Heatilator • HEIR36, HEIR42, HEIR50 Installation Manual • 2285-980 Rev. G • 12/14
40
E. Air Shutter Setting
2285-901B
Natural Gas (NG) installations
:
As a general rule, it is acceptable to reduce the shutter
opening to adjust for vertical vent pipe sections prior to
the initial
fi
re up.
• Vertical Termination: May reduce shutter setting by 1/8 in.
• Horizontal Termination (more than 4 ft. vertical in vent
con
fi
guration: May reduce shutter setting by 1/8 in.
• Horizontal Termination (less than 4 ft vertical in vent
con
fi
guration: May reduce shutter setting by 1/16 in.
Propane (LP) installations
• It is recommended that the air shutter on propane
appliances remain at full open position.
Air Shutter Adjustment
Adjustment can be made to the air shutter with or without
the logs installed with a ¼ in. nut driver. See Figure 1.
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 pre-set at the factory for minimum vertical, maximum
horizontal vent run for this appliance: 2 ft. vertical and 7
in. horizontal).
Factory Pre-Set Air Shutter Settings
To adjust air shutter:
• Loosen the screw on the burner assembly.
• To close the air shutter, turn shutter clockwise.
• To open air shutter, turn shutter counterclockwise.
• Tighten the screw.
NOTICE:
Flames should not appear orange or stretch to
the top refractory. If sooting occurs, provide more air by
opening the air shutter.
Shutter Setting Veri
fi
cation / Flame Appearance
• After 15 minutes, the
fl
ames will be a yellow/blue mix.
The front
fl
ames may be blue at this time.
• After 30 minutes, the
fl
ames should be yellow with
some blue
fl
ames near the burner ports.
• After 1 hour, the
fl
ame will be at is maximum maturity.
Note:
Visually, a propane
fl
ame may differ from a
natural gas
fl
ame. This is due to the different chemical
compositions that make up both fuel types. In general, the
LP
fl
ames may be a little shorter and much brighter than
a natural gas
fl
ame.
Figure 1. Air Shutter Location
MODEL
NG
LP
HEIR36
5/8 in.
Full Open
HEIR42
5/8 in.
Full Open
HEIR50
5/8 in.
Full Open
