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56 | Service and spares
6.8.18 Auto air vent
Removal of the syphon assembly will give
access to the auto air vent. Refer to page
55.
B Ensure the boiler has been fully drained.
B Use a screwdriver or similar to rotate the air vent
anticlockwise, as shown below.
Fig. 105 Auto air vent
1. Lift the air vent (1) out of the housing and remove.
Fig. 106 Auto air vent removal
NOTE:
B The "O" ring must be fitted to the Auto air
vent and not the hydraulic block
otherwise the auto air vent will be
difficult to fit.
B Apply silicone lubricant to the "O" ring to
ease assembly.
B To refit, follow the above in reverse order.
6 720 646 195a (2010/11)
6720643895-85.1Wo
1.
6720644743-30.1Wo
6.8.19 Pump head
B Ensure the boiler is fully drained).
B Disconnect the electrical connection from the bottom
of the pump.
NOTE: Water damage
B Protect the control unit from water
ingress when removing the pump head.
1. Remove the four Allen bolts securing the pump at
each corner.
2. Gently pull the pump towards you and remove.
Fig. 107 Pump head removal
B To refit, follow the above in reverse.
6.8.20 Drain tap
B Ensure the boiler has been fully drained.
1. Rotate the drain tap fully anticlockwise.
2. Withdraw the drain tap from its housing
6.
5.
2.
Fig. 108 Drain tap
B To refit, follow the above in reverse. Ensure any seals
that have been disturbed are renewed.
AU/NZ
1.
1.
2.
1.
1.
6720643895-88.1Wo
1.
4.
3.
6720644743-33.1Wo
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