LG B-VENT GAS GC3 - Manual (Page 12)

1
p
ropane
(lp)
and
n
atural
g
as
s
upplies
Your Firestar™ gas insert is equipped from the factory for
use with natural gas only as specified on the Safety / Listing
label attached to the appliance. This appliance can only be
operated using propane gas (LP) if a certified fuel conver-
sion kit provided by Lennox Hearth Products is installed by
a qualified service technician.
Also check the orifice size on the label attached to your control
panel. It must be the correct size for the fuel and altitude.
Do not run propane tank dry. Running the tank dry may
cause a hazardous condition due to pressure drop in
empty tank.
Solid fuel is NOT to be used with this unit.
a
ir
s
hutter
a
djustment
The main burner has an adjustable air shutter located at
the end of the burner as it inserts over the orifice. It is
located behind the right side door and beneath the control
valve. The shutter adjustment has been set at the factory
to ensure proper, safe combustion and flame pattern. Only
a qualified gas technician should adjust the air shutter as
an incorrect adjustment could cause a hazardous condition.
Closing the air shutter will cause the flames to take on a
yellow color. Closing it too far will cause improper burning
and the flames will turn orange and sooty. Opening the air
shutter will cause the flames to burn cleaner; becoming
transparent and bluish.
Caution: The air shutter should never be closed to such
an extent to create sooting on the viewing glass, logs or
heat exchanger. If soot begins to form after burning, the
air shutter should be opened gradually until the sooting
condition stops. Open the shutter a small amount at a time
until the sooting ceases. See “Flame Color and Behavior”
and “Maintenance”, proper pilot flame.
1. Remove glass door (see Glass Door Removal on page
17). Carefully remove the log set and set aside.
2. Using a 5/32” allen wrench, remove the allen-head screw
on the left side of the air control panel as shown in Figure
15a, then lift out air control panel as shown in Figure
15b.
3. Using a 5/32” allen wrench, remove the screw which
secures burner tube assembly as shown in Figure 15c.
Then lift out burner tube assembly as shown in Figure
15d.
4. Using a phillips screwdriver, loosen the air shutter setscrew
just enough so air shutter can be rotated by hand (read
note below). See Figures 15e and 15f.
5. Reinstall components by reversing steps 1 - 4.
6. Locate the air shutter, behind the right side access door
(below valve), then adjust the air shutter gap until the
proper flame characteristics are achieved.
Note: The setscrew for the air shutter is secured tightly
from the factory so that it does not rotate from the factory
setting during shipping. Once you loosen the setscrew just
enough so that it can be rotated by hand, then reinstall the
burner tube, you will be able to access and adjust the air
shutter from behind the right side panel (below valve).
Air Control Panel
Figure 15a
Figure 15b
Figure 15c
Figure 15d
Figure 15e Figure 15e
Remove Allen-Head Screw
Firebox
Lift Out Air Control Panel
Remove Allen-Head Screw
Burner Tube Assembly
Lift Out Burner Tube Assembly
Setscrew
Air Shutter
Air Shutter