Bosch Greenstar 12i Service Manual download pdf (Page 59)

SERVICE AND SPARES

6 720 644 743b (2011/08)

6.8.18 AUTO AIR VENT

B Ensure the appliance has been fully drained.

B Use a screwdriver or similar to rotate the air vent

anticlockwise, as shown below.

Fig. 114 Auto air vent

1. Lift the air vent (1) out of the housing and remove.

Fig. 115 Auto air vent removal

B To refit, follow the above in reverse.

6.8.19 PUMP HEAD

B Ensure the boiler is fully drained).

B Disconnect the electrical connection from the bottom

of the pump.

1. Remove the four Allen bolts securing the pump at

each corner.

2. Gently pull the pump towards you and remove.

Fig. 116 Pump head removal

B To refit, follow the above in reverse.

6.8.20 DRAIN TAP

B Ensure the appliance has been fully drained.

1. Rotate the drain tap fully anticlockwise.

2. Withdraw the drain tap from its housing

Fig. 117

B To refit, follow the above in reverse. Ensure any seals

that have been disturbed are renewed.

Removal of the syphon assembly will give

access to Auto air vent. Refer to page 58.

NOTICE:

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.

6720643895-85.1Wo

6720644743-30.1Wo

NOTICE: Water damage

B Protect the Control unit from water

ingress when removing the Pump head.

6720643895-88.1Wo

6720644743-33.1Wo

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Bosch Greenstar 12i Service Manual Page 59