High Altitude Installations; Air Shutter Setting - Heat & Glo PRIMO60 Installation Manual

E. 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 orifi ce 4% for each 1000 feet
above 2000 feet.
• In CANADA: Reduce burner orifi ce 10% for elevations
between 2000 feet and 4500 feet. Above 4500 feet,
consult local gas utility.
Figure 9.9 Air Shutter Location
Heat & Glo • PRIMO48, PRIMO48ST, PRIMO60, PRIMO60ST, PRIMO72, PRIMO72ST Installation Manual • 2310-970 Rev. L • 2/16
The PRIMO is equipped with an
internal air shutter.
DETAIL
F. Air Shutter Setting
Air shutter settings may be adjusted by a qualifi ed installer
at the time of installation. The air shutter is set at the fac-
tory for optimal fl ame appearance. The factory air shutter
setting is recommended for all vent runs. See Figure 9.9.
• Refer to Gas Service Access instructions in Section 9.C
to access the air shutter.
• Loosen the 1/4 in. screw.
• Twist shutter to adjust.
• The factory setting is recommended for all vent runs.
• Do not close the air shutter more than 1/16 in. for NG or
3/8 in. for propane.
• Tighten the screw.
NOTICE: If sooting occurs, provide more air by opening
the air shutter.
Air Shutter Settings
PRIMO48
PRIMO48ST
PRIMO60
PRIMO60ST
PRIMO72
PRIMO72ST
NG Propane
1/16 in. 3/8 in.
1/8 in. Full Open
1/8 in. N/A
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