Glow-worm Flexicom hx - Manual (Page 41)

0020107230_04 - 12/14 - Glow-worm
MAINTENANCE
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Diagram 14.3
14379
Diagram 14.4
14384
Diagram 14.5
14278
14.13 Heating Return Thermistor
For access, refer to section 14.1.
Refer to diagram 14.3.
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.
14.14 Heat Exchanger
For access, refer to section 14.1.
Drain down the boiler heating circuit
Remove the silencer front
Pull forwards to remove.
The silencer is a push fi t so no tools or fi xings are required for
its removal or fi tting, see diagram 12.8.
Remove the fl ue hood front
Ease the securing clips away from the sump to release the
retaining catch then push the fl ue hood up to disengage from
the sump, see diagram 12.5.
To remove, swivel fl ue hood 90° and pull down and out, see
diagram 12.5.
Remove the igniter unit with support bracket
Disconnect the electrical connections and ignition lead.
Release the igniter unit support bracket.
Remove the igniter unit assembly, see diagram 12.9.
Remove the gas valve/fan
Disconnect the tubing nut at the gas valve, see diagram 12.7.
Remove the fan retaining bracket, see diagram 12.10.
To ease removal of the securing nut from the fan retaining
bracket, a fl at bladed screwdriver can be used in the position
shown and gently levered down as indicated.
Remove the spark electrode plug and earth connection.
Remove the fan and gas valve electrical connections.
Remove the fan and gas valve assembly.
Remove the condensate trap
Remove the drain outlet pipe from the base of the trap, see
diagram 15.1. Remove the condensate drain securing screw
and carefully pull the trap forward, see diagram 12.13.
Drain the heat exchanger
Drain the heat exchanger using the drain point on the right hand
side of the heat exchanger, see diagram 14.4.