Electric Connection
18
Heating Unit must be used with
two residual current devices - 30 mA !
Mod. 31
1
0
1
W
L3
4
1
2
L1
U
L2
V
2
4
6
1
3
5
8
K1
PE
PE
bl
sw
Main Switch
N-busar
PE
N
L2
L1
L3
PE-busar
PE
N
L2
L1
L3
PE
PE
PE
bl
sw
PE
bl
sw
PE
bl
sw
K1
A1
A2
Boil protection thermostat
Input
Heating element 3x400V/N/PE over 4-pole FI 30mA
Pump 230V/N/PE
Socket for heating element 1 400V/3kW
Input Controller-Pump 230V/N/PE over 2-pole FI 30mA
Return water flow thermostat
Before opening
switch off main
current.
