INsTALLATIoN
WPL 13 E | WPL 18 E | WPL 23 E | WPL 13 cool | WPL 18 cool | WPL 23 cool
40
| WPIC
www.stiebel-eltron.com
26
�0
3�
01
�0
94
9�
X4
X2
X4 Control unit ("steuerung")
Power supply: L, N, PE
Control inputs:
2nd heat generator (HG2)
External control, e.g. standalone operation (Ext.con)
X2 safety extra low voltage (eLV)
BUS High H
Bus low L
Bus earth
Bus " + " (not required)
10.6.2 Function module connection
Note
The function module terminals are located in the terminal
area.
The control cable and bus cable connect the function module to
the heat pump standard appliance.
D
00000
51
19
0
2
1
1 Connecting cables (bus, control voltage)
2 Terminal area
f
f
For all connections, use appropriate cables in accordance
with local regulations.
f
f
Check that the strain relief fittings are working as intended.
Connections X4, X2: Control unit and extra low voltage
D
00000
90
33
9
f
f
Route the control cable from the function module into the
heat pump standard appliance.
f
f
Connect the control cable to connections L, N and PE.
f
f
Route the bus cable from the function module into the heat
pump standard appliance.
f
f
Connect the bus cable to the bus terminal.
