44
Fault Finding
5
. Delayed ignition – burner starts violently
Symptoms Possible Causes Actions
Burner pulsates on start-up Excessive combustion air Re-commission burner - adjust air setting
Low oil pressure Check and re-commission burner
Partially blocked nozzle Replace nozzle
Fuel contamination (water in tank) Check tank, filters, oil line for water
Fan slipping on shaft Check and re-tighten
Pump coupling loose or worn Check and replace
Burner starts violently Delayed ignition Check electrode settings
Check electrodes for damage
Check HT lead connections are sound
Check HT leads for damage or arcing
6. Burner cycles on and off
Symptoms Possible Causes Actions
Burner firing Restriction in oil supply Check filters, valves and oil lines and rectify
Burner stops firing Fuel contamination (water in tank) Check tank, filters, oil line for water
Pre-purge starts Partially blocked nozzle Replace nozzle
Burner fires Vitiated combustion air - BF only Disconnect snorkel tube and check operation
Burner stops firing Check flue terminal for obstructions and rectify
Check flue system for leaks and rectify
Boiler thermostat hunting Replace faulty thermostat
To Next Page
Loading...
Need help?
General
