STIEBEL ELTRON | Engineering and WPL 19/24 | Technical Guide | Stiebel Eltron Engineering and WPL 19/24 Technical Guide

Stiebel Eltron Engineering and WPL 19/24 Technical Guide
DHW
Renewables
Air conditioning
Room heating
Engineering and installation
WPL 19/24
Engineering and installation
Reprinting or duplication, even partially, is only allowed with our express permission.
STIEBEL ELTRON GmbH & Co. KG, 37603 Holzminden
Legal note
Although we have tried to make this technical guide as accurate as possible, we are not liable for any inaccuracies in its content. Information concerning equipment levels and specifications are subject to modification. The equipment features described in this technical guide are non-binding regarding the specification of the final product. Due to our policy of continually improving our products,
some features may have subsequently been changed or even removed. Please consult your local dealer for information about the
very latest equipment features. The images in this technical guide are for reference only. The illustrations also contain installation
components, accessories and special equipment that do not form 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 types and sizes are stated in
accordance with VDE. Output details apply to new appliances with clean heat exchangers.
2 | Technical guide WPL 19/24www.stiebel-eltron.com
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Technical guide 3
Air | water heat pumps
WPL 19/24 A/I/IK
This document contains fundamental, appliance-specific details and information. General engineering information can be found in the
heat pump technical guide and installation instructions, for example.
4 | Technical guide WPL 19/24www.stiebel-eltron.com
Air | water heat pumps
Appliance types and applications
WPL 19/24 IK
WPL 19/24 I
WPL 19/24 A
Appliance types and applications
Ideal for the following:
Single-family and two-family houses
Apartment buildings
Non-residential buildings
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Suitable for the following building projects:
New build
Modernisation, heating flow temperature < 55 °C
Modernisation, heating flow temperature < 70 °C
With the following functions and features:
Heating
Cooling
Inverter (output-dependent compressor control)
DHW heating with a floor mounted cylinder
DHW heating with a cylinder module
Mono mode DHW heating > 60 °C
Integral booster heater for mono energetic operation
Appliance installation
External installation
Indoor installation
Compact indoor installation
Split design
Little installation effort, compact
•
•
•
•
Flexible system solution for the following:
Heat pump and solar thermal system combination
Combination of several heat pumps (cascade)
Installation in tight spaces
Swimming pool water heating
Mono mode operation
Combination with other heat generators (dual mode)
www.stiebel-eltron.com
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Technical guide 5
Inverter air | water heat pumps
WPL 19/24 I
At a glance
»» Air | water heat pump installed indoors for heating in older
buildings
»» Inverter technology: Variable speed compressor for perfectly
matched heating output
»» Enhanced vapour injection/enhanced saturated vapour injection for high flow temperatures even at low outside temperatures
»» Optimised for the replacement of existing air | water heat
pumps 13/18/23 E installed indoors
»» Extended application range in modernisation projects and for
DHW heating thanks to high flow temperatures all year round
»» Low operating noise thanks to infinitely adjustable fan speed
and encapsulated refrigerant circuit
»» Can be integrated into a home network and controlled via
smartphone
»» Suitable for mono mode DHW heating for low running costs
»» Indoor installation means low sound emissions outdoors
APPLICATION: Inverter air | water heat pump with output-dependent control for indoor installation. Low sound emissions outdoors make it ideal for densely built-up areas. Can
be put to optimum use to provide DHW and heating in modernisation projects due to constantly high flow temperatures.
EQUIPMENT/CONVENIENCE: Optimum noise reduction due to encapsulated refrigerant circuit and isolated compressor. The wide
gaps between the evaporator fins create low air resistance and,
in combination with the modulating fan, result in a low sound
power level. The combined enhanced vapour injection/enhanced
saturated vapour injection cools the scroll compressor at low outside temperatures, enabling the maximum flow temperature to
be achieved all year round. In combination with the ISG (optional
accessory), the heat pump controller (accessory) can be used to
control the system via a home network or a mobile terminal device. With integral heat and electricity metering via refrigerant circuit data. An emergency/booster heater enables mono energetic
operation. The refrigerant circuit is hermetically sealed, tested for
tightness at the factory and filled with safety refrigerant R410A.
EFFICIENCY: The waste heat from the inverter is used to raise
the return temperature, thereby increasing the overall efficiency of the system. Demand-dependent and energy efficient defrosting by reversing the circuit. The condensate pan is
heated by the refrigerant circuit to enable efficient defrosting.
INSTALLATION: Integral anti-vibration mounts for direct connection to the heating system. The metal casing is corrosion-protected and made from galvanised, powder-coated sheet steel, with
an alpine white stove enamel finish.
Function
Heat is extracted from the outdoor air via the heat exchanger
(evaporator) on the air side across the entire application range
(see specification). The heating water is heated to the flow temperature in the heat exchanger on the water side (condenser) using electrical energy (compressor). At low air temperatures, the
humidity in the air precipitates as hoarfrost on the evaporator
fins. This hoarfrost is automatically defrosted. Water created by
this defrosting process collects in the defrost pan and is drained
off via a hose. The energy required for defrosting is drawn from
the heating system. The heat pump automatically reverts to heating mode at the end of the defrost cycle. The heat pump manager
and output control function match the heat pump heating output
variably to the actual heat demand.
Safety and quality
Required accessories
234727 WPM
6 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 IK
»» Enhanced vapour injection/enhanced saturated vapour injection for high flow temperatures even at low outside temperatures
APPLICATION: Inverter air | water heat pump with output-dependent control for indoor installation. Low sound emissions outdoors
make it ideal for densely built-up areas. Can be put to optimum
use to provide DHW and heating in modernisation projects due
to constantly high flow temperatures. The "IK" version includes
the compact air routing module with pre-installed air hoses on
the air intake and discharge, a controller and hydraulic components. It can therefore be quickly and neatly installed in corners.
