Baxi Combi Instant 80e Installation & Servicing Instructions Manual page 30

Baffle
Tab
11.0 Servicing the Boiler
Spring Clip
11.1 Annual Servicing (Cont)
10. Remove the spring clips retaining the air box side
baffle plates. Disengage the tabs on the baffles from the
slots in the fan hood (Fig. 42).
11. Undo the screws securing the fan and hood to the
appliance back panel. Draw the assembly forwards
Fig. 42
(Fig. 42a).
Fan and Hood
Assembly
12. Undo the screws securing the burner to the injector
manifold (Instant 105e model only). Draw the burner
Fig. 42a
out of the combustion box, pulling the electrode
grommets from the slots in the combustion box lower
panel (Fig. 43).
13. Disconnect the electrode leads and grommets from
the electrodes. Completely remove the burner (Fig. 43).
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.
DHW Filters (Fig. 44)
Electrode
17. If the flow of domestic hot water is diminished, it
Grommets
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
the threaded bush (Fig. 43a).
20. Extract the filter and rinse thoroughly in clean water.
Reassemble and check the flow. If required clean the
manifold filter as described below.
Fig. 43
Fig. 43a
Threaded
Burner
Bush
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
clean water and reassemble in reverse order.
23. Check that the pressure vessel charge is 0.5bar and
reassemble in reverse order of dismantling.
24. Turn the selector switch fully anticlockwise against
the spring pressure to position R and hold for 2 seconds
Blanking Cold Water
Inlet Tap to reset the boiler before recommissioning.
Cap
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
Cartridge
user.
Body
Filter Gauze
Flow
Regulator
Venturi
Fig. 44
Inlet/Return Manifold
30