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15 Replacement of Parts
Diagram 15.14
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Diagram 15.15
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Remove the burner
Remove the anged nuts and studs that secure the burner,
note that two studs at the rear also hold the fan clamping
bracket, see diagram 15.15.
Taking great care not to damage the surface of the burner.
NOTE: Replace the burner gasket and follow the tightening
sequence when re-tting the burner, see diagram 15.15.
NOTE: Fit all replacement gaskets and seals when re-tting
parts.
Filling the boiler heating circuit/domestic hot water
system and re-pressurising
After replacing parts open the cold-water isolation valve and
slowly open a hot water tap to remove air. Close the hot water
tap and check for any leaks.
After replacing parts, close the drain valve and remove the
hose. Open the heating ow and return isolating valves and
rell, vent and pressurise the heating circuit, refer to Section
12, Commissioning.
RETAINING
CLIP
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