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14 Replacement of Parts
14.10 Expansion Vessel
For access, refer to section 14.1.
Drain the boiler heating circuit, refer to section 14.2.
Undo the coupling at the base of the vessel, see diagram
14.8.
Remove the locking screw and spacer from the retaining
bracket at the top of the expansion vessel. Whilst holding
and also pushing down slightly on the vessel, remove the
expansion vessel retaining bracket by unhooking and sliding
forward.
The expansion vessel can now be removed by sliding it for-
ward clear of its support guides.
When re-fitting a new gasket will be required between the
expansion vessel and coupling.
Refill, vent and pressurise the boiler.
Check for leaks.
Diagram 14.8
12665
Diagram 14.7
12673
14.11 Fan/Gas valve assembly
For access, refer to section 14.1.
Undo the tubing nut to remove the gas valve from the gas
pipe and any electrical connections, see diagram 14.4.
Remove the securing nut holding the fan retaining bracket,
press down on burner to ease removal of securing nut. Slide
out the fan retaining bracket.
Lift front of bracket away from stud and pull forward to re-
lease the fan, see diagram 14.5.
Lift fan/gas valve assembly up and forward away from locat-
ing studs.
Remove fan gasket and replace if necessary.
To replace the fan and retaining bracket correctly, insert into
slots on fan clamping bracket, see diagram 14.11, and locate
onto lugs on the burner.
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