant aim of which is to

translate our claim to high quality into

futureproof, alternative technologies

that are environmentally sound. As one

of the most notable manufacturers of

products in the heating, ventilation, air

conditioning and domestic hot waterequipment sector, we feel a great sense

of responsibility for our environment.

For that reason will we continue to ad-

here to our commitment to this sector.

Exclusive technology - hot waterincluded

Hot water and cosy living are our busi-

ness. You can also safeguard your do-

mestic hot water supply with our DHW

cylinders. Or have you ever considered

separating your hot water heating

from your existing heating system?

For a high DHW demand you could,for example in commercial operations,

also use our heat pumps exclusively for

heating domestic hot water, irrespec-

tive of whether you want to provide

a centralised or decentralised supply.

We offer a complete range of energy-

efficient electric appliances.

HEaT pumps proTEcT our EnErGy rEsErvEs


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Heat pump principle

The most important contribution to the

heat pump function is made by the re-

frigerant (in the following also referred

to as process medium). This evapo-

rates at the lowest temperatures.

If you route outdoor air or water via a

heat exchanger (evaporator), in which

the process medium [refrigerant] cir-culates, then that extracts the required

evaporation heat from the heat source

and changes from a liquid into a gase-

ous state.

During this process, the heat source

cools down by a few degrees.

A compressor draws the gaseous proc-

ess medium in and compresses it. Theincrease in pressure also raises the

temperature; in other words, the proc-

ess medium is pumped to a higher

temperature level.

This requires electrical energy. As the

compressor is of the suction gas-cooled

design this energy (motor heat) is not

HEaT pump funcTion

Main layout, heat pump refrigeration circuit

43

2 12

5

911

10

7

8

1 6

26_03

_01

_0359

1 Environmental energy

2 Evaporator

3 Suction line, gaseous process medium, lowpressure

4 Compressor

5 Pressure line, gaseous process medium, highpressure

7 Flow

8 Return

9 Liquid line, liquid process medium, highpressure

10 expansion valve

11 Injection line, liquid process medium, lowpressure


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Air as heat source

Air heated by the sun is universally

available. Even at 20 C outdoor air

temperature, heat pumps can still ex-

tract sufficient energy for efficient use.

However, air as heat source has the

disadvantage that it is coldest when the

highest heat demand arises.

Although it is still possible to extract

heat from air as cold as -20 C, the

heat pump coefficient of performance

decreases in line with the outside

temperature.

Therefore in most cases the aim is to

combine with a second heat source that

boosts the heat pump output, particu-

larly during the colder season.

One particular benefit is the ease of

installation of air | water heat pumps,

as no extensive ground work or well

drilling is required.

Heat source water

Main layout, air as heat source

Main layout, groundwater as heat source

26_0

3_0

1_0

360

EnErGy sourcEs and opEraTinG modEsEnErGy sourcEs


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Heat source: Ground with a geothermalcollector

At a depth of 1.2 m to 1.5 m, the

ground remains warm enough, even on

colder days, to enable an economical

heat pump operation.

This requires the availability of a prop-

erty large enough to accommodate a

pipe system for collecting the heat fromthe ground. As a rule of thumb, you

would need approximately two to three

times as much ground area as living

area to be heated.

In dry, sandy soil, the geothermal

collector can extract between 10 and

15 W/m and up to 40 W/m in ground

that carries groundwater.An environmentally responsible brine

mixture that cannot freeze and which

transports the yielded energy to the

heat pump evaporator courses through

the pipes.

If your property is large enough, you

have an inexhaustible reserve of energy

Main layout, geothermal collectoras heat source

26_0

3_0

1_0

362

EnErGy sourcEs and opEraTinG modEsEnErGy sourcEs


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EnErGy sourcEs and opEraTinG modEsmono modE / dual modE parallEl / mono EnErGETic

26

_03

_01

_1238

Mono mode operation

WP

QN100 %

-15 +20 C

TA

QN Heat load

HP Heat pump

TA Outside temperature

Operating modes

For the different types of heat pump

operation, the heating technology

world uses the following terminology:

Mono mode

The heat pump is the sole provider of

heating in the building.

This operating mode is suitable for all

low temperature heating systems up to

+60 C flow temperature.

Dual mode parallel / mono energetic

Down to a certain outside tempera-

ture, the heat pump alone delivers

the required heating energy. A second

heat source starts at low temperatures.However, contrary to the dual mode

alternative operation, the heat pump

proportion of the annual output is

higher.

This operating mode is suitable for un-

derfloor heating systems and radiators

up to the maximum heat pump flow


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BV Dual mode point

QN Heat load

HP Heat pump

ZH Booster heater/booster heater second heatsource

TU Changeover pointTA Outside temperature

Dual mode - alternativeDown to an outside temperature

determined by your contractor, such as

0 C, the heat pump delivers the entire

heating energy. When the temperature

falls below that value, the heat pump

switches itself OFF and the second

heat source takes over the heating

operation.

This operating mode is suitable for

all heating systems above +60 C flow

temperature.

26

_03

_01

_1240

Dual mode alternative operation

ZH

WP

QN100%

BV

-15 +20 CTU

TA

EnErGy sourcEs and opEraTinG modEsdual modE alTErnaTivE / dual modE parTially parallEl


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General information

Heating heat pumps can be linked into

new as well as into existing heating

systems.

In many cases, a mono mode operation

is feasible, so that no additional, con-

ventional heating system and associ-

ated additional investment is required,

even on those few exceptionally colddays of the year.

When deciding on the potential use of

a heat pump, the heat distribution sys-

tem too, and in particular the required

flow temperature, must be given due

consideration. Generally speaking, low

temperature and conventional radia-

tor heating systems can be supplied byheat pumps. When engineering new

systems, we recommend low tempera-

ture heating systems with max. flow

temperatures of +55 C.

Existing systems with conventional heat

distribution can generally be combined

with heat pumps without requiring

Part of this is an extensive installationaccessory range, e.g. buffer cylinders,

pressure hoses and control units. These

enable an easy, quick and consequently

cost-effective installation.

In the following, two examples of heat

pump installations are shown. Natu-

rally, alternative installation options are

also feasible.

Design example 1

Water | water heat pump

Operating mode: Mono mode

Mono mode operation is only feasible

in conjunction with a low temperature

heating system with a maximum flow

temperature of +60 C. At a specificheat demand of 50 W/m, suitable heat

pumps are available from the heating

system sizes listed in the table shown

above.

Important information

A water analysis is part of the first

Design example 2

Mono energetic air | water heat pump

WPL without additional boiler.

As the description suggests, the heat-

ing system does not require a second

form of energy. This heat pump oper-

ates with outside air temperatures

down to 20 C where the outdoor

air provides the heat source. Between5 C and 20 C the heating water

is additionally boosted by an integral

electric emergency/booster heater.

Air | water heat pumps are available in

different styles, versions and outputs.

This output is adequate for heating

from smaller to larger buildings with

heat loads up to approx. 200 kW.

Installation information

The unrestricted air flow through

the intake and discharge apertures

must be assured at all times.

A thermal short circuit between

the intake and discharge must be

THis is How your soluTion could looksysTEm ExamplE


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sysTEm EnGinEErinGEnGinEErinG informaTion


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DefrostingRemoving hoar frost or ice build-up

from the evaporator of an air | water

heat pump.

Refrigerant

Special term for refrigerant in heat

pump systems.

Dual mode temperature

Outside temperature, which dictates

when a second heat source is started.

Enthalpy

According to its definition, it is the sum

of internal energy and displacement

work. The specific enthalpy (kJ/kg) isused for all calculations.

expansion valve

Component of the heat pump between

the condenser and the evaporator for

reducing the condensation pressure to

the evaporation pressure that equates

Cooling capacityHeat flow extracted by the heat pump

evaporator.