EQUIPMENT/CONVENIENCE: Optimum noise reduction due to
encapsulated refrigerant circuit and isolated compressor. The
wide gaps between the evaporator fins create low air resistance
and, in combination with the modulating fan, result in a low
sound power level. The combined enhanced vapour injection/
enhanced saturated vapour injection cools the scroll compressor
at low outside temperatures, enabling the maximum flow temperature to be achieved all year round. In combination with the
ISG (optional accessory), the heat pump controller can be used
to control the system via a home network or a mobile device.
With integral heat and electricity metering via refrigerant circuit
data. An emergency/booster heater enables mono energetic operation. The refrigerant circuit is hermetically sealed, tested for
tightness at the factory and filled with safety refrigerant R410A.
EFFICIENCY: The waste heat from the inverter is used to raise
the return temperature, thereby increasing the overall efficiency of the system. Demand-dependent and energy efficient defrosting by reversing the circuit. The condensate pan is
heated by the refrigerant circuit to enable efficient defrosting.
INSTALLATION: Integral anti-vibration mounts for direct connection to the heating system. The metal casing is corrosion-protected and made from galvanised, powder-coated sheet steel, with
an alpine white stove enamel finish.
»» Optimised for the replacement of existing air | water heat
pumps 13/18/23 E installed indoors
Function
At a glance
»» Air | water heat pump installed indoors for heating in older
buildings
»» Inverter technology: Variable speed compressor for perfectly
matched heating output
»» Extended application range in modernisation projects and for
DHW heating thanks to high flow temperatures all year round
»» Low operating noise thanks to infinitely adjustable fan speed
and encapsulated refrigerant circuit
»» "IK" version has high level of integration for easy installation
in corners
»» Suitable for mono mode DHW heating for low running costs
»» Can be integrated into a home network and controlled via
smartphone
»» Indoor installation means low sound emissions outdoors
Safety and quality
Heat is extracted from the outdoor air via the heat exchanger
(evaporator) on the air side across the entire application range
(see specification). The heating water is heated to the flow temperature in the heat exchanger on the water side (condenser) using electrical energy (compressor). At low air temperatures, the
humidity in the air precipitates as hoarfrost on the evaporator
fins. This hoarfrost is automatically defrosted. Water created by
this defrosting process collects in the defrost pan and is drained
off via a hose. The energy required for defrosting is drawn from
the heating system. The heat pump automatically reverts to heating mode at the end of the defrost cycle. The heat pump manager
and output control function match the heat pump heating output
variably to the actual heat demand.
Required accessories
233837 AWG 560 H-SR
232956 AWG 560 H-GL
233838 AWG 560 V-SR
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Technical guide 7
Inverter air | water heat pumps
WPL 19/24 A
At a glance
»» Air | water heat pump installed outdoors for heating in older
buildings
»» Inverter technology: Variable speed compressor for perfectly
matched heating output
»» Enhanced vapour injection/enhanced saturated vapour injection for high flow temperatures even at low outside temperatures
»» Optimised for the replacement of existing air | water heat
pumps 13/18/23 E installed outdoors
»» Extended application range in modernisation projects and for
DHW heating thanks to high flow temperatures all year round
»» Low operating noise thanks to infinitely adjustable fan speed
and encapsulated refrigerant circuit
»» Can be integrated into a home network and controlled via
smartphone
»» High efficiency all year round for low running costs
»» Suitable for mono mode DHW heating for low running costs
Safety and quality
APPLICATION: Inverter air | water heat pump with output-dependent control, designed as a mono block appliance for outdoor
installation. Can be put to optimum use to provide DHW and central heating in modernisation projects due to constantly high flow
temperatures. The design enables the previous model to be directly
replaced and allows installation in an open space. In the "dB" version, the duct silencers for sound reduction at the intake and discharge apertures are included in the standard delivery. Depending on the version, this will reduce the sound level by up to 3 dB.
EQUIPMENT / CONVENIENCE: Optimum noise reduction due to encapsulated refrigerant circuit and isolated compressor. The wide
gaps between the evaporator fins create low air resistance and,
in combination with the modulating fan, result in a low sound
power level. The combined enhanced vapour injection/enhanced
saturated vapour injection cools the scroll compressor at low outside temperatures, enabling the maximum flow temperature to
be achieved all year round. In combination with the ISG (optional
accessory), the heat pump controller (accessory) can be used to
control the system via a home network or a mobile terminal device. With integral heat and electricity metering via refrigerant circuit data. An emergency/booster heater enables mono energetic
operation. The refrigerant circuit is hermetically sealed, tested for
tightness at the factory and filled with safety refrigerant R410A.
EFFICIENCY: The waste heat from the inverter is used to raise
the return temperature, thereby increasing the overall efficiency of the system. Demand-dependent and energy efficient defrosting by reversing the circuit. The condensate pan is
heated by the refrigerant circuit to enable efficient defrosting.
INSTALLATION: Integral anti-vibration mounts for direct connection to the heating system. The metal casing is corrosion-protected and made from galvanised, powder-coated sheet steel, with
an alpine white stove enamel finish.
Function
Heat is extracted from the outdoor air via the heat exchanger
(evaporator) on the air side across its entire operating range.
