www.stiebel-eltron.com WPL basic | WPL S basic | 15
INSTALLATION
Electrical connection
PE
1
2
26�03�01�1640�
1 Power supply (heat pump, compressor)
L1, L2, L3, N, PE
2 Elect. booster heater (DHC)
L1, L2, L3, N, PE
Connected
load
Terminal assignment
2.6 kW L1 N PE
3.0 kW L2 N PE
3.2 kW L3 N PE
5.6 kW L1 L2 N PE
5.8 kW L1 L3 N PE
6.2 kW L2 L3 N PE
8.8 kW L1 L2 L3 N PE
!
Damage to the appliance and environment
The compressor in the appliance can only turn in one
direction. If the appliance is not connected correctly, the
compressor remains in operation for 30 seconds then
switches off.
On the heat pump manager display, the fault message NO OUTPUT
appears.
To change the direction of the rotating field, when the power
is disconnected, swap over two phases.
Cover and seal the mains terminal (X3) when all electric ca-
bles have been connected.
Terminals X4, X2, control and LV
X2
X4
1
2
26�03�01�1641�
1 Control terminals
Power supply: L, N, PE
Control inputs:
2. Heat source
Ext. ST Stand alone operation
2 LV terminal
BUS high H
BUS low L
BUS ground “+” (not connected)
11.8.2 Electrical connection of the WPL S basic (single phase)
Connection X3: Appliance and electric emergency/booster
heater (DHC)
Connect the appliance to terminal X3.
Connect the electric emergency/booster heater to terminal X3
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 cannot reach the dual mode point,
the electric emergency/booster heater ensures both
the heating operation and the provision of high DHW
temperatures.
Emergency mode
Should the heat pump suffer a fault that prevents its
continued operation, the heating output will be cov-
ered by the electric emergency/booster heater.
Heat-up program
(only for underfloor
heating systems)
The electric emergency/booster heater must provide
the drying heat in case of return temperatures <25°C.
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
guaranteed during the defrost cycle.
After expiry of the heat-up program, 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
emergency mode cannot be selected.
Pasteurisation control
The electric emergency/booster heater starts automat-
ically 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.
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