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85-03-01108
FV46
Page
72
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 1/8" open for natural gas and 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 after the unit has
warmed up, approximately 30 minutes. Very
small changes in shutter settings make major
changes in flame appearance.
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 OPEN and to the “right” to CLOSE
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.
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 4-19 Burner Air Shutter Controls
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