Potterton Promax Combi HE Plus A Range Installation & Service Instructions Manual page 42

Gasket
Extension Piece
(On 28 models only)
Collector
Fig. 81
Spark
Electrode
Electrode
Sensing
Leads
Electrode
42
© Baxi Heating UK Ltd 2013
Cover
Burner
Heat
Exchanger
Rear
Insulation
Cover
Insulation
Seal
Fig. 82
Collector
14.0 Changing Components
14.6
1. Undo the screws securing the collector to the cover and
venturi (On 28 models there is an extension piece fitted to
the cover, remove this also.
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.
Venturi
14.7
1. Remove the electrode leads, noting their positions. Also
remove the electrodes as described in section 14.2.
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. If the rear insulation requires replacement remove it and
all debris from the heat exchanger. Also it may be necessary
to separately remove the spring clip from the pin in the
centre of the heat exchanger and the 'L' shaped clips
embedded in the insulation.
6. DO NOT remove the shrink-wrapped coating from the
replacement rear insulation. Keep the insulation vertical and
press firmly into position.
7. Examine the cover seal and replace if necessary.
Venturi
Burner (Fig. 81)
Insulation (Fig. 82)