INSTALLATION
Power supply
16 | WPL 10 AC | WPL 10 ACS www.stiebel-eltron.com
11.3 Power supply WPL 10 ACS (single phase)
Connect cables according to the following diagram.
Connect the electric emergency/booster heater if you want to
utilise the following appliance functions:
Appliance func-
tion
Effect of the electric emergency/booster
heater
Mono energetic op-
eration
If the heat pump undershoots the dual mode point, the
electric emergency/booster heater safeguards both the
heating operation and the delivery of high DHW temper-
atures.
Emergency mode
Should the heat pump suffer a fault that prevents its
continued operation, the heating output will be covered
by the electric emergency/booster heater.
Heat-up program
(only for underfloor
heating systems)
Where return temperatures are <25°C, the electric
emergency/booster heater must provide the necessary
heat for screed drying.
With these low system temperatures, the drying heat
must not be provided by the heat pump, otherwise the
frost protection of the appliance can no longer be guar-
anteed during the defrost cycle.
When the heat-up program has ended, you can discon-
nect the electric emergency/booster heater if it is not
required for the appliance operation.
Please note that during the heat-up program, the emer-
gency operation cannot be selected.
Pasteurisation
control
The electric emergency/booster heater starts automati-
cally when the pasteurisation control is active in order to
regularly heat the DHW to 60 °C to protect it against the
growth of legionella bacteria.
1
2
3
4
5
26�03�01�1529
D0000035392
6
1 X5 Electric emergency/booster heater (DHC)
L, L, N, PE
Connected load Terminal assignment
3.0 kW L N PE
3.2 kW L N PE
6.2 kW L L N PE
2 X3 Power supply (heat pump, compressor)
L, N, PE
3 X4 Control voltage
Power supply: L, N, PE
4 X2 Low voltage (BUS cable)
BUS High H
BUS Low L
BUS earth
BUS "+" (is not connected)
5 Earth terminal for screening the LV lead
6 Ribbon heater
Power supply: L, N, PE
Earth the LV lead by inverting the screen over the external
sheath and clamping it under the earth terminal.
Then check the function of the strain relief fittings.
!
Material losses
When making the L and N connections of the compressor
and the L and N connections of the control unit in single
phase appliances, ensure that the same phase is used.
Protect the circuit with an RCD.
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