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the afterburner may be used either continuously during cleaning operations in the fluidised bath or, to
reduce the overall gas consumption, during the initial part of the cleaning cycle when visible fumes are
provided.
With the electrical and gas supplies to the afterburner switched on, the burner may be initiated by
switching the power switch to the on position. the automatic start-up sequence (as described in the
General description section of this manual) will commence, and after the appropriate time delays the
main burner flame will ignite.
Should the system fail to ignite, or for some reason the burner flame be extinguished during operation,
the control system will go into lock-out state. a delay of approximately 60 seconds occurs in this state
before it is possible to recommence the start-up sequence by depressing the start button.
to stop the afterburner at any time, switch the power switch to the off position.
mAintenAnce
the following points should be checked as part of a regular maintenance routine. the period between
checks depends upon the types of materials being treated in the fluidised bath and the frequency at
which the system is used.
a.
check ignition electrode, clean and replace as necessary.
b. check the condition of the burner plates, and clean if necessary.
note: excessive deposits of fluidising medium on the burner plate are an indication of poor system
adjustment or incorrect maintenance of the cyclone.
c.
check the condition of the thermal insulation within the combustion chamber, damaged insulation
should be replaced before the outer casing of the afterburner is subjected to high temperatures.
d. check the condition of the flame probe, clean and replace as necessary.
e.
check the function of the flame control system.
fAult finding
1. Burner will not start
a.
check for electrical supply at burner control terminal 9. this will prove air pressure switch is
operational.
b.
check that the control is not in the lock-out position.
2. Burner starts but control goes to lock-out
a.
check that gas supply is turned on.
b.
check that flame sensing probe is correctly positioned and not shorting to earth.
c.
check ignition circuit is functioning correctly, ie: transformer or spark plug is not shorting to
earth.
operAtion
9
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