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Step 1. With main burner in operation slide the inner combustion chamber door open.
Step 2. To adjust for proper burning, loosen the air shutter nut, rotate the shutter to close the opening in the burner,
then slowly rotate the shutter until the yellow tips are minimized and the flame becomes blue. Tighten the air
shutter nut. Too much air will cause the flame to lift off the burner ports and create noisy burner operation.
Too little air (yellow tips) will result in soot formation.
At periodic intervals (not more then 6 months) a visual inspection should be made of the main burner for proper operation
and to insure no debris accumulating.
Main burner should light smoothly from pilot and burn with a blue flame with a minimum of yellow tips.
Steel burner models have a self adjusting air mixture and do not have an adjustable air shutter. Cast iron burner can have
the gas and air mixture properly proportioned by adjusting the air shutter on the mixer face of the main burner (see step 2
below).
Main burner must be free from any debris accumulation that may effect burner operation (see burner cleaning procedure
on page 21).
MAIN BURNER: Inspection, Adjustment, Cleaning and Replacement
CAST IRON BURNER ADJUSTMENT
SERVICE PROCEDURE AG-IV
Burner Operation Inspection, Adjustment
Cleaning and Replacement
WARNING
Inner door and burner components may be HOT when performing this operation. Take
necessary precaution to prevent personal injury.
Air Shutter
Nut
Page 20
R
Figure 37
20