Heatilator • GDST4336I, GDFL4136I, GDCR4136I, GDCL4136I • 2129-900 Rev. F • 11/08 63
I. Air Shutter Setting
This appliance has an adjustable air shutter (which con-
trols the primary air) factory set for the minimum vertical
vent run (see Figure 12.15). If your installation has more
than the minimum required vertical vent length, adjust-
ment of the air shutter may be necessary to obtain opti-
mal fl ame appearance. This should be adjusted by a
qualifi ed installer at the time of installation.
By pushing the air shutter handle towards the pilot, you will
be closing the air shutter. To adjust loosen the wing nut.
Care should be taken when adjusting the air shutter so as
not to cause the appliance to soot. If sooting occurs the air
shutter will need to be opened by pushing the handle away
from the pilot. When fi nished tighten wing nut.
NOTICE: If sooting occurs, provide more air by opening
the air shutter.
Figure 14.4 Air Shutter
Figure 14.3 Fixed Glass Assembly
G. Fixed Glass Assembly

Removing Fixed Glass Assembly

WARNING! Risk of Asphyxiation! Handle fi xed glass
assembly with care. Inspect the gasket to ensure it is
undamaged and inspect the glass for cracks, chips or
scratches.
• DO NOT strike, slam or scratch glass.
• DO NOT operate fi replace with glass removed, cracked,
broken or scratched.
• Replace as a complete assembly.
Air Shutter Settings
H. Install Trim Kits and Surrounds
• Install optional trim kits and/or surrounds using the
instructions included with the accessory.
• Use non-combustible materials to cover the gap between
the sheet rock and the appliance (if desired).

Removing Fixed Glass Assembly

• Pull the four glass latches out of the grooves on the glass
frame top and bottom.
• Remove the glass door from the appliance.
• Multiple sides may be able to be removed based upon
model.

Replacing Fixed Glass Assembly

• Replace the glass door on the appliance.
• Pull out the four glass latches and place in the grooves
on the glass frame top and bottom.
• Make sure all sides are replaced properly.
LATCHES
B
OTH BOTTOM
AND TOP)
GLASS
ASSEMBLY
NG LP
Burner 1/8 in. Fully open
AIR SHUTTER
OPEN
CLOSED