CHANGING COMPONENTS - Page 29
To change any components on the back boiler it is
necessary to remove the fire front.
After changing any components carry out gas
soundness checks.
Removal of Firefront
Isolate the electrical supply to the appliance and ensure the
permanent live (when fitted) has also been isolated.
Turn the gas service tap to the OFF position.
Refer to the separate firefront instructions for the removal of
the firefront.
Remove the controls assembly from the boiler as described
under “Annual Servicing’.
Flame Sensing Lead
ELECTRONIC CONTROL MODELS
Remove the three screws holding the controls box cover on
and remove the electrode lead from its terminal on the PCB
and the sensing probe. The lead has a white sleeve at the
probe end.
Reassemble in reverse order.
Ignition Lead
ELECTRONIC CONTROL MODELS
Remove the three screws holding the controls box cover on
and remove the electrode lead from its terminal on the PCB
and the electrode. The lead has a black sleeve at the
electrode end.
Reassemble in reverse order.
MANUAL CONTROL MODELS
Remove the controls heat shield from its clips if not already
done so.
Pull the lead off the spade terminals on the piezo unit
and the ASD electrode.
Reassemble in reverse order.
