Glow-worm Ultimate 30FF - Manual (Page 26)

26 221518L
8 Servicing
Diagram 8.4
Diagram 8.5
Diagram 8.6
WING NUT
MAIN
BURNER
INJECTOR
PILOT
BURNER SPRING
CLIP
ELECTRODE
PILOT
INJECTOR
4141
4142
4143
Diagram 8.3
SECURING NUT AND
SHAKEPROOF
WASHER
UNION
CONNECTOR
PILOT
PIPE
ELECTRODE
AND LEAD
ASSEMBLY
6813
Remove the main burner from the main injector at the rear.
Raise the burner up and forward, easing the pilot pipe down, to
clear, take care not to damage the combustion chamber
insulation or the pilot burner assembly.
Use a vacuum cleaner or suitable stiff brush to clean the burner
thoroughly, making sure that all the burner ports are clear and
unobstructed.
NOTE: On refitting and after cleaning the heat exchanger make
sure the main burner is fitted correctly, that is, located on the
main injector and horizontal.
8.4 Main Injector
With the main burner removed the main injector can be inspected
and cleaned as necessary, see diagram 8.5.
If removing for cleaning do not use a wire or sharp instrument
on the hole.
Use a little suitable sealant on the external thread when refitting
to make sure a gas tight seal is made.
8.5 Pilot Burner/Electrode and Pilot Injector
Clean the pilot burner and electrode.
To remove the electrode release the spring clip, see diagram
8.6.
When removing and replacing the pilot injector from the pilot
burner take care not to damage the electrode, see diagram 8.6,
clean the injector by blowing through it.
Check that the spark gap is as shown in diagram 6.4.
8.6 Operational Checks
After completing a service and before fitting the case, check
condition of the case seal and renew if necessary.
Examine flue hood and terminal to make sure they are clean and
clear of obstructions.
Light the boiler and carryout the functional checks as described
in Section 6.
Testing Flue Gases: If any doubt exists that the flue products
are not exhausting correctly, investigate by use of a gas
analyser (FGA).