STIEBEL ELTRON | Engineering and WPL 15/20/25 ACS | Installation manual | Stiebel Eltron Engineering and WPL 15/20/25 ACS Installation Manual

Stiebel Eltron Engineering and WPL 15/20/25 ACS Installation Manual
DHW
Renewables
Air conditioning
Engineering and installation
WPL 15/20/25 ACS
Room heating
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 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
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Technical guide | 3
Air | water heat pumps
Appliance types and applications
WPL A/AS
WPL AC/ACS
Appliance types and applications
Ideal for the following:
Detached and two-family house
Apartment building
Non-residential building
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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
Outdoor installation
Little installation effort, compact
Flexible system solution for the following:
Heat pump and solar thermal system combination
Combination with solar thermal system
Combination of several heat pumps (cascade)
Installation in tight spaces
Swimming pool water heating
Mono mode operation
Mono energetic operation
Combination with other heat generators (dual mode)
4 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
At a glance
»» Air | water heat pump installed outdoors for heating and cooling
»» 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
»» Low operating noise thanks to infinitely adjustable fan speed
and encapsulated refrigerant circuit
»» Active cooling through refrigerant circuit reversal for a comfortable indoor environment
»» High efficiency all year round for low running costs
»» Mono mode DHW heating possible for low running costs
»» Can be integrated into a home network and controlled via
smartphone
Safety and quality
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APPLICATION: Inverter air | water heat pump with output-dependent
control, designed as a mono block appliance for compact outdoor
installation. Can be used for heating and DHW operation; the AC
version also provides efficient cooling via circuit reversal. Suitable
for new build and modernisation due to the 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 a higher heating output/flow temperature to be achieved. 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 through circuit reversal. 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. Pivoting electrical connection panel for
better accessibility. Quick access to the condensate pan via cleaning aperture at the rear. The metal casing is corrosion-protected
and made from galvanised, powder coated sheet steel, with an
alpine white stove enamel finish. The fan grille, recessed grips
and cover are made from weatherproof and UV-resistant plastic
in aluminium white.
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.
Technical guide | 5
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
Specification
WPL 15 AS WPL 15 ACS
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 A7/W35 (EN 14511)
Heating output at A2/W35 (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 in silent mode at A-7/W35 (70 %)
Max. heating output in silent mode at A-7/W35
Max. cooling capacity at A35/W7
Cooling capacity at A35/W7 partial load
