Glow-worm Micron 50FF - Manual (Page 21)

21 2000225227C
CONTROLS COVER
7166
Diagram 9.1
9 Fault Finding
Diagram 8.7
7229
9.1 Electrical
IMPORTANT: On completion of the Service/Fault Finding task
which has required the breaking and remaking of the electrical
connections the earth continuity, polarity, short circuit and
resistance to earth checks must be repeated using a suitable
multimeter.
Refer to: Boiler Fault Finding, see diagram 9.2, Fault Finding
Wiring Diagram, see diagram 9.3, Pictorial Wiring Diagram, see
diagram 9.4.
9.2 Electrical Supply Failure
Failure of the electrical supply will cause the burner to go out.
Operation will normally resume on the restoration of the electrical
supply.
If the burner does not relight after an electrical supply failure
open the control cover, see diagram 9.1 and if the reset neon is
lit, turn control knob on the front of the control box to “0”, and
then back again, see diagram 9.1.
If the safety temperature limiter operates at any other time, do
as above, the burner should relight. If the fault persists refer to
fault finding chart.
AIR
DEFLECTOR
WING NUT
(2)
8 Servicing
Diagram 8.5
BURNER
INJECTOR
6801
Clean the heat exchanger flueways with a suitable stiff brush.
Remove the paper together with any debris.
8.4 Injector
With the burner removed the injector can be inspected and
cleaned as necessary, see diagram 8.5.
For cleaning do not use a wire or sharp instrument on the hole.
If removed, use a little suitable sealant on the external thread
when refitting to make sure a gas tight seal is made.
8.5 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.
Refit all parts.
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).
CONTROL
KNOB
6771
Diagram 8.6
ELECTRODE
7389
SCREW
PROTECTION
SLEEVE
EARTH
3.6 + 1.1