Air Shutter Setting - Heatilator HEIR36H-IFT Installation Manual

E. Air Shutter Setting

Air Shutter Setting

Air shutter settings should be adjusted by a qualified 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
MODEL
HEIR36H-IFT
HEIR36T-IFT
HEIR42H-IFT
HEIR42T-IFT
HEIR50H-IFT
HEIR50T-IFT
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 fire up.
• Vertical Termination: May reduce shutter setting by 1/8 in.
• Horizontal Termination (more than 4 ft. vertical in vent
configuration): May reduce shutter setting by 1/8 in.
• Horizontal Termination (less than 4 ft vertical in vent
configuration): 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.
44 Heatilator • HEIR36-IFT, HEIR42-IFT, HEIR50-IFT Installation Manual • 2458-980 Rev. B • 8/17
NG LP
5/8 in. Full Open
5/8 in. Full Open
5/8 in. Full Open
Figure 1. Air Shutter Location
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 Verification / Flame Appearance
• After 15 minutes, the flames will be a yellow/blue mix.
The front flames may be blue at this time.
• After 30 minutes, the flames should be yellow with
some blue flames near the burner ports.
• After 1 hour, the flame will be at its maximum maturity.
Note: Visually, a propane flame may differ from a
natural gas flame. This is due to the different chemical
compositions that make up both fuel types. In general, the
LP flames may be a little shorter and much brighter than
a natural gas flame.