5.6.3 One and two stage heating appliances
VR 31 switching bus couplers must be used if more than
one one-stage or two-stage heating appliance is con-
nected. One bus coupler is required for each of the
appliances to be connected.
Fit the bus coupler to the boiler connecting block.
If this is not possible:
Install a wall mounting box.
The wall mounting box must be provided by the cus-
tomer.
Fit the bus coupler in the wall mounting box.
Up to six
VR 31 modules can be used.
5.7
Completing the electrical installation of the
controller
Pass the cables carrying low voltage
(e.g. sensor lines) behind the wall mount and through
the upper cable aperture (
¬ Fig. 4.3
, (
6
)).
Pass the cables carrying mains voltage (230 V)
through the lower cable duct (
¬ Fig. 4.3
, (
4
)).
Fix all cables with the accompanying cable clamps
(
¬ Fig. 4.3
, (
5
)).
Fit the housing cover (
¬ Fig. 4.2
, (
2
)).
Connect the controller to the power supply.
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44
Installation Instructions VRC 630 0020095108_00
5 Electrical installation
Содержание VRC 630
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