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Heatilator • NEVO3630I-B, NEVO4236I-B Installation Manual • 2378-980 Rev. E • 4/16
44
E. Air Shutter Setting
Air shutter setting should be adjusted by a quali
fi
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).
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.
OPEN
CLOSE
THUMBSCREW
SHUTTER SPRING