Filter
Top Products
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
25
Figure 41 - Burner Flame Appearance
Figure 42 - Burner Flame Appearance
(Rustic Oak Logs Shown) LSM45-PV
(Birch Logs Shown) LSM40-PV
CAUTIONS
• Soot 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.
LENNOX HEARTH PRODUCTS • MONTEBELLO
®
POWER VENT DV GAS FIREPLACES (LSM40/45EN-PV) • INSTALLATION INSTRUCTIONS
Figure 40
Air Shutter
Opening
Venturi
Orifice
Gas Valve
Burner
Venturi
Main Burner Factory Air Shutter
Opening Setting - Inches (millimeter)
Model Natural
Gas
Propane
Gas
LSM40-PV
1/8 (3.18) 1/4 (6.35)
LSM45-PV
1/8 (3.18) 1/4 (6.35)
To adjust the ame, rotate the air shutter toward
the back or toward the front of the replace.
Position the air shutter to the factory setting as
shown in the table in Figure 40. 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 extension knob (refer to Figure 28
on Page 21), to adjust the flame height as
desired, by sliding the knob over the variable
flame adjustment knob located on the front of
the valve. Replace the extension knob back
to the hanger after the adjustment.
Units converted for use with propane gas may
exhibit a ame pattern that may candle or ap-
pear stringy. If this is problematic or persists
as the appliance is continually operated, adjust
the air shutter open 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.
Leave the control knob in the ON position and
the remote switch OFF.
Note: See Figures 41 and 42 for proper burner
flame appearance.
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.