IS 678 ECN 4993 Page 13 of 20
Thermocouple
Remove the ignition assembly as detailed above.
Undo the nut from the pilot body which secures the thermocouple to the pilot body
and pull down.
Undo the nut holding the thermocouple into the rear of the valve.
Disconnect wiring from the interrupter thermocouple block.
Replace thermocouple and reverse procedure for reassembly.
Multi Function Control Valve (M.F.C.).
Undo the two screws and remove the M.F.C. cover plate.
Disconnect the wires from the interrupter then disconnect thermocouple.
Remove the interrupter then disconnect all pipe work – pilot, gas supply and burner.
Disconnect the ignition lead from the M.F.C.
Locate the retaining screw in the lower rear of the M.F.C. undo and remove the
valve.
Remove compression fittings from old valve and fit to replacement. Fit the supplied
blanking plugs as per the old valve. Do not reuse the old blanking plugs.
Reverse the above for reassembly.
Safety Thermostat
Drain oil from tank.
Remove thermostat phial cover and securing bracket.
Remove the fascia panel. Undo gland nut at front of tank.
Carefully withdraw thermostat phial through tank – there will be resistance due to
packing behind the gland nut becoming compacted.
Undo the two screws and remove the M.F.C. cover plate.
Slide up the cover to gain access to the capillaries for ease of removal and refitting.
Disconnect wiring from thermostat.
Undo the the locknut from the thermostat body and remove.
Reverse the above for reassembly.
To Next Page
Loading...