Glow-worm 18-30sxi Range - Manual (Page 42)

42 0020008155A
14 Replacement of Parts
Diagram 14.11
Diagram 14.12
PUMP HEAD
CAP HEAD
SCREW (4)
14.15 Safety Discharge Valve
For access, refer to section 14.1.
Refer to section 12.8 and drain the boiler heating circuit.
Refer to diagram 14.12.
Undo the safety discharge valve union and remove from the
pipework.
Remove the securing clip and withdraw the safety discharge
valve.
Refill, vent and pressurise the boiler.
Check for leaks.
14.16 Heating Flow Thermistor
For access, refer to section 14.1.
Refer to diagram 14.13.
Remove the electrical connections from the thermistor.
Remove the retaining clip from the flow pipe.
Remove the thermistor from the retaining clip.
Note that the polarity of the wiring to thermistors is unimportant.
14.17 Heating Return Thermistor
For access, refer to section 14.1.
Refer to diagram 14.15.
Remove the electrical connections from the thermistor.
Remove the retaining clip from the return pipe.
Remove the thermistor from the retaining clip.
Note that the polarity of the wiring to thermistor is unimportant.
14.18 Overheat Thermostat
For access, refer to section 14.1.
Refer to diagram 14.13.
Remove the electrical connections from the overheat stat.
Remove the retaining clip from the return pipe.
Remove the overheat stat from the retaining clip.
Ensure that the replacement thermostat is correctly located on
the flat on the return pipe and carefully push the thermistor clip
into place.
OUTLET
CONNECTOR CABLE
COVER
11507
SAFETY
DISCHARGE
VALVE
11694
Diagram 14.13
RETURN
PIPE
FLOW
PIPE
RETURN
THERMISTOR
OVERHEAT
THERMOSTAT
FLOW
THERMISTOR
11503
RESET
SWITCH