Vaillant VWL 127/5 IS User Manual

Appendix
0020257319_02 Hydraulic station Installation and maintenance instructions 43
Appendix
A Wiring diagram
1 2 3 4 5
6
L1 L1
L2 L3
N
3 2 1
L N
3 2 1
L N
X302
X300X310X311
X312
X314
X313
3 2 1
L N
3
2 1
L1
N
3 4
1 2
N
L
1
2
3
4
5
6
L2
L3
L1
L1S
L2S
L3S
L2
L3
L1
L1S
L2S
L3S
8 7 6 5 4 3 2 1
L3_6 L3_5 L2_4 L2_3 L1_2 L1_1 N
X301
X328
12
11
6
5
4
2
3
1
10
9
8
7
12
6
4
9
1
8
2
3
7
10
11
5
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
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

Vaillant VWL 127/5 IS Specifications

General

Brand	Vaillant
Model	VWL 127/5 IS
Category	Heat Pump
Language	English