INSTaLLaTION
Power supply
34
| WPL 15 IKS | WPL 25 IK
www.stiebel-eltron.com
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Tighten the screw cap by hand against main body as far as it
will go. This locks the push-fit connection.
Undoing the push-fit connection
If the push-fit connectors later need to be undone, proceed as
follows:
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Turn the screw cap anti-clockwise until there is a narrow gap
of approx. 2 mm. Press the retainer back with your fingers
and hold on to it.
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Pull out the inserted pipe.
26
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3�
01
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69
3
11. Power supply
11.1 General
WARNING Electrocution
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Before any work, isolate the appliance from the
power supply at the control panel.
Only qualified electricians must carry out the connection in accor-
dance with these instructions.
Permission to connect the appliance may need to be obtained from
your local power supply utility.
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Observe chapter „Preparations / Electrical installation“.
11.2 Electrical connection of internal unit
Note
Before making the electrical connections you need to fill
the heating system (see chapter "Heating water connec-
tion").
The terminals are inside the control panel of the appliance behind
the lower door.
26
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3�
01
�1
75
4
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Open the upper door.
26
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3�
01
�1
753
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Remove the lower door.
1
26
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3�
01
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76
5
1 Entry electrical cables
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Route all connecting cables and sensor leads through the
entry provided in the back panel.
11.2.1 Electric emergency/booster heater, compressor and fan
!
Material damage
In order to ensure reliable operation of the appliance, you
must connect the electric emergency/booster heater for
operation without a buffer cylinder.
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If you have installed a buffer cylinder, connect the electric
emergency/booster heater if you want to utilise the following
appliance functions:
appliance
function
Effect of the electric emergency/booster heater
Mono ener-
getic operation
If the heat pump cannot reach the dual mode point, the elec-
tric emergency/booster heater ensures both the heating ope-
ration and the provision of high DHW temperatures.
Emergency
mode
Should the heat pump suffer a fault that prevents its continu-
ed operation, the heating output will be covered by the elec-
tric emergency/booster heater.