Refrigerant

Material with a low boiling point,

which is evaporated by heat absorption

and re-liquefied through heat transfer

in a circular process.

Circular process

Constantly repeating changes in condi-

tion of a process medium by adding

and extracting energy in a sealed

system.

Coefficient of performance

Factor comprising the heating output

and the compressor drive rating. The

COP can only be quoted as an actual

value at a defined operating condition.

The heating load is always greater than

the compressor drive rating; hence the

COP is always > 1. Equation symbol:

Heat pumpMachine that absorbs a thermal flow

at a low temperature and transfers it

through energy supplied at a higher

temperature. When using the cold

side we refer to refrigerators, when

using the hot side we refer to heat

pumps.

Heat pump system

Total system, comprising a heat source

and a heat pump system.

Compact heat pump system

Fully-wired appliance, where the com-

plete refrigerant circuit, incl. safety and

control equipment, has been manufac-

tured and tested.

Heat source

Medium, from which the heat pump

extracts energy.

Heat consumer system (WNA)

TErminoloGy and dEscripTions


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summary of formulaE

Heat amount

Q = m *c *(t2- t1)

Q Heat amount [Wh]

m Amount of water [kg]

c Specific heat Wh/kgK [1,163 Wh/kgK]

t1 Cold water temperature [C]t2 DHW temperature [C]

Heating output

Q = A *k *

Q Heating output [W]

A Area [m]

k Heat transfer coefficient [W/mK]

Temperature differential [K]

k value

k =1

1 d 1

Heat-up time

T =m *c *(t2- t1)

P *

T Heat-up time [h]

m Amount of water [kg]

c Specific heat [Wh/kgK]

t1 Cold water temperature [C]t2 DHW temperature [C]

P Connected load [W]

Efficiency

Pressure drop

p = L *R + Z

p Pressure differential [Pa]

R Tubes frictional resistance

L Pipe length [m]

Z Pressure drop of the individual resistances

[Pa]

Mixed water volume

mm=

m2* (t2- t1)

tm- t

1

mm

Amount of mixed water volume [kg]

m1 Amount of cold water [kg]

m2 Amount of DHW [kg]

tm Mixed water temperature [C]t1 Cold water temperature [C]

t2 DHW temperature [C]

DHW volume

m2=

mm* (tm- t1)

t2- t

1

mm

Amount of mixed water volume [kg]

m1 Amount of cold water [kg]

m2 Amount of DHW [kg]

tm

Mixed water temperature [C]

t1 Cold water temperature [C]

t2 DHW temperature [C]


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Water qualityThe heating water quality has an

impact on the components that are part

of the water circuit as well as on the

function of the entire system.

Here, the water hardness and the

substances in the water are the crucial

factors.

In Germany, the water quality of heat-ing systems between 20 and 300 kW

output are regulated by the VDI 2035.

In accordance with VDI 2035, sheet

1, fill and top-up water of heating

systems must be treated or softened to

prevent damage. If the limits specified

in the table are not adhered to, soften

the heating water.

General function

Our softening appliances work on the

ion exchange principle.

When exchanging ions, the fill water

as well as the top-up water are routed

through a sodium ion exchange resin

HEaTinG waTEr qualiTy

Benefits of water softening Preventing thermal stresses through deposits

Prevention of mechanical stresses and component failure

Energy saving through optimised heat exchanger surfaces


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noTEs


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HEaTinG waTEr qualiTy

Sizing for the first system fill

The number of cartridges for the first

filling of a system is calculated in ac-

cordance with the following formula:

PANZ

VANL * (dHIST- dHSOLL)

KWWM

=

P Number of cartridges

HZEA /HZEN

PIC00001015-00

Cartridge service life

The achievable volume of softened

water and the top-up volume are used

as the basis for calculating the service

life of cartridges.

The annual top-up volume is assumed

to be 10 % of the system volume.

The amount of softened water is

calculated according to the followingformula:

VWWM

KWWM

dH=

VWWM

Volume of softened water

KWWM

Soft water capacity

in litres * dH

dHist

Total water hardness

Sample calculation for the amount of

softened water:

KWWM

= 6000 l dH

dHist

= 20 dH

VWWM

= ?

VWWM

KWWM

dH=

Result = 300 l

One cartridge generates 300 l of sof-

tened water.

Sample service life calculation:

VANL

= 2000 l

VWWM= 300 l

Service life (a) = VWWM

/ (VANL

* 0.1)

With a system volume of 2000 litres and

300 litres of softened water, a service

life of 1 5 years results


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20

-16 - 14 - 12 - 10 -8 -6 -4 -2 0 +2 +4 +6 +8 +10 +12 +14 +16

30

40

50

60

70

80

90A

B

C1

D

flow TEmpEraTurEs of HEaTinG surfacEs

Heating surface temperatureThe flow temperature of the heating

system is decisive for the application

options and the operating mode of the

heat pump.

Heating systems that require a flow

temperature in excess of +60 C can

only be operated with a heat pump in

dual mode together with a second heatsource or with a high temperature heat

pump. The changeover point of the

heat pump is determined not only by

the heating output of the heat pump,

but also by the sizing of the heating

surfaces.

Radiator heating systems used to be

sized around a flow temperature of

75C. Today, retrofitting thermal insula-

tion or oversizing generally means, that

a flow temperature of only +60 C or

less is generally required.

The heating surfaces of new systems

should be sized around a flow temper-

ature of no more than +55 C to enable

According to the above diagram the following flow temperatures produce the fol-

lowing changeover points to start the second heat source:

Flow temperatures for the corresponding outside temperatures

26_

03

_01

_0375

X Outside temperature [C]

Y Heating flow temperature [C]

1 Heat pump flow temperature [C]

A-D Flow temperature curves


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Hydraulic connEcTion inTo THE HEaT consumEr sysTEm

Buffer cylinderFor a perfect operation, heat pumps

require a minimum flow rate of heating

water. A buffer cylinder is recommend-

ed to ensure a trouble-free heat pump

operation.

Buffer cylinders provide hydraulic

separation between the heat pump

circuit and the heating circuit volumeflow. The flow rate in the heat pump

circuit remains constant if the flow rate

in the heating circuit is reduced by

thermostatic valves, for example.

Convector heating systems are gener-

ally filled with a small amount of water.

In such systems, use a buffer cylinder

of appropriate size to prevent frequent

cycling of the heat pump.

A buffer cylinder is also required for

the defrost operation of air | water heat

pumps.

Subject to tariff and country concerned,

heat pumps can be switched off by

electricity supply utilities during peak

Heat pump with overflow facility

Heat pump with low loss header (separating cylinder)

26

_03

_01

_0380


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Heating pipeworkThe additional water volume in the

buffer cylinder and the possibility of

shutting down the heat source requires

that an additional expansion vessel

is installed. Heat pumps are pro-

tected in Germany in accordance with

DIN EN 12828.

In systems operated without buffer cyl-inder, ensure the minimum heat pump

circulation volume on the water side.

Structure-borne noise transfer

Preferably, flexible pressure hoses

(anti-vibration) are used to connect the

machine to the pipework of the build-

ing. These will minimise the transfer

of oscillations, vibrations and other

structure-borne noise.

Use anti-vibration mounts for all pipe

fittings.

Circulation pumps in the heat pump

circuit

Dual mode heat pump system

Mono energetic heat pump system

HEaT pumps wiTH buffEr cylindEr

2

6_0

3_0

1_0

718


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HEaT pumps wiTHouT buffEr cylindEr

Installation without buffer cylinder

A constant heat pump flow rate is

required to enable the heat pump to

function correctly. This must be at least

20% of the nominal flow rate. Particu-

larly for air | water heat pumps, other

higher minimum flow rates may be

required.

