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Heatilator • ICON DV-IDV Series • 4042-575 • Rev. S • 5/11 51
M. Air Shutter Setting
Air shutter settings should be adjusted by a qualifi ed
installer at the time of installation. The air shutter is set at
the factory for minimum vertical vent run. Adjust air shut-
ter for longer vertical runs. See Figure 15.24.
• Pull the air shutter knob up to close.
• Push the air shutter knob down to open.
NOTICE: If sooting occurs, provide more air by opening
the air shutter.
Open
Closed
Figure 15.24 Air Shutter Adjustment