39
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Operation
900301-01 04/2017
Innovative Hearth Products
Marin™ See-Through B-Vent Gas Fireplaces
BURNER ADJUSTMENTS
(QUALIFIED TECHNICIANS ONLY)
Flame Appearance and Sooting
Proper fl ame appearance is a fl ame which is
blue at the base and becomes yellowish-orange
in the body of the fl ame.
When the appliance is fi rst lit, the entire fl ame
may be blue and will gradually turn yellowish-
orange during the fi rst 15 minutes of operation.
If the fl ame remains blue, or if the fl ame 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 fl ames. 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 fl ames and lack of combustion air enter-
ing the air shutter opening. To achieve a warm
yellowish-orange fl ame with an orange body
that does not soot, the shutter opening must be
adjusted between these two extremes.
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 43 - Burner Flame Appearance
Air Shutter Adjustment Guidelines
• If there is smoke or soot present, fi rst check
the log set positioning to ensure that the
fl ames 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 fl ames that appear
blue and transparent. These weak, blue and
transparent fl ames are termed anemic.
• Propane models may exhibit fl ames 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
fl ame normalizes and the fl ames do not
appear sooty.
The following chart is provided to aid you in
achieving the correct air shutter adjustment
for your installation.
Glowing Embers (Rockwool)
