Glow-worm hxi and Gas Valve - Manual (Page 40)

40 0020008153-05
13.5 Gas Valve
For access, refer to section 13.1.
Remove the electrical plug from the gas valve, see diagram
10.3.
Refer to section 11.3 for removal of the fan, gas valve and
burner assembly.
Before removing the gas valve note its position on the fan.
Remove the three securing screws, which fix the gas valve,
plastic swirl plate to the venturi on the fan.
Remove the gas valve.
Remove the gas supply pipe from the gas valve.
When refitting the gas valve take care as it can be fitted more
than one way.
After assembly test for gas soundness and purge in accordance
with the current issue of BS6891 or in IE, the current edition of
I.S.813 "Domestic Gas Installations".
13.6 Fan
For access, refer to section 13.1.
Remove electrical plug.
Refer to section 11.3 for removal of the fan, gas valve and
burner assembly.
Remove the gas valve as described in the relevant parts of
section 13.5.
Remove the venturi plate secured with three screws and
remove the two screws securing the fan to the gas manifold, see
diagram 13.2.
Check the gasket and replace if necessary.
NOTE: The 30hxi and 38hxi fan is secured through an extension
piece with two securing screws, check and replace any seals or
gaskets if necessary.
13.7 Burner
For access, refer to section 13.1.
Refer to section 11.3 for removal of the fan, gas valve and
burner assembly.
Remove the four screws that secure the burner.
NOTE: THE BURNER WILL REQUIRE A NEW GASKET
WHEN REFITTED.
13.8 Front Insulation
For access, refer to section 13.1.
Refer to section 11.3 for removal of the fan, gas valve and
burner assembly.
Remove burner as per section 13.7.
Remove spark electrode, see section 13.2.
NOTE: THE BURNER WILL REQUIRE A NEW GASKET
WHEN REFITTED.
13.9 Rear Insulation
For access, refer to section 13.1.
Refer to section 11.3 for removal of the fan, gas valve and
burner assembly.
Remove securing screw and washer in the centre of the
insulation and withdraw insulation, see diagram 13.3.
13 Replacement of Parts
HEAT
EXCHANGER
Diagram 13.3
WASHER
Diagram 13.4
CIRCLIP
GLASS
STEEL
WASHER
FIBRE
WASHER
REAR
INSULATION
SECURING
SCREW
11412
11413
Diagram 13.2
11485
SECURING
SCREW
(2)
SECURING
SCREW (3)
GAS
MANIFOLD
FAN
VENTURI
PLATE
18hxi Illustrated