The heating water is heated to the flow temperature in the heat
exchanger on the water side (condenser) using electrical energy
(compressor) and made available to the heating circuit or the integrated DHW cylinder. At low air temperatures, the humidity in
the air precipitates as hoarfrost on the evaporator fins. This hoarfrost is automatically defrosted. Water created by this defrosting
process collects in the defrost pan and is drained off via a hose.
The energy required for defrosting is drawn from the heating system. The heat pump automatically reverts to heating mode at the
end of the defrost cycle.
Required accessories
234727 WPM
8 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 I
Indoor installation
Air routing with air hoses
The total length of hoses on the air intake and discharge sides
must not exceed 8 m. Never incorporate more than four 90° bends.
1
2
3
4
5
The hose will tend to sag because of its flexibility, therefore secure
it approx. every 1 m.
26_03_01_1466
Special hoses are used to route the intake air from the outside to
the heat pump and the discharge air from the heat pump to the
outdoors. These hoses are highly flexible, thermally insulated and
self-extinguishing in case of fire.
Air routing with air ducts
Concrete
Impact sound insulation
Floating screed
Floor covering
All-round recess
≥300
If the heat pump is installed in an enclosed room also containing a combustion appliance that draws its combustion air directly
from the room, a vent to the installation room with 250 cm² diameter must be provided to prevent the heat pump from influencing
the operation of the combustion equipment.
Without this additional vent, small, unavoidable leaks on the air
intake side, e.g. at hose connectors or at the heat pump, will reduce the air pressure in the enclosed room to unacceptable levels.
≥500
≥1000
≥500
www.stiebel-eltron.com
D0000019242.ai
To reduce the transfer of structure-borne noise to the building,
an air hose or canvas flange must be installed between the heat
pump and the air ducts. When sizing air ducts and grilles, observe the external pressure of the fan. At least 20 % of the total
external fan pressure must additionally be taken into account for
the air discharge side.
1
2
3
4
5
≥500
With air routing longer than 8 m, air ducts can also be connected
to the heat pump. The cross-section of the air duct varies according to the air flow rate and the externally available, static pressure
differential of the heat pump.
Technical guide 9
Inverter air | water heat pumps
WPL 19/24 I
1260
Indoor installation
d44
d44
800
619
d44
g02
g01
442
158
1240
195
b01
133
e02
D0000016755
233
e01
b01
d44
e01
e02
g01
g02
Entry electrical cables
Condensate drain outlet
Heating flow
Heating return
Air intake
Air discharge
Diameter
Diameter
mm
mm
WPL 19 I
WPL 24 I
28
28
28
28
10 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 I
≥2160
≥300
≥500
≥3000
≥1119
D0000019251
≥742
≥300
≥1750
≥2160
≥1750
Air routing without a shaft: Through an external wall | through two external walls around a corner
Method: Through an external wall to the outdoors with a horizontal wall outlet
AWG 560 H
290
430-465
340
422
725
D0000022330
D0000017268
510
830-865
Method: Through an external wall to the outdoors with a vertical wall outlet
430-465
340
www.stiebel-eltron.com
422
D0000017269
510
D0000022331
830-865
290
725
AWG 560 V
Technical guide 11
Inverter air | water heat pumps
WPL 19/24 I
Air routing with a shaft: Through an external wall | through two external walls around a corner
≥2160
≥1750
≥300
≥1750
≥600
≥2160
≥600
≥300
≥500
≥1000
≥3000
≥1119
D0000019250
≥742
≥1000
Method: Through a cellar wall into a shaft with a wall outlet
600-635
550
592
647
D0000017272
646
600-635
525
400
649
D0000022332
AWG 600 L
95
260
Method: Through a cellar wall into a shaft with a horizontal wall outlet
AWG 560 L
625
510
340
824
830-865
D0000022330
85
290
D0000017271
878
430-465
725
422
477
881
12 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 IK
Indoor installation
Air routing with air hoses
The total length of hoses on the air intake and discharge sides
must not exceed 8 m. Never incorporate more than four 90° bends.
1
2
3
4
5
The hose will tend to sag because of its flexibility, therefore secure
it approx. every 1 m.
26_03_01_1466
Special hoses are used to route the intake air from the outside to
the heat pump and the discharge air from the heat pump to the
outdoors. These hoses are highly flexible, thermally insulated and
self-extinguishing in case of fire.
Air routing with air ducts
To reduce the transfer of structure-borne noise to the building,
an air hose or canvas flange must be installed between the heat
pump and the air ducts. When sizing air ducts and grilles, observe the external pressure of the fan. At least 20 % of the total
external fan pressure must additionally be taken into account for
the air discharge side.
1
2
3
4
5
Concrete
Impact sound insulation
Floating screed
Floor covering
All-round recess
≥500
With air routing longer than 8 m, air ducts can also be connected
to the heat pump. The cross-section of the air duct varies according to the air flow rate and the externally available, static pressure
differential of the heat pump.
If the heat pump is installed in an enclosed room also containing a combustion appliance that draws its combustion air directly
from the room, a vent to the installation room with 250 cm² diameter must be provided to prevent the heat pump from influencing
the operation of the combustion equipment.
≥300
Without this additional vent, small, unavoidable leaks on the air
intake side, e.g. at hose connectors or at the heat pump, will reduce the air pressure in the enclosed room to unacceptable levels.
