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© GDC Group Ltd. 2012
Fig. 21
Burner Retaining Plate
Fig. 23
Spark
Electrode
Burner Flame Ports
Fig. 24
Grommet
Electrode Lead
Thermocouple wires
Gas Tap Locating
Bracket
Fig. 25
Injector
Washer
14
Mounting Lugs
Fig. 22
Tabs
Igniter
Burner Gauze
Flue Outlet Tube
Thermocouple wires
Gas Tap
Electrode Lead
Installer Guide
7.0 Changing components on
models without the Comfortstat
control
7.1
Changing Components
1. Before changing any components please read
Section 1.3 Important Information.
2. Turn off the gas supply and ensure that the
appliance is cold.
3. Remove the control knob by pulling forward,
then remove the case by easing upwards and
forwards until it is clear of its retaining lugs (Fig.
21).
4. After changing any components
re-commission the appliance
7.2
Piezo Unit
1. Pull off the spark lead at the rear of the igniter.
Electrode
Lead
2. Straighten the tabs securing the piezo unit to
the tap retaining plate and remove.
3. Fit the new piezo unit and twist the tabs
slightly to secure.
4. Replace all components in the reverse order of
dismantling.
7.3
Gas Control Tap
1. Undo the heat exchanger retaining nuts and
washers and draw the casting forwards off the
locating studs.
Insulation
2. Remove the three screws holding the burner
retaining plate to the airbox and undo the
thermocouple nut from the gas tap (Fig. 23 & 25).
3. Ease the thermocouple and electrode leads
from the rubber grommet (Fig. 24).
4. Disengage the burner from the injector and
pull the electrode lead off the spark electrode
(Fig. 23).
5. Pull off the spark electrode lead at the rear of
the igniter (Fig. 25).
6. Remove the supply pipe from the gas tap.
7. Undo the nut holding the gas tap to its
retaining bracket, and disengage the tap from the
bracket (Fig. 25).
8. Remove the injector and sealing washer. If the
washer is damaged it must be replaced.
9. On re-assembly ensure that the airbox sealing
grommet is correctly positioned and check for
gas soundness.
(Fig. 22).
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