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20 replacement of parts – Glow-worm Xtramax User Manual

Page 35

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20 Replacement of Parts

20.3 Domestic hot water storage vessel
thermistor

Before starting refer to the front of Section 20 Important
information.

• Remove the front panel, refer to Section 17.3.

• Lower the control panel, refer to Section 17.5.

• Unscrew and remove two screws securing right hand side
panel to boiler.

• Swing out side panel to gain access to thermistor on right hand
side of cylinder.

• Disconnect plug connection to thermistor lead.

• Remove plug of insulation from right hand side of cylinder, see
diagram 20.4.

• Peel off the self adhesive thermistor, see diagram 20.4.

• Fit replacement thermistor.

20.4 Fan, refer to diagram 17.4

Before starting refer to the front of Section 20 Important
information.

• Remove the front panel, refer to Section 17.3.

• Remove the sealed chamber cover, refer to Section 17.4.

• Disconnect electrical connections from fan.

• Unscrew and remove two fan retaining screws at front edge of
mounting plate.

• Remove fan with mounting plate attached by pulling forwards
out of the boiler.

• Remove fan from mounting plate.

• Fit replacement fan.

Note: When re-fitting, make sure that the two lugs on the fan
mounting plate engage in the flue hood.

• Reconnect electrical leads.

20.5 Air pressure switch

Before starting refer to the front of Section 20 Important
information.

• Remove the front panel, refer to Section 17.3.

• Locate air pressure switch situated outside combustion chamber
on top right hand side, see diagram 20.5.

• Remove air pressure switch tubes from sensing probe on flue
hood and combustion chamber.

• Disconnect air pressure switch electrical connections.

• Undo screws on top of boiler securing air pressure switch to
boiler and remove switch.

• Transfer mounting bracket from old air pressure switch to new
air pressure switch.

• Fit replacement switch, ensuring that pressure sensing tubes
are fitted to correct connections on switch.

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Diagram 20.5

9347

Diagram 20.4

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INSULATION
PLUG

SELF ADHESIVE
THERMISTOR