The appliance-specific minimum flow

rate must be ensured at all times for air

| water heat pumps.

Constant flow rates are primarily

achieved with area heating systems,

where some zone valves are always

open. This can be realised by means

of an appropriate control unit for zone

valves.

To avoid contravening the Energy

Savings Ordinance [Germany], a dis-

pensation must be applied for from

the appropriate building authorities

if generally no zone valves are to be

installed.

Mono mode brine | water heat pump without buffer cylinder

Mono energetic air | water heat pump without buffer cylinder

2

6_0

3_0

1_0

714


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dHw HEaTinG

DHW heating with heat pumpsThe wide range of applications and the

many options of combining heat pumps

with cylinders of different sizes and

equipment levels require engineering

and installation documents, that are

tailored to each individual application.

The connections on the power supply

and water side of the heat pump aremade in line with our technical guide.

DHW cylinders

The size of the DHW cylinder is subject

to the daily and the peak consumption,

the DHW distribution system and the

installed draw-off points.

Apartment buildings and non-residen-tial buildings are sized in accordance

with the consumption profiles and

guidelines appertaining to the hygiene

requirements.

Generally, DHW is heated by means of

internal indirect coils or an external

heat exchanger

DHW heating with DHW cylinder SBB WP.

2

6_0

3_0

1_0

384

DHW heating with instantaneous water heater cylinder SBS W.


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Appliance description

The freshwater module supplies one or

two residential units with hot water.

This appliance is solely designed for

the transfer of heat from the cylinder

circuit (primary circuit) to a freshwater

circuit (secondary circuit).

Energy is delivered by a buffer cylinder

with a cylinder temperature of +55 C.The primary circulation pump is regu-

lated via block modulation, so that the

required DHW temperature remains as

constant as possible.

The DHW circulation option enables

three time slots to be defined. Outside

these times, DHW circulation is acti-

vated by draw-off detection.

An additional sensor enables the

activation of an immersion heater

inside the buffer cylinder via a floating

contact.

The freshwater module is pre-pro-

grammed at the factory.

DHW heating with a freshwater module

2

6_0

3_0

1_0

719

DHW heating with primary station

frEsHwaTEr modulE | primary sTaTion


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dHw cylindErsizinG TablE

Sizing table for DHW heatingDHW heating to 50 C with 60 C heat pump flow temperature DHW heating to 60 C with 70 C heat pump flow temperature

DHW cylindersSBB WP SBB plus SBS

301 302 401 401 501 501 300 300 400 400 600 600 601 801 1001 1501

Exchanger surface in m 3.2 4.8 4.0 5.4 5.0 6.4 1.1 2.7 1.3 3.0 1.9 4.4

Indirect coil connection bottom bottom bottom bottom bottom bottom bottom to to to to

from

the topfrom

the topfrom

the topfrom

the topfrom

the topfrom

the topfrom

the topfrom

the topfrom

the topfrom

the top1.8 m/h 2.0 m/h 2.4 m/h 3.0 m/h

kW m Achievable DHW temperature C Achievable DHW temperature C Suitable for

WPL 10 ACS 9.3 2.3 50 50 50 50 50 50 50 50 50 x x

WPL 10 I/A/IK 10.9 2.7 50 50 50 50 50 50 47 50 50 x x WPL 13 A basic 12.1 3.0 49 50 50 50 50 50 45 47 50 x x x WPL 20 A basic 20.0 5.0 47 50 48 50 45 x x x xWPL 13 E/cool 12.1 3.0 49 50 50 50 50 50 45 47 50 x x x WPL 18 E/cool 16.1 4.0 50 47 50 50 50 50 x x x xWPL 23 E/cool 20.4 5.1 46 49 47 50 x x x xWPL 33 HT/HT IK 15.0 3.8 54 60 59 60 60 60 51 53 45 60 x x x xWPL 34 28.5 7.1 45 x xWPL 47 39.3 9.8 xWPL 57 46.1 11.5 WPF 5 E/C 6.7 1.7 50 50 50 50 50 50 50 50 50 50 x x WPF 7 E/C 9.0 2.3 50 50 50 50 50 50 50 50 50 x x WPF 10 E/C/M 11.4 2.9 50 50 50 50 50 50 46 49 50 x x x WPF 13 E/C/M 15.1 3.8 50 49 50 50 50 50 x x x x

WPF 16 E/M 18.4 4.6 49 50 50 50 46 x x x xWPF 20 27.8 7.0 46 xWPF 27 33.6 8.4 WPF 27 HT 33.6 8.4 47 49 47 52 46 WPF 40 51.2 12.8 WPF 52 63.2 15.8 WPF 66 78.6 19.7 WPF 5 (groundwater) 7.2 1.8 50 50 50 50 50 50 50 50 49 50 x x WPF 7 (groundwater) 10.0 2.5 50 50 50 50 50 50 50 50 50 x x x WPF 10 (groundwater) 12.5 3.1 48 50 50 50 50 50 47 50 x x x xWPF 13 (groundwater) 17.1 4.3 50 46 50 50 50 48 x x x xWPF 16 (groundwater) 21 7 5 4 45 47 46 50 x x x x


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dHw cylindEr for rEsidEnTial buildinGssizinG TablE

Sizing table - DHW cylinders for residential buildingsThe table provides an impression of recommended cylinder combinations in residential buildings with typical consumption

profiles and concurrency. This overview is no substitute for individual system engineering and matching to the heat source or

system solution.

ce te fehte e chgg te

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rehetg

ne / lte Te lte Te lte Te 60 c *

5 300 300 SBB 300 WP No 400 SBP 400 No

6 360 300 SBB 300 WP No 700 SBP 400 No

8 480 400 SBB 400 WP Yes, with heatpump

700 SBP 700 No

10 600 500 SBB 500 WP Yes, with heatpump

1000 SBP 1000 No

12 720 600 2x SBB 300 WP Yes, with heat

pump

1500 SBP 1500 No

14 840 700 2x SBB 400 WP Yes, with heatpump

700 SBB 751 FCR 28/120


800 SBB 751 FCR 28/120


800 SBB 751 FCR 28/120

25 1500 900 SBB 1001 FCR 28/120

30 1800 1100 SBB 1001 FCR 28/120


30/398

Operation with an existing boilerThe combination of two heat sources

(e.g. oil or gas boiler and heating

heat pump) in detached or two-family

houses is generally not economical.

Dual mode operation is only a tempo-

rary solution where the system is to

continue in use, for example because

the oil tank is well filled.After using up the stock of oil, the oil

boiler should be removed and replaced

by the electric booster heater integrat-

ed in the heat pump. This requires that

the heating heat pump is appropriately

sized.

Apart from the space taken up by the

oil boiler and oil tanks, economic rea-sons particularly favour the removal of

the old system.

The running costs for maintaining the

oil system and the sweeping of the

chimney frequently exceed the energy

costs of the integral emergency/booster

heater

Dual mode air | water heat pump system

Dual mode air | water heat pump system

26

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modErnisinG oldEr buildinGsdual modE opEraTion wiTH ExisTinG boilEr


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modErnisinG oldEr buildinGsradiaTor sysTEms | rEplacEmEnT convEcTor HEaTErs

Replacement convectorRadiator heating systemsGenerally speaking, heating heat

pumps are well suited to heating

buildings fitted with existing radiator

distribution systems. However, before

the heat pump is taken into use it is

absolutely necessary to determine

the maximum required system flow

temperature at the design point, i.e.

the standard outside temperature. Inprinciple balancing the system hydrau-

lically is recommended.

