Bentone STG 120/2, Installation And Maintenance Instruction

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40 Bentone
Cause of fault Action
Burner control faulty Replace
Air pressure gauge incorrectly set or faulty Check the settings and reset, or replace
No acknowledgement signal due to incorrect adjustment or
misalignment of the control motor cams. Check the settings and realign.
Burner trips after safety time limit despite flame propagation
No ionisation current or UV cell incorrectly positioned Adjust ionisation electrode and UV cell
Check cables and connectors
Burner control monitor faulty Replace burner control
Voltage lower than 185 V Contact an electrician
Ignition electrodes disrupting ionisation current Adjust ignition electrodes. Re-polarise the
transformer
Poor earth connection Ensure adequate earth connection
Phase and neutral swapped around Check wiring diagram and change
accordingly
Burner trips during pre-aeration.
Air sensor faulty or incorrectly set Increase/decrease air setting. Reduce air
volume
Ignition load incorrectly set Increase/decrease gas supply Reduce
airflow
Gas pressure too low Increase pressure. If necessary, contact gas
supplier
Pulsations at start-up
Ignition electrodes incorrectly set Adjust
Gas pressure too high Check and adjust using pressure gauge and
pressure control valve
Flue gas side blocked Check the chimney flue
Burner pulsates during operation
Burner incorrectly set Adjust
Burner dirty Clean the burner
Incorrect chimney Check and modify dimensions if necessary
Burner functioning properly but with occasional blockage
Ionisation current too low Check. Must be at least 6 µA, but should
ideally lie between 8 and 20 µA
UV cell incorrectly positioned Adjust
Voltage drop at certain times Must not drop below 15% of rated voltage.
Contact an electrician if necessary
Incorrectly set or faulty air sensor Check the settings and reset, or replace
Ignition electrode overload Replace
Burner control ambient temperature too high Insulate for heat, Max. 60 °
Ignition spark too weak Check the transformer
Poor combustion
Poor draught conditions Check the chimney