Lennox RAVELLE 30 Installation And Operation Instructions Manual page 31

Flame Color and Behavior
Your Ravelle™ 30 gas fireplace is designed for maximum heating ef-
ficiency . 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 .
Adjusting the fireplace to cause the flames to turn orange sooner may
result in poor combustion, sooting and a hazardous situation . See Figure
35 showing proper flame appearance .
When testing for proper operation - If an optional thermostat is installed
adjust it to its highest temperature setting . Visually determine that main
burner gas is burning properly: i .e ., no floating, lifting or flashback .
Adjust the primary air shutter(s) as required . Check for proper main
burner operation at both high and low flame .
Burner Flame Appearance
Soot above
Soot at
Flame Tip
Flame Tip
Dark Orange
Flame
Ports on Burner
Assembly
No Blue Flame
Center
IMPROPERLY
BURNING FLAME
Figure 35
No Soot at
Flame Tip
Semi-Transparent
Yellow Flame
Blue Flame
Center
PROPERLY
BURNING FLAME
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Air Shutter Adjustment
The Ravelle™ 30 gas fireplace has an air shutter control lever located
behind the lower door on the fireplace face and to the left of the gas
valve (see drawing below) . 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 fireplace burns . The
air shutter should only be adjusted by a qualified gas technician . The
fireplace should burn for about 15 minutes with the logs installed before
adjusting the air shutter . Moving the lever up will open the shutter and
turn the flames more transparent and blue . Moving the lever down will
close the shutter and turn the flames more orange .
CAUTION: 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 characteristics of the fireplace.
Air Shutter
Control
Lever
Figure 36
Gas Valve
31