Glow-worm Flexicom cx - Manual (Page 31)

0020107232_03 - 12/14 - Glow-worm
MAINTENANCE
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12.2 Spark Electrode
NOTE: If the functional checks did not indicate poor
combustion then it is not necessary to service this
component.
Ease the securing clips away from the sump to release the
retaining catch then push the flue hood up to disengage from
the sump, see diagram 12.5.
To remove, swivel flue hood 90 o and pull down and out, see
diagram 12.5.
Check seal for wear or damage and replace if necessary.
IMPORTANT: Do not allow fixings, nuts, screws, etc. to fall
into the open flue hood sump, use a temporary cover whilst
removing any parts.
Disconnect the spark electrode plug and earth lead. Remove
the two securing screws and withdraw the spark electrode
carefully from the combustion chamber, see diagram 12.6.
Inspect the tips for damage.
Clean away any debris and check the spark gap is 4mm.
Check the electrode gasket for signs of damage and replace if
necessary.
12.3 Burner
NOTE: If the functional checks did not indicate poor
combustion then it is not necessary to service this
component.
Disconnect the gas supply at the gas valve and electrical
connections, see diagram 12.7.
The Silencer (front) is a push fit, so there is no need for tools to
remove or fit, see diagram 12.8.
Release the igniter unit support bracket, see diagram 12.9.
Remove the fan retaining bracket.
To ease removal of the securing nut from the fan retaining
bracket, a flat bladed screwdriver can be used in the position
shown and gently levered down as indicated, see diagram
12.10.
Remove the fan and gas valve assembly.
The silencer (rear) is a push fit so no tools are required for its
removal or fitting, see diagram 12.9.
Check the spark electrode gap is 4mm. Clean and adjust as
necessary, see diagram 12.6.
It should not be necessary to remove the spark electrode from
the burner during servicing.
Remove the flanged nuts and studs that secure the burner, note
that two studs at the rear also hold the fan clamping bracket,
see diagram 12.12.
Clean the burner with a soft brush taking great care not to
damage the surface of the burner. DO NOT use wire or sharp
instruments to clean the mesh of the burner.
NOTE: The burner gasket should be inspected but will not need
replacing unless there are signs of wear or damage.
Follow the tightening sequence when re-fitting the burner, see
diagram 12.12.
12.4 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 inside the heat exchanger using a
soft brush and vacuum cleaner.
Carefully flush by spraying water into the heat exchanger, any
remaining debris should pass through the condensate trap
(Ensure the water is kept away from electrical components).
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Diagram 12.5
Diagram 12.6
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