Supplied By www.heating spares.co Tel. 0161 620 6677
16
220562A
Diagram 7.3
7 S e r v i c i n g
Diagram 7.4
7.7 Thermocouple and Electrode
Inspect and clean the tips of both items.
Check that the electrode spark gap is as shown in
diagram 7.3.
7.8 Gas Tap and Micro Switch Assembly
Note. This item need not be serviced every year.
If servicing is required, remove the leads at the
microswitch and electrode then disconnect all union
connections at the tap, see diagram 7.5.
Disconnect the thermocouple from the tap, see
diagram 7.2.
Remove the bottom split pin from the connecting drive
rod, see diagram 7.5.
Disconnect the gas supply pipe union and remove the
pipe.
To remove the gas tap and micro switch remove the two
screws from the gas tap bracket, see diagram 7.5 and
withdraw the tap complete with bracket.
To service the gas tap, remove the operating disc, see
diagram 7.6 and lift off.
Remove the gas tap niting plate securing screws, see
diagram 7.6. Take care as there is a spring beneath the
niting plate. Remove the plug, pin, spring washer, plain
washer and “O” ring, see diagram 7.6.
Clean and relubricate using a suitable grease.
When replacing make sure the operating disc, with
circlip underneath, micro switch and leads are correctly
located, see diagram 7.6 and 7.4.
ELECTRODE DETAIL
4026
Electrode tip must fall
within boxed area
3 to
5mm
1mm
THERMOCOUPLE
DETAIL
Centreline of thermocouple must
fall within boxed area on third row
of ports
208 CHECK DIMENSION
3.5 to
4.5mm
2mm
2mm
2mm
1mm
EARTH
LEAD
MICRO
SWITCH
LEADS
IGNITION
LEAD
WIRING
HARNESS
STRAIN RELIEF
LOCKNUT
R.H. SECURING
BRACKET
SECURING
SCREW
4023
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