The maximum required system

temperature should not exceed 55 C.

Sizing to this operating point ensures

an economical and comfortable system

operation.

However, operation at a higher flowtemperature is possible, namely with

the high temperature heat pumps

developed for this purpose. However,

in principle every heat pump system

operates all the more economi-

cally the lower the required system

Replacement convector heaters

Specially developed replacement con-

vector heaters are particularly suitable

for modernising individual rooms or

when replacing thermally inefficient

Users regulate the required room tem-

perature by means of an integral ther-

mostatic valve and also benefit from a

comparatively high heat-up perform-

ance. Replacement convector heaters

PIC00001665-00

_


32/398

Passive coolingThe low groundwater temperature or

that of the ground is transferred to the

heating system via a heat exchanger.

The heat pump compressor will not

be started. The heat pump remains

passive.

Active coolingThe cooling capacity of the heat pump

(cold side) is transferred to the heating

system.

The heat pump compressor will be

started. The heat pump is active.

Procedure for planning passive cooling

Calculating the cooling load to VDI 2078

in accordance with a standard

form

in accordance with the m area of

the living space (factor)

Temperature curve under ground

Passive building cooling Active building cooling

Utilisation of natural cooling

sinks

Cool ground / cool night air

Utilisation of storage effects

Utilisation of refrigerators

coolinG wiTH THE HEaT pump sysTEmpassivE and acTivE coolinG

26

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_

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coolinG load calculaTioncoolinG load calculaTion form

Cooling load calculationCalculate the cooling load in accord-

ance with VDI 2078.

Our cooling load calculation form or

our calculating program assist in the

simplified determination of the cooling

load of a room.

Our cooling load slide rule can also as-

sist in quickly determining the coolingload in situ.

Our empirical values too can assist in

achieving an estimated sizing:

ft w/3

Private homes 30

Offices 40

Sales rooms 50

Glass extensions 200

Simplified cooling load calculation inaccordance with the following calcula-

tion form

The cooling load calculation form ena-

bles a quick and easy calculation of the

cooling load of a room.

Sizing basis: Outside temperature

+32C at a room temperature of +27C

and constant operation.

position 1

Split the window areas in accordance

with the different points of the compass

and multiply them with the respective

values. Insert that point of the compass

into the addition of the cooling load

calculation that results in the high-

est value. Use the total of both values,if windows are pointed at to two

neighbouring points of the compass,

i.e. south-west and west. Also take

horizontal skylights into consideration

(see line attic windows). Consider

the stated reduction factors for equip-

Position 6Multiply the number of occupants by

the stated value. In accordance with

VDI 2067, the calculation is based on

the assumption of occupants at rest or

performing light work.

Position 7

Set the outside air proportion of the

appliance in accordance with manu-

facturers details. The cooling down of

the outside air proportion is taken into

account at 5 K.

Cooling load

Total of the individual cooling loads for

positions 1 to 7.

Appliance sizing

To achieve an internal temperature of

approx. 5 K below the outside tempera-

ture, the equipment cooling capacity

must be equal to, or greater than, the

calculated cooling load.


34/398

coolinG load calculaTioncoolinG load calculaTion form

Cooling load calculation form

For estimating the cooling load of a room with reference to the VDI 2078

Address: Type of room:

Surname: Sample man Size of room:

Street: Sample Street Length Width Height Surface Volume

Town: Sample Town 5.0 5.0 3.0 25.0 75.0

1. Insolation through win-

dows and external doorsExposed window Reduction factor, solar protection Window area

Cooling load,

windows

Single Double ThermalInternal

blindsAwning

External

shutters

glazing glazing glazing

W/m W/m W/m m watt

North 65 60 35

Northeast 80 70 40

East 310 280 155

Southeast 270 240 135 x 0.7 x 0.3 x 0.15

South 350 300 165

Southwest 310 280 155 4.0 174

West 320 290 160

Northwest 250 240 135

Attic window 500 380 220

Total 174

Total Only use the maximum value for different points of the compass.

2. Walls less window and door openings that have already been taken into account. Cooling load Wall area Cooling load

W/m Walls

m watt

External walls 10 26.0 260

Internal walls 10 15.0 150


35/398

Basics

The exceptionally attractive option of

using a brine | water or water | water

heat pump for cooling the building is

well known. Systems providing passive

cooling in particular can be created at

reasonable cost, be used efficiently and

be operated with hardly any emissions.

Possible applications can be found in

private homes as well as in apartmentsand in the public sector.

The increasing demand for cooling in

buildings is partially due to higher in-

ternal and external loads due to higher

comfort demands and substantial

changes in construction. The tendency

towards large transparent surfaces in

building walls as well as legal require-

ments aimed at increasingly better

building envelopes are verification for

this trend. It goes without saying that

the creation of a thermally comfortable

climate must not ignore energy and

efficiency. System solutions designed to

provide heating and cooling alike gen-

HEaT sinks for coolinG opEraTionGEoTHErmal probE

12 16 20 24 2814 18 22 26

0

10

20

30

40

50

60

70

80

90

100

4

3

2

1

Comfort zone (Leusden & Freymark)

26

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x Room air temperature TLin C

y Relative humidity in %

1 Comfortable

2 Just comfortable


36/398

Cooling with a geothermal collector

Using geothermal collectors for passive

and active cooling is generally possible,

but it does require accurate engineer-

ing. Collectors are installed near the

surface. This fact and high outside

temperatures can easily result in pas-

sive cooling heating up the ground

quite quickly. As a consequence, thecooling capacity dwindles significantly

due to the insignificant temperature

differentials.

In most cases, passive cooling becomes

impossible from a source temperature

of > 20 C.

The local conditions are decisive for theutilisation of the collector for cooling

purposes. The geological conditions

as well as the availability of water-

bearing strata determine the possibility

of utilisation. A geological assessment

must establish whether the heat flow

Main layout,

geothermal collector as heat source

26

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_0362

HEaT sinks for coolinG opEraTionGEoTHErmal collEcTor and GroundwaTEr

coolinG capaciTy


37/398

Cooling with a geothermal probe

Geothermal probes are sized in accordance with the heat pump heating output. The heat that must be transferred to the

ground with passive cooling is approx. 70 % of the extraction rate (approx. 35 W/m geothermal probe length).

Sizing table geothermal probe DN 25

For normal solid rock, extraction rate 55 W/m (average value)

se teete 0 c Gethe e Ett, hetg

e

Te, g

e

f teete 35c 32 * 2.9Hetg tt cg t ne deth

Het w w e w w

WPF E/C 5 cool 5.8 4.5 1 82 4.5 3.2

WPF E/C 7 cool 7.8 6.0 1 109 6.0 4.2

WPF E/C 10 cool 9.9 7.7 2 70 7.7 5.4

WPF E/C 13 cool 13.4 10.3 2 94 10.3 7.2

WPF 16 E cool 16.1 12.5 3 84 13.8 9.6

Example

Heat pump WPF E/C 10 cool

Required geothermal probe 2 pce @ 70 metres long

Extraction rate approx. 55 W per metre equates to approx. 7.7 kW.

The transfer to the ground amounts to approx. 5.4 kW.

coolinG capaciTysamplE sizinG

passivE coolinG


38/398

passivE coolinGwpc cool

Passive cooling with a WPC cool heat

pump

Installation information

Use only pipes and fittings made from

corrosion-resistant materials.

The formation of condensate is safely

prevented by additional dew point

monitoring in the lead room.

If sensitive areas in the building are

crossed, where different dew point

temperatures must be expected or

where the temperature falls below the

dew point temperature, insulate all

pipe runs with vapour diffusion-proof

material.

