Potterton Performa 30 HE Installation & Service Instructions Manual page 30

Pipe Connecting
Clips
Heat Exchanger
Electrodes
Electrode
Grommets
Electrode
Leads
30
Fig. 50
Burner
Fig. 51
12.0 CHANGING COMPONENTS
12.3 Heat Exchanger (Fig. 50)
1. Remove the fan as described in section 12.1.
2. Drain the primary circuit. Prise the three 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.
5. Reassemble in reverse order of dismantling, and
repressurise the system.
12.4 Burner (Fig. 51)
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. 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.
Publication No. 5111815