Glow-worm 18-30sxi Range - Manual (Page 41)

41 0020008155A
14 Replacement of Parts
14.11 Expansion Vessel
For access, refer to section 14.1.
Refer to section 12.8 and drain the boiler heating circuit.
Undo the coupling at the base of the vessel, see diagram 14.8.
While holding the vessel remove the securing bolt on the top
panel of the boiler and upper support bracket on top of the
expansion vessel.
Lift the vessel up, draw bottom out to the left, lower and remove.
Fit the replacement unit.
Refill, vent and pressurise the boiler.
Check for leaks.
14.12 Heat Exchanger
For access, refer to section 14.1.
Refer to section 12.3 for removal of the fan, gas valve and
burner assembly.
Drain the boiler heating circuit, see section 12.8.
Remove the clip securing the clear condense pipe to heat
exchanger.
Pull to remove the condense pipe out of the bottom of the heat
exchanger.
Undo the two nuts of the flow and return pipes from the heat
exchanger.
Move the pipes away from the heat exchanger.
Loosen the three heat exchanger securing screws and clamps
(two at the top and one at the bottom) to remove the heat
exchanger, see diagram 14.9.
CAUTION: There will be water in the heat exchanger.
Remove condense pipe connector from bottom of heat
exchanger.
Carefully ease heat exchanger out.
14.13 Flue Hood
For access, refer to section 14.1.
Refer to diagram 14.10.
Remove heat exchanger as per section 14.12.
Remove the two securing screws and pull the flue hood down
and away from the flue hood bracket and flue elbow, see
diagram 14.10.
14.14 Pump (head only)
For access, refer to section 14.1.
Refer to section 12.8 and drain the boiler heating circuit.
Refer to diagram 14.11.
Remove the four cap head screws.
Carefully remove the pump head together with cable, do not
strain cable.
Support the pump head, unscrew cable cover at the side of
pump head and remove.
Disconnect wiring from pump head.
Reconnect wiring to new pump head and fit cover.
Fit the new pump head with ‘O’ ring.
Refill, vent and pressurise the boiler.
Check for leaks.
Diagram 14.9
FLOW AND
RETURN PIPE
NUTS
SECURING SCREWS
AND CLAMPS
11490
Diagram 14.10
FLUE HOOD
SECURING
SCREWS
11602