Air Shutter Setting - Heat & Glo TRUE-36G-IFT Installation Manual

E. Air Shutter Setting
Air shutter settings should be adjusted by a quali昀椀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
MODEL
TRUE-36
TRUE-42
TRUE-50
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 昀椀re up.
• Vertical Termination: May reduce shutter setting by 1/8 in.
• Horizontal Termination (more than 4 ft. vertical in vent
con昀椀guration): May reduce shutter setting by 1/8 in.
• Horizontal Termination (less than 4 ft vertical in vent
con昀椀guration): May reduce shutter setting by 1/16 in.
Propane (P) 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.
Heat & Glo • TRUE-36-IFT, TRUE-42-IFT, TRUE-50-IFT Installation Manual • 2461-980 Rev. Y • 6/23
NG PROPANE
1/2 in. Full Open
11/16 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 Veri昀椀cation / Flame Appearance
• After 15 minutes, the 昀氀ames will be a yellow/blue mix.
The front 昀氀ames may be blue at this time.
• After 30 minutes, the 昀氀ames should be yellow with
some blue 昀氀ames near the burner ports.
• After 1 hour, the 昀氀ame will be at its maximum maturity.
Note: Visually, a propane 昀氀ame may di昀昀er from a
natural gas 昀氀ame. This is due to the di昀昀erent chemical
compositions that make up both fuel types. In general, the
propane 昀氀ames may be a little shorter and much brighter
than a natural gas 昀氀ame.
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