Each time the components are replaced, comply with the safety instructions below for
your own safety and to avoid damage to the appliance!
● Put the appliance out of operation.
NOTE:
Before starting any maintenance work: Isolate the mains electricity supply by
disconnecting the plug at the socket outlet (if there is only an isolating switch remove the
fuse from the switch).
● Close the service valve in the gas supply.
● Isolate the boiler flow and return if possible.
● Empty the appliance if you want to replace water bearing components of the appliance!
● Make sure that no water drops on live components (e.g. switch box etc.)!
● Use only new seals and O-rings!
● After completing the work, check for gas leaks and perform a function check (see section
7)!
● Always check earth continuity, polarity and resistance to earth with a multimeter after any
service work and after exchanging any electrical component.
11.2 Replacing the burner.
For access refer to section 8.1.4.
Remove the burner refer to section 8.1.6
11.3 Replacing the gas valve
For access refer to section 8.1.4.
● Remove the gas valve, fan and burner refer to the relevant parts of section 8.1.6.
● Before removing the gas valve note its position on the fan.
● Remove the three securing screws, which fix the gas valve, plastic swirl plate to the
venturi on the fan.
● Remove the gas valve.
● Remove the gas supply pipe from the gas valve.
● When refitting the gas valve take care as it can be fitted more than one way.
After assembly test for gas soundness and purge in accordance with the current issue of
BS6891 or in IE, the current edition of I.S.813 “Domestic Gas Installations”.
11.4 Replacing the fan
● Remove the gas valve refer to section 11.3.
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