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2000225013B
14 Replacement of Parts
Diagram 14.15
RETURN
PIPE
FLOW
PIPE
RETURN
THERMISTOR
OVERHEAT
THERMOSTAT
Diagram 14.16
AUTOMATIC
AIR VENT
14.21 Low Water Pressure Sensor
For access, refer to section 14.1.
Refer to section 12.8 and drain the boiler heating circuit.
Refer to diagram 14.17.
Disconnect the electrical lead by pushing up retaining tab and
withdraw lead plug.
Remove the retaining clip to remove the low water pressure
sensor.
Fit the new low water pressure sensor. Refill vent and pressurise
the boiler.
Check for leaks.
14.22 Bypass Tube
For access, refer to section 14.1.
Refer to section 12.8 and drain the boiler heating circuit.
Refer to diagram 14.17.
Remove the retaining clips to remove the bypass tube.
Replace the bypass tube, refill, vent and pressurise the boiler.
Check for leaks.
14.23 Automatic Bypass Valve
For access, refer to section 14.1.
Refer to section 12.8 and drain the boiler heating circuit.
Refer to diagram 14.17.
Remove the retaining clip to remove the bypass valve.
Replace the reduced pressure zone valve, refill, vent and
pressurise the boiler.
Check for leaks.
14.24 Central Heating Filter
Refer to section 12.7.
14.25 Heating Circuit Drain Point
Refer to section 12.8 to drain the boiler heating circuit.
Refer to diagram 14.18.
Remove the retaining clip to remove the drain point.
Replace the draining point, refill, vent and pressurise the boiler.
Check for leaks.
FLOW
THERMISTOR
