Lennox Hearth ADAGIO-EN - Manual (Page 29)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
29
Step 10. BURNER ADJUSTMENTS
Flame Appearance and sooting
Proper flame appearance is a flame which is
blue at the base and becomes yellowish-orange
in the body of the flame. When the appliance
is first lit, the entire flame may be blue and will
gradually turn yellowish-orange during the first
15 minutes of operation. After 15 minutes of
operation, if the flame is blue, or if the flame is
orange with evidence of sooting (black tip), the
air shutter opening may need to be adjusted.
If the air shutter opening is closed too far,
sooting may develop. Sooting is indicated
by black puffs developing at the tips of very
long orange flames. Sooting results 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 lack of combustion air entering
the air shutter opening. To achieve a warm yel-
lowish-orange flame with an orange body that
does not soot, the shutter opening must be
adjusted between these two extremes.
Air Shutter Adjustment Guidelines
• If there is smoke or soot present, first check
the log set positioning to ensure that the
flames are not impinging on any of the logs.
If the log set is properly positioned and a
sooting condition still exists, then the air
shutter opening should be increased.
• The more offsets in the vent system, the larger
the air shutter opening will need to be.
• An appliance operated with the air shutter
opened too far, may have flames that appear
blue and transparent. These weak, blue and
transparent flames are termed anemic.
• Propane models may exhibit flames which
candle or appear stringy. If this is present
and persists, adjust the air shutter to a more
closed position, then operate the appliance
for a few more minutes to ensure that the
flame normalizes and the flames do not
appear sooty.
The following chart is provided to aid you in
achieving the correct air shutter adjustment
for your installation.
The adjustment rod and associated adjustable
air shutter is patented technology. Flame ad-
justments can be made quickly and accurately
to taste without the need of disassembling the
appliance and waiting for 30 minutes after each
adjustment.
When satisfied that the appliance operates
properly, proceed to finish the installation.
Leave the control knob in the ON position and
the burner ON/OFF switch (or optional remote
switch) in the OFF position. Close the lower
control compartment panel.
Note: See Figure 53 for proper burner flame
appearance.
Air Shutter Adjustment Guidelines :
Amount of
Primary Air
Flame
Color
Air Shutter
Adjustment
If air shutter is
closed too far
Flame will
be orange
Air shutter
gap should be
increased
If air shutter is
open too far
Flame will
be blue
Air shutter
gap should be
decreased
Figure 52 - Burner Air Shutter
Adjustment
All the way up = CLOSED
All the way down = OPEN
Adjust the rod to the full closed position for
both Natural Gas and Propane. Light the fire-
place, then adjust accordingly after heat-up.
Valve
Front of Burner
Air Shutter
Adjustment
Rod
Reach around the
left side of the
valve to locate
adjustment rod
To adjust the flame, move the lever arm up or
down (located in the lower control area as shown
in Figure 52). When the arm is positioned all
the way down it is fully open. When the arm is
positioned all the way up, it is closed.
Ensure that the air shutter is closed (push lever
all the way up).
CAUTION: DO NOT BEND THE AIR SHUTTER
ROD. MAKE SURE THE AIR SHUTTER MOVES
WHEN THE LEVER ARM IS OPERATED.
Observe the flame continuously. If it appears
weak or sooty as previously described, adjust
the air shutter up or down until the flame ap-
pearance is as desired.
WARNINGS
• Air shutter adjustment should
only be performed by a quali-
fied professional service tech-
nician.
• Ensure front glass panel are
in place and sealed during
adjustment.
CAUTIONS
• Soot will be produced if the
air shutter is closed too much.
Any damage due to carboning
resulting from improperly
setting the air shutter is not
covered under the warranty.
• The air shutter door and nearby
appliance surfaces are hot.
Exercise caution to avoid
injury while adjusting flame
appearance.
Burner Air Shutter Adjustment Procedure