Potterton Flamingo RS40, Installation And Service Manual

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6. Undo the lower screw securing cover at the rear and pivot downwards.
7. Break the union at the main gas cock, then unscrew the four screws securing the burner gas supply
pipe to the outlet of the valve, remove the two hex, head screws securing the valve to the support bracket
and lift away the valve.
8. Remove the inlet fittings from the old valve and fit them to the new one.
9. Replacement is the reverse of removal.
10. Test the boiler as described in 6, ‘Final Adjustment’ .
f. Boiler Thermostat
1. Turn off the boiler main gas cock.
2. Switch off the main electricity supply to the boiler.
3. Pull off the thermostat knob, then unscrew the captive screw securing the controls cover and slide the
cover from the boiler.
4. Unscrew the two captive securing screws at the bottom of the casing and the single captive screw at the
top, then withdraw the casing.
5. Withdraw the thermostat phial from its pocket in the heat exchanger.
6. Unscrew the backnut from around the spindle of the thermostat then remove the thermostat complete
with its capillary. Note the route of the capillary so the new capillary can be similarly routed.
7. Disconnect the two electrical leads from the thermostat.
8. Replacement is the reverse of removal. Ensure that the thermostat phial is inserted to the full depth of
its pocket.
9. Test the boiler as described in 6, ‘Final Adjustment’ .
g. Igniter Generator
1. Turn off the boiler main gas cock.
2. Switch off the main electrical supply to the boiler.
3. Pull off the thermostat knob, then unscrew the captive screw securing the controls cover to the boiler
and pull off the cover.
4. Pull off the lead to the generator.
5. Unscrew the two securing screws and nuts and remove the generator.
6. Replacement is the reverse of removal.
7. Test the boiler as described in 6, ‘Final Adjustment’ .
h. Igniter Lead
1. Carry out operations (1) to (4) under ‘ B’ Pilot Burner and Injector’ .