≥500
www.stiebel-eltron.com
D0000022102
≥1000
≥500
Technical guide 13
Inverter air | water heat pumps
WPL 19/24 IK
Indoor installation
300-500
300-500
800
1820
1555
1280
1365
b01
1240
g02
470 ±50
400 ±50
g01
D0000016719
e02
270
c11
120
e01
180
e23
255
310
e22
660
b01
Entry electrical cables
c11
e01
e02
e22
e23
g01
g02
Safety assembly
Heating flow
Heating return
Cylinder flow
Cylinder return
Air intake
Air discharge
Male thread
Male thread
Male thread
Male thread
WPL 19 IK
WPL 24 IK
G 1 1/4 A
G 1 1/4 A
G 1 1/4 A
G 1 1/4 A
G 1 1/4 A
G 1 1/4 A
G 1 1/4 A
G 1 1/4 A
14 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 IK
Air routing without a shaft: Through two external walls around a corner
1370
≥300
≥500
D0000022341
≥770
≥900
Method: Through an external wall to the outdoors with a horizontal wall outlet
AWG 560 H
290
430-465
340
422
725
D0000022330
D0000017268
510
830-865
Method: Through an external wall to the outdoors with a vertical wall outlet
430-465
340
www.stiebel-eltron.com
422
D0000017269
510
D0000022331
830-865
290
725
AWG 560 V
Technical guide 15
Inverter air | water heat pumps
WPL 19/24 IK
Air routing with a shaft: Through two external walls around a corner
≥600
≥600
1370
≥300
≥500
D0000022321
≥1000
≥770
≥1000
≥900
Method: Through a cellar wall into a shaft with a wall outlet
600-635
550
592
647
D0000017272
646
600-635
525
400
649
D0000022332
AWG 600 L
95
260
Method: Through a cellar wall into a shaft with a horizontal wall outlet
AWG 560 L
625
510
340
824
830-865
D0000022330
85
290
D0000017271
878
430-465
725
422
477
881
16 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 A
General information
271
171
Ensure that the substrate on which the heat pump is to be installed is horizontal, level, solid and permanent. The entire heat
pump frame should be in contact with the substrate. Uneven substrates can increase the noise emissions from the heat pump. The
heat pump must be accessible from all sides.
Recommended substrate:
103
Foundation
d02 d01
»» Cast concrete foundation
1
»» Kerbstones
3
1240
»» Stone slabs
360
Provide a recess (space) underneath the heat pump to enable
pipes and cables to be connected from below.
120
220
5
Protection of heating water lines against frost and moisture
45
Outdoor installation
4
Some frost protection is provided by the frost stat inside the heat
pump, which automatically starts the circulation pump in the heat
pump circuit at <+10 °C and thereby safeguards DHW circulation
in all water-bearing components.
Fill the heating system with antifreeze if the power supply cannot
be guaranteed for a longer period of time.
Condensate drain
D0000071545
800
In outdoor installations, protect the flow and return lines against
frost by means of adequate thermal insulation and by routing
them inside conduits to protect them against moisture. Insulation
thickness in accordance with the Energy Saving Ordinance.
2
1
2
3
4 Cable/line entry
d01 Heat pump flow
d02 Heat pump return
Air discharge
Air intake
Main wind direction
Route the condensate drain hose with a steady fall out of the bottom or side of the heat pump.
With outdoor installation, route the condensate to an existing
drain or into a coarse gravel soakaway. For this, ensure the installation is free from the risk of frost.
230
8
A
4
7
5
A
1
2
3
4
www.stiebel-eltron.com
Depth of frost line
Heating flow
Heating return
Conduit for supply lines
Foundation
2
6
5
6
7
8
D0000071547
1
3
Gravel bed
Condensate drain conduit
Condensate drain
Connecting cable
Technical guide 17
Inverter air | water heat pumps
WPL 19/24 A
Outdoor installation
i21
WPL 19 A
WPL 24 A
Air intake
Air discharge
Entry supply line
≥700
g01
g02
i21
i21
D0000016756
g02
g01
≥2000
≥500
≥1000
D0000019241
≥500
18 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 A/I/IK
WPL 19 I WPL 24 I WPL 19 IK
235193
Heating output
Heating output at A7/W35 (min./max.)
Heating output at A2/W35 (min./max.)
Heating output at A-7/W35 (min./max.)
Heating output at A20/W35 (EN 14511)
Heating output at A20/W55 (EN 14511)
Heating output at A10/W35 (EN 14511)
Heating output at A7/W35 (EN 14511)
Heating output at A7/W55 (EN 14511)
Heating output at A2/W35 (EN 14511)
Heating output at A2/W55 (EN 14511)
Heating output at A-7/W35 (EN 14511)
Heating output at A-7/W55 (EN 14511)
Heating output at A-15/W35 (EN 14511)
Heating output at A-15/W55 (EN 14511)
Heating output at A-20/W35 (EN 14511)
Heating output at A-20/W55 (EN 14511)
Max. heating output in silent mode at A-7/W35
Max. heating output in silent mode at A-7/W55
