Baxi Combi Instant 80e Installation & Servicing Instructions Manual page 32

Pipe Connecting
Clips
Heat Exchanger
(Instant 105e model)
Pipe Connecting
Clips
Electrodes
Electrode
Grommets
Electrode
Leads
32
Heat Exchanger
(Instant 80e model)
Fig. 48
Burner
Fig. 49
12.0 Changing Components
12.3 Heat Exchanger (Fig. 48)
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. 49)
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 (Instant 105e model only). Draw the burner
out of the combustion box, pulling the electrode
grommets from the slots in the combustion box lower
panel.
3. Disconnect the electrode leads and grommets from
the electrodes. Completely remove the burner.
4. Undo the screws securing the electrodes to the
burner. Examine the condition of the electrodes,
replacing if necessary. Fit the electrodes to the new
burner.
5. Engage the burner location brackets over the studs on
the injector manifold and reassemble in reverse order.