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ICFDV40 Fireplace Insert
AIR SHUTTER ADJUSTMENT (NATURAL GAS ONLY)
ADJUSTING THE AIR SHUTTER
The venturi under the burner is equipped with an air shut-
ter. The opening of the venturi has been set at 3/16" for
Natural Gas and fully open for Propane installation at sea
level. The burner on Natural Gas models may be adjusted
for high altitude as follows:
To access the air shutter, remove three (3) screws secur-
ing burner to engine base and slide burner to the left or
remove from
fi
rebox.
Burner
Pilot Assembly
Venturi
Air Shutter
Adjustment
Screw
FP3000
Figure 51 -
Air Shutter Adjustment
•
To increase air mixture, loosen the screw to open the
shutter more. This will reduce soot formation.
Figure
51
•
To decrease air mixture, loosen the screw to close
the shutter. Flames will be more yellow.
Figure 51