24
Servicing Instructions - Replacing Parts
6d Thermocouple
6.6 Undo the retaining nut and withdraw the thermocouple. Undo
the thermocouple from the back of the gas valve, see
Diagram 14. Reassemble in reverse order. Do not
overtighten.
14
6e Gasket
6.7 Disconnect all the above components and withdraw the
gasket. If it is damaged, replace with a new item. Always
replace the gasket first when reassembling the pilot
components.
7. Ignition Lead
7.1 Follow the Pilot Unit instruction to access the back of the
pilot assembly.
7.2 Disconnect the ignition lead from the electrode.
7.3 Remove the front cover from the control valve by removing
the retaining screw, Diagram 15 and gently levering clear
with flat bladed screwdriver, see Diagram 16.
NOTE: There is a small cylindrical metal spacer inside
the cover, this must be kept and replaced on the fixing
screw on re-assembly
15
16
7.4 Disconnect the other end of the ignition lead from the valve
body noting the route of the ignition lead.
7.5 Replace with a new ignition lead following the same route as
the old one.
Replace the valve cover and the pilot assembly.
7.6 Check operation of the new ignition lead.
8. Piezo
8.1 The piezo assembly used on this appliance is not
serviceable and is unlikely to fail.
8.2 If a new piezo is required it will be necessary to change the
valve, see Section 9.
9. Gas Valve
9.1 To remove the valve turn off the gas supply at the isolation
device.
9.2 Disconnect the 2 x 8mm and 1 x 4mm gas pipe fittings at
the back of the gas valve, see Diagram 17 (A).
9.3 Disconnect the thermocouple, see Diagram 17 (B).
C
C
B
A
D
A
17
9.4 Disconnect the ignition lead from the gas valve,
see Diagram 17 (D)
9.5 Remove the cover, see Section 7.3.
9.6 Undo the two bolts securing the gas valve to the appliance
and remove the valve, see Diagram 17 (C).
9.7 Replace in reverse order.
9.8 Check all joints for gas leaks and check operation of the
thermocouple and ignition lead.
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