WPC cool mono-mode with passive cooling (heating mode) Minimum circulation volume on the heating side 20% of the nominal flow rate of the heat pump

WPC cool mono-mode with passive cooling (cooling mode) Minimum circulation volume on the heating side 20% of the nominal flow rate of the heat pump

26

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passivE coolinG


39/398

Passive cooling with a WPF E cool heat

pump

With brine | water heat pumps, the

heat source can also be used for cool-

ing purposes, i.e. as a heat sink.

An area heating system or fan convec-

tors is/are required for this function.

The formation of condensate is prevent-

ed by additional dew point monitoringin the lead room.


corrosion-resistant materials.

If sensitive areas in the building are

crossed, where different dew point

temperatures must be expected or

where the temperature falls below the

dew point temperature, insulate allpipe runs with vapour diffusion-proof

material.

WPF E cool mono mode with passive cooling (heating mode)

WPF E cool mono mode with passive cooling (cooling mode)

26

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passivE coolinGwpf E cool

acTivE coolinG


40/398

Active cooling with a WPC heat pump

Active cooling is unsuitable exclusively

with underfloor heating systems. Ac-

tive cooling additionally requires fan

convector heaters.


ed by additional dew point monitoring

in the lead room.

Use only pipes and fittings made fromcorrosion-resistant materials.

To prevent condensate being cre-

ated, all hydraulic pipework inside the

building must be insulated with vapour

diffusion-proof material.

WPC mono-mode with active cooling (heating mode)

WPC mono-mode with active cooling (cooling mode)

26

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acTivE coolinGwpc wiTH wpac 2

acTivE coolinG


41/398

Active cooling with a WPF E heat pump

Active cooling is unsuitable exclusively

with underfloor heating systems. Ac-

tive cooling additionally requires fan

convector heaters.



in the lead room.

Use only pipes and fittings made fromcorrosion-resistant materials.

To prevent condensate being cre-

ated, all hydraulic pipework inside the

building must be insulated with vapour

diffusion-proof material.

WPF E mono mode with active cooling (heating mode)

WPF E mono mode with active cooling (cooling mode)

26

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_0622

acTivE coolinGwpf E wiTH wpac 2

acTivE coolinG


42/398

Active cooling with a WPL cool heat

pump

Air | water heat pumps can also be

used for cooling buildings.

Size the heating heat pump for heating

operation in winter.

Matching of the cooling capacity of the

heat pump system to the cooling load

of the building opens up the possibility

of cooling in summer.

The sizing of the distribution system is

crucial for the transfer of thermal loads.

Underfloor heating systems are only

suitable for the transfer of high loads

to a limited degree, e.g. in conjunction

with active cooling of buildings, as the

transfer rate is low and frequent cycling

of the heat pump cannot be prevented.A combination with fan convectors is

recommended.



in the lead room.


WPL cool mono energetic with active cooling (heating mode)

WPL cool mono energetic with active cooling (cooling mode)

26

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acTivE coolinGwpl cool

disTribuTion sysTEms for coolinG opEraTion


43/398

Distribution systems

As with heating, sizing the cooling dis-

tribution system is an essential success

factor for cooling applications. Particu-

larly in passive mode, the transfer ca-

pacity and the associated temperature

level are restricted. The distribution

system must be able to maximise the

effectiveness of the system. Apart from

thermo-active systems, fan convectorsor ceiling cassettes are commonly used.

Thermo-active component systems

Water-bearing pipework that is inte-

grated in ceilings, walls and floors to

help create a cosy ambience, gener-

ally comes under the umbrella term

Thermo-active component systems.Subject to demand, buildings can be

heated or cooled by circulating hot or

cold water through the pipework. The

large areas that transfer heat or cooling

enable an effective energy provision

even at minor temperature differentials

between the room and the respective

Hook and loop system

disTribuTion sysTEms for coolinG opEraTionundErfloor coolinG

26

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coolinG capaciTiEs of undErfloor HEaTinG sysTEms


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coolinG capaciTiEs of undErfloor HEaTinG sysTEms

Underfloor cooling capacity

A persons capacities suffer severely

at room temperatures that are too low

or too high. Comfortable room tem-

peratures are therefore essential to

our wellbeing. In most cases, cooling

systems can ensure very good room

comfort with only little energy expendi-

ture. The energy exchange between a

person and the cooling area predomi-nantly takes the form of radiation. The

underfloor cooling is therefore a good

start for a comfortable ambient climate.

When using an area cooling system,

the cooling water temperature must

always be safely above the dew point

temperature to prevent condensation

forming on the cooling surfaces. Sub-

ject to room temperature and humid-ity, the room temperature may only be

able to be reduced by a few kelvin. For

example, an underfloor heating system

with tiled cover and a spacing between

pipes of 10 cm has a specific cooling

capacity of 22 W/m. The required room

12 16 20 24 2814 18 22 26

0

10

20

30

40

50

60

70

80

90

100

4

3

2

1

Comfort zone (Leusden & Freymark)

26

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_0391

x Room air temperature TLin C

y Relative humidity in %

1 Comfortable

2 Just comfortable

3 Uncomfortably humid

4 Uncomfortably dry

Note

In some countries such as

disTribuTion sysTEms


45/398

1

2

3

4

5

6

Ceiling cooling

Chilled ceilings or wall-embedded

heating systems are suitable for cooling

with heat pumps.

The cooling capacity of cooling ceilings

is generally higher than underfloor

heating systems used for cooling. This

is partially due to the fact that the heat

transfer to the room is different, and

that the room temperature should notfall below of 21 C at a height of 0.1 m

above floor level (ergo underfloor cool-

ing) for reasons of comfort.

The principle behind cooling a room via

pipe banks let into the ceiling is similar

to cooling via the underfloor heating

system. Cold water circulates through

a pipework and thereby extracts heatfrom the room. Ideal application areas

for chilled ceilings are, for example,

industrial buildings, shopping centres,

libraries, offices or banks.

Commonly, these are buildings with

high ceilings where ventilation equip-

Chilled ceiling (thermo-active structural component)

Comfort Panel

26

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_1277

disTribuTion sysTEmscHillEd cEilinG

1 Floor covering

2 Screed

3 Thermal insulation

4 Reinforcement

5 Ceiling

6 Plaster



46/398

1

2

3

4

5

6

Concrete core activation

If buildings are designed and con-

structed to be architecturally and phys-

ically energy optimised, conventional

refrigeration equipment for cooling the

building will not be required. Instead,

cooling can utilise natural heat sinks,

such as the ground or groundwater.

Prerequisite for this is that the inherent

storage capacity of the building can beutilised for balancing temperatures.

The pipe banks are generally located

in the statically neutral zones of the

surfaces surrounding the room, and

are cast straight into the concrete core

in meander or spiral form to provide

core cooling. Frequently used materials

are plastic or multi-layered compositepipes made from PE or aluminium.

The pipes have a diameter of 15 to 20

mm and are laid at centres between 10

and 30 cm. The water flowing through

the pipe bank can be used for heating

or cooling purposes, depending on

its temperature The pre requisite for

Summary:

Benefits of thermo-active structural

systems

Heating and cooling operation with

one system

Concrete core activation

26

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_1278

disTribuTion sysTEms for coolinG opEraTioncorE coolinG

Disadvantages of thermo-active struc-

tural systems

Limited cooling capacity due to re-

stricted flow temperatures (dew point

monitoring)

1 Floor covering

2 Screed

3 Thermal insulation

4 Reinforcement

5 Ceiling

6 Plaster



47/398

disTribuTion sysTEms for coolinG opEraTionfan convEcTors and cassETTE uniTs

Fan convector

Cassette unit

PIC00001229-00

Fan convectors and cassette units

Apart from thermo-active systems, fanconvectors or ceiling cassettes are com-

monly used for cooling buildings. The

coolant temperatures lie between +7 C

and +20 C.

