Wiring Diagram For The Vrc 450, Vrc 470 Or Vrc 700 Control - Vaillant ecoVIT exclusiv Installation And Maintenance Instructions Manual

1 Main PCB
2 Control panel PCB
3 VRC 430 eBUS installation
4 Surface-mounted thermostat/burner off
5 eBUS control
6 Room thermostat
7 Circulation pump remote control
8 Outdoor temperature sensor, flow temperature
sensor (optional, external), DCF receiver (for
VRC 430)
9 Signals, VR 40 accessory module; actoSTOR
10 eBUS for VR 33 or VR 34
11 Fan
12 Flow temperature sensor, 10 kΩ characteristic,
screw-in version
13 Return temperature sensor, 10 kΩ characteristic,
optional
14 Flue gas safety cut-out (CH (series) and AT (ac-
cessories) only, bridged in all other countries)
G.2

Wiring diagram for the VRC 450, VRC 470 or VRC 700 control

X50
1
X32
1 Main PCB
2 eBUS control
3 Outdoor temperature sensor, flow temperature
sensor (optional, external), DCF receiver (for
VRC 430)
0020258610_00 ecoVIT exclusiv Installation and maintenance instructions
X1
X41
X43 X31
X20
X22
X40
X30
X90
X2
X41
24V
X14
X6
230V~
X13
X18
X11
X18
X13
T4
X12
15 Flue gas pressure switch
16 Safety cut-out
17 Cylinder contact "C1/C2"
18 Cylinder temperature sensor, 2.7 kΩ characteristic
19 Water pressure sensor
20 actoSTOR sensor, 2.7 kΩ characteristic
Coding resistor power (5110 Ω)
21
22 Gas valve assembly
23 VR 40, 230 V power supply
24 Cylinder charging pump
25 Internal accessory (selected via D.26)
26 Fan, 230 V power supply, VKK 476 and VKK 656
only
27 Heating pump
28 External control/room thermostat (contact on/off)
29 Ignition electrode, ionisation electrode
-
+
7
8
9
6
5
4
3
2
1
4
X22
2
22
5
8
18
17
19
20
X2
21
6
9
1
13
L
N
L
N
L
X1 N
4 Cylinder temperature sensor, 2.7 kΩ characteristic
5 Cylinder charging pump
6 Heating pump
Appendix
2
6 FB
5 AF
4 RF
3 DCF
3
2 Masse
1 Masse
4
230V~
3
2
5
1
6
24V
35