Glow-worm Hideaway 40BF - Manual (Page 19)

19 221691B
Diagram 9.1 CONTROL BOX
9 Replacement of Parts
6285
MAINS INLET
CONNECTOR
IGNITION LEAD
(BLACK END)
ELECTRICAL
CONNECTORS
THERMOCOUPLE
CONTROL BOX
COVER
GAS VALVE
SECURING
SCREW
HALF UNION
PIPE
THERMOSTAT
SECURING
SCREW (2)
THERMOSTAT
CONTROL
KNOB
SLOT
PIEZO
UNIT
BURNER
SUPPLY
PIPE
PILOT
TUBE
ELECTRICAL
CONNECTORS
GAS VALVE
SECURING
SCREW
GAS
VALVE
COVER
SECURING
SCREW
Before removing or replacing any parts, turn off the gas supply
at the gas service cock, see diagram 8.1 and isolate the
electrical supply to the appliance.
Always test for gas soundness after replacing any gas carrying
component.
9.1 Gas Valve
Follow relevant instructions in Section 8.1.
Remove control box cover by removing screw and unhooking at
the side, see diagram 9.1.
Disconnect electrical connectors, thermocouple nut and pilot
tube at the gas valve.
Remove the two screws which secure gas valve to control box.
Tilt control box to enable it to be lifted off the gas valve.
Unscrew the half union from gas valve.
Unscrew gas valve from burner supply pipe.
When screwing the pipe into the new valve use a little jointing
compound on the external thread only, to make a gas tight seal.
Replace thermostat phial as Section 8.1.
Reassemble in reverse order.
It will be necessary to purge the system of air after changing the
gas valve.
Relighting should be carried out as in Section 7.1.
9.2 Injector
When the burner has been removed from the injector manifold
as in Section 8.2 the injector can be unscrewed from the
manifold and renewed, as necessary.
When replacing use a little jointing compound on the external
thread only, to ensure a gas tight seal.
Replace in reverse order.
Replace thermostat phial as in Section 8.1.
9.3 Thermocouple
Remove the door and plinth as in Section 8.1
Disconnect thermocouple by unscrewing nuts at gas valve and
pilot burner, see diagrams 9.1 and 9.3. Release the cable clips
and the thermocouple can be withdrawn.
Reassemble in reverse order.
9.4 Pilot Burner
Follow instructions in Section 8.1 to remove cover and burner
controls assembly.
Disconnect the thermocouple nut at the pilot burner, see diagram
9.3.
Disconnect the nut retaining the pilot tube and injector in the
pilot burner.
Disconnect nut retaining electrode.
Remove the two screws and nuts securing the pilot burner and
shield to the front cover, see diagram 9.3.
Reassemble in the reverse order, checking that the spark gap
and pilot flame length are as shown in diagram 7.2.
Replace thermostat phial as in Section 8.1.
9.5 Boiler Thermostat
Follow relevant instructions in Sections 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 connectors can be
removed.
Withdraw boiler thermostat from control box complete with
capillary tube and phial attached.
Refer to diagram 9.2 when re-connecting.
Reassemble in the reverse order.
Replace thermostat phial as in Section 8.1.