Installation
900077-00, 01/2018
Innovative Hearth Products
DRL6500 Linear Direct-Vent Gas Fireplaces
41
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
CAUTION
• Soot will be produced if the air shutter is closed too much. Any damage due to sooting,
resulting from improperly setting the air shutter, is not covered under the warranty.
• The air shutter rod and nearby appliance surfaces are hot. Exercise caution to avoid injury
while adjusting flame appearance.
Flame Appearance and Sooting
The flame should be blue at the base, and yellow-orange in the body of the flame.
When the fireplace is first lit, the entire flame may be blue and will gradually turn yellow-orange during the first 30
minutes of operation. If the flame remains 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 fireplace 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-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 ensure that the flames are not impinging on any of the panels. If the
panels are properly positioned and a sooting condition still exists, increase the air shutter opening.
• The more offsets in the vent system, the wider the air shutter will need to be opened.
• The length and configuration of the chimney vent will affect flame appearance.
• A fireplace 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 that candle or appear stringy. If this condition is present and persists, adjust
the air shutter to a more open position, then operate the fireplace for a few more minutes to ensure that the
flame normalizes and the flames do not appear sooty. The following chart is provided to help achieve the correct
air shutter adjustment for your installation.
Table 25 - Air Shutter Adjustment Guidelines
Figure 36 - Air Shutter Adjustment
Amount of Primary
Air
Flame Color
Air Shutter Adjustment
Air shutter adjustment lever
(below glass door)
If air shutter is
closed too far
Flame will
be orange
Air shutter gap should be increased:
PULL lever toward front of fireplace
If air shutter is
open too far
Flame will
be blue
Air shutter gap should be decreased:
PUSH lever toward back of fireplace
1.
Move the adjustment lever (
Figure 36
) down to decrease air flow and up to increase it. Position the air shutter to
the factory setting (
Table 26
).
2.
Light the fireplace. Follow the lighting procedure on the lighting label in the control compartment or
Page 67
.
3.
Allow the burner to operate for at least thirty (30) minutes while observing the flame continuously to ensure that
the proper flame appearance is achieved (
Figure 37
). If the following conditions are present, adjust accordingly.
• If flame appears weak or sooty, adjust the air shutter, incrementally, to a more open position until the proper
flame appearance is achieved.
• If flame remains blue, adjust the air shutter, incrementally, to a more closed position until the proper flame
appearance is achieved.
4.
When satisfied that the burner flame appearance is normal, proceed to finish the installation.