Max. cooling capacity at A35/W18
Cooling capacity at A35/W18 partial load
Power consumption
Power consumption at A7/W35 (EN 14511)
Power consumption at A2/W35 (EN 14511)
Power consumption at A-7/W35 (EN 14511)
Power consumption at A-15/W35 (EN 14511)
Power consumption at A-7/W55 (EN 14511)
Max. power consumption, fan heating
Power consumption, emergency/booster heater
Coefficient of performance
COP at A7/W35 (EN 14511)
COP at A2/W35 (EN 14511)
COP at A-7/W35 (EN 14511)
COP at A-15/W35 (EN 14511)
COP at A-7/W55 (EN 14511)
SCOP (EN 14825)
Max. cooling capacity factor at A35/W7
Cooling capacity factor at A35/W7 partial load
Max. cooling capacity factor at A35/W18
Cooling capacity factor at A35/W18 partial load
Sound emissions
Sound power level (EN 12102)
Sound pressure level at 5 m in free field
Max. sound power level for outdoor installation
Sound power level in silent mode 70 %
Max. sound power level, 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 heating side
Application limit, heat source at W65
Min. cooling mode application limit for outside temperature
Max. cooling mode application limit for outside temperature
Energy data
Energy efficiency class
WPL 20 A
WPL 20 AC
WPL 25 A
WPL 25 AC
236638
236639
236640
236641
236644
236645
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
kW
3.50/7.40
3.10/7.09
2.50/6.86
4.28
4.23
6.86
7.09
6.16
4.80
4.30
3.50/7.40
3.10/7.09
2.50/6.86
4.28
4.23
6.86
7.09
6.16
4.80
4.30
7.86
2.15
8.66
3.25
6.13/11.19
4.59/10.71
4.40/9.54
6.13
6.83
9.54
10.73
8.51
7.10
7.10
6.13/11.19
4.59/10.71
4.40/9.54
6.13
6.83
9.54
10.73
8.51
7.10
7.10
11.49
4.80
15.26
6.76
6.13
4.59/13.64
4.40/12.86
7.84
8.33
12.86
13.93
12.05
9.00
7.85
6.13/14.00
4.59/13.64
4.40/12.86
7.84
8.33
12.86
13.93
12.05
9.00
7.85
14.88
4.80
17.06
6.76
kW
kW
kW
kW
kW
kW
kW
0.94
1.09
2.42
2.45
3.38
0.1
6.2
0.94
1.09
2.42
2.45
3.38
0.1
6.2
1.37
1.71
2.93
2.91
4.10
0.2
8.8
1.37
1.71
2.93
2.91
4.10
0.2
8.8
1.54
2.00
4.16
4.48
5.76
0.2
8.8
1.54
2.00
4.16
4.48
5.76
0.2
8.8
4.55
3.88
2.83
2.51
2.10
4.20
4.55
3.88
2.83
2.51
2.10
4.48
2.41
2.39
2.87
3.78
4.48
4.00
3.26
2.92
2.62
4.30
4.48
4.00
3.26
2.92
2.62
4.48
2.53
2.84
3.12
3.76
5.09
4.17
2.93
2.69
2.42
4.65
5.09
4.17
2.93
2.69
2.42
4.78
2.38
2.84
2.83
3.76
dB(A)
dB(A)
dB(A)
dB(A)
dB(A)
50
28
61
52
50
50
28
61
52
50
54
32
66
54
54
54
32
66
54
54
54
32
66
57
54
54
32
66
57
54
°C
°C
°C
°C
°C
°C
°C
-20
40
15
65
-20
-20
40
15
65
-20
15
40
-20
40
15
65
-20
-20
40
15
65
-20
15
40
-20
40
15
65
-20
-20
40
15
65
-20
15
40
A+/A++
A++/A++
A++/A++
A++/A++
A++/A++
A++/A++
6 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
WPL 15 AS WPL 15 ACS
WPL 20 A
WPL 20 AC
WPL 25 A
WPL 25 AC
Electrical data
Max. power consumption without emergency/booster heater
Rated voltage, compressor
Rated voltage, control unit
Rated voltage, emergency/booster heater
Compressor phases
Control unit phases
Emergency/booster heater phases
Compressor fuse protection
Control unit fuse protection
Fuse protection, emergency/booster heater
Starting current
Max. operating current
Versions
Refrigerant
Refrigerant charge
CO2 equivalent (CO2e)
Global warming potential of the refrigerant (GWP100)
IP rating
Condenser material
Dimensions
Height
Width
Depth
Weights
Weight
Connections
