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SECTION 6
GAS CONTROL
VALVE
Fig 10.
20
SERVICING
This should be checked and serviced by an engineer fully conversant with every aspect of
this piece of equipment.
To change the gas valve it is not necessary to drain down the water heater. See below
1.
Move the gas control knob to "OFF". Isolate from the electrical supply. Unhook and
remove the outer door and remove the inner door by sliding to the side on the
RFF190 model, or by removing two screws on the RFF280 model.
2.
Disconnect burner gas tube, pilot tube and blue ignition lead at gas control.
3.
Remove burner assembly complete with pipes and blue ignition lead.
4.
Disconnect electrical connection from the top of the heater. Remove the screws that
hold the flue-fan in place and remove the flue fan.
5.
Withdraw the flue baffle.
6.
Clean the flueway with a brush and clean any deposit from the underside of the
storage vessel bottom and from the flue baffle.
7.
Re-assemble in the reverse order.
IT IS IMPORTANT THAT THE BURNER IS CORRECTLY LOCATED IN THE BURNER
SUPPORT BRACKET ON BASE OF COMBUSTION CHAMBER.
8.
Re-light and carry out commissioning check as pages 16 and 17.
Retaining screws
Retaining screws
Gas control bracket
To remove gas control,
unscrew four retaining screws
at top and bottom of gas
control bracket. Also it will be
necessary to remove gas
fittings at the top of the gas
valve and the bottom of the
gas valve. It is now possible
to slide the gas control valve
away from the gas valve
retaining bracket.
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