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119212-01B
19
BUrner FLAMe
ADjUStMent
The burner flame adjustment (shutter open
-
ing).has.been.factory.preset.(for.natural.gas).
to.the.proper.air-to-gas.ratio..This.ratio.results.
in an even, clean burning flame across the
burner.(see.Figure.42).
If.adjustment.is.necessary,.you.can.restore.
the proper flame setting by loosening the air
shutter.screw.and.rotating.the.air.shutter.until.
proper. setting. is. achieved. (see. Figure. 43)..
The.correct.shutter.openings.are.as.follows:
Figure 42 - Burner Flame Patterns
CORRECT
INCORRECT
CLOSE.
SHUTTER
INCORRECT
OPEN.
SHUTTER
Short,.Sharp,.Blowing.Flame
Long,.Blue.Flame.with.Yellow.Tips
Long,.Uneven,.Yellow.Flame
Tube.Burner
Pan.Burner
Model
NG
LP
NG
LP
CD32M-B 0.188" Max.
—
—
CD36M-B 0.188"
Max
—
—
CD42M-A 0.188" 0.313" 0.188" 0.500"
WARNING: Improper installa
-
tion, adjustment, alteration, ser
-
vice or maintenance can cause
injury or property damage. Refer
to this manual for assistance.
Consult a qualified installer for
additional information.
Figure 43 - Air Shutter Adjustments
Manifold
Air.Shutter.
Opening
Firebox.
Bottom
Burner
Gas.Line
Burner.Pan
Burner.
Tube
Adjustment.Screw
Adjustment.
Screw
Manifold
Air.Shutter.
Opening
Burner
Gas.Line
Firebox.
Bottom