5056.426C8
10
TC42_NG02DN_100117-12
The air shutter on the burner tube controls the primary combustion air to the gas burner and is pre-set closed
at the factory for natural gas fuel. Some adjustment may be necessary to obtain desired flame and to elimi-
nate carbon deposits. Evaluate flame appearance after the fireplace has reached operating temperature. See
Figure 19 for proper flame pattern.
Open primary air shutter if the logs, glass, and firebox have carbon accumulation and / or the flames are long,
dark and stringy. The shutter may also be opened to enhance the Ember Material glow and lessen the flame
height.
Caution: Burner area may be hot!
Turn off the fireplace and allow the unit to cool before proceeding.
Caution: Proper air shutter
setting is a must.
The flame should be just
orange and “lazy”. It should
NEVER be set so that it cre-
ates sooting on internal parts
and glass.
Burner Flame Adjustment
To Adjust:
See Figure 20
1. Open and remove window frame and set
aside. See "Window Frame Removal" sec-
tion found in the Installation and Operating
Instructions manual.
2. Remove the log set and set aside.
3. Remove the air deflector from the log grate.
4. Loosen the screw in the Primary Air
Shutter.
5. Rotate the shutter to increase or decrease
the amount of primary air.
6. Re assemble in reverse order.
Figure 19: Example of desirable flame appearance.
PRIMARY AIR SHUTTER
(Shown factory
setting 1/8” open)
Figure 20: Primary air shutter setting.
