MOUNTING OF THE BURNER
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To facilitate the mounting of the boiler
the burner head with gas lange and
pull rods can be removed from the
burner.
DO LIKE THIS:
Loosen the screw "A" on both sides
and the two stop bolts at the end of
the pull rods. Remember that the
electric cables to solenoid valve and
gas switch are also disconnected.
When the burner head and the gas
lange have been itted to the boiler
it is easy to lift the burner on to the
pull rods.
If the gas assembly needs to be in-
spected the pull rods are very use-
ful.
Loosen the screw "A" and pull out
the burner on the pull rods. Loosen
the screws "B" and withdraw the gas
assembly.
Ensure that the O-ring between the
gas assembly and the gas lange will
be in the correct position when the
gas assembly is itted again.
NOTE!
For maintenance of the brake plate,
nozzles, electrodes etc, when using
a long design of the burner tube, you
have to
remove the nozzle assembly
from the connecting pipe and move
the assembly backwards
in the fan
housing (from the boiler).
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Gas burner
FAULT LOCATION GUIDE
The basis for trouble free operation can only be ensured
by the correct combined effect of the three factors:
electricity, gas low and combustion air. Should any of
these factors change troubles may arise.
It has been proved that many troubles have rather sim-
ple causes. Before calling the serviceman the following
checks should be made:
1. Are the gas cocks of the installation open?
2. Are the fuses in order and the current switched
on?
3. Are the controls (room thermostat, boiler thermostat
etc.) correctly adjusted?
4.
Is the gas pressure to the burner suficient?
5. Is the gas relay of the burner ready for start and
not locked out?
6.
Is the air supply to the burner suficient?
To facilitate fault location we have drawn up a scheme
showing the most frequent faults in a gas burner instal-
lation and the remedies.
REMEDY
The burner does not start
No gas
Check that all gas cocks are open.
No voltage
Check fuses, thermostats and electrical connections
The burner motor fails to start
The thermal protection has locked out. Motor
defective.
The gas relay is defective
Replace
Burner motor is running but no ignition after
the prepurge time has elapsed
No voltage on the terminals
Check the contact. Replace faulty relay
The ignition electrodes in contact with each other
or with earth
Adjust
The porcelain of the electrodes is broken
Replace the electrodes
CAUSE
1(4)
