Technical data

56
2000225294A
16 Replacement of Parts
Diagram 16.9
Diagram 16.10
SAFETY
DISCHARGE
VALVE
Diagram 16.11
16.12 Safety Discharge Valve
For access, refer to section 16.1.
Drain down the heating circuit, see section 13.9.
Refer to section 13.9 and drain the boiler heating circuit.
Refer to diagram 16.9
Undo the safety discharge valve coupling and remove from the
pipework.
Remove the securing clip and withdraw the safety discharge
valve.
Fit new 'O' ring.
Refill, vent and pressurise the boiler.
Check for leaks.
16.13 (F24e/F28e ONLY) Domestic Hot Water
Thermistor
For access, refer to section 16.1.
Refer to diagram 16.10.
Remove the electrical connections from the thermistor.
Remove the thermistor and retaining clip.
Fit the replacement thermistor using the heat sink compound
supplied.
Note: When reconnecting electrical connections, polarity is not
important.
Carry out a functional test of the controls.
16.14 Central Heating Flow Thermistor
For access, refer to section 16.1.
Refer to diagram 16.11.
Remove the electrical connections from the thermistor.
Remove the securing screw from retaining clip.
Fit the replacement thermistor using the heat sink compound
supplied, do not overtighten when replacing securing screw.
Note: When reconnecting the polarity of the wiring to thermistors
is unimportant.
CENTRAL
HEATING
FLOW
THERMISTOR
SECURING
CLIP
COUPLING
DOMESTIC
HOT WATER
THERMISTOR
SECURING
SCREW
12215
12214
(F24e & F28e SHOWN )
(F24e/F28e ONLY)