Adjustment Rod - Lennox Hearth Products CI1500DVF Care And Operation Instructions Manual

Sooting is indicated by black puffs developing at the tips of very long
orange flames. Sooting may result in black deposits forming on the logs,
appliance inside surfaces and on exterior surfaces adjacent to the vent
termination.
Sooting is caused by incomplete combustion in the flames and a lack
of combustion air entering the air shutter opening. To achieve a warm
yellow to orange flame with an orange body that does not soot, the shut-
ter opening must be adjusted between these two extremes. No smoke
or soot should be present. Reposition the logs to ensure they are in the
proper pin locations if the flames impinge on any of them.
If the logs are properly positioned and sooting conditions exist, the air
shutter opening on the main burner tube should be adjusted. Normally,
the more offsets in the vent system, the greater the need for the air shut-
ter to be opened further.
Air shutter adjustment should only be performed by
a qualified professional service technician.
Ensure that the front glass panel is in place and
sealed during adjustment.

ADJUSTMENT ROD

WARNING
The adjustment rod and nearby appliance surfaces
are hot. Exercise caution to avoid injury while
adjusting flame appearance.
Initially, always position the air shutter to the factory setting as shown
in Table 5 and Figure 8 (adjustment rod is located in the lower control
area). This can be done by moving the adjustment rod up or down
accordingly. Allow the burner to operate for at least 15 minutes.
Observe the flame continuously. If it appears weak or sooty as previ-
ously described, adjust the air shutter to a more open position until
the desired flame appearance is achieved.
The adjustment rod and associated adjustable air shutter is patented
technology. Flame adjustments can be made quickly and accurately to
taste without the need of disassembling the appliance and waiting for
30 minutes after each adjustment.
Propane models may exhibit a flame pattern that may candle or appear
stringy. If this is problematic or persists as the appliance is continually
operated, adjust the air shutter open as described in the previous para-
graphs. Operate the appliance for a period of time as the effect diminishes,
ensuring that the appliance does not develop sooty flames.
WARNING
WARNING
NOTE: DIAGRAMS AND ILLUSTRATIONS ARE NOT TO SCALE.
Burner Tube
Air Shutter
Adjustment Rod Down
(full open position)
Refer to Table 5
Figure 8 - Burner Air Shutter Adjustment
Main Burner Factory Air Shutter
Opening Setting - Inches (millimeter)
Model Natural Gas
CI1500DVF 5/16" (7.93 mm)
CI2500DVF 1/2" (12.7 mm)
Table 5
Air Shutter Adjustment Guidelines:
Amount of Flame Color
Primary Air
If air shutter is closed Flame will
too far be yellow
If air shutter is open Flame will
too far be blue
Table 6
Air Shutter Adjustment Guidelines:
If the burner flame appearance differs greatly from what is shown on
Page 10 (see Burner Flame Appearance), some adjustment from the
factory setting for the air shutter gap may be necessary (to compensate
for variables in the installation and fuel such as, BTU value / composi-
tion, gas pressure, specific gravity of gas, altitude, etc.).
Table 6 is provided to aid you in achieving the correct air shutter
adjustment for your installation.
When satisfied that the appliance operates properly, proceed to finish
the installation. Leave the control knob in the ON position and the
ON/OFF switch in the OFF position. Close the lower access door.
Adjusting Set Screw
Adjustment Rod Up
(1/8" Open Position)
Ref. Air shutter Patent:
U.S. Pat. 5,553,603
Propane Gas
5/8" (15.9 mm)
5/8" (15.9 mm)
Refer to Figure 8
Air Shutter
Adjustment
Air shutter gap should
be increased
Air shutter gap should
be decreased
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