Power consumption
Power consumption at A20/W35 (EN 14511)
Power consumption at A20/W55 (EN 14511)
Power consumption at A10/W35 (EN 14511)
Power consumption at A7/W35 (EN 14511)
Power consumption at A7/W55 (EN 14511)
Power consumption at A2/W35 (EN 14511)
Power consumption at A2/W55 (EN 14511)
Power consumption at A-7/W35 (EN 14511)
Power consumption at A-7/W55 (EN 14511)
Power consumption at A-15/W35 (EN 14511)
Power consumption at A-15/W55 (EN 14511)
Power consumption at A-20/W35 (EN 14511)
Power consumption at A-20/W55 (EN 14511)
Coefficient of performance
COP at A20/W35 (EN 14511)
COP at A20/W55 (EN 14511)
COP at A10/W35 (EN 14511)
COP at A7/W35 (EN 14511)
COP at A7/W55 (EN 14511)
COP at A2/W35 (EN 14511)
COP at A2/W55 (EN 14511)
COP
at A-7/W35 (EN 14511)
COP at A-7/W55 (EN 14511)
COP at A-15/W35 (EN 14511)
COP at A-15/W55 (EN 14511)
COP at A-20/W35 (EN 14511)
COP at A-20/W55 (EN 14511)
www.stiebel-eltron.com
kW
kW
kW
kW
kW
kW
kW
235194
6.7/12.35 6.70/15.73
7.19/11.2 7.19/14.75
7.69/9.95 7.69/13.54
7.54
7.54
7.89
7.89
7.14
7.14
6.70
7.41
235878
WPL 24 WPL 19 A WPL 24 A
IK
235879
236412
236413
6.7/12.35 6.7/15.73
7.19/11.2 7.19/14.75
7.69/9.95 7.69/13.54
7.54
7.54
7.89
7.89
7.14
7.14
6.70
7.41
6.7/12.35 6.70/15.73
7.19/11.2 7.19/14.75
7.69/9.95 7.69/13.54
7.54
7.54
7.89
7.89
7.14
7.14
6.70
7.41
WPL 19
A SR
236414
WPL 24
A SR
236415
6.7/12.35 6.70/15.73
7.19/11.2 7.19/14.75
7.69/9.95 7.69/13.54
7.54
7.54
7.89
7.89
7.14
7.14
6.70
7.41
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
8.59
7.41
7.25
9.91
10.58
8.53
9.21
7.67
8.35
8.29
8.79
10.42
9.04
10.38
13.45
15.46
12.98
12.55
9.38
11.40
8.38
8.88
8.59
7.41
7.25
9.91
10.58
8.53
9.21
7.67
8.35
8.29
8.79
10.42
9.04
10.38
13.45
15.46
12.98
12.55
9.38
11.40
8.38
8.88
8.59
7.41
7.25
9.91
10.58
8.53
9.21
7.67
8.35
8.29
8.79
10.42
9.04
10.38
13.45
15.46
12.98
12.55
9.38
11.40
8.38
8.88
8.59
7.41
7.25
9.91
10.58
8.53
9.21
7.67
8.35
8.29
8.79
10.42
9.04
10.38
13.45
15.46
12.98
12.55
9.38
11.40
8.38
8.88
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
1.21
2.22
1.30
1.34
2.60
1.80
2.56
2.98
4.24
2.91
4.17
2.86
4.12
1.21
2.21
1.30
1.57
3.17
2.24
3.57
4.49
6.59
4.83
6.07
3.56
5.88
1.21
2.22
1.30
1.34
2.60
1.80
2.56
2.98
4.24
2.91
4.17
2.86
4.12
1.21
2.21
1.30
1.57
3.17
2.24
3.57
4.49
6.59
4.83
6.07
3.56
5.88
1.21
2.22
1.30
1.34
2.60
1.80
2.56
2.98
4.24
2.91
4.17
2.86
4.12
1.21
2.21
1.30
1.57
3.17
2.24
3.57
4.49
6.59
4.83
6.07
3.56
5.88
1.21
2.22
1.30
1.34
2.60
1.80
2.56
2.98
4.24
2.91
4.17
2.86
4.12
1.21
2.21
1.30
1.57
3.17
2.24
3.57
4.49
6.59
4.83
6.07
3.56
5.88
6.21
3.56
5.48
4.99
3.30
4.12
2.84
3.32
6.21
3.56
5.48
4.72
3.19
4.00
2.91
3.00
6.21
3.56
5.48
4.99
3.30
4.12
2.84
3.32
6.21
3.56
5.48
4.72
3.19
4.00
2.91
3.00
6.21
3.56
5.48
4.99
3.30
4.12
2.84
3.32
6.21
3.56
5.48
4.72
3.19
4.00
2.91
3.00
6.21
3.56
5.48
4.99
3.30
4.12
2.84
3.32
6.21
3.56
5.48
4.72
3.19
4.00
2.91
3.00
2.49
2.93
2.21
2.68
2.03
2.34
2.69
2.07
2.63
1.94
2.49
2.93
2.21
2.68
2.03
2.34
2.69
2.07
2.63
1.94
2.49
2.93
2.21
2.68
2.03
2.34
2.69
2.07
2.63
1.94
2.49
2.93
2.21
2.68
2.03
2.34
2.69
2.07
2.63
1.94
Technical guide 19
Inverter air | water heat pumps
WPL 19/24 A/I/IK
WPL 19 I WPL 24 I WPL 19 IK
WPL 24 WPL 19 A WPL 24 A
IK
WPL 19
A SR
WPL 24
A SR
Sound emissions
Sound power level for indoor installation (EN 12102)
Max. sound power level for indoor installation
Sound power level for indoor installation, air intake/discharge
(EN 12102)
Max. sound power level for indoor installation, air intake/
discharge
Max. sound power level, air intake/discharge, silent mode
(EN 12102)
dB(A)
dB(A)
dB(A)
54
58
46/48
54
63
47/49
52
57
50/52
54
61
49/51
dB(A)
50/51
54/55
55/56
57/58
dB(A)
39/42
40/43
45/46
47/48
Sound power level for outdoor installation (EN 12102)
Max. sound power level for outdoor installation
Max. sound power level for outdoor installation, silent mode
Application limits
Min. application limit, heat source
Max. application limit, heat source
Min. application limit on the heating side
Max. application limit on the heating side
Energy data
Energy efficiency class
Electrical data
Max. power consumption without emergency/booster heater
Frequency
Starting current (with/without starting current limiter)
Compressor fuse/MCB
Control unit fuse/MCB
Control unit phases
Emergency/booster heater phases
Compressor phases
Rated voltage, compressor
Rated voltage, emergency/booster heater
Rated voltage, control unit
Max. operating current
Max. phase angle cos(phi)
Versions
Refrigerant
Refrigerant charge
Global warming potential of the refrigerant (GWP100)
