Connection Diagram, Product With Heating Mode Only - Vaillant ecoTEC pure VC 146/7-2(E-DE) Installation And Maintenance Instructions Manual

E.2

Connection diagram, product with heating mode only

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
0020258016_01 ecoTEC pure Installation and maintenance instructions
X51
X51
X51
X35
– +
Burner 24V=
off RT BUS
X2
X20
X30
X21
L
N
X12
Burner off
RT 24V
X106
eBUS
1
2
X41 3
4
5
6
13
6
5
10
X20
11
4
15
3
16
1
9
8
17
7
18
14
11
13
X2
3
6
2
20
10
19
14
1
4
X21
3
2
L
X14
N
X1
N
N
L
L 17
10 Gas valve
11 Diverter valve
12 Pressure sensor
13 Plug, cylinder, hot water heat exchanger
14 External ignition device
15 Ionisation and ignition electrode
16 Heating pump
17 Main power supply
Appendix
3
4
5
6
1
7
2
1
8
2
9
1
M
2
4
5
10
3
1
11
6
M
4
3
1
12
1
4
3
1
13
3
2
3
2
1
15
24V
230V~
16
41