Lennox Hearth CI2500DVF - Manual (Page 7)

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 7
ENSURE THAT THE FRONT GLASS PANEL IS IN
PLACE AND SEALED DURING ADJUSTMENT.
Adjustment
CAUTION: 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 Figure 8 (adjust-
ment 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 fl ame continuously. If it appears weak
or sooty as previously described, adjust the
air shutter to a more open position until the
desired fl ame appearance is achieved.
The adjustment rod and associated adjustable
air shutter is patented technology. Flame adjust-
ments 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 fl ame 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 paragraphs.
Operate the appliance for a period of time as the
effect diminishes, ensuring that the appliance
does not develop sooty fl ames.
Adjustment Rod Up
(1/8" Open Position)
Air Shutter
Burner Tube
Adjusting Set Screw
Adjustment Rod Down
(full open position)
Burner Air Shutter Adjustment
Air Shutter Adjustment Guidelines:
If the burner fl ame appearance differs greatly
from what is shown on page 6 (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 /
composition, gas pressure, specifi c gravity
of gas, altitude, etc.).
Table #6 is provided to aid you in achieving
the correct air shutter adjustment for your
installation.
When satisfi ed that the appliance operates
properly, proceed to fi nish the installation.
Leave the control knob in the ON position
and the ON/OFF switch in the OFF position.
Close the lower access door.
Figure 8
Main Burner Factory Air Shutter
Opening Setting - Inches (millimeter)
Model Natural
Gas
Propane
Gas
CI1500DVF
5/16"
(7.93 mm)
5/8"
(15.9 mm)
CI2500DVF
1/2"
(12.7 mm)
5/8"
(15.9 mm)
Table 5
Air Shutter Adjustment Guidelines:
Amount of
Primary Air
Flame
Color
Air Shutter
Adjustment
If air shutter is
closed too far Flame will
be yellow Air shutter
gap should be
increased
If air shutter is
open too far Flame will
be blue Air shutter
gap should be
decreased
Table 6