SERVICING INSTRUCTIONS
REPLACING PARTS
4.8Replace with a new pilot assembly and check the spark gap, Diagram 10.
10
AR0097
4.9After reassembly, check for gas soundness and carry out a flame failure functional check as detailed in the flow chart, especially the mag drop out time.
5.gas valve
5.1Disconnect the 2x8mm and 1x4mm gas pipe fittings at the back of the gas valve and also disconnect the thermocouple, Diagram 11 arrows B and E.
11
B
E
AR1371
5.2Disconnect the injector nut, Diagram 12 arrow D.
12
D
AR1371
5.3Undo the two bolts securing the gas valve to the fire and remove the valve.
5.4Replace in reverse order.
5.5Check all joints for gas leaks, check operation of the thermocouple and ignition lead.
6.mag unit
6.1Remove the fire, refer to section 1.
6.2Undo the thermocouple nut. Diagram 13 arrow B.
13
B
AR1371
6.3Undo the mag unit retaining nut at the back of the control valve behind the thermocouple nut.
6.4After removing the retaining nut, the mag unit can be tapped out and a replacement fitted.
6.5Replace the mag unit retaining nut and tighten. Note - this is a
6.6Replace the thermocouple and check for gas leaks.
6.7After reassembly, carry out the flame failure functional check as detailed in the flow chart, especially the mag unit drop out time.
7.main injector
7.1Undo the injector compression nut and valve nut , Diagram 14 arrows D and E, pull the pipe clear of the injector body.
14
D
E | AR1371 |
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