21
Outdoor Lifestyles by Hearth & Home Technologies • Installation Manual TWILIGHT-II-MOD • 2290-970 Rev. F • 11/13
D. High Altitude Installations
NOTICE:
If the heating value of the gas has been reduced,
these rules do not apply. Check with your local gas utility
or authorities having jurisdiction.
When installing above 2000 feet elevation:
• In the USA: Reduce burner ori
fi
ce 4% for each 1000 feet
above 2000 feet.
• In CANADA: Reduce burner ori
fi
ce 10% for elevations
between 2000 feet and 4500 feet. Above 4500 feet,
consult local gas utility.
E. Air Shutter Setting
Air shutter settings should be adjusted by a quali
fi
ed ser-
vice technician at the time of installation. The air shutter
is set at the factory.
NOTICE:
If sooting occurs, provide more air by opening
the air shutter.
Air Shutter Settings
NG
LP
TWILIGHT-II-MOD
3/16 in.
Full Open