Glow-worm Xtramax - 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.
11762
Diagram 20.5
9347
Diagram 20.4
9346
INSULATION
PLUG
SELF ADHESIVE
THERMISTOR