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13.0 Servicing the Boiler
36
© Baxi Heating UK Ltd 2007
13.1 Annual Servicing (Cont)
11. 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).
12. Undo the screws securing the fan and hood to the
appliance back panel. Draw the assembly forwards
(Fig. 57).
13. 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).
14. Disconnect the electrode leads and grommets from
the electrodes. Completely remove the burner (Fig. 58).
15. Brush any deposits from the injectors. Do not use a
pin or wire to clean them.
16. Brush the burner blades and venturis and clean the
combustion box.
17. 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)
18. If the flow of domestic hot water is diminished, it
may be necessary to clean the filters.
19. Initially check the cold water inlet tap filter.
20. Turn the tap off. Undo the blanking cap and remove
the thread bush (Fig. 59).
21. Extract the filter and rinse thoroughly in clean water.
Reassemble and check the flow. If required clean the
manifold filter as described below.
22. Undo the filter cartridge from the inlet/return
manifold.
23. Dismantle the cartridge and carefully remove the
flow regulator and filter gauze. Rinse them thoroughly in
clean water and reassemble in reverse order.
24. Check that the pressure vessel charge is 0.5bar and
reassemble in reverse order of dismantling and
recommission.
25. Turn the selector switch fully anticlockwise against
the spring pressure to the reset position and hold for 2
seconds to reset the boiler.
26. 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.
Spring Clip
Fan and Hood
Assembly
Baffle
Tab
Burner
Electrode
Grommets
Fig. 56
Fig. 58
Fig. 57
Fig. 59
Threaded
Bush
Cold Water
Inlet Tap
Blanking Cap
Cartridge
Body
Filter Gauze
Flow
Regulator
Venturi
Inlet/Return Manifold
Fig. 60