Baxi Potterton 47-393-40, 47-393-39 Burner Fig, Insulation Fig, Burner Gasket Extension Piece

Cover

14.0 Changing Components

Burner

Gasket

Extension Piece

(On 28 models only)

Venturi

Collector

Fig. 81

Heat

Exchanger

Rear

Insulation

Spark

Electrode

Venturi

Cover

Insulation

Seal

Fig. 82

Collector

Electrode	Sensing
Leads	Electrode

44© Baxi Heating UK Ltd 2012

14.6Burner (Fig. 81)

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.

14.7Insulation (Fig. 82)

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.