Worcester Greenstar Ri Manuel de service télécharger pdf (Page 42)

REPLACEMENT OF PARTS

5. Moving boiler control to service

position

5.1 Remove two screws (A)securing control.

5.2 Hang control on two lugs (B) on boiler

framework.

6. Gas valve

 Isolate gas supply at boiler gas cock.

6.1 Remove wire clip from gas valve outlet then

pull gas adjustment assembly free from

plastic connector and pull forward clear of

case.

6.2 Undo bottom gas connection to gas valve.

6.3 Undo two securing screws (C)on the

underside of casing.

 Pull valve up and forward out of boiler.

 Disconnect electrical connections.

 Replace valve with new seals and check for

gas soundness.

7. Gas adjuster

 Isolate gas supply at boiler gas cock and

repeat step 6.1 above.

 Twist retaining clip (D) to release then

remove clip and tube.

 Refit new adjuster and secure with clip.

Note: The valve will require setting, follow

procedure “Setting the gas/air ratio”.

8. Syphon

8.1 Undo plastic nut (E) on the syphon outlet.

Drop condensate tube away from syphon.

8.2 Remove two screws (F)retaining the bracket.

8.3 Rotate syphon 90° to the left and remove.

The following components require

the control to be moved in to the

service position and the bottom

tray removed:

Gas valve

Syphon

PCB fuse

Transformer

5.1 5.2

6.2

6.3

6.1

8.3

8.2

8.1

REPLACEMENT OF PARTS

INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR Ri

8 716 109 699a (05/05)

SERVICING

& SPARES

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 52 53

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Worcester Greenstar Ri Manuel de service Page 42

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