B Wiring Diagram - Vaillant uniTOWER plus Operating Instructions Manual

B Wiring diagram
1
10
9
8
7
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 Permanently installed protective conductor connec-
tion to the housing
4 [X300] Power supply connection
5 [X302] Safety cut-out
6 [X301] Back-up heater
46
3
2
X311
X310
X312
X302
X314
X313
12
10
11
12
6
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
7 [X328] Data connection to the control PCB
8 [X313] Power supply for the control PCB or the op-
tional VR 70/VR 71 or the optional external current
anode
9 [X314] Power supply for the control PCB or the op-
tional VR 70/VR 71 or the optional external current
anode
10 [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 0020291525_04
L3
L2
L1
5
L1S
L2S
L3S