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 fl ame and to eliminate carbon deposits. Evaluate fl ame appearance after the fi replace
has reached operating temperature. See Fig. #28 for proper fl ame pattern.
Open primary air if the window glass and fi rebox have carbon accumulation and/or the
fl ames are long, dark and stringy. The shutter may also be opened to lessen the fl ame
height.
NOTE:
Proper air shutter setting is required.
The fl ame should be just orange and “lazy”. It should NEVER be set to create sooting
on internal parts and window glass.
Fig #28
10
TCWS.54NG04.C 040907
Burner Flame Adjustment