CO2 equivalent (CO2e)
Frost protection
Defrost type
dB(A)
dB(A)
dB(A)
Casing panels in standard delivery
Compact air routing module in standard delivery
Integral circulation pump
Integral heat pump manager
Safety assembly in standard delivery
Dimensions
Height (standard appliance)
Width (standard appliance)
Depth (standard appliance)
Height (indoor installation)
Width (indoor installation)
Depth (indoor installation)
Height (outdoor installation)
Width (outdoor installation)
Depth (outdoor installation)
°C
°C
°C
°C
-20
40
15
65
-20
40
15
65
A++/A++ A++/A++
kW
Hz
A
A
A
V
V
V
A
kg
t
mm
mm
mm
mm
mm
mm
mm
mm
mm
-20
40
15
65
-20
40
15
65
59
63
56
59
67
56
59
63
56
59
67
56
-20
40
15
65
-20
40
15
65
-20
40
15
65
-20
40
15
65
A++/A++ A++/A++ A++/A++ A++/A++ A++/A++ A++/A++
7.5
50
5/3 x B 16
1 x B 16
1/N/PE
3/N/PE
3/N/PE
400
400
230
12
0.96
7.5
50
5/3 x B 16
1 x B 16
1/N/PE
3/N/PE
3/N/PE
400
400
230
12
0.96
7.5
50
5/3 x B 16
1 x B 16
1/N/PE
3/N/PE
3/N/PE
400
400
230
12
0.96
7.5
50
5/3 x B 16
1 x B 16
1/N/PE
3/N/PE
3/N/PE
400
400
230
12
0.96
7.5
50
5/3 x B 16
1 x B 16
1/N/PE
3/N/PE
3/N/PE
400
400
230
12
0.96
7.5
50
5/3 x B 16
1 x B 16
1/N/PE
3/N/PE
3/N/PE
400
400
230
12
0.96
7.5
50
5/3 x B 16
1 x B 16
1/N/PE
3/N/PE
3/N/PE
400
400
230
12
0.96
7.5
50
5/3 x B 16
1 x B 16
1/N/PE
3/N/PE
3/N/PE
400
400
230
12
0.96
R410 A
4.75
2088
9.92
X
Circuit
reversal
X
-
R410 A
4.75
2088
9.92
X
Circuit
reversal
X
-
R410 A
4.75
2088
9.92
X
Circuit
reversal
X
X
X
X
X
R410 A
4.75
2088
9.92
X
Circuit
reversal
X
X
X
X
X
R410 A
4.75
2088
9.92
X
Circuit
reversal
X
-
R410 A
4.75
2088
9.92
X
Circuit
reversal
X
-
R410 A
4.75
2088
9.92
X
Circuit
reversal
X
-
R410 A
4.75
2088
9.92
X
Circuit
reversal
X
-
1116
784
1182
1182
800
1240
1116
784
1182
1182
800
1240
1116
784
1182
1820
800
1240
1116
784
1182
1820
800
1240
1116
784
1182
1116
784
1182
1116
784
1182
1116
784
1182
1435
1240
1280
1435
1240
1280
1435
1240
1280
1435
1240
1280
20 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 A/I/IK
WPL 19 I WPL 24 I WPL 19 IK
WPL 24 WPL 19 A WPL 24 A
IK
WPL 19
A SR
WPL 24
A SR
Weight
Weight (standard appliance)
Total weight, indoor installation
Connections
Air hose intake and discharge connectors
Water quality requirements
Water hardness
pH value (with aluminium fittings)
pH value (without aluminium fittings)
Chloride
Conductivity (softening)
Conductivity (desalination)
Oxygen 8-12 weeks after filling (softening)
Oxygen 8-12 weeks after filling (desalination)
Values
Heating flow rate (EN 14511) for A7/W35, B0/W35 and 5 k
Nominal heating flow rate for A-7/W35 and 7 k
Nominal internal pressure drop, heating
Min. heating flow rate
Flow rate on heat source side
Total available external pressure differential on heat source side
www.stiebel-eltron.com
kg
kg
201
289
201
289
201
373
201
373
201
201
201
201
DN 560
DN 560
DN 560
DN 560
°dH
≤3
8.0-8.5
8.0-10.0
≤3
8.0-8.5
8.0-10.0
≤3
8.0-8.5
8.0-10.0
≤3
8.0-8.5
8.0-10.0
≤3
8.0-8.5
8.0-10.0
≤3
8.0-8.5
8.0-10.0
≤3
8.0-8.5
8.0-10.0
≤3
8.0-8.5
8.0-10.0
mg/l
μS/cm
μS/cm
mg/l
mg/l
≤30
<1000
20-100
<0.02
<0.1
<30
<1000
20-100
<0.02
<0.1
<30
<1000
20-100
<0.02
<0.1
<30
<1000
20-100
<0.02
<0.1
≤30
<1000
20-100
<0.02
<0.1
<30
<1000
20-100
<0.02
<0.1
≤30
<1000
20-100
<0.02
<0.1
<30
<1000
20-100
<0.02
<0.1
m³/h
m³/h
hPa
m³/h
m³/h
hPa
1.17
1.21
212
1
2300
1.15
1.25
1.65
270
1
2300
1.2
1.17
1.21
1.25
1.65
1
2300
1.15
1
2300
1.2
1.17
1.21
212
1
2300
1.25
1.65
270
1
2300
1.17
1.21
212
1
2300
1.25
1.65
270
1
2300
Technical guide 21
Inverter air | water heat pumps
WPL 19/24 A/I/IK
Output data
WPL 19 A/I/IK
Heating output
20
15
1
10
2
3
4
5
-20
X
Y
1
-15
-10
-5
0
5
2
3
4
Outside temperature [°C]
Heating output [kW]
max. W55
10
15
D0000067531
0
20
max. W35
min. W55
min. W35
DHW output
16
14
12
10
8
1
4
6
4
0
-20
X
Y
Outside temperature [°C]
DHW output [kW]
-10
0
10
20
1
4
30
40
D0000067531
2
max. W55
min. W55
22 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 A/I/IK
Output data
WPL 24 A/I/IK
Heating output
20
15
1
10
2
3
4
5
-20
X
Y
1
-15
-10
-5
0
5
2
3
4
Outside temperature [°C]
Heating output [kW]
max. W55
10
15
D0000064861
0
20
max. W35
min. W55
min. W35
DHW output
16
14
12
10
8
1
4
6
4
0
-20
X
Y
-10
Outside temperature [°C]
DHW output [kW]
www.stiebel-eltron.com
0
10
20
1
4
30
40
D0000064861
2
max. W55
min. W55
Technical guide 23
Inverter air | water heat pumps
WPL 19/24 A/I/IK
Heat pump with instantaneous water cylinder, indoor installation
Heating connection
Install the heat consumer system (WNA) in accordance with the
technical guides.
