Glow-worm Xtrafast 96-120 - Manual (Page 24)

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16 Routine Cleaning and Inspection
16.8 Burner, refer to diagram 16.4.
• Undo main gas supply nut from under the sealed chamber.
Note: The washer between main burner and main burner gas
supply must be kept for use on reassembly.
• Pull off ignition leads from gas control valve.
• Slacken but do not remove, two burner support screws at rear
of burner chamber using a long blade screw driver.
• Ease burner from boiler by lifting up from key hole slots,
threading the gas supply and ignition leads through the grommets
and pulling forwards, (taking care not to damage the insulation).
Before you completly remove the burner pull off flame sense
lead from flame sense electrode.
• Clean burner by washing in soapy water. Dry thoroughly
before refitting.
• When refitting burner ensure that the burner locates and seals
correctly through the grommets.
Note: To gain access to injectors for removal, refer to Section,
19.24 in Replacement of Parts.
9663
Diagram 16.4
9661
9667
MAIN GAS
SUPPLY NUT
GROMMETS
BURNER
SECURING
SCREWS
FLAME SENSE
ELECTRODE
IGNITION
LEADS
9344
16.9 Heat exchanger, refer to diagram 16.5.
• Disconnect electrical leads from fan.
• Unscrew and remove two fan retaining screws from the right
hand side edge of fan mounting plate.
• Remove fan with mounting plate attached by pulling forward
and out of boiler.
• Remove air pressure switch sensing tube from sensing probe
on flue hood.
• Remove screws securing flue hood to rear panel
• Lift flue hood clear of heat exchanger and examine for debris.
• Using a soft brush or vacuum clean as required.
DO NOT USE ANY TOOL LIKELY TO DAMAGE PAINTED
FINISH OF HEAT EXCHANGER.
Note: When re-fitting fan, make sure that the two lugs on the fan
mounting plate engage in the flue hood
9670
Diagram 16.5
9660
9665
FAN RETAINING SLOTS
9662 9664
IGNITION
ELECTRODE
ASSEMBLY