Glow-worm Hideaway 40CF - Manual (Page 17)

17 221807B
9 Replacement of Parts
Diagram 9.1 CONTROL BOX
6123
MAINS INLET
CONNECTOR
(Disconnect)
THERMOSTAT
CONTROL
KNOB
PIEZO
UNIT
ELECTRICAL
CONNECTORS
SLOT
IGNITION LEAD
(BLACK END)
BURNER
SUPPLY
PIPE
THERMOCOUPLE
HOOK
CONTROL BOX
COVER
COVER
SECURING
SCREW
GAS
VALVE
GAS VALVE
SECURING SCREW
ELECTRICAL
CONNECTORS
GAS VALVE
SECURING
SCREW
Before removing or replacing any parts, turn off the gas supply
at the boiler service cock, see diagram 8.1. Isolate the electrical
supply to the boiler.
Unless stated otherwise all parts are replaced in the reverse
order to removal.
Always test for gas soundness after replacing parts.
9.1 Gas Valve
Follow the relevant instructions in Section 8.1.
Remove control box cover by removing the screw and unhooking
at the side, see diagram 9.1.
Disconnect thermocouple nut, interrupter, electrical connections
and pilot tube connection at the gas valve.
Remove the two screws which secure gas valve to the control
box.
Tilt control box to enable it to be lifted off the gas valve.
Unscrew half union pipe from gas valve.
Unscrew the gas valve from the burner supply pipe.
When screwing the pipes into the new gas valve use a little
jointing compound on the external thread only, to make a gas
tight seal.
Replace thermostat phial as relevant part of Section 8.1.
Refer to diagram 9.2 to connect electrical leads.
It will be necessary to purge the system of air after changing the
gas valve. Follow the instructions in Section 7.1.
PILOT TUBE
HALF UNION
PIPE
THERMOSTAT
SECURING
SCREW (2)
INTERRUPTER
ELECTRICAL
CONNECTIONS
9.2 Boiler Thermostat
Follow the relevant instructions in Section 8.1 and 9.1.
Pull off the thermostat control knob.
Remove the two screws which secure the boiler thermostat to
the control box, see diagram 9.1.
Tilt the thermostat so that the electrical connections can be
removed.
Withdraw boiler thermostat from control box complete with
capillary tube and phial.
Refer to diagram 9.2 to connect electrical connectors.
Replace the thermostat phial as the relevant part of Section 8.1.
9.3 Piezo Unit
Pull door forward at the top to disengage the studs and lift to
release from slots, see diagram 7.4.
Remove mains inlet connector by pulling upward, see diagram
8.1.
Remove the control box cover by removing screw and unhooking
from slot at the side, see diagram 9.1.
Disconnect the ignition lead at the piezo unit.
Remove the nut inside the control box and remove piezo unit.