Baxi Barcelona System Installation And Servicing Instructions page 34

13.0 Changing Components - Page 34
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. 63).
13.16 Spark and Sensing Electrodes (Fig. 64)
1. Disconnect the supply to the electrodes noting their
positions (left to right):
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.
13.17 Fan (Fig. 65)
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.