Connection, heating flow/return
Water quality requirements
Water hardness
pH value (with aluminium fittings)
pH value (without aluminium fittings)
Conductivity (softening)
Conductivity (desalination)
Chloride
Oxygen 8-12 weeks after filling (softening)
Oxygen 8-12 weeks after filling (desalination)
Values
Permissible operating pressure, heating circuit
Flow rate on heat source side
Heating flow rate (EN 14511) at A7/W35, B0/W35 and 5 K
Nominal heating flow rate at A-7/W35 and 7 K
Nominal internal pressure drop, heating
Min. heating flow rate
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kW
V
V
V
4.9
230
230
230
1/N/PE
1/N/PE
2/N/PE
1 x B 20
1 x B 16
2 x B 16
7
19.5
4.9
230
230
230
1/N/PE
1/N/PE
2/N/PE
1 x B 20
1 x B 16
2 x B 16
7
19.5
6.0
400
230
400
3/N/PE
1/N/PE
3/N/PE
3 x B 16
1 x B 16
3 x B 16
4
8.3
6.0
400
230
400
3/N/PE
1/N/PE
3/N/PE
3 x B 16
1 x B 16
3 x B 16
4
8.3
8.9
400
230
400
3/N/PE
1/N/PE
3/N/PE
3 x B 16
1 x B 16
3 x B 16
4
12.1
8.9
400
230
400
3/N/PE
1/N/PE
3/N/PE
3 x B 16
1 x B 16
3 x B 16
4
12.1
R410 A
4.2
8.77
2088
IP14B
1.4401/Cu
R410 A
4.2
8.77
2088
IP14B
1.4401/Cu
R410 A
4.7
9.81
2088
IP14B
1.4401/Cu
R410 A
5.5
11.48
2088
IP14B
1.4401/Cu
R410 A
4.7
9.81
2088
IP14B
1.4401/Cu
R410 A
5.5
11.48
2088
IP14B
1.4401/Cu
mm
mm
mm
900
1270
593
900
1270
593
1045
1490
593
1045
1490
593
1045
1490
593
1045
1490
593
kg
160
160
175
175
175
175
28 mm
28 mm
28 mm
28 mm
28 mm
28 mm
μS/cm
μS/cm
mg/l
mg/l
mg/l
≤3
8.0-8.5
8.0-10.0
<1000
20-100
<30
<0.02
<0.1
≤3
8.0-8.5
8.0-10.0
<1000
20-100
<30
<0.02
<0.1
≤3
8.0-8.5
8.0-10.0
<1000
20-100
<30
<0.02
<0.1
≤3
8.0-8.5
8.0-10.0
<1000
20-100
<30
<0.02
<0.1
≤3
8.0-8.5
8.0-10.0
<1000
20-100
<30
<0.02
<0.1
≤3
8.0-8.5
8.0-10.0
<1000
20-100
<30
<0.02
<0.1
MPa
m³/h
m³/h
m³/h
hPa
m³/h
0.3
2300
0.73
0.52
45
0.7
0.3
2300
0.73
0.52
45
0.7
0.3
4000
1.06
0.76
100
1.0
0.3
4000
1.06
0.76
100
1.0
0.3
4000
1.4
1.00
100
1.0
0.3
4000
1.4
1.00
100
1.0
A
A
A
A
A
kg
t
°dH
Technical guide | 7
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
Output data
WPL 15
10
1
2
3
5
4
5
0
X
Y
1
2
3
-20
-15
-10
-5
0
5
4
5
6
Outside temperature [°C]
Heating output [kW]
max. W55
max. W45
max. W35
10
15
D000003790
6
20
min. W55
min. W45
min. W35
WPL 20
20
15
1
2
10
3
4
5
0
-20
X
Y
1
2
3
-15
Outside temperature [°C]
Heating output [kW]
max. W55
max. W45
max. W35
-10
-5
0
5
4
5
6
10
15
20
D0000060733
6
5
min. W55
min. W45
min. W35
8 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
WPL 25
20
15
1
2
10
3
4
5
0
-20
X
Y
1
2
3
-15
Outside temperature [°C]
Heating output [kW]
max. W55
max. W45
max. W35
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-10
-5
0
5
4
5
6
10
15
20
D0000038667
6
5
min. W55
min. W45
min. W35
Technical guide | 9
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
WPL 20, WPL 25
Installation location requirements
»» Never install the appliance inside a shaft.
1
»» The heat pump module must be level (horizontal).
3
1500
140
»» When selecting the installation site, remember that the appliance generates noise during operation.
200
75
»» The main wind direction must not be towards the fan.
4
750
100
»» Maintain as small a clearance as possible between the heat
pump module and the hydraulic module in order to keep line
losses to a minimum.
