Bentone BG 550 LN, Installation And Maintenance Instruction

Page: 47 / 52

47
170 091 16 15-01
3(3)
Cause Remedy
The burner is operating correctly but locking out now and
then
The ionisation current is too low Check. Must be at least 4 µ A according to
the relay manufacturer but should be 8-20 µ A.
The UV-cell is in a wrong position Adjust
Voltage drop at certain times Must not drop more than 15% of the rated
current. Contact the electricity authorities if
necessary.
Air pressure switch defective or incorrectly adjusted
Spark-over in ignition electrodes
Replace the electrodes
The ambient temperature of the gas relay is too high Heat insulate, max. 60° C.
The ignition spark is too weak Check the transformern
Bad combustion
Bad draught conditions Check the chimney
The fl ue gas temperature is too high The boiler is overloaded. Reduce the
quantity of gas.
The CO2-content is too low Check the boiler with regard to leaks. Choke
the draught if it is too high.
The CO-content is too high
Excess air when using natural gas and gasoil (propane, butane) Choke the air.
Air shortage Open the air supply. Check the fl ue gas
damper.
The holes in the gas nozzle are clogged Clean
The fresh air intake is too small Check and enlarge.
The fl ame is not burning straight because the burner head is out of
position Check the burner head and readjust.
Condensation in boiler and chimney
The fl ow gas temperature is too low or the quantity of gas is not
suffi cient Increase the fl ue gas temperature by
increasing the gas supply. Insulate the
chimney