85-03-01103
FV41 ARCH
Page
71
4.14
AIR SHUTTER CONTROL AND FLAME APPEARANCE
During initial installation, the air shutter opening should be checked to
be certain that the shutter is set correctly at 1/16”-1/8" open for
natural gas and ¼”-1/2" minimum open for L.P. gas. NOTE: For
altitudes above 5,000’, some variations may be required.
Be sure burner and logs are properly installed. After log set has been
properly installed, adjustments to the air shutter shall be made for
final flame appearance. These small shutter adjustments can be made
by the following procedure:
NOTE: All adjustments to the air shutter setting must be
made by a qualified installer, service agency, or the gas
supplier. Very small changes in shutter settings make major
changes in flame appearance.
Two air shutters exist. The front burner air shutter adjustment lever is
located below the Glass Door Frame on the left side. Slide the lever to
the “left” to CLOSE and to the “right” to OPEN the front burner shutter.
The rear burner air shutter adjustment lever is located below the Glass
Door Frame on the right side. Slide this lever to the “right” to CLOSE
and to the “left” to OPEN the rear burner shutter.
1.
After fireplace has warmed up , if flame is too blue, close air
shutter in small 1/8" increments until flame turns desired
realistic yellow. Use glass latch tool to hook end and slide control.
2.
If flame is causing soot on viewing glass, open air shutter fully until sooting stops. Continue burning unit with air
shutter fully open for four to six hours until all internal deposited soot has burned off.
3.
Once deposited soot has disappeared, close air shutter in increments of 1/8”.
LPG Air shutter settings hint: A properly adjusted air shutter setting will yield burner flames that have an
approximate 2” high blue color base. If yellow colored flames are starting at burner level, air shutter is
closed too far and will create soot. If you observe that the flame is yellow starting very close to or at the
burner surface level, open air shutter. Also, if a log or part of a log is suspended and hanging inside a yellow
portion of the flame, soot can form easily on the part of the log that is inside the yellow flame area.
IMPORTANT: Try each new shutter setting approx. ½ hr. before making additional changes. NOTE: Changes
in front burner flame can be made by re-arranging the coals and front burner air shutter opening.
Figure 4-23 Burner Air Shutter Controls
CLOSE
FRONT BURNER
AIR SHUTTER
OPEN
OPEN
REAR BURNER
AIR SHUTTER
CLOSE
