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12 Servicing
12.5 Burner
NOTE: If the functional checks did not indicate poor
combustion then it is not necessary to service this
component.
The following procedure will require that you replace the
burner door seal and nyloc nuts.
Remove the two gas pipe bracket securing screws from
underside of inner case, see diagram 12.4.
NOTE: When replacing ensure that the sealing grommet,
situated below the gas valve is correctly re-seated.
Disconnect the gas valve electrical plug at the gas valve, see
diagram 11.3.
Disconnect the electrical plug from the fan.
Disconnect the spark electrode plug and earth lead, refer to
diagram 12.5.
Remove the five combustion chamber/burner door securing
nuts, these should be discarded and replaced with the new
nylocs nuts, see diagram 12.7, supplied in the burner door
seal kit.
Gently remove the fan, gas valve and burner assembly from
the combustion chamber.
Clean the burner with a soft brush taking great care not
to damage the front insulation. DO NOT use wire or sharp
instruments to clean the holes of the burner.
Inspect the burner for any signs of damage.
Remove and discard the burner door seal and replace with
new, see diagram 12.7.
NOTE: Removal of the burner is not necessary during a
normal service, but if it is removed it will require a new
gasket, see diagram 12.8.
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Diagram 12.8
12.6. Combustion Chamber and Heat
Exchanger.
NOTE: If the functional checks did not indicate poor
combustion then it is not necessary to service this
component.
Remove loose debris from combustion chamber using a soft
brush and vacuum cleaner.
Carefully flush by spraying water any remaining debris
through the condensate trap (Ensure the water is kept away
from electrical components).
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