5
410
»» The appliance must be firmly attached to the mounting rail,
which in turn must be secured to the foundation/kerbstones.
WPL 15
3
200
75
1300
140
2
1
2
3
4
5
1
D0000028298
»» In winter, the heat pump module must not be covered with
snow or be submerged if there is heavy rainfall.
Air intake
Air discharge
Main wind direction
Supply line recess
Condensate drain recess
Example: Laying pipes above ground
5
410
1
Air intake
Air discharge
Main wind direction
Supply line recess
Condensate drain recess
C
1
2
3
4
5
2
B A
2
D0000034133
4
3
5
A
B
C
1
2
3
4
5
6
D0000028297
750
100
4
100
300
Depth of frost line
Heating flow
Heating return
Condensate drain
Condensate drain conduit
Foundation
Gravel bed
10 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
MK 1 mounting bracket
T-support SK 1
WPL 15
5
1
2
B
4
9
8
5
1
A
8
3
6
A
1
2
3
4
5
6
7
8
Depth of frost line
Heating flow
Heating return
Conduit for supply lines
Foundation
Mounting bracket
Gravel bed
Condensate drain conduit
Condensate drain
4
7
D0000060818
3
A
B
1
2
3
4
5
6
7
8
9
7
6
D0000050006
2
A
1
Depth of frost line
300
Heating flow
Heating return
Conduit for supply lines
Foundation
T-support
Gravel bed
Condensate drain conduit
Condensate drain
Cover
f Observe the structural limits of the T-support used.
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Technical guide | 11
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
WK 2 wall mounting bracket
Note
To prevent disturbance due to structure-borne noise
transmission, never install the wall mounting bracket on
the external walls of living areas or bedrooms.
f Install the wall mounting bracket on a garage wall,
for example.
≥300
3
5
2
1
2
3
4
5
4
D0000058719
1
Heating flow
Heating return
Condensate drain
Condensate drain conduit
Wall mounting bracket
f Observe the structural limits of the wall mounting bracket used.
12 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
Siting
WPL 15
d45
70
100
490
410
1160
900
1270
593
g02
82
157
g01
d47
100
e02 e01
e01
Heating flow
e02
Heating return
d45
d47
g01
g02
Condensate drain
Drain
Air intake
Air discharge
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Type of connection
Diameter
Type of connection
Diameter
Diameter
mm
mm
mm
D0000034131
176
WPL 15 ACS
WPL 15 AS
Push-fit connection
28
Push-fit connection
28
25
Push-fit connection
28
Push-fit connection
28
25
Technical guide | 13
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
Siting
WPL 20, WPL 25
d45
100
490
410
1380
1490
593
g02
82
157
1045
g01
d47
100
e02 e01
e01
Heating flow
e02
Heating return
d45
d47
g01
g02
Condensate drain
Drain
Air intake
Air discharge
Type of connection
Diameter
Type of connection
Diameter
Diameter
mm
mm
mm
D0000028296
176
WPL 20 A
WPL 20 AC
WPL 25 A
WPL 25 AC
Push-fit connection
28
Push-fit connection
28
25
Push-fit connection
28
Push-fit connection
28
25
Push-fit connection
28
Push-fit connection
28
25
Push-fit connection
28
Push-fit connection
28
25
14 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
≥800
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
D0000078119
≥300
≥300
≥300
≥500
≥1000
≥250
D0000028299
≥2000
≥250
2
1
≥300
91_00_00_0036
≥300
f Maintain the minimum clearances to ensure trouble-free operation of the appliance and facilitate maintenance work.
!
Material losses
Please note that both the flow of outdoor air into the appliance, and the flow of exhaust air from the appliance
must be unimpeded.
If the air intake and discharge of the appliance are obstructed by surrounding objects, this may cause a thermal short circuit.
≥1000
1 Main wind direction
2 Air discharge
3 Wall
≥500
D0000078118
≥1000
2
D0000078120
f Never install the appliance in a recess. Two sides of the appliance must remain exposed.
