Wiring Diagram - Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

Appendix
E.2

Wiring diagram

Applicability: VUW 346/7-2 (H-GB)
2
1
X40 X51 X32
X90
1 Main PCB
2 Interface PCB
3 Safety thermostat for underfloor heating
4 24 V DC room thermostat
5 Bus connection (digital room thermostat/controller)
6 Outside temperature sensor, wired
7 Temperature sensor in the heating return
8 Temperature sensor in the heating flow
9 Fan
42
X51
X51
X51
X35
–
Burner +
24V=
off
RT BUS
X2
X20
X30
X21
L
N
X12
RT
230Vac
Burner off
RT 24V
X106
eBUS
1
2
3
X41
4
5
6
13
6
5
10
X20
11
4
1 8
15
2 7
3
4 6
16
5 5
1
9
8
17
7
18
14
11
13
X2
3
6
2
20
10
19
14
1
4
X21
3
2
L
X12
N
L
X14
N
RT 230Vac
L
X1
17
N
N
L
L
10 Gas valve
11 Diverter valve
12 Pressure sensor
13 Mass flow-
14 External ignition device
15 Ionisation and ignition electrode
16 Heating pump
17 Main power supply
Installation and maintenance instructions ecoTEC sustain 0020253094_01
3
4
5
6
1
7
2
1
8
2
9
1
M
2
3
4
10
3
1
11
6
M
4
3
1
12
1
4
3
1
13
3
2
3
2
1
15
24V
230V~
16