Technical data

INSTALLATION & SERVICING INSTRUCTIONS
a Remove combustion chamber door ( see Section 9.1.2).
b Unscrew the thermocouple and electrode nuts at the base of the pilot assembly.
c Disconnect the electrode lead and remove the electrode.
d Reassemble in reverse order (see
Section 9.1.8). Check that the electrode gap is 3-4mm (see Figure
14).
9.2.4 Replacement of Pilot Assembly and Pilot Injector)
a Remove combustion chamber door ( see
Section 9.1.2).
b Remove pilot assembly and pilot injector (see
Section 9.1.3).
c Reassemble in reverse order (see
Section 9.1.8).
Note: that if the steel pilot pipe is also being replaced, a considerable tightening torque is required to
initially clamp the steel olive onto the pipe. Care should be taken to support the pilot assembly to
prevent distortion,alternatively the initial tightening can be carried out whilst the pilot assembly is
removed and held in a vice.
Page 23
9.2.5 Replacement of Multi-Functional Gas Control Valve
a Remove combustion chamber door ( see
Section 9.1.2).
b Remove main burner and injector (see
Section 9.1.3 and 9.2.1).
c Unscrew the pilot tube nut at the rear of the gas control valve.
d Unscrew the thermocouple connection at the interrupter at the rear of the gas control valve, remove
interrupter body. The lock nut need not be removed.
e Loosen screw in the electrical plug housing in the base of the gas control valve, remove the plug by
pulling forward.
f Remove the earth wire screw from the base of the gas control valve, remove the earth wire.
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