Vaillant VR 81 Supplement Manual page 22

9 Electrical installation
Key
1 Controller VRC 430
2 Remote control unit VR 81
3 Appliance
4 eBUS connection (2-lead)
Carry out the wiring for the connection of the VR 81
remote control unit in accordance with Fig. 9.2.
h Note
The cable for the e-BUS connection is not
included in the scope of delivery.
When connecting the 2-lead eBUS the lines can be
swapped without adversely affecting communication (see
Fig. 9.2). Also observe the manual for the appliance.
18
- BUS + 7 8 9
- + 7 8 9
Fig. 9.2 Electrical connection
Note
h
Free terminals on the appliances must not be
used as support terminals for additional wiring.
To close the casing, place the top edge of the casing
cover in the snap arms (4, Fig. 8.3) fold it down and
press on until it audibly engages with the casing
socket.
Installation instructions VR 81 0020044392_00
VR 81
L N 3 4 5
L N 3 4 5
Boiler