Figure 45: Desirable flame appearance.
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The air shutter on the burner tube controls the primary combustion air. It is set to the closed position
at the factory for natural gas fuel. Some adjustment may be necessary to obtain desired flame and
to eliminate carbon deposits. Evaluate flame appearance after the fireplace has reached operating
temperature. See (Figure 45) for proper flame pattern.
Open primary air if the window glass and firebox have carbon accumulation and/or the flames are
long, dark and stringy. The shutter may also be opened to lessen the flame height.
NOTE:
Proper air shutter setting is required, fully closed for natural gas and half open for propane.
The flame should be just orange and “lazy”. It should NEVER be set to create sooting on internal
parts and window glass.
Burner Flame Adjustment
