Glow-worm sxi and Gas Valve - Manual (Page 43)

43 0020015347-03
14 Replacement of Parts
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 14.13.
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.
14.19 Automatic Air Vent
For access, refer to section 14.1.
Refer to section 12.8 and drain the boiler heating circuit.
Refer to diagram 14.14.
Unscrew the automatic air vent.
Fit the new automatic air vent and ‘O’ ring ensuring the vent cap
is left loose.
Refill, vent and pressurise the boiler.
Check for leaks.
Diagram 14.13
RETURN PIPE
FLOW
PIPE
RETURN
THERMISTOR
OVERHEAT
THERMOSTAT
FLOW
THERMISTOR
11503
RESET
SWITCH
Diagram 14.14
AUTOMATIC
AIR VENT
11507