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Majestic • DBDV36IN, DBDV36IL, DBDV42IN, DBDV42IL Installation Manual • 2397-980 Rev. B • 5/16
Figure 9.1 Air Shutter
Air Shutter Settings (Factory Set to Minimum Vent Run
E. Air Shutter Setting
Air shutter settings should be adjusted by a quali
fi
ed ser-
vice technician at the time of installation. The air shutter is
set at the factory for minimum vertical vent run. Adjust air
shutter for longer vertical runs. See Figure 9.1.
• Loosen the wing nut.
• Move the wing nut to the right to open the air shutter.
• Move the wing nut to the left to close the air shutter.
• Tighten the wing nut.
NOTICE:
If sooting occurs, provide more air by opening
the air shutter.
MODEL
GAS TYPE
MIN. VENT RUN
MAX. VENT RUN
DBDV36IN
NG
1/8 in.
Full Open
DBDV36IL
PROPANE
3/8 in.
Full Open
DBDV42IN
NG
5/16 in.
Full Open
DBDV42IL
PROPANE
3/8 in.
Full Open
Note:
Adjust air shutter after
fl
ame has reached full
maturity (approximately 20-40 minutes).
AIR SHUTTER
WING NUT
Minimum and maximum shutter settings are set up to appear like Figure 4.18.
• Minimum vent run consists of enough horizontal vent pipe to exit 2 X 6 wall construction (approximately 8 inches).
• Maximum vent run consists of “H Maximum” on Figure 4.18.
Note:
All vent runs may need to be evaluated for ideal shutter settings. Shutter distances may vary due to vent run, fuel
quality, and elevation.