Stelrad Group Boiler CX.240

Verify the pilot flame conditions

Adjust the flame using the adjuster screw

Turn OFF the gas supply at the inlet gas cock

Switch OFF and DISCONNECT the electricity supply

Remove Controls Box Front Panel

Remove controls box front panel as described in L.E.D. lights assembly

Store the front panel in a suitable place

Unplug wires from overheat thermostat

Unplug the lead from printed circuit board No. 2

Turn OFF the gas supply at the inlet gas cock

Switch OFF and DISCONNECT the electricity supply

Remove the two screws and washers securing the control box to the side panels

Lift the control box off the locating hooks

Unfasten the two screws securing the plug-in electrical connectors to the rear of the control box

Check that the main burner responds correctly to the manual ON/OFF operations of any controls fitted in the gas control circuit.

Flame Failure Safety Device Operation

Extinguish the main burner and pilot burner by turning off the main gas inlet cock (Fig. 12) (C).

Was the thermocouple operated solenoid valve heard to close during the waiting period?

Turn OFF the gas supply at the inlet gas cock

Switch OFF and DISCONNECT the electricity supply

Remove left and right hand burners

Disconnect the pilot pipe and thermocouple connections at the gas valve

Pull off the igniter lead at the igniter