Stelrad Group Boiler CX.170

Turn OFF the gas supply at the inlet gas cock

Switch OFF and DISCONNECT the electricity supply

Undo the thermocouple and pilot gas pipe connections at the gas valve

Pull out the overheat thermostat connection

Undo the screw securing the grey plastic electrical cover on the valve and lift it off

Undo the earth connection and pull off the two connectors to the gas valve

Undo the overheat thermostat connection at the gas valve

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

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 the 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 push-on tags and earth connection on the overheat thermostat body, noting their position

Undo the two screws retaining the thermostat/piezo igniter bracket to the gas valve

Undo the two screws retaining the thermostat

Remove the retaining clip from the thermostat pocket

Remove the overheat thermostat phial

Turn OFF the gas supply at the inlet gas cock

Switch OFF and DISCONNECT the electricity supply

Controls Box Front Panel Removal

Undo the two screws securing the controls box front panel

Lower the panel to clear the location pegs

Pull the front panel away from the controls box