Download GREENSTAR 24i/28i JUNIOR

SERVICE AND SPARES
6.8.18 AUTO AIR VENT
6.8.19 DHW TEMPERATURE SENSOR
Removal of the syphon assembly will give
access to Auto air vent. Refer to page 59.
B Ensure the domestic hot water circuit is fully drained.
B Disconnect the electrical connection from the sensor.
1. Withdraw the spring clip.
B Ensure the appliance has been fully drained.
2. Withdraw the sensor from the housing.
B Use a screwdriver or similar to rotate the air vent
anticlockwise, as shown below.
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1.
2.
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Fig. 112 Auto air vent
Fig. 114 DHW temperature sensor
1. Lift the air vent (1) out of the housing and remove.
B To refit, follow the above in reverse.
6.8.20 PUMP HEAD
B Ensure the boiler is fully drained).
1.
B Disconnect the electrical connection from the bottom
of the pump.
NOTICE: 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.
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2. Gently pull the pump towards you and remove.
Fig. 113 Auto air vent removal
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.
2.
1.
1.
1.
1.
B To refit, follow the above in reverse.
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Fig. 115 Pump head removal
B To refit, follow the above in reverse.
60
6 720 644 741a (2010/10)