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AU/NZ
6.8.9
Electrode assembly and burner
Refer to figure 89.
B Disconnect spark electrodes and flame sensor
connection.
B Remove clamping plate.
1. Remove spark/flame electrode assembly from heat
exchanger.
2. Remove the seal from the top of the heat exchanger.
3. Remove the burner.
B Replace new burner in correct position.
B Ensure that burner tabs, as shown in figure 89, fit
correctly their respective locations.
NOTE: CO/CO
2
B If the joint between the air/gas manifold
and heat exchanger is disturbed the
sealing gasket must be replaced .
B After completing the service of the boiler,
the CO/CO
must be checked and set to
2
the limits shown in "setting the air/gas
ratio" on page 43.
B Ensure that the new seal is fitted.
CAUTION: Clamping plate
B Ensure that the clamping plate is firmly
tightened down on top of the heat
exchanger.
B Replace the clamping plate.
1.
3.
Fig. 89 Electrode assembly and burner
checks
2.
6.8.10 Heat exchanger
B Isolate flow and return valves then drain the boiler.
B Remove syphon.
Refer to figure 90.
1. Remove the clip from plastic elbow on the flow pipe.
2. Move flow pipe away from heat exchanger.
2.
Fig. 90 Flow pipe removal
Refer to figure 91
1. Remove the three screws securing the turret to the
top of the boiler.
2. Turn the upper exhaust connector clockwise to
release from the hook.
3. Move the upper exhaust connector down.
3.
Fig. 91 Upper exhaust assembly
Service and spares | 51
1.
6720643895-82.1Wo
1.
2.
6 720 646 195a (2010/11)
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