Air Shutter Setting - Heatilator CD4236IFTR Installation Manual

E. Air Shutter Setting
Air shutter settings should be adjusted by a qualified 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 air handle to the right to open the air shutter.
• Move the air handle to the left to close the air shutter.
• Tighten the wing nut.
NOTICE: If sooting occurs, provide more air by opening
the air shutter.
Figure 9.1 Air Shutter
Air Shutter Settings
CD4236IFTR
CD4236IFTLR
CD4842IFTR
CD4842IFTLR
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Heatilator • CD4236IFTR, CD4236IFTLR, CD4842IFTR, CD4842IFTLR Installation Manual • 2511-980 Rev. M • 8/21
AIR SHUTTER WING NUT
NG Propane
1/8 in. 5/8 in.
5/16 in. Fully Open