Electrical installation
Installation instructions VRC 470 0020116690_00
15
5
5.3
Connecting the controller installed in the
living room
b
Caution!
Malfunctions caused by incorrect installa-
tion!
Without a bridge between terminals 3 and 4
on the PCB in the control cabinet, the boiler
cannot work.
>
When connecting the controller, ensure
that the bridge between terminals 3 and 4
is installed.
>
Disconnect the power supply to the boiler.
>
Secure the power supply to the boiler against being
switched on again.
1
2
Fig. 5.3 Connecting the controller
Key
1 VRC
470
2 Boiler terminal strip
i
When connecting the eBUS line, there is no
need pay attention to the polarity. If the two
connections are switched over, communica-
tion is not affected.
Connect the controller to the boiler as follows:
>
Connect the eBUS line to the terminals (
1
) of the pin
header in the wall mounting base of the controller.
>
Connect the eBUS line to the terminal strip of the
boiler (
2
).
