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3.20 PUMP AUTOMATIC AIR VENT REPLACEMENT
Refer to Section
3.2
1. Drain the boiler.
Refer to Section
3.3
2. Remove the expansion vessel.
Refer to Section
3.24
3. Firstly, increase access area by disconnecting the 22
mm pipe connection at top of pump manifold and bottom
of heat exchanger and remove pipe.
4. The automatic air vent head is retained in the pump body
with a bayonet connection. The air vent head and float
assembly is removed by turning the head anti-clockwise
(viewed from above) and pulling upwards.
3.21 PUMP HEAD REPLACEMENT
Refer to Section
3.2
1. Drain the boiler.
Refer to Section
3.3
2. Disconnect the two electrical leads from the pump.
3. Remove the 4 allen screws retaining the pump head.
4. Remove the pump head.
Be aware of water spillage.
5. Fit the new pump head.
6. Reassemble in reverse order.
7. Refill the boiler.
Refer to Section
2.17
Installation and Servicing
Section 3 - Servicing
5. Reassemble. Ensure the air vent head 'o' ring seal is
fitted.
6. Ensure the air vent cap is loose.
7. Refill the boiler. Check for leaks around the new air vent
joint.
Refer to Section
2.17
Air Vent Cap
3
2
3
45
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