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57D0016
IDV380/IDV490 Fireplace Insert
7
The venturi of the burner is equipped with an air shutter. The opening of the venturi has been
set at 1/4" 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 increase air mixture, open the shutter more. This will reduce soot formation. Figure
38
• To decrease air mixture, close the shutter. Flames will be more yellow. Figure 39
FP1940
air shutter part open
Air Shutter
FP1940
Figure 38 -
Push Adjustment Lip Up to Open Air Shutter
FP1941
air shutter fully open
Air Shutter
FP1941
Figure 39 -
Pull Adjustment Lip to Close Air Shutter