B Wiring Diagram - Vaillant VWZ MEH 97/6 Operating Instructions Manual

B Wiring diagram
1
11
10
9
8
1 Power supply PCB
2 For single power supply: 230 V bridge between
X311 and X310; for dual power supply: Replace
the bridge at X311 with the 230 V connection
3 Earthing
4 [X300] Power supply connection
5 Earth wire to X1 on the control PCB
6 [X302] Safety cut-out
7 [X301] Back-up heater
42
3
2
X311 X310
X312
X302
X314
X313
12
10
11
12
7
4
X300
L3
6
L2
5
L1
4
L1S
3
L2S
2
L3S
1
7 1
8 2
9 3
X328
4
5
6
X301
8 [X328] Data connection to the control PCB
9 [X313] Power supply for the control PCB or the op-
tional VR 70/VR 71 or the optional external current
anode
10 [X314] Power supply for the control PCB or the op-
tional VR 70/VR 71 or the optional external current
anode
11 [X312] Power supply for the control PCB or the op-
tional VR 70/VR 71 or the optional external current
anode
Installation and maintenance instructions 0020291544_03
5
L3
L2
L1
6
L1S
L2S
L3S