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Heat Exchanger
Fig. 52
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Electrode
Leads
Burner
Fig. 53
12.0
CHANGING
COMPONENTS
12.3
Heat Exchanger (Fig. 52)
1. Remove the fan as described in section 12.1.
2. Drain the primary circuit. Prise the pipe connecting
clips off the joints in the flow and return pipes.
Remove the heat exchanger return pipe.
3. Lift the heat exchanger to disconnect the flow pipe
joint. Withdraw it from the appliance, taking care not
to damage the rear insulation piece.
4. Fit the new heat exchanger, ensuring that the tabs
on the side insulation carriers engage in the slots in
the heat exchanger side plates.
5. Reassemble in reverse order of dismantling, and
repressurise the system.
12.4
Burner
(Fig. 53)
1. Remove the four screws securing the combustion
box door and remove the door.
2. 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.
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