Gradually reduce fuel flow or increase air flow while watching oxygen CO and combustibles. Typically
the following will occur. The 02 will increase. The CO will decrease and the combustibles will
decrease. Reduce fuel until minimal amount of combustibles are present. Then reduce fuel by a
small amount for a safety margin.
Note: Typically some CO and combustibles will always be present.
Variables effecting the combustion process.
Poor atomization of fuel: Atomizer contaminated with particulate. Air passages clogged.
Poor oil: Oil laden with particulate and unburnables.
Switching fuels: Light to heavy oils, LP to butane.
Stray air: Poor drum seals, larger than necessary feed openings, draft too high.
Inadequate combustion zone.
Material falling thru flame: Interrupts burning, creating high CO and high combustibles.
Overheating RAP or AC.