Glow-worm Ultrapower sxi Series Installation And Servicing page 57

15.4 Ignition Lead
For access, refer to section 15.1.
Refer to diagram 13.9.
Pull the spark plug style connector off the spark electrode
and the ignition lead connected to the igniter unit,
see diagram 15.2.
15.5 Igniter Unit
For access, refer to section 15.1.
To aid access to the igniter unit, loosen the locknut at the top
of the domestic expansion vessel and slide forward out of its
bracket and put into its service position, see diagrams 13.5
and 13.6.
Remove ignition lead and electrical connections then remove
igniter unit by removing two securing screws, see diagram
15.2.
15.6 Spark Electrode
For access, refer to section 15.1.
Remove the spark plug ignition lead, earth lead and two
securing screws. Withdraw the spark electrode carefully from
the combustion chamber, see diagram 15.3.
15.7 Gas Valve
For access, refer to section 15.1.
Remove the electrical plug from the gas valve, see diagram
13.10.
Refer to section 13.6 for removal of the fan, gas valve and
burner assembly.
Before removing the gas valve from the fan note its position
and mark its orientation on the fan and gas valve bodies, this
will help when re-assembling.
Remove the two screws that secure the gas valve to the fan,
see diagram 15.4.
Remove the gas valve.
Fit new gasket when replacing.
After re-fitting check the combustion CO
necessary, see section 13 Servicing.
After assembly test for gas soundness and purge in
accordance with the current issue of BS6891or in IE, the
current edition of I.S.813 "Domestic Gas Installations".
15.8 Fan
For access, refer to section 15.1.
Refer to section 13.6 for removal of the fan, gas valve and
burner assembly.
Remove the two screws securing the fan to the gas valve.
Remove the fan.
Fit new gasket when replacing.
15 Replacement of Parts
and adjust if
2
57
GASKET
ELECTRODE
SECURING
SCREW
(2 OFF)
EARTH
LEAD
FAN
GASKET
GAS CONTROL
VALVE
SECURING
SCREWS
SPARK GAP
4mm
Diagram 15.3
Diagram 15.4