With fan convectors and cassette units,

the cooling water temperatures can

be reduced to below the dew point.

Sensible heat as well as latent heat canbe extracted from the room air through

the condensate removal.

The cooling capacity of a fan convec-

tor or a cassette unit is subject to the

size, the air flow rate and the coolant

temperature.

Where sizing takes the requirements

of DIN 1946 into account, for example,specific cooling capacities of 30 to

60 W/m heat exchanger surface are

achieved.

The normal equipment sizing for aver-

age fan stages offers users the op-

tion of regulating quickly, even when

coolinG wiTH fan convEcTors


48/398

coolinG capaciTy

Cooling operation output details

Te acTH 20 acTH 40 acTH 50

pt . 189820 189821 189822

f tge s me Hgh s me Hgh s me Hgh

cg te teete c 15/20 15/20 15/20 15/20 15/20 15/20 15/20 15/20 15/20

Cooling capacity at 23 C room temp. W 285 367 532 532 588 662 680 799 969





Heating operation output details


pt . 189820 189821 189822


Hetg te teete c 50/40 50/40 50/40 50/40 50/40 50/40 50/40 50/40 50/40

Heating output at 15 C room temp. W 1600 2185 2780 3255 4570 5065 4955 6270 7250

Heating output at 18 C room temp. W 1475 2015 2565 3000 4215 4675 4570 5780 6685Heating output at 20 C room temp. W 1405 1915 2440 2855 4015 4450 4350 5500 6365



coolinG wiTH cassETTE uniTs


49/398

coolinG capaciTy

Cooling operation output details

Te ackH 10 ackH 12 ackH 18

pt . 223441 223442 223443


cg te teete c 15/20 15/20 15/20 15/20 15/20 15/20 15/20 15/20 15/20






Heating operation output details


pt . 223441 223442 223443


Hetg te teete c 50/40 50/40 50/40 50/40 50/40 50/40 50/40 50/40 50/40


Heating output at 18 C room temp. W 2255 2420 3316 3070 3296 4514 3892 4179 5724Heating output at 20 C room temp. W 2088 2241 3070 2842 3051 4180 3604 3869 5300



air | waTEr HEaT pump


50/398

|ExTErnal insTallaTion

ExTErnal insTallaTion


51/398

M2

L

M1

L

Law of Distance

Law of Distance: The sound pressure level is reduced by approx. 6 dB(A) if distance L doubles in length.

26

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_0725

M2

LpA2 37 dB(A)

LpA1 43 dB(A)

M1

Law of Distance using the WPL 23 A as an example

sound Emissions

Acoustic emissions

In operation, any air | water heat pump

will generate some noise. To avoid

discussions with users and neighbours,

site conditions should be ascertained

prior to selecting a product. The cor-

rect calculation of the expected noise

development is of equal importance.

This calculation is relatively easy to

accomplish if the principles of acousticengineering are known and are applied

correctly.

A sound, tone or noise are all de-

scribed as sound. A tone is a single

constant vibration, whilst a sound is

several tones laid over each other. A

noise on the other hand is an irregular

vibration with many frequencies.

Sound spreads in the form of mechani-

cal waves. This can be compared with

the spread of waves in water. Like on

calm waters when hit by a stone, waves

spread in circular motion for as long

as there is no barrier in the way. The



52/398

sound Emissions

LW= 10 log

10dB( )PP

0

LW

= sound power level in dB

P = sound power in W

P0= standardised reference value in W

These test procedures are involved and

must be carried out under laboratory

conditions. However, since the results

are independent of ambient influences

and test distances, the sound power

level is the ideal comparative value

for appliances and machines when it

comes to volume of noise.

Frequency weighting

The sound power level is subjected toa frequency weighting in order to take

the frequency response of human hear-

ing into account. In various guidelines

(e.g. TA-Lrm [Germany] as well as in

general noise protection measures or

in statutes, A-weighting is the most

When measuring the sound pressure

level, the distance from the soundsource as well as structural or measur-

ing conditions must always be taken

into consideration. For this, the back-

ground sound level in the test vicinity

must also be taken into account oth-

erwise there would be a risk of traffic

noise on a main thoroughfare being

louder than the actual sound source

to be examined. This could result in a

false reading.

In addition, the sound pressure level

can also be calculated directly from the

sound power level using the following

formula:

LpA = LWA + 10 log10[ ]Q

(4**d2)

LpA = A - weighted sound pressure level in dB(A)

LW

A = A - weighted sound power level in dB(A)

Q = Korrekturfaktor

d Abstand in m

approx. 10 dB (from a sound pressure

level of 40 dB).

Two sound sources of the same volume

(cascade)

Two identical sound sources result in

an increase of the sound power level

of 3 dB compared to the sound power

level of a single sound source.



53/398

In Germany, TA-Lrm applies in case of

disagreements.

The Technische Anleitung zum Schutz

gegen Lrm (TA-Lrm) [Germany] is

a general administrative regulation.

It is designed to protect the general

public and neighbourhood against

detrimental environmental influences

through noise. The TA-Lrm builds the

foundation for approval processes forcommercial and industrial plant. It is

not compulsory for detached houses or

apartment buildings, it is nevertheless

used as the basis for assessments in

cases of dispute. If a heat pump system

or air conditioning unit is sited in the

garden, a specific limit must not be

exceeded at the place of immission

- for example a neighbouring window- subject to the category applied to the

district (residential area). In built-up

areas, select a test point that lies 0.5 m

outside the centre of the open window

of the area most affected by the noise

that is to be protected (e.g. bedrooms).

Country comparison

In France, regulation N 2006-1099

dated 31 August 2006 applies to anti-

noise measures in neighbourhoods.

This regulation specifies limits between

ambient noise and the residual noise,

comprising normal interior and exterior

noise in a given location.

lt . b(a)

Day, 07:00 - 22:00 h 5

Night, 22:00 - 07:00 h 3

Note

Observe the standards and

regulations applicable in your

country.

Whatare the implications for siting heatpumps outdoors?

The simplest option of determining

whether to site a heat pump externally

in accordance with the local condi-

tions is to carry out your own calcula-

tion of the sound pressure level at the

sound Emissions



54/398

Air routing

When siting air | water heat pumps

externally, there are generally no

problems with routing the airways.

However, prevent the discharge of cold

air towards neighbouring properties

(patios, balconies).

Prevent air being discharged directly

towards house or garage walls. Pay

particular attention to noise pollution.Prior to installation, consider the sound

propagation, whether towards neigh-

bouring properties or towards your

own home.

Never install the heat pump imme-

diately adjacent to living rooms or

bedrooms.

Insulate pipe outlets through walls andceilings against structure-borne noise

transmission.

Our heat pumps are characterised by

particularly quiet operation. Never-

theless, incorrect siting can, under

unfavourable conditions lead to an

Acoustic measures

Lawn areas and shrubs can contribute

to the reduction of noise. Avoid instal-

lation on hard floor areas. Large floor

areas which sound can bounce off can

act as reflectors and can raise sound

levels by up to 3 dB(A) compared with

an installation on insulated floors.

Direct sound spreadDirect noise spread when install-

ing a freestanding heat pump can be

reduced by structural obstacles. Noise

levels can be reduced by walls, fences,

palisades etc.

A sound reduction of 2 dB(A) can be

achieved with the WPL 13/18/23/33 by

using a duct silencer.

