LENNOX HEARTH PRODUCTS • MONTEBELLO
®
DLX POWER VENT DV GAS FIREPLACES (MDLX40/45IN-PV) • CARE AND OPERATION INSTRUCTIONS
17
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
The following paragraphs address burner
adjustment concerns and procedures.
When lit for the first time, this appliance will emit
a slight odor for an hour or two. This is due to
the “burn-in” of internal paints and lubricants
used in the manufacturing process.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
CAUTION
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.
Electronic Appliance Inspection
To light the burner, refer to the lighting
instructions on
Page 20
. Ensure the igniter
lights the pilot. The pilot flame should engulf
the flame sensor rod as shown in
Figure 20
.
Adjustment
To adjust the flame, move the adjustment air
shutter (located on the lower venturi) back or
forward to increase or reduce the air shutter
opening, respectively. Position the air shutter to
the factory setting as shown in
Table 8
. 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.
When satisfied that the appliance operates
properly, finish the installation. Leave the wall
ON/REMOTE/OFF switch in REMOTE position
and turn the remote switch OFF.
Air Shutter
Opening
Venturi
Orifice
Gas Valve
Burner
Venturi
Model
Natural Gas
MDLX40IN-PV
1/8 in. (3.18 mm)
MDLX45IN-PV
1/8 in. (3.18 mm)
Table 8: Main Burner Factory Air
Shutter Opening Setting
WARNING
•
Air shutter adjustment
should only be performed
by a qualified professional
service technician.
•
Ensure that the front glass
door assembly is in place
and sealed After adjustment.
Burner Air Shutter Adjustment Procedure
Figure 19: Electronic Pilot
Assembly—Proper Pilot
Flame Appearance
Pilot
Nozzels
Flame
Sensor
Rod
Pilot Hood
Igniter
Rod