40
50 60 7080
40
50 60 7080
30
90
30
90
20
100
20
100
Connect the heat pump into the water side of heating systems in
accordance with the standard circuit diagram.
A
Observe the correct connection of heating flow and return as well
as the correct pipework cross-section.
B
AB
A
B
AB
Prior to connecting the heat pump, thoroughly flush the heating
system, check for tightness and carefully vent it.
Heat pump compact installation and circulation pump
When using a heat pump compact installation, select the circulation pump that suits the heat pump.
Circulation pump for the heat pump with WPKI 5
Heat pump with buffer cylinder and DHW heating, indoor
installation
40
WPL 19 I
WPL 24 A
WPL 24 I
1.17
1.17
1.25
1.25
Pressure
differential
Circulation pump
hPa
120
120
120
120
Copper pipe
DN
UP 25/7.5
PVC
28 x 1.5
UP 25/7.5
PVC
28 x 1.5
UP 25/7.5
PVC
28 x 1.5
UP 25/7.5
PVC
28 x 1.5
The sizing is based on a single pipe length of 10 m, the stated
heating circuit pump and the pipe diameter. A different heating
circuit pump must be used for longer pipelines.
50 60 7080
40
50 60 7080
30
90
30
90
20
100
20
100
D0000071962
WPL 19 A
m3/h
Flow rate
D0000072228
Fit thermal insulation in accordance with the Energy Saving Ordinance [Germany].
Heat pump with buffer cylinder and DHW heating, outdoor
installation
40
50 60 7080
40
50 60 7080
90
30
90
20
100
20
100
D0000071963
30
24 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 A/I/IK
Minimum flow rate for systems with a buffer cylinder
When using a buffer cylinder, in menu "SETTINGS / HEATING /
STANDARD SETTINGS", set parameter "BUFFER OPERATION" to
"ON".
In combination with a hydraulic module, cylinder and hydraulic
module or integral cylinder:
ff
In menu "COMMISSIONING / HEATING", set parameter "HEATING CIRC PUMP RATE" so that the nominal flow rate required
for system operation is assured (see chapter "Specification /
Data table").
If the appliance is operated on its own with a WPM:
ff
Set the heating circuit pump so that the nominal flow rate required for system operation is assured.
The current flow rate can be called up in the menu "INFO / HEAT
PUMP INFO / PROCESS DATA" under "WP WATER FLOW RATE".
Sizing the underfloor heating system in the lead room with individual room control
WPL 19 A WPL 19 I WPL 19 IK WPL 24 A WPL 24 I
Minimum flow rate
Buffer cylinder always required
Lead room floor area (composite pipework 16x2 mm, installation spacing 10 cm)
Number of circuits (composite pipework 16x2 mm, installation spacing 10 cm)
Lead room floor area (composite pipework 20x2.25 mm, installation spacing 15 cm)
Number of circuits (composite pipework 20x2.25 mm, installation spacing 15 cm)
Activate the integral emergency/booster heater
Minimum water content of the buffer cylinder or the open circuits
Recommended buffer cylinder volume, underfloor heating system
Recommended buffer cylinder volume, radiators
www.stiebel-eltron.com
l/h
m²
nxm
m²
nxm
l
l
l
WPL 24
IK
1000
1000
1000
1000
1000
1000
yes
yes
46
100
100
yes
yes
46
100
100
yes
yes
46
100
100
yes
yes
57
100
100
yes
yes
57
100
100
yes
yes
57
100
100
Technical guide 25
Inverter air | water heat pumps
WPL 19/24 A/I/IK
Electrical connection
Note
Observe the standards and regulations applicable in
your country.
Cable cross-sections and MCB/fuse ratings
MCB/fuse
rating
Assignment
16 A
2.5 mm²
3x C 16 A
1.5 mm² for only two live wires and routing
on a wall or in an electrical conduit on a
wall.
2.5 mm²
Notify the local power supply utility of the heat pump connection.
All electrical installation work, particularly earthing measures,
must be carried out in accordance with VDE regulations and the
requirements of the local power supply utility.
