Ideal Heating LOGIC+ SYSTEM S30 - 3.25 CH WATER PRESSURE SWITCH REPLACEMENT; 3.26 CONTROL; NO FLOW THERMISTOR REPLACEMENT

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Installation and Servicing
SECTION 3 - SERVICING
3.24 PUMP HEAD REPLACEMENT
1. Refer to Section 3.9.
2. Drain the boiler. Refer to Section 3.20.
3. Remove the expansion vessel. Refer to Section 3.28.
4. Firstly, increase access area by disconnecting the 22mm
pipe connection at top of pump chamber and bottom of
heat exchanger and remove pipe.
5. The automatic air vent head is retained in the pump body
with a bayonet connection. The air vent head and oat
assembly is removed by turning the head anti-clockwise
(viewed from above) and pulling upwards.
6. Reassembly is the reverse of the above. Ensure the air
vent head ‘o’ ring seal is in place when retting and the
new ‘o’ ring is tted to the return pipe top connection.
7. Ensure the air vent cap is loose.
8. Rell the boiler. Refer to Section 2.19. Check for leaks
around the new air vent joint.
9. Check the operation of the boiler. Refer to Sections 2.25
& 2.26.
5
Dust Cap
3.23 PUMP AUTOMATIC AIR VENT REPLACEMENT
1. Refer to Section 3.9.
2. Drain the boiler. Refer to Section 3.20.
3. Disconnect the two electrical leads from the pump.
4. Remove the 4 Allen screws retaining the pump head.
5. Remove the pump head.
6. Fit the new pump head.
7. Reassemble in reverse order.
8. Rell the boiler. Refer to Section 2.19.
9. Check operation of the boiler. Refer to Sections 2.25 & 2.26.
3
4
SERVICING