Structure-borne noise

As for all heating systems, the transfer

of structure-borne sound through heat-

ing pipes to brickwork and radiators

should be prevented. Heat pumps

26

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EnGinEErinG informaTion

26

_03_01

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55/398

1

A

B

C

2 3 4

5

Condensate drain

Route the condensate drain hose witha steady downward slope out of the

bottom of the heat pump.

Drain the condensate via a drain that is

free from the risk of frost or let it soak

away over a coarse gravel bed.

Condensate drain

1 Ground

2 Coarse gravel back filling

3 Concrete slab

4 Condensate drain

5 Drainage pipe

A 10 cm

B 30 cm

C 80 cm

26

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condEnsaTE drain

air | waTEr HEaT pumpsinTErnal insTallaTion


56/398

inTErnal insTallaTion

inTErnal insTallaTionair rouTinG


57/398

Air routing

For internal installations, connect the

air side with flexible air hoses or via air

ducts and flexible connections routed

to the outdoors.

Observe previous information regarding

sound emissions.

Limit the velocity at the air intake

and air discharge to a maximum of

2 m/s, relative to the unobstructed

cross-section of the air grille (noise

development).

Always prevent an air short-circuit

between the air intake and air dis-

charge. It would be practical to draw in

air from around the corner or cross-

wise. If the intake and discharge are

at the same level, ensure a minimumdistance of 3 m between them. If

necessary, provide a separating wall

or suitable plantings between the air

intake and the air discharge.

The weather or bird protection grilles

should be easily removable for clean

Cellar in a corner

The example shows the installation of a

compact heat pump in a cellar corner.

Routing the air around a building

corner effectively prevents air short-

circuits between discharge and intake

air.

Size the intake and discharge grilles so

that the unrestricted cross-section of

the vent is large enough.

Cellar separate ducts

When installing a compact heat pump

in a cellar, connection of air ducts to

two cellar light wells on the same side

of the building is possible, subject to

the distance between the light wells

being sufficient to prevent a thermalshort-circuit.

Protect the air intake and air discharge

ducts by means of a cover against

leaves and snowfall.

Cellar common duct

air rouTinG

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Condensate drain

Use a suitable hose as condensatedrain that should be connected to

the defrost pan connector of the heat

pump.

Route the condensate drain hose with

a steady downward slope or out to the

side of the heat pump.

For heat pumps installed internally,

route the condensate into a sewer.

If a condensate pump is used to drain

off the condensate, set the heat pump

approx. 100 mm higher, alternatively

set the condensate pump mounting

area approx. 100 mm lower.

321

Condensate drain

1 Drain with stench trap

2 Drain hose with a steady slope

3 Condensate drain connection

26

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_01

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condEnsaTE drain

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EnGinEErinG cHEcklisT

Design/engineering and installation of air | water heat pumps

What is the purpose of the heat pump?

What heat source supplies the heat pump?

How are the heating surfaces designed? Low temperature heating systems are recommended.

What is the required heating output? Calculate the heat load.

Obtain permission from your electricity supply company [if required].

Determine the operating mode of the heat pump according to the heating system.

How can the heat pump be integrated easily into the heating pipework?

Should DHW be heated by the heating heat pump?

How do I make the power connection?

Observe general requirements and guidelines.

Observe conditions on site.

Air | water heat pumps - external installation

Where can the heat pump be located? Provide foundations.

Observe the air routing. Ideally, the air discharge direction should be in line with the main wind direction.

Ensure that neighbouring properties are not disturbed by noise.

Maintain minimum clearances to the periphery, and check whether planning permission is required.

Ensure short line runs.


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Compact convenience

Design and installation are straightfor-ward with our air | water heat pumps.

The practical compact design houses

all components and safety equipment

together inside a single casing. That

reduces the overall volume and saves

valuable space. The air | water heat

pump uses outdoor air as a heat source

down to an outside temperature ofapprox. 20 C.

Between 5 C and 20 C, a small

electric booster heater switches itself

on, subject to demand.

In its different versions, this pro-

duces sufficient heat for small to large

houses with a living space of up to

approx. 720 m.

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appliancE TypEs and applicaTions

Appliance types and applications

wpl5n

wpl10

ac/acs

wpl10

a/i/ik

wpl

wplE

wplcool

wpl33

wpl33

HT

wpl34/47/57

itee the g:Detached and two-family houses

Apartment buildings

Non-residential buildings

ste the g g jet:

New build

Modernisation, heating flow temperature < 55 C

Modernisation, heating flow temperature < 70 C

wth the g t ete:

Heating

Cooling

Inverter (demand-dependent compressor control)

DHW heating with a floorstanding cylinder

DHW heating with a cylinder module 200 l 200 l

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at aT au bE bG cH cs da dE EE El Gb us Es ET fi fr Gr Hr Hu id iT il lT lv ma mk na nl no pH pl pT ro ru sk sl sv TH Tr uk za

WPL 5 N plus x x x x x xWPL 10 ACS x x x x x x x

WPL 10 AC x x x x x x x

HSBB 10 AC x x x x x x

WPL 10 A x x x x x x x x x x x x x x x x x

WPL 10 I x x x x x x x x x x x x x x x x x

WPL 10 IK x x x x x x x x x x x x x x x x x

WPL 13 basic x x x x x x x x

WPL 20 basic x x x x x x x x

WPL 13 S x x x xWPL 18 S x x x x

WPL S x x x x x

WPL E x x x x x x x x x x x x x x x

WPL cool x x x x x x x x x x x x x

WPIC x x x x x x x x x x x x x x x

WPL 33 HT x x x x x x

WPL 34 x x x x x x x x x x x x x



availabiliTy

noTEs


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wpl 5 n plus

PIC00000743-00

Inverter air | water heat pump with CO2 technology. Consisting of a heat pumpmodule for external installation and a cylinder module for internal installation.

The control of fan and inverter compressor, as well as the low air resistance of the

evaporator, enable an extremely low sound power level. The refrigerant circuit is

hermetically sealed, tested for leaks at the factory and filled with natural refrig-

erant CO2 (R722). The inverter compressor is regulated subject to demand and

ensures excellent efficiency. High temperature differentials (e.g. in DHW heating)

enable high efficiency due to the characteristics of the refrigerant (CO2). Optimum

utilisation of the effect by regulating cylinder heating using electronically con-

trolled circulation pumps in the cylinder module. Cylinder module comprising arobust metal casing made from galvanised, powder coated and stove enamelled

sheet steel. With integral emergency/booster heater for mono heating mode or

mono energetic heating mode and high DHW temperatures. High DHW con-

venience through an enamelled 200 l DHW cylinder with external indirect heat

exchanger and a control unit optimised for the CO2 refrigerant circuit and cylinder

heating. Controlled via the integral heat pump manager with backlit symbol and

plain text display. Including two pressure hoses for the hydraulic connection to the

heating network.

at ge

Fully automatic heating wa-

ft

Heat is extracted from the outdoor air

set t

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spEcificaTion

wpl 5 n

Part number 229908

ott t En 14511

Output at A-15/W35 (EN 14511) kW 4.30

Output at A-7/W35 (EN 14511) kW 4.05

Output at A-7/W55 (EN 14511) kW 2.62

Heating output at A2/W35 partial load (EN 14511) kW 2.59

Output at A2/W45 (EN 14511) 2.94



Output at A7/W55 (EN 14511) kW 1.85Heating output at A10/W35 partial load (EN 14511) kW 3.58


