Flame Appearance And Sooting; Air Shutter Adjustment - Lennox Hearth Products Shoreline 33/40 DV INS Installation And Operation Manual

Flame Appearance and Sooting

Your Shoreline™ fireplace insert is designed for maximum heating
efficiency. Therefore, upon lighting of the main burner the flames will be
semi-transparent or "bluish." After 10-20 minutes of operation the logs
will heat up and the flames will become a yellow/orange color. If after
20 minutes the flame stays lowered blue, or if the flame is orange with
evidence of sooting (black tip), the air shutter may require adjustment.
Adjusting the insert to cause the flames to turn orange sooner may result
in poor combustion, sooting, and a hazardous situation. See Figures 33
and 34 showing proper flame appearance.
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 yellow to orange flame that does not soot, the shutter opening
must be adjusted between these two extremes.
Soot at
Flame Tip
Dark Orange
Flame
Burner Assembly
No Blue Flame
Center
IMPROPERLY
BURNING FLAME
Figure 33 - Burner Flame Appearance
Figure 34 - Proper Burner Flame Appearance

Air Shutter Adjustment

The Shoreline has an air shutter control lever located below the front
door, left of the center point of the gas insert. The lever is linked to the
primary air shutter on the main burner. The air shutter regulates the
amount of primary air the burner receives and therefore how clean the
insert burns. The air shutter should only be adjusted by a qualified gas
technician. The insert should burn for about 15 minutes with the logs
installed before adjusting the air shutter. More air will result in shorter
flames and less color, less air will result in bigger flames and more color.
To adjust the air shutter, move the slide adjustment from side to side
(see Figure 35). Moving the air shutter lever to the right opens the air
shutter (more air). Moving the air shutter lever to the left closes the air
shutter (less primary air).
0
Soot above
No Soot at
Flame Tip
Flame Tip
Semi-Transparent
Ports on Pan
Yellow Flame
Blue Flame
Center
PROPERLY
BURNING FLAME
NOTE: DIAGRAMS AND ILLUSTRATIONS ARE NOT TO SCALE
CAUTIONS
• Carbon 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 control arm and nearby appli-
ance surfaces are hot. Exercise caution to avoid
injury while adjusting flame appearance.
• The air shutter should never be set so as to make
the tips of the flames sooty or create sooting on
the viewing glass, logs, or heat exchanger. If
soot begins to form after burning, the air shutter
should be opened gradually until the sooting
condition stops. Gas quality and gas pressure
may vary, which can affect the burning charac-
teristics of the insert.
Shutter Adjuster
See DETAIL A
Moving bracket to the right will open shut-
ter, to the left will close shutter.
CLOSE
Shutter Adjuster
DETAIL A
Figure 35 - Air Shutter Adjustment
OPEN