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126454-01B
23
BURNER FLAME ADJUSTMENT
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.
Burner flame adjustment (shutter opening) has
been factory preset (for natural gas) to proper
air-to-gas ratio. This ratio results in an even, clean
burning flame across burner (see Figure 39).
If adjustment is necessary, you can restore
proper flame setting by loosening air shutter
screw and rotating air shutter until proper
setting is achieved (see Figure 40). Correct
shutter openings are: 3/16'' for natural gas
and fully open for propane/lp gas.
Model
Tube
Burner
Pan
Burner
CD42MCN-LS
0.188"
0.188"
CD42MCP-LS
0.313"
0.500"
Figure 39 - Burner Flame Patterns
CORRECT
INCORRECT
CLOSE
SHUTTER
INCORRECT
OPEN
SHUTTER
Short, Sharp, Blowing Flame
Long, Blue Flame with Yellow Tips
Long, Uneven, Yellow Flame
Figure 40 - 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
f i r e - p a r t s . c o m