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6 2 MAINS SWITCH REPLACEMENT
1. Refer to Frame 49.
2. Remove the casing. Refer to Frame 41.
3. Remove the securing screw fixing the mains switch.
4. Pull out the mains switch by squeezing the plastic retain
clips at the back.
5. Disconnect the electrical leads from the mains switch.
6. Fit the new switch, ensuring that the electrical leads are
replaced on the correct terminals and the plastic springs
are correcty positioned.
7. Re-assemble in reverse order.
6 3 PRESSURE GAUGE REPLACEMENT
1. Refer to Frame 49.
2. Remove the casing. Refer to Frame 41.
3. Remove the expansion vessel and shield/air guide. Refer
to Frame 43.
4. Drain the boiler. Refer to Frame 44.
5. Unclip the temperature sensor.
6. Unscrew the pressure gauge nut.
40
SERVICING
7. Swing the control housing into the service position.
8. Pull out the pressure gauge pipe and temperature sensor
pipe from the rear frame and pull out the pressure gauge
by squeezing the plastic retaining clips together at the
back from the plastic bracket.
9. Reassemble in reverse order using new seals if
necessary.
10.Refill and pressurise the system. Refer to Frames 4 and
28.
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combination boiler -
Installation and Servicing
8
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