Baxi Main Combi 24 HE Installation And Service Instructions Manual page 36

Fan and Hood
Assembly
Fig. 57
Electrode
Grommets
Cartridge
Body
Filter Gauze
Flow
Regulator
Venturi
Fig. 60
36
© Baxi Heating UK Ltd 2011
Spring Clip
Fig. 56
Fig. 58
Threaded
Burner
Blanking Cap
Inlet/Return Manifold
Baffle
Tab
13.1
10. Ease the front edge of the left hand baffle upwards,
disengaging the spring clip. Disengage the tab on the
baffle from the slot in the fan hood (Fig. 56).
11. Undo the screws securing the fan and hood to the
appliance back panel. Draw the assembly forwards
(Fig. 57).
12. Undo the screws securing the burner to the injector
manifold. Draw the burner out of the combustion box,
pulling the electrode grommets from the slots in the
combustion box lower panel (Fig. 58).
13. Disconnect the electrode leads and grommets from
the electrodes. Completely remove the burner (Fig. 58).
14. Brush any deposits from the injectors. Do not use a
pin or wire to clean them.
15. Brush the burner blades and venturis and clean the
combustion box.
16. Ensure that the heat exchanger fins are clear of any
obstruction.
NOTE: If necessary the secondary heat exchanger
may be dismantled - see section 14.24.
DHW Filters (Fig. 60)
17. If the flow of domestic hot water is diminished, it
may be necessary to clean the filters.
18. Initially check the cold water inlet tap filter.
19. Turn the tap off. Undo the blanking cap and remove
Fig. 59
Bush
the thread bush (Fig. 59).
20. Extract the filter and rinse thoroughly in clean water.
Reassemble and check the flow. If required clean the
manifold filter as described below.
21. Undo the filter cartridge from the inlet/return
manifold.
22. Dismantle the cartridge and carefully remove the
flow regulator and filter gauze. Rinse them thoroughly in
Cold Water
clean water and reassemble in reverse order.
Inlet Tap
23. Check that the pressure vessel charge is 0.5bar and
reassemble in reverse order of dismantling and
recommission.
24. Turn the selector switch fully anticlockwise against
the spring pressure to the reset position and hold for 2
seconds to reset the boiler.
25. Complete the relevant Service Interval Record
section of the Benchmark Commissioning Checklist at
the rear of this publication and then hand it back to the
user.
13.0 Servicing the Boiler
Annual Servicing (Cont)