All routine servicing requirements can be achieved by the removal of the front casing, inner
case and chassis panel only.
● Remove the two screws on the underside of the front casing and lift off.
● Remove the two screws on the front of inner case and lift off, see fig 8.1.
● Drop down the electronics box into the service position.
● Remove the four screws from the chassis panel, see fig 8.2. Remove the chassis panel
by pulling it out at the top from its retaining slots.
NOTE:
When replacing chassis front panel ensure the bottom fits behind lip.
Unless stated otherwise any part removed during servicing should be replaced in the reverse
order to removal. With the appliance operational carry out the following functional checks:
1. Check the combustion, preferably with a flue gas analyser, see section 9.
2. Should the combustion measurement or flame and gas valve be correct, then it is not
necessary to remove the burner assembly for a service.
3. Check the operational performance of the central heating agrees with the technical
specification.
Fig. 8.2 Control panel
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