Baxi 50 HE Plus Installation & Servicing Instructions Manual page 38

Air Box Door Panel
Sensing
Earth
Spark
Fig. 51
Injector Pipe
Screw
Protection
Sensor
Electrical Connections
Fig. 52
38
© Baxi Heating UK Ltd 2006
Combustion
Box Door
Injector
Opening
Gasket
Venturi
Electrical Connection
Wing Nuts
13.0
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
1 / turn screws (Fig. 50).
4
13.5
1. Disconnect all three leads from tabs.
2. Remove the two screws securing each of the
electrodes to the combustion box door and remove the
electrodes.
Fig. 50
3. Fit the new electrodes (and new gasket, as required)
and reassemble in reverse order.
13.6
WARNING: The PCB Control and Fan
Assembly are 325 Vdc. Isolate at supply
before access.
1. Loosen the screw holding the injector pipe into the
venturi.
2. Remove the electrical connections to the fan and
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. 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.
Fan
6. 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.
Changing Components
Spark and Sensing Electrodes
(Fig. 51)
Spark - Opaque cable
Earth - Green/Yellow cable
Sensing - White cable
Fan
(Fig. 52)