Lennox Montebello DLX Installation Instructions Manual page 27

LENNOX HEARTH PRODUCTS • MONTEBELLO
Burner Air Shutter Adjustment Procedure
WARNING
• Air shutter adjustment should
only be performed by a quali-
fied professional service
technician.
• Ensure that the front glass
door assembly is in place and
sealed After adjustment.
CAUTION
Soot will be produced if the air
shutter is closed too much. Any
damage due to carboning result-
ing from improperly setting the
air shutter is not covered under
the warranty.
To adjust the flame, rotate the air shutter toward
the back or toward the front of the fireplace.
Position the air shutter to the factory setting as
shown in the table in Figure 48. Allow the burner
to operate for at least 15 minutes. Observe the
flame continuously. If it appears weak or sooty
as previously described, adjust the air shutter
until the flame appearance is as desired.
Use the remote to adjust the flame height
as desired.
Propane models may exhibit a flame pattern
that may candle or appear stringy. If this is
problematic or persists as the appliance is
continually operated, adjust the air shutter
closed as described in the previous paragraphs.
Operate the appliance for a period of time as the
effect diminishes, ensuring that the appliance
does not develop sooty flames. When satisfied
that the appliance operates properly, proceed
to finish the installation.
DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS
®
Main Burner Factory Air Shutter
Opening Setting—Inches (millimeter)
Model Nat.Gas Propane Gas
MDLX40 1/16 (1.59)
MDLX45 1/16 (1.59)
Figure 48
Contemporary Media Shown (MDLX40)
Figure 49: Burner Flame Appearance
Rustic Oak Logs Shown (MDLX45)
Figure 50: Burner Flame Appearance
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Air Shutter
Opening
Venturi
9/32 (7.14)
9/32 (7.14)
Burner
Venturi
Orifice
Gas
Valve
27