Hetg tt t En 255

Output at A-7/W35 ( En 255) kW 4.69

pe t

Power consumption, emergency/booster heater kW 8.8

Max. power consumption, circulation pump, heating side W 70

Power consumption, fan heating max. kW 0.028

pe t t En 14511Power consumption at A-15/W35 (EN 14511) kW 2.21

Power consumption at A-7/W35 (EN 14511) kW 1.87

Power consumption at A-7/W55 (EN 14511) kW 2.17

Power consumption at A2/W35 partial load (EN 14511) kW 0.90

Power consumption at A2/W45 (EN 14511) 1.50

Power consumption at A7/W35 partial load (EN 14511) kW 0 83

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wpl 5 n

H t

Cylinder capacity l 200

Eet et

Current (with/without softstarter) A < 5

Fuse - compressor A 16

Control circuit fuse A 16

Emergency/booster heater fuse A 16

Frequency Hz 50

Control phases 1/N/PE

Phases, emergency/booster heater 3/N/PERated control voltage V 230

Compressor phases 1/N/PE

Rated compressor voltage V 230

Rated voltage, emergency/booster heater V 400

ve

Condenser material 1.4401/Cu

Defrost method Hot gas bypass

IP-Rating external unit IP14B

IP-Rating internal device IP20

de

Height mm 690

Width mm 820

Depth mm 300

Height cylinder module mm 1921

Width cylinder module mm 600

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Performance diagram

2

1

1

0

2

3

4

5

6

84

_03

_01

_0127

_

X Outside temperature [C]

Y Heating output [kW]

1 Flow temperature 35 C; WPL 5 N

2 Flow temperature 55 C; WPL 5 N

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1765

80

45

20-40

300

555

470

385

214

130

700

600

1921

d01

c06c11

b01

e01

e02 d02 c01

Installation location requirements

Hydraulic module

The room in which the appliance is to

be installed must meet the following

conditions:

Free from the risk of frost

Load-bearing floor.

Level, even and firm base.

The room must not be subject to a

risk of explosions arising from dust,

gases or vapours.

When installing the appliance in

a boiler room together with other

heating equipment, ensure that the

operation of the other heating ap-

pliances will not be impaired.

In the case of floating screeds,

recess the screed and the impact

sound insulation around the instal-

lation site of the heat pump.

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Installation location requirements

Heat pump module

Maintain the minimum clearances

towards the building.

The heat pump module must be

level (horizontal).

Wind from the predominant wind

direction must not blow directly

onto the fan.

When selecting the installation

location, remember that the ap-

pliance generates noise and cold

draughts during operation.

Maintain as small a clearance as

possible between the heat pump

module and the hydraulic module

to keep line losses to a minimum.

In winter, the heat pump module

must not be covered with snow

or be submerged if there is heavy

rainfall.

Ensure access to the connection

691

115

831 312

912

510

327

e27

e26

b01 d45

wpl 5 n

D0000016786

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Heating connection

Connect the heat pump into the heat-ing water side of heating systems in

accordance with the standard circuit

diagram.

Prior to connecting the heat pump,

flush out the heating system, check for

tightness and carefully vent it.

Observe the correct connection of

heating flow and return as well as thecorrect pipework cross-section.

Use the pressure hoses supplied to

reduce structure-borne noise transmis-

sion on the water side.

Carry out thermal insulation in accord-

ance with the Energy Saving Ordinance

[Germany].

WPL 5 N plus with hydraulic module

1 Pipeline copper 22 x 1.0 max. single length 10 m

1

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Electrical connection

B1 Temperature sensor heat pump flowB2 Temperature sensor heat pump return

T (WW) Temperature sensor DHW

T (A) Outside temperature sensor

T (MK) Temperature sensor, mixer circuit

Fern1 Remote control

Fern3 Remote control

H BUS hi h

EVU Enable signalM(A) Mixer open

M(Z) Mixer closed

HKP Heating circuit pump

QKP Source circuit pump

Buffer Buffer primary pump

1 Control circuit 1/N/PE 230V 50HzDomestic electricity meter

Electrical connection

You may need to notify your localpower supply utility of the heat pump

connection.

All electrical installation work, par-

ticularly earthing measures, must be

carried out in accordance with local and

national regulations and the require-

ments of your local power supply

company.The connection must comply with the

power connection diagram. For this,

also observe the installation instruc-

tions for the heat pump manager.

Elt%20Haupt%20WPL5N

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PIC00001670-00

Air | water heat pump for compact external installation. Internal air routing andthe shape of the plastic vanes of the axial fan ensure a lower sound power level.

The metal casing is corrosion-protected and made from galvanised and powder

coated sheet steel with an Alpine White stove enamelled finish. The fan grille,

the moulded recesses and the cover are made from weather-compensated and

UV-resistant plastic in Aluminium White. The refrigerant circuit is hermetically

sealed, tested for leaks at the factory and filled with safety refrigerant R407C. The

generously sized evaporator raises the heat pump efficiency. The large fin spacing

of the evaporator provides little air resistance, resulting in sound reduction and

an optimised defrost function. The 4/2-way valve enables defrosting by reversingthe circuit and the changeover of the refrigerant circuit from heating to cooling

mode. With integral emergency/booster heater for mono heating mode or mono

energetic heating mode and high DHW temperatures. An electronic expansion

valve with bi-flow characteristics and its own control unit and switching via the

internal heat pump control systems serves to optimise the superheating control

and thereby achieves an improvement in the COP. Time optimised and energy

efficient defrosting by reversing the circuit. The condensate pan is heated by the

refrigera nt circuit to enable efficient defrosting. With integral heat and electricity

metering via refrigerant circuit data. Including all safety equipment required forthe refrigerant circuit.

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wpl 10 acs wpl 10 ac

Part number 227995 230236

ott t En 14511

Output at A-7/W35 (EN 14511) kW 4.94 4.73

Output at A2/W35 (EN 14511) kW 6.53 6.39

Output at A7/W35 (EN 14511) kW 7.72 7.72

Output at A10/W35 (EN 14511) kW 8.49 8.29

Heating output at A7/W45 (EN 14511) 7.22 7.22

Refrigerating capacity at A35/W7 kW 6.39 6.26

Cooling capacity at A35/W18 kW 9.31 8.96

pe tPower consumption, emergency/booster heater kW 6.2 8.8

Power consumption, fan heating max. kW 0.11 0.11

pe t t En 14511

Power consumption at A-7/W35 (EN 14511) kW 1.73 1.63

Power consumption at A2/W35 (EN 14511) kW 1.94 1.90



Power consumption at A7/W45 (EN 14511) 2.26 2.26

Power consumption - cooling at A35/W7 kW 2.61 2.62Power consumption Cooling at A35/W7 kW 3.26 3.17

ceet ee t En 14511

Coefficient of performance at A-7/W35 (EN 14511) 2.86 2.90

Coefficient of performance at A2/W35 (EN 14511) 3.37 3.36

Coefficient of performance at A7/W35 (EN 14511) 3.77 3.80

Coefficient of performance at A10/W35 (EN 14511) 4 02 4 02

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wpl 10 acs wpl 10 ac

ve

Refrigerant R407 C R407 C

Flow/return connection G 1 1/4 A G 1 1/4 A

Defrost method Circuit reversal Circuit reversal

IP-Rating IP14B IP14B

Frost protection Yes Yes

de

Height mm 900 900

Width mm 1270 1270

Depth mm 593 593weght

Weight kg 120 120

ve

Refrigerant capacity kg 2.5 2.5

Flow rate, heating side m/h 1.4 1.4

Heating flow rate (min.) m/h 0.7 0.7

Flow rate, heat source side m/h 2300 2300

Internal pressure differential hPa 180 180

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Connection dimensions, heat pump module

(890)

900

35-40

490

480

210

295

100

g01 g02

e01

e02

d45

b01

80.a

i

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Installation location require

heat pumps planning file 2012

Documents