12 servicing, Attention! 12. 6 combustion check – Glow-worm Energy Saver Combi 2 and Gas Valve User Manual
Page 27
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221854B
12 Servicing
SPARK GAP
3.5
+
0.5mm
Diagram 12.7
6550
WATER
INLET
FILTER
Diagram 12.8
9061
SPARK
ELECTRODE
SECURING
SCREW (2 OFF)
ELECTRODE
GASKET
SPARK
ELECTRODE
LEDGE
Diagram 12.6
6545
SECURING
PLATE
Ensure the securing plate forks
are supported on the ledge.
Fan removed for clarity
Open one or more hot water taps to drain the hot water circuit.
Undo and remove the drain screw on the cold water inlet valve
and drain away any remaining water.
Undo the connecting nuts on either end of the water inlet pipe
and remove the pipe from the boiler.
Remove the filter situated in the copper tube below the flow
restrictor, see diagram 12.8.
Clean the filter, inspect and renew if necessary.
Replace the filter into the cold water inlet pipe. Replace the drain
screw in the cold water isolation valve. Replace the water inlet
pipe and tighten the unions.
Open the cold water isolating valve and test the Domestic Hot
Water circuit for soundness.
12.8 Casing Panel Removal
During major servicing or replacement of parts it may be
necessary to remove the boiler side panels to gain access.
Remove the front panel and the control door. See section 11.7.
To remove a side panel undo and remove the four screws
securing the lower panel brackets to the boiler.
Remove the brackets along with the control door.
Undo and remove the four screws securing each side panel to
the boiler, two at the bottom and two at the top.
Pull the panel out at the bottom and off at the top of the boiler.
12.9 Draining of Boiler Heating Circuit
Drain down the Heating Circuit of the boiler only, by closing the
heating flow and return isolating valves on the wall mounting jig,
see diagram 8.1. These valves are closed when the slots are at
right angles to the direction of flow.
Lift the head of the pressure relief valve on the underside of the
boiler by twisting and allow the boiler circuit to drain. Complete
draining by removing the drain screws from the isolating valves
and drain the water into a suitable receptacle.
After servicing or replacing parts, open the heating flow and
return isolating valves and refill, vent and pressurise the heating
circuit. See section 11.2.
Check for leaks.
12.10 Draining of Boiler Hot Water Circuit
Drain the Domestic Hot Water circuit by closing the cold water
isolation valve on the wall mounting jig.
Open one or more hot water taps to drain the hot water circuit.
Undo and remove the drain screw on the cold water isolation
valve and drain away any remaining water, see diagram 8.1.
After servicing or replacing parts, replace the drain screw, 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.
FLOW
RESTRICTOR