heat pumps planning file 2012
DESCRIPTION
proiectare sisteme pompe de caldura STIEBEL ELTRONTRANSCRIPT
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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
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_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
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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
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3_0
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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
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_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
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03
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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)
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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
o-
t
wte
e
ce
t
ce
pte-
t -
t
ce
t
ce
pte-
t t
ce
t
ce
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
16 960 800 2x SBB 400 WP Yes, with heatpump
800 SBB 751 FCR 28/120
20 1200 900 2x SBB 500 WP Yes, with heatpump
800 SBB 751 FCR 28/120
25 1500 900 SBB 1001 FCR 28/120
30 1800 1100 SBB 1001 FCR 28/120
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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
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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
_
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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
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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.
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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
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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)
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x Room air temperature TLin C
y Relative humidity in %
1 Comfortable
2 Just comfortable
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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
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HEaT sinks for coolinG opEraTionGEoTHErmal collEcTor and GroundwaTEr
coolinG capaciTy
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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
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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
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passivE coolinG
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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.
Use only pipes and fittings made from
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)
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passivE coolinGwpf E cool
acTivE coolinG
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Active cooling with a WPC heat pump
Active cooling is unsuitable exclusively
with underfloor heating systems. Ac-
tive cooling additionally requires fan
convector heaters.
The formation of condensate is prevent-
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)
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acTivE coolinGwpc wiTH wpac 2
acTivE coolinG
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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.
The formation of condensate is prevent-
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.
WPF E mono mode with active cooling (heating mode)
WPF E mono mode with active cooling (cooling mode)
26
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acTivE coolinGwpf E wiTH wpac 2
acTivE coolinG
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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.
The formation of condensate is prevent-
ed by additional dew point monitoring
in the lead room.
Use only pipes and fittings made from
WPL cool mono energetic with active cooling (heating mode)
WPL cool mono energetic with active cooling (cooling mode)
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acTivE coolinGwpl cool
disTribuTion sysTEms for coolinG opEraTion
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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
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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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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
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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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disTribuTion sysTEmscHillEd cEilinG
1 Floor covering
2 Screed
3 Thermal insulation
4 Reinforcement
5 Ceiling
6 Plaster
disTribuTion sysTEms for coolinG opEraTion
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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
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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
disTribuTion sysTEms for coolinG opEraTion
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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
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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
Cooling capacity at 25 C room temp. W 373 510 577 764 865 1036 940 1168 1505
Cooling capacity at 27 C room temp. W 459 647 747 974 1137 1402 1180 1495 2037
Cooling capacity at 29 C room temp. W 609 828 968 1291 1370 1747 1583 1947 2551
Cooling capacity at 31 C room temp. W 833 1121 1289 1786 2054 2464 2186 2712 3564
Heating 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
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
Heating output at 22 C room temp. W 1315 1795 2285 2675 3760 4165 4075 5155 5960
Heating output at 24 C room temp. W 1230 1675 2130 2495 3505 3885 3800 4805 5560
coolinG wiTH cassETTE uniTs
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coolinG capaciTy
Cooling operation output details
Te ackH 10 ackH 12 ackH 18
pt . 223441 223442 223443
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 413 435 550 656 691 874 868 915 1158
Cooling capacity at 25 C room temp. W 563 593 750 894 942 1192 1184 1247 1579
Cooling capacity at 27 C room temp. W 713 751 950 1133 1193 1510 1500 1580 2000
Cooling capacity at 29 C room temp. W 863 909 1115 1371 1444 1828 1816 1913 2421
Cooling capacity at 31 C room temp. W 1013 1067 1350 1609 1695 2146 2132 2245 2842
Heating operation output details
Te acTH 10 acTH 12 acTH 18
pt . 223441 223442 223443
f tge s me Hgh s me Hgh s me Hgh
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 2505 2689 3684 3411 3662 5016 4325 4643 6360
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
Heating output at 22 C room temp. W 1921 2062 2824 2615 2807 3846 3316 3559 4876
Heating output at 24 C room temp. W 1754 1883 2579 2388 2563 3511 3027 3250 4452
air | waTEr HEaT pump
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|ExTErnal insTallaTion
ExTErnal insTallaTion
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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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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
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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.
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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
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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
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EnGinEErinG informaTion
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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
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condEnsaTE drain
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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
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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
WPL 47 x x x x x x x x x x x x x
WPL 57 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
Heating output at A7/W35 partial load (EN 14511) kW 3.15
Heating output at A7/W45 partial load (EN 14511) kW 1.54
Output at A7/W55 (EN 14511) kW 1.85Heating output at A10/W35 partial load (EN 14511) kW 3.58
Heating output at A20/W55 partial load (EN 14511) kW 1.87
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/W35 (EN 14511) kW 2.05 2.03
Power consumption at A10/W35 (EN 14511) kW 2.11 2.06
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