Baxi Barcelona Installation And Servicing Instructions page 31

13.0 Changing Components – page 31
The fan and venturi, gas valve, injector pipe, condensate
trap, fan protection sensor, spark and sensing
electrodes can be accessed and changed on the
removal of the airbox door panel.
1. Remove the airbox door panel by loosening the four ¼.
turn screws (Fig. 55).
13.8 Spark and Sensing Electrodes (Fig. 56)
1. Disconnect the leads from the centre and right hand
terminals (earth and flame sensing probe). The spark
electrode lead is permanently fixed to the electrode.
Undo the re-usable cable tie and pull down the sleeving
to expose the joint in the electrode lead. Disconnect the
lead.
Spark - Opaque cable
Earth - Black cable
Sensing - White cable
2. Remove the two screws securing each of the
electrodes to the combustion box door and remove the
electrodes.
3. Fit the new electrodes and reassemble in reverse
order.
NOTE: The spark electrode sleeve should always cover
the joint in the electrode lead to prevent tracking.
13.9 Fan (Fig. 57)
1. Loosen the screw holding the injector pipe into the
venturi.
2. Remove the electrical connections to the fan protection
sensor on the fan.
3. Remove the wing nuts securing the fan to the base of
the combustion box.
4. Lower the fan and remove.
5. Disconnect the electrical supply from the right hand
rear of the fan.
6. If changing the fan remove the screws securing the
venturi and fan protection sensor bracket, noting the
positions of the injector opening and sensor bracket, fix
them to the new fan.
7. Fit the new fan and reassemble in reverse order.
The injector pipe, condensate trap and gas valve can be
changed after the removal of the fan.