To ensure continued efficient operation of the appliance, it
is recommended that it is checked and serviced as necessary
at regular intervals. The frequency of servicing will depend
upon the particular installation conditions and usage but in
general once a year should be adequate.
It is the law that any service work must be carried out by a
competent person such as British Gas or other CORGI regi-
stered personnel. Before commencing any service opera-
tion, ISOLATE the mains electrical supply, and TURN OFF the
gas supply at the main service cock. Service the appliance by
following the full procedure detailed below.
5.1 MAIN BURNER ASSEMBLY
– Remove the front casing panel by unscrewing the retai-
ning screws and brackets situated above the front panel,
and pulling the panel forwards from the top corners
whilst holding the side panels in place.
–
Remove both casing side panels by unscrewing the three
screws in each situated underneath and above the side
panel, and lift the panels vertically upwards to release
them (fig. 8).
– Release the two spring clips and remove the four fixing
screws securing the sealed chamber front panel then
remove the panel (fig. 19).
– Unscrew the 5 screws securing the combustion chamber
front panel and remove the panel, taking care not to
damage the insulation.
– Unscrew the pilot pipe from the pilot burner and with-
draw. Carefully remove the pilot injector. It may be
necessary to remove the pilot bracket to do this.
– In the “FRIENDLY” model unscrew the thermocouple
and spark electrode connections and remove from pilot
bracket. Unscrew the two screws holding the pilot
bracket and lift clear.
– Unscrew the burner manifold union.
– Remove the burner assembly locking nut.
– Lift the front of the burner to disengage manifold
thread and then lift the burner clear.
– Remove the burner manifold by disconnecting the four
screws (9 fig. 24).
– Inspect and if necessary, clean the injectors.
– Inspect and if necessary, clean the main burner bars.
5.2 PILOT ASSEMBLY
– Inspect the pilot injector; clean if necessary.
– Inspect and clean (if necessary) the pilot burner. Ensure
that it is free from debris.
– Re-assemble the burner assembly in reverse order ensu-
ring that the baffle is correctly re-positioned. Do not
reassemble any other components until the service is
completed.
5.3 FAN ASSEMBLY
– Disconnect the electrical connections to the fan. Note
the position of the earth conductor.
– Pull off the two pressure sensing lines.
–
Remove the four screws securing the fan mounting plate.
– Tilt the fan assembly forwards and remove in a
downwards direction.
– Inspect the fan assembly and clean if necessary.
5.4 HEAT EXCHANGER
– Remove the anti-vibration spring on the top of the col-
lector hood (fig. 20).
– Lift the collector hood assembly, tilt forwards and remo-
ve the hood.
– Inspect the heat exchanger, and clean if necessary.
5.5 RE-ASSEMBLY
– Re-assemble all the components in reverse order and
replace all the gaskets fitted onto the gas line.
Check
15
5 ROUTINE SERVICING INSTRUCTIONS
Fig. 19
Fig. 20
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