Lennox Hearth CI1500DVF - Manual (Page 6)

NOTE: DIAGRAMS AND ILLUSTRATIONS ARE NOT TO SCALE.
6
BURNER ADJUSTMENTS
The following paragraphs address burner
adjustment concerns and procedures.
Flame Appearance and Sooting:
Generally most people prefer the warm glow of
a yellow to orange fl ame. Appliances operated
with air shutter openings that are too large will
exhibit fl ames that are blue and transparent.
These weak, blue and transparent fl ames are
termed anemic. If the air shutter opening is too
small sooting may develop.
Open both Latches as shown.
Figure 4
3. Reach un der the bottom front of the front
glass enclosure and pull it forward as
shown in Figure 5.
Figure 5
4. Lift glass assembly up and out and carefully
set aside in a safe place (see Figure 6).
Figure 6
Sooting is indicated by black puffs developing
at the tips of very long orange fl ames. 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 fl ames and a lack of combustion air enter-
ing the air shutter opening. To achieve a warm
yellow to orange fl ame with an orange body
that does not soot, the shutter 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 fl ames impinge on any of them.
If the logs are properly positioned and soot-
ing 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 shutter to be
opened further.
Burner Flame Appearance
Figure 7
WARNING
Air shutter adjustment should
only be performed by a qualifi ed
professional service techni-
cian.
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 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
Figure 8
Ref. Air shutter Patent:
U.S. Pat. 5,553,603
WARNING
Ensure that the front glass panel
is in place and sealed during
adjustment.
ADJUSTMENT
WARNING
The adjustment rod and nearby
appliance surfaces are hot. Exer-
cise caution to avoid injury while
adjusting fl ame appearance.
Refer to Table 5
To install the front glass enclosure panel,
proceed as follows:
1. Retrieve the glass door frame. Visually
inspect the gasket on the backside of the
panel. The gasket surface must be clean,
free of irregularities and seated fi rmly.
2. With the stove top off, position the glass
front enclosure panel into the front open-
ing with the gasket facing the relief door
(see Figure 6). Let the bottom of the door
frame gently slide down, then hook the top
fl ange of the glass frame over the top of the
fi rebox frame.
3. Fasten the two latches located beneath the
fi rebox bottom to the glass frame vee-fl ange.
Close both the latches securely.
4. Reinstall the cast iron stove top (read "Cau-
tion," on Page 5).
5. Reinstall Trivet.