Baxi Platinum Combi 24 Installation And Service Manual page 34

Burner
Sensing
Electrode
Electrode Position
Electrode
Leads
Fig. 48
Venturi
Gas Inlet Pipe
Fig. 49
Hall Effect
Sensor
Hydraulic Inlet
Assembly
34
© Baxi Heating UK Ltd 2015
Viewing Window
Spark Ignition
Electrode
Fan, Collector and Cover
Assembly
Injector
Threaded
Bush
Blanking
Cap
Restrictor
(not on 40 models)
Fig. 51
Filter
12.0 Servicing
12.2 Annual Servicing - Inspection (Cont)
6. Undo the nut on the gas inlet pipe to the venturi (Fig. 65)
and pull the sensing pipe off the fan.
7. Disconnect the electrode leads, noting their position, and
the fan electrical plugs (Fig. 48).
8. Undo the four nuts retaining the combustion box cover
to the heat exchanger.
9. Carefully draw the fan, collector and cover assembly
forward, being careful to retain the injector in the venturi
(Figs. 48 & 49).
10. Clean any debris from the heat exchanger and check
that the gaps between the tubes are clear.
11. Inspect the burner, electrodes position and insulation,
cleaning or replacing if necessary. Clean any dirt or dust
from the air box.
12. Reassemble in reverse order.
NOTE: The sensing pipe must be reconnected to the
fan, not the venturi.
DHW Filter (Fig. 51)
13. If the flow of domestic hot water is diminished, it may
be necessary to clean the filter.
14. Initially check the cold water inlet tap filter.
15. Turn the tap off and draw off from a hot tap. Undo the
blanking cap and remove the threaded bush (Fig. 50).
16. Extract the filter and rinse thoroughly in clean water.
Reassemble and check the flow. If required clean the
restrictor filter as described below.
Fig. 50
17. Pull off the hall effect sensor. Undo the restrictor from
the inlet/return manifold.
18. Rinse the filter thoroughly in clean water and reassemble
in reverse order.
19. Turn the selector switch fully anticlockwise against the
spring pressure to the reset position and hold for 5 seconds
to reset the boiler.
20. Complete the relevant Service Interval Record section of
Cold Water
the Benchmark Commissioning Checklist at the rear of this
Inlet Tap
publication and then hand it back to the user.