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Technical guide | 15
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
Heating connection
Heat pump circulation pump
Connect the heat pump into the water side of heating systems in
accordance with the standard circuit diagram.
Prior to connecting the heat pump, thoroughly flush the heating
system, check for tightness and carefully vent it.
Observe the correct connection of heating flow and return as well
as the correct pipework cross-section.
Anti-vibration mounts are built into the appliance to reduce the
transmission of structure-borne noise on the water side.
Fit thermal insulation in accordance with the Energy Saving Ordinance [Germany].
Heat pump with buffer cylinder and DHW heating
40
50 60 7080
40
WPL 15
Flow rate
Pressure differential
Circulation pump
Cu pipe
Wall thickness
m3/h
hPa
Type
Ø
mm
0.7
195
28
1.0
WPL 20
WPL 25
1.0
1.0
195
195
UP 25/7.5 PVC
28
28
1.0
1.0
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
90
30
90
20
100
20
100
D0000070531
30
16 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
Electrical connection
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.
The connection must comply with the electrical connection diagram. For this, also observe the installation instructions for the
heat pump manager and any further accessories used.
Note
Observe the standards and regulations applicable in your
country.
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Technical guide | 17
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
AB1-00-00-00-11-11-10-E1
AB1-00-00-00-11-11-10-H1
WPL 15
18 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
AB1-00-00-00-31-31-10-E1
AB1-00-00-00-31-31-10-H1
WPL 15
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Technical guide | 19
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
AB1-00-00-02-21-21-10-E1
AB1-00-00-02-21-21-10-H1
WPL 15
20 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
AA1-00-00-00-11-11-10-E1
AA1-00-00-00-11-11-10-H1
WPL 20, WPL 25
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Technical guide | 21
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
AA1-00-00-00-31-31-10-E1
AA1-00-00-00-31-31-10-H1
WPL 20, WPL 25
22 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Air | water heat pumps
WPL 15/20/25 AS/AC/ACS
AA1-00-00-02-21-21-10-E1
AA1-00-00-02-21-21-10-H1
WPL 20, WPL 25
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Technical guide | 23
Appendix
Key
Pos.
X1.1
X1.2
X1.3
X1.4
X1.5
X1.6
X1.7
X1.8
X1.9
X1.10
X1.11
X1.12
X1.13
X1.14
X1.15
X1.16
X1.17
X1.18
X1.19
X2.1
X2.2
X2.3
X2.4
X2.5
X2.6
X2.7
X2.8
X2.9
X2.10
X2.11
X2.12
X2.13
X2.14
X2.15
WPMsystem
CAN A
CAN B
Outside temperature sensor
Buffer or heating circuit sensor 1
Flow sensor
Heating circuit sensor 2
Heating circuit sensor 3
DHW cylinder sensor
Source sensor
Heat generator 2 sensor
Sensor, cooling
DHW circulation sensor
FE7 remote control
Telephone remote switch
Heating curve optimisation
SG-Ready
Analogue input 1, 0-10 V
Analogue input 2, 0-10 V
PWM output 1
PWM output 2
CAN B
CAN A
X3.1
X3.2
X3.3
X3.4
X3.5
X3.6
X3.7
X3.8
X3.9
X3.10
X3.11
X3.12
X3.13
X3.14
X3.15
X3.16
X3.17
X3.18
X3.19
CAN A
CAN B
Not assigned
Swimming pool sensor, primary
Swimming pool sensor, secondary
Heating circuit sensor 4
Heating circuit sensor 5
DHW cylinder 2 sensor
Differential sensor 1.1 / thermostat sensor 1
Differential sensor 1.2
Differential sensor 2.1 / thermostat sensor 2
Differential sensor 2.2
Not assigned
Analogue input 3, 0-10 V
Analogue input 4, 0-10 V
PWM output 3
PWM output 4
CAN B
CAN A
X4.1
X4.2
Power supply
