Baxi 35/80 IE, Installation & Servicing Instructions Manual

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1. Note the positions of the two sensing tubes on the outlet elbow and three wires on the fan
motor and remove them.
2. Slacken the screws on the outlet sealing collar. Ease the collar upwards as far as possible.
3. Remove the four screws securing the combustion box door and remove the door.
4. Remove the spring clips retaining the air box side baffle plates. Disengage the tabs on the
baffles from the slots in the fan hood.
5. Undo the screws securing the fan hood to the appliance back panel, and draw the fan and
hood assembly forwards.
6. Drain the primary circuit. Prise the two pipe connecting clips off the joints in the flow and
return pipes.
7. Lift the heat exchanger to disconnect the flow and return pipe joints. Withdraw it from the
appliance, taking care not to damage the rear insulation piece.
8. Fit the new heat exchanger.
9. Reassemble in reverse order of dismantling, and repressurise the system.
12.4 Burner ( Fig. 48 )
Fig. 48
1. Remove the four screws securing the combustion box door and remove the door.
2. Undo the screws securing the burner to the injector manifold (60/100 IE model only). Draw
the burner out of the combustion box, pulling the electrode grommets from the slots in the
combustion box lower panel.