Main Gas Valve - Chaffoteaux & Maury Britony FlexiFlue Installation And Servicing Instructions

6.4
6.5
6.6
Heating Body
a) The heat exhcanger can be examined in posi-
tion :
- Remove combustion
chamber front panel as in
Section 6.2 if not already removed. Prior to clea-
ning the heat exchanger adequate precaution
should be taken to protect the pilot burner/gas val-
ve assembly to prevent the ingress of dust etc.
- If extensive cleaning is necessary, the heat exchan-
ger will need to be removed asfollows.
bl To remove heat exchanger
- Slide out combustion lining and retain.
- Disconnect the unions on either side of the heat
exchanger.
- Remove
two screws securing the combustion
chamber/heating body assembly to the rear panel.
- Remove heat exchanger and combustion chamber.
- Remove two screws at the rear of the combustion
chamber securing the combustion chamber to the
heat exchanger to seperate the components.
Care should be taken when handling the heating
exchanger to ensure that the fins are not dama-
ged.
- Replace in reverse order.
Descaling
PeriodIcally it may be necessary to remove scale deposits from the waterways of the appliance to ensure conti-
nued and efficient operation.
The frequency will depend largely on the hardness of the water in each specific area. If this is necessary contact
your local water authority for advice.
Advice with regard to descaling is available from Chaffoteaux Ltd.
Main Gas Valve
To inspect and clean
- Remove the burner (see Section 6.2)
- Disconnect the thermocouple at the PCB and igni-
tor lead from the piezo unit.
- Remove the four screws and washers fastening
the top of the gas section to the base and the two
screws at the back holding it to the rear case.
- Lift the gas section top off the base, taking care
not to damage the cork gasket.
- Remove the hexagonal spring retainer (A) from the
top of the assembly (20 mm).
- Remove the spring and gas valve and clean the Val-
ve seating (B).
- Renew facing rubber washer on the gas Valve if ne-
cessary.
- Grease spindle see Section 6.11
- Replace in reverse order,ensuringthatthe hexagonal
Spring
retaining nut is screwed fully down,
- DO not change the setting of the valve body
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