47
Bentone BG550/650
General
Cause
Remedy
No electrical connection through the air pressure switch
Test the adjustment and the function of the
air pres-sure switch.
The starting load is not correctly adjusted
Reduce or increase the gas supply, reduce
the quanti ty of air.
Gas relay defective
Replace
Air pressure switch incorrectly adjusted or defective
Check the adjustment and readjust.
No reponse as the cams of the servomotor are not correctly
adjusted or out of position.
The burner locks out after the safety time has el-apsed in
spite of flame establishment
No ionisation current or the UV-cell in wrong position
Adjust the ionisation electrode and the UV-
cell, examine cables and connections.
The supervision part of the gas relay is defective
Replace the relay
Voltage lower than 185 V
Contact the electricity authorities.
The ignition electrodes are disturbing the ionisation current
Adjust the ignition electrodes, repole the
ignition transformer if necessary.
Bad earthing
Arrange for proper earthing.
Phase and neutral transposed
See wiring diagram and change.
The burner locks out during pre-purge
Air pressure switch defective or incorrectly adjusted
Reduce or increase the gas supply. Reduce
the quantity of air.
The starting load is not correctly adjusted
Reduce or increase the gas supply. Reduce
the quantity of air.
The gas pressure is too low
Increase the pressure. Contact the gas
supply company if necessary.
Pulsations at start
The ignition electrodes are wrongly adjusted
Readjust
The gas pressure is too high
Check and adjust by means of a pressure
gauge and a pressure adjustment valve.
The lue gas side is blocked
Check the chimney lue.
Pulsations during operation
The burner is not correctly adjusted
Readjust
The burner is dirty
Clean the burner.
Defective chimney
Check and change the dimensions if
necessary.
