120
Bentone
Cause of fault
Action
Poor combustion:
Poor draught conditions.
Check the chimney.
Flue gas temperature too high.
Boiler overloaded Decrease the gas volume, sweep
the chimney if necessary.
CO2 content too low.
Choke the air supply. Check the boiler for any
leakages. Choke the draught if too high.
CO content too high:
Surplus air when using natural gas and liquefied
petroleum (propane, butane).
Choke the air supply.
Poor air supply.
Open the air supply. Check flue gas damper.
Holes in gas nozzle clogged.
Clean.
Poor fresh air intake.
Check and increase.
Flame at incorrect angle due to combustion head out
of position.
Check the combustion head and readjust.
Condensation build up in boiler and chimney:
Flue gas temperature too low or gas volume too low. Raise the flue gas temperature by increasing gas
volume Insulate the chimney.
Summary of Contents for STG 146i/2
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