Pipe Connecting Clips
12.0 CHANGING COMPONENTS
12.3Heat 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.
12.4Burner (Fig. 53)
Heat Exchanger
Electrodes 
Electrode
Grommets
Electrode
Leads
Fig. 52
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.
30 | Publication No. 5111811 |
