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16.18 (F28e ONLY) Flow Sensor
For access, refer to section 16.1.
Refer to section 13.10 and drain the boiler hot water circuit.
Refer to diagram 16.15.
Remove the electrical connection to the flow sensor.
Remove the securing clip between the flow sensor and the plate
to plate heat exchanger.
Undo the coupling to the cold water inlet pipe.
Remove flow sensor.
Remove flow restrictor and fit to replacement.
Fit new 'O' rings.
After replacing the flow sensor, open the cold-water isolation
valve and slowly open a hot water tap to remove air.
Close the hot water tap and check for any leaks.
16.19 (F28e ONLY) Reduced Pressure Zone
Valve and Filling Loop Tubes Assembly
For access, refer to section 16.1.
Refer to diagram 16.16.
Remove the retaining clips to remove the reduced pressure
zone valve and filling loop tubes assembly.
Fit new 'O' rings.
Replace the reduced pressure zone valve and filling loop tubes
assembly, refill, vent and pressurise the boiler.
Check for leaks.
16.20 (F28e ONLY) Filling Loop Valve.
For access, refer to section 16.1.
Refer to section 13.10 and drain the boiler hot water circuit.
Refer to diagram 16.16.
Remove the clip securing the filling loop valve to the domestic
water inlet. Disengage by pulling forward.
Remove the clip securing the filling loop to the valve.
Remove the valve from the filling loop.
Fit new 'O' rings.
After replacing the filling loop valve open the cold water isolation
valve and slowly open a hot water tap to remove air. Close the
hot water tap and check for any leaks.
16 Replacement of Parts
COUPLING
(F28e ONLY)
FILLING
LOOP TUBE
(F28e ONLY)
53
AIR VENT
SEAL
Diagram 16.14
SECURING
BRACKET
SECURING
CLIP
Diagram 16.15
RETAINING
CLIPS
Diagram 16.16
FLOW
SENSOR
REDUCED
PRESSURE
ZONE VALVE
FILLING
LOOP TUBE
2000225242A
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