Cable cross-section
The connection must comply with the electrical connection diagram. For this, also observe the installation instructions for the
heat pump manager.
3x B 16 A
Outdoor installation
1x B 16 A
Compressor
(3-phase)
Electric
emergency/
booster heater
Control unit
2.5 mm²
1.5 mm²
Use only electrical cables that are weather-resistant to VDE 0100.
Route cables up to the heat pump through a conduit.
Route cables into the heat pump from below.
Indoor installation
Route cables into the heat pump through the cable entries.
Note
The appliance includes an inverter for the variable speed
compressor. In the event of a fault, inverters can cause DC
residual currents. If RCDs are provided, they have to be
type B AC/DC-sensitive.
A DC residual current can block type A RCDs.
ff
Ensure that the appliance power supply is disconnected from the distribution board.
26 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 A/I/IK
www.stiebel-eltron.com
Technical guide 27
AE1-00-00-00-11-11-10-E1
AE1-00-00-00-11-11-10-H1
Inverter air | water heat pumps
WPL 19/24 A/I/IK
28 | Technical guide WPL 19/24www.stiebel-eltron.com
AE1-00-00-00-31-31-10-E1
AE1-00-00-00-31-31-10-H1
Inverter air | water heat pumps
WPL 19/24 A/I/IK
www.stiebel-eltron.com
Technical guide 29
AE1-00-00-02-21-21-10-E1
AE1-00-00-02-21-21-10-H1
Inverter air | water heat pumps
WPL 19/24 A/I/IK
30 | Technical guide WPL 19/24www.stiebel-eltron.com
AK1-00-00-00-11-11-10-E1
AK1-00-00-00-11-11-10-H1
Inverter air | water heat pumps
WPL 19/24 A/I/IK
www.stiebel-eltron.com
Technical guide 31
AK1-00-00-00-21-21-10-E1
AK1-00-00-00-21-21-10-H1
Inverter air | water heat pumps
WPL 19/24 A/I/IK
32 | Technical guide WPL 19/24www.stiebel-eltron.com
Inverter air | water heat pumps
WPL 19/24 A/I/IK
Key
Pos.
I
II
III
IV
V
VI
VII
VIII
IX
WPMsystem
Source
Heating circuit without mixer
Heating circuit with mixer
Cold water connection
DHW connection
Pasteurisation pump
Swimming pool
Solar collector
Differential control
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
1.11
1.12
1.13
1.14
1.15
1.16
1.17
1.18
1.19
CAN A
CAN B
Outside temperature sensor
Buffer or heating circuit sensor 1
Flow sensor
Heating circuit sensor 2
Heating circuit sensor 3
DHW cylinders
Source sensor
2nd heat generator sensor
Cooling flow
DHW circulation sensor
FE 7 remote control
Analogue input 1, 0...10 V or 4...20 mA
Analogue input 2, 0...10 V or 4...20 mA
PWM output 1
PWM output 2
CAN B
CAN A
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
2.13
2.14
2.15
Power supply
Power supply utility input / pumps L
Heating circuit pump 1
Heating circuit pump 2
Heating circuit pump 3
Buffer charging pump 1
Buffer charging pump 2
DHW charging pump
Source pump / defrost
Fault output
2nd heat generator, DHW
2nd heat source heating
Cooling
Heating circuit mixer 2
Heating circuit mixer 3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
3.12
3.13
3.14
3.15
3.16
3.17
3.18
3.19
CAN A
CAN B
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
4.13
4.14
4.15
Power supply
Power supply utility input / pumps L
Heating circuit pump 4
Heating circuit pump 5
DHW charging pump 2
Buffer charging pump 3
Buffer charging pump 4
Buffer charging pump 5
Buffer charging pump 6
Output differential controller 1, thermostat 1
Output differential controller 2, thermostat 2
Swimming pool primary pump
Swimming pool secondary pump
Heating circuit mixer 4
Heating circuit mixer 5
Primary swimming pool sensor
Secondary swimming pool sensor
Heating circuit sensor 4
Heating circuit sensor 5
DHW cylinder sensor 2
Differential sensor 1 / thermostat 1
Differential sensor 1.2
Differential sensor 2 / thermostat 2
Differential sensor 2.2
Analogue input 3, 0...10 V or 4...20 mA
Analogue input 4, 0...10 V or 4...20 mA
PWM output 3
PWM output 4
CAN B
CAN A
Key
Pos.
WPM 3
Key
Pos.
WPM 3
1
2
2-1
2a
2b
2c
2d
2e
2f
2g
2h
2k
2s
Heat pump
WPM3
MSM
Outside temperature sensor
Return temperature sensor
Flow temperature sensor
DHW temperature sensor
Heating circuit temperature sensor for mixer
Temperature sensor, heat generator 2
Heat source sensor
Swimming pool temperature sensor
Solar collector sensor
Solar cylinder sensor/cooling sensor
3
3a
3b
3c
3d
3e
3f
3g
Circulation pump for the heat pump – source
Circulation pump for the heat pump, heating
Circulation pump for DHW heating
Circulation pump, heating circuit 1
Circulation pump, heating circuit 2
Circulation pump for swimming pool heating
Circulation pump for the solar thermal system
Circulation pump for solid fuel boilers
www.stiebel-eltron.com
Technical guide 33
Notes 34 | Technical guide WPL 19/24www.stiebel-eltron.com
Notes www.stiebel-eltron.com
Technical guide 35
STIEBEL ELTRON GmbH & Co. KG | Dr.-Stiebel-Strasse 33
37603 Holzminden | www.stiebel-eltron.de
2018
D0000074753-c
www.stiebel-eltron.com
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