Appendix
0020258610_00 ecoVIT exclusiv Installation and maintenance instructions
35
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 k
Ω
characteristic,
screw-in version
13
Return temperature sensor, 10 k
Ω
characteristic,
optional
14
Flue gas safety cut-out (CH (series) and AT (ac-
cessories) only, bridged in all other countries)
15
Flue gas pressure switch
16
Safety cut-out
17
Cylinder contact "C1/C2"
18
Cylinder temperature sensor, 2.7 k
Ω
characteristic
19
Water pressure sensor
20
actoSTOR
sensor, 2.7 k
Ω
characteristic
21
Coding resistor power (5110
Ω
)
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
G.2
Wiring diagram for the VRC 450, VRC 470 or VRC 700 control
X22
2
4
X12
T4
X11
X13
X18
X6
X14
B. OFF
Bus
7 8 9
RT
L N
3 4 5
RT
X32
X41
X90
X40
X22
X20
X2
X31
X30
X43
X50
24V
230V~
13
1
9
6
X2
19
20
21
17
18
8
5
22
X1
X1
24V
230V~
X13
L
N
Burner Of
f
B
US
-
+
7
8
9
X41
6
5
4
3
2
1
2
1 Masse
Masse
3 DCF
4 RF
5 AF
6 FB
X18
L
N
L
N
3
2
1
2
1
4
3
6
5
1
Main PCB
2
eBUS control
3
Outdoor temperature sensor, flow temperature
sensor (optional, external), DCF receiver (for
VRC 430)
4
Cylinder temperature sensor, 2.7 k
Ω
characteristic
5
Cylinder charging pump
6
Heating pump
