Installation Instructions

Replacing components
Installation instructions VRC 470f 0020124645_00 41
11
11 Replacing components
11.1 Recording radio controller settings
i
When you replace the radio receiver unit and/
or the radio controller, the user settings will
be partially or completely lost.
Before replacing the radio receiver unit and/or the radio
controller, you should make a note of all the settings on
the radio controller.
> Scroll through all display pages on the radio control-
ler and note down all manually configurable parame-
ters (e.g. target room temperature, programmed time
period).
11.2 Replacing the radio receiver unit
e
Danger!
Risk of death from live connections!
When working in the control cabinet of the
boiler there is a risk of death from electric
shock. Continuous voltage is present on the
mains connection terminals, even if the main
switch is turned off!
> Switch the main switch off before working
on the control cabinet of the boiler.
> Disconnect the boiler from the mains
power by disconnecting the mains plug or
by de-energising the boiler via an isolating
device with a contact opening of at least
3mm (e. g. fuses or power switches).
> Secure the power supply against being
switched on again.
> Open the control cabinet only when the
appliance is disconnected from the power
source.
11.2.1 Removing the faulty radio receiver unit
i
Before you start, you should make a note of
all the settings on the radio controller.
For wall-mounting:
2
3
1
Fig.11.1 Removing radio receiver unit
> Insert a screwdriver into the slot (1) on the wall-
mounting base (2).
> Carefully lever the radio receiver unit (3) off the wall-
mounting base (2).
> Dispose of the faulty radio receiver unit correctly.
For installation in the boiler:
> If necessary, open the front cover on the boiler.
> Carefully remove the radio receiver unit from the
boiler switch box.
> If necessary, close the front cover on the boiler.
> Dispose of the faulty radio receiver unit correctly.
11.2.2 Fitting the new radio receiver unit
> Fit the new radio receiver unit to the wall as described
in (¬Section4.3)/ (¬Section4.4).