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2000225005B
10 Replacement of Parts
Diagram 10.6
REAR
INSULATION
PANEL
SECURING
NIB
SIDE
INSULATION
BURNER
SUPPORT
BRACKET
NUTS
10.3 Electrode
Remove front panel to gain access, see section 6.8.
Refer to the relevant paragraphs of the servicing section to
remove the burner from combustion chamber.
To remove the electrode, unscrew the retaining bracket, see
diagram 8.12.
Take the electrode out from below and remove the ignition lead.
When removing and replacing the electrode take care not to
damage it.
When refitting, check spark gap, see diagram 8.12.
10.4 Multifunctional Control
Remove front panel to gain access, see section 6.8.
Remove the electrical plug securing screw and disconnect the
plug, see diagram 10.4.
Disconnect the gas cock, on the left hand side.
Support the multifunctional control, remove the four screws (2
long, 2 short) from the flanged connection at the right hand side.
Remove and discard the original “O” ring from the flanged
connection and fit the new “O” ring supplied, into recess, before
fitting the replacement multifunctional control.
After assembly test for gas soundness and purge in accordance
with the current issue of BS6891.
10.5 Solenoid
Remove front panel to gain access, see section 6.8.
Remove the electrical plug from the multifunctional control and
remove the securing screw and then the solenoid assembly,
see diagram 10.4.
10.6 Burner
Refer to the relevant paragraphs of the servicing section to
remove the burner from combustion chamber.
10.7 Injector
Refer to the relevant paragraphs of the servicing section to
remove the burner from combustion chamber.
The injector can then be unscrewed from the manifold.
When replacing use a little jointing compound on the external
thread only, to ensure a gas tight seal.
10.8 Air Pressure Switch
Remove front panel to gain access, see section 6.8.
Refer to the relevant paragraphs of the servicing section to
remove the fan access door.
Remove the air pressure tube and electrical connections from
the switch, release the securing screws and remove the switch,
see diagram 10.5.
When fitting the replacement make sure that the air pressure
tubes are fitted, as shown in diagram 10.5 and the electrical
connections are made as shown in wiring diagram 9.4.
10.9 Fan
Remove front panel to gain access, see section 6.8.
Refer to the relevant paragraphs of the servicing section to
remove the fan access door.
Remove the electrical connections and air pressure tubes from
the fan.
Note: Remove the electrical connections by pulling insulation
boots only.
Undo the screw securing the fan to the flue hood and disengage
fan from flue hood, see diagram 10.5.
When re-assembling, make sure that the air pressure tubes are
fitted as before and that the fan duct engages fully into the flue
duct extension piece.
The polarity of the electrical connections is not important.
10.10 Insulation
Refer to the relevant paragraphs of the servicing section to
remove the burner from combustion chamber.
Sides
Undo the burner support bracket nuts and remove support
bracket and insulation, see diagram 10.6.
Refit support bracket with new side insulation.
Rear
Bend forward rear insulation securing nibs, one on each side,
to release insulation.
Fit new insulation and bend back securing nibs.
Diagram 10.5
AIR PRESSURE
TUBE (RED)
AIR PRESSURE
SWITCH
ELECTRICAL
CONNECTORS
AIR PRESSURE
TUBE (CLEAR)
SECURING
SCREW