Supplied By www.heating spares.co Tel. 0161 620 6677
16
Part No. 5000893
Servicing
5. Servicing
Note:
In hard water areas, scale may build
up on the push rod, seals and on the
underside of the diaphragm housing. They
may require regular descaling and
regreasing.
Operate the appliance noting any faults in the
component units.
Carry out the servicing procedure then
correct any other faults by reference to
'Replacement of Parts', in which section you
will find details of how to dismantle and
reassemble the following detailed
components.
Check that the burner ignition is smooth and
quiet when a hot tap is opened. The burner
ignition has been factory set and should not
need adjustment. However, if adjustment is
required a slow ignition screw is fitted to the
appliance and is situated above the cap
screw in the water governor body (Fig.23).
The screw is factory set 2 full turns out (anti-
clockwise) from the fully in position. Turning
the screw clockwise delays the ignition, anti-
clockwise advances the ignition.
WARNING:
NEVER OPERATE THIS APPLIANCE
WITH THE OUTER CASE REMOVED.
1. Check the piezo unit, flame safety device
and thermocouple, clean or replace if
necessary.
2. Remove the burner assembly and clean
using a soft brush or vacuum cleaner.
3. Check the pilot injector and clean or
replace if necessary. Also clean the lint
filter.
4. Remove the water governor assembly
complete with push rod. Replace the
seals if necessary. Descale and regrease
the push rod, washers and diaphragm
housing using Dow Corning 111 silicone
grease.
5. Check for water and gas soundness.
Replace 'O' rings, sealing washers and
gaskets where required.
6. Clean any deposits off the heating unit by
washing or brushing. Descale the heating
unit if required.
Fig. 21
Fig. 22
Fig. 23
