Air Shutter Control And Flame Appearance - Mendota DXV35 TIMBERFIRE Installation And Operating Instructions Manual

4.6 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. Very small changes in shutter settings
make major changes in flame appearance.
The burner air shutter adjustment knob is located on the left side
of the gas valve, below the spark ignitor button. Push the knob to
close the air shutter or pull on the knob to open the air 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, i f 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 change s. NOTE: Changes
in front burner flame can be made by re -arranging the coals and front burner air shutter opening.
85-03-01115
Figure 4-14 Burner Air Shutter Controls
DXV35 TIMBERFIRE Page 66