12 servicing, 2 fan removal, 3 burner removal – Glow-worm Betacom C User Manual
Page 49: 4 visually check, 5 cold water inlet filter
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12 Servicing
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Diagram 12.6
Diagram 12.7
Diagram 12.8
Diagram 12.9
12.2 Fan removal
Disconnect the electrical connections and air pressure switch
connection tubes from the fan, remove the fan securing
screw and withdraw fan from fan hood with its 56º bend, see
diagram 12.5.
12.3 Burner removal
Remove the burner assembly from the combustion chamber
as follows:
Pull off the ignition and flame electrode leads from mains
circuit board and remove the wires with grommet from the
combustion chamber base, see diagrams 12.6 and 12.7.
Remove the burner-retaining screws at the sides and remove
the burner, see diagram 12.8.
12.4 Visually check
For debris/damage and clean/replace as necessary the
following items:
Heat exchanger, Burner, Fan/compartment
Electrodes and Insulation/gaskets
IMPORTANT: Clean the heat exchanger using a soft brush or
vacuum cleaner. Do not use any tool likely to damage painted
finish of heat exchanger.
Clean the burner by washing in soapy water. Allow to dry
thoroughly before re-fitting.
Do not use wire or a sharp instrument to clean the burner
injectors.
Ensure the ignition electrode gap is set to 4 mm, see diagram
12.7.
12.5 Cold water inlet filter
The boiler is fitted with a cold water inlet filter which must be
inspected on each service, see diagram 12.9.
To access the filter:
Close the isolating valve on the boiler’s cold water domestic
inlet by turning the valve head fully clockwise.
Open one or more hot water taps to drain the domestic hot
water circuit.
Disconnect the cold water inlet connection to the boiler.
Clean and inspect the filter, replace if necessary as described
in replacement of parts section 14.19.
Re-fit the filter and reinstate the cold water inlet connection to
the boiler, fit new gasket as required.
Fully open the isolating valve on boiler’s cold water inlet and
check for leaks.
SECURING SCREW
LEFT HAND SIDE
OF BURNER
RIGHT HAND
SIDE OF BURNER
SENSING TUBE
GROMMET
BURNER
COLD WATER INLET FILTER
COLD WATER INLET
ISOLATION VALVE
IGNITION AND FLAME
ELECTRODE LEADS
SPARK GAP 4mm