Power supply utility, enable contact (country
specific)
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
Heat generator 2 DHW
Heat generator 2 heating
Cooling
Heating circuit mixer 2
Heating circuit mixer 3
X4.3
X4.4
Power supply
Swimming pool input
Pumps L
Heating circuit pump 4
Heating circuit pump 5
X4.5
X4.6
X4.7
X4.8
X4.9
X4.10
X4.11
X4.12
X4.13
X4.14
X4.15
I
II
III
IV
V
VI
VII
VIII
IX
X
Source
Heating circuit without mixer
Heating circuit with mixer
Cold water connection
DHW connection
DHW circulation connection
Swimming pool
Solar collector
Differential control
DHW circulation / pasteurisation pump
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
Pool pump, primary
Pool pump, secondary
Heating circuit mixer 4
Heating circuit mixer 5
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
24 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Support brackets for outdoor installation
Support bracket
WK 2
Corrosion-protected wall mounting bracket made from zinc-plated steel for on-site installation. Height adjustments can be made
on the wall rail, while the appliance rail provides the possibility
to align the appliance. Standard delivery includes: 2 pce incl. anti-vibration mounts and 2 m self-limiting ribbon heater.
WK 2
Support length
Weight
mm
kg
234722
800
175
Accessory for
236639 WPL 15 ACS
236641 WPL 20 AC
236645 WPL 25 AC
SK 1
Stainless steel, T-shaped support for floorstanding, concrete-embedded installation. Standard delivery includes: 2 pce incl. installation aid for a defined clearance dimension, anti-vibration
mounts, plus 1 m self-limiting ribbon heater.
SK 1
232964
Height
Depth
Weight
mm
mm
kg
950
570
175
Accessory for
230236 WPL 10 AC
236639 WPL 15 ACS
236638 WPL 15 AS
236640 WPL 20 A
236641 WPL 20 AC
236644 WPL 25 A
236645 WPL 25 AC
MK 1
Corrosion-protected support for floor mounting in matching design, including anti-vibration mounts. For weather-protected
connection of the heat pump.
MK 1
Height
Width
Depth
mm
mm
mm
233047
254
1260
575
Accessory for
230236 WPL 10 AC
236638 WPL 15 AS
236639 WPL 15 ACS
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Technical guide | 25
Connection set for WPL 15/20/25 AC(S)
AS-WP 1
AS-WP 1
AS-WP 2
The connection set is suitable for connecting 32 x 2.9 supply lines coming from the ground. In addition to the connection pieces, the standard delivery includes a white
painted cover hood to protect against the elements.
The connection set is suitable for connecting supply lines coming from the ground with the option of G 1 1/4 A connection. In
addition to the connection pieces, the standard delivery includes
a white painted cover hood to protect against the elements.
AS-WP 1
AS-WP 2
Connection
233622
32 x 2.9 mm
Connection
233623
G 1 1/4
26 | Technical guide WPL 15/20/25 AS/AC/ACSwww.stiebel-eltron.com
Ribbon heater for condensate connection
HZB
HZB
Self-limiting flexible ribbon heater to keep the condensate connection for air | water heat pumps free of ice. Both versions have
a 2 m connecting cable. Heated length: HZB-1: 1 m; HZB-2: 2 m.
HZB-1 HZB-2
Rated output per metre at 10 °C outdoor air temperature
Max. ambient temperature
Min. handling/installation temperature
Min. bending radius
Outer sheath material
Width
Height
Weight
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232978 232979
10
10
65
65
-45
-45
2.5
2.5
TPE-O TPE-O
mm
5.5
5.5
mm
8.0
8.0
kg 0.200 0.240
W
°C
°C
cm
Technical guide | 27
STIEBEL ELTRON GmbH & Co. KG | Dr.-Stiebel-Strasse 33
37603 Holzminden | www.stiebel-eltron.de
2018
D0000080638-a
www.stiebel-eltron.com
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