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12.0 CHANGING COMPONENTS
36
12.6
Burner
(Fig. 51)
1. Undo the screws securing the collector to the
venturi and extension piece. Remove this extension
piece from the cover (on 24 and 28 models).
2. Withdraw the burner from the cover and replace
with the new one.
3. Examine the gasket, replacing if necessary.
4. Reassemble in reverse order.
12.7
Insulation
(Fig. 52)
1. Remove the electrode leads, noting their positions.
Also remove the electrodes as described in section
12.2.
2. Undo the screws securing the collector to the
venturi and the nuts holding the cover to the heat
exchanger. Draw the collector and cover assembly
away.
3. Remove the cover insulation piece.
4. Fit the new insulation carefully over the burner and
align it with the slots for the electrodes.
5. The rear insulation is retained by a screw and
large washer, remove these and draw the insulation
out of the heat exchanger.
6. Examine the cover seal and replace if necessary.
Fig. 51
Cover
Burner
Gasket
Extension Piece
(Not on 33 model)
Collector
Venturi
Heat
Exchanger
Rear
Insulation
Cover
Insulation
Seal
Collector
Spark
Electrode
Sensing
Electrode
Electrode
Leads
Venturi
Fig. 52
Publication No. 5116282