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5Installation Instructions VRC430 0020042468_02
4 Assembly
The VRC 430 can either be integrated in the heating
unit or mounted separately in the living area on a wall.
When mounting on the wall, the connection to the heat-
ing unit is via a twin-core eBUS line.
The VRC 430 is supplied with one of the following exter-
nal sensors:
– VRC 693
connection is via a twin core cable to the heating unit
– VRC 9535 (DCF)
connection is via a 3-core cable to the heating unit
4.1 Scope of delivery
Using Table 4.1, check the scope of delivery
Pos. Number Component
1 1 Controller VRC 430
21
External sensor VRC 693 or
External sensor VRC 9535 (DCF)
3 1 Fixing material
4 1 6-pole edge connector
51
Operating and
Installation Manual
Table 4.1 Scope of supply VRC 430
4.2 Accessories
The following accessories can be used to extend con-
troller functionalities:
2 of 7 multi-functional modules
The multi-function module VR 2 of 7 can be used by the
VRC 430 to control a circulation pump.
VR 61 mixer module
The mixer-module VR 61 extends the VRC 430 function-
ality to include a twin-circuit controller.
Solar module VR 68
The solar module VR 68 can be used by the VRC 430 to
control a solar installation.
VR 81 remote control unit
The remote control VR 81 is recommended if the
VRC 430 is fitted in the heating unit, or if the second
heating circuit is to be controlled decentrally.
The remote control VR 81 can be used to set the follow-
ing parameters:
– Operating mode
– Target room temperature
Symbols are displayed indicating maintenance and error
messages.
Data interchange is via eBus line.
h
Note!
If accessory components are connected to the
VRC 430, the instructions for these compo-
nents must also be observed.
4.3 Location
The controller should only be installed in dry rooms.
If the controller is mounted on the wall, it should be fit-
ted in such a way that the room temperature is meas-
ured properly; e.g. on an internal wall of the main living
room, at a height of approx. 1.5 m
If the thermostat function is activated, advise the opera-
tor that all the radiator valves must be fully open in the
room where the controller is mounted.
See Chapter 4.6 for information on locating the outdoor
sensor.
4.4 Fitting the controller in the heating unit
e
Danger!
Live connections!
There is a danger to life from electrocution
when working on the electronics box of the boil-
er.
Switch off the power supply to the electronics
box of the heating unit and secure against re-
connection before carrying out any work.
Only open the electronics box if the heating
unit is disconnected from the power source.
Proceed as follows:
Switch the boiler off.
Turn off the power supply to the heating unit and
secure the power supply against re-connection.
Remove the front screen from the heating unit.
Carefully press the controller (without wall plinth,
see Fig. 4.1) with the pin rail into the plug connector
on the heating unit.
Now fit the external sensor (see Chapter 4.6), if not
already done.
Carry out the electrical installation of the external
sensor as described in Chapter 5.2 or 5.3.
Re-connect the power supply to the heating unit.
Switch the heating unit on again.
Assembly 4
25


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