Air Shutter Setting - Heatilator CD4236-MOD Installation Manual

E. Air Shutter Setting
Air shutter settings should be adjusted by a qualifi 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 air handle to the left to open the air shutter.
• Move the air handle to the right to close the air shutter.
• Tighten the wing nut.
NOTICE: If sooting occurs, provide more air by opening
the air shutter.
Appearance of
components may vary.
Figure 9.1 Air Shutter
Air Shutter Settings
CD4236-MOD Fully Closed
CD4842-MOD
36 Heatilator • CD4236-MOD, CD4842-MOD Installation Manual • 2241-901 Rev. C • 6/15
AIR SHUTTER
WING NUT
NG LP
Fully Open
Fully Open Fully Open