Air Shutter Setting - Heatilator NEVO3630I-B Installation Manual

E. Air Shutter Setting
Air shutter setting 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. It may need to be adjusted for other venting
scenarios.
• Adjust air shutter for longer vertical runs. See Figure 9.1.
Turn the thumbscrew to open or close the air shutter. It
may be necessary to use a pliers or crescent wrench
to adjust the shutter.
Note: Adjust air shutter after fl ame has reached full
maturity (approximately 20-40 minutes).
SHUTTER SPRING
Figure 9.1 Adjusting Air Shutter
Note: The air shutter is equipped with a compression
spring that helps to maintain the shutter position during
transportation. It may be necessary to relieve this spring
pressure on the thumb screw to adjust the shutter.
44
THUMBSCREW
CLOSE OPEN
Heatilator • NEVO3630I-B, NEVO4236I-B Installation Manual • 2378-980 Rev. E • 4/16