17
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MONTEBELLO
®
SEE-THROUGH DIRECT-VENT GAS FIREPLACES (LSM40ST-N / LSM40ST-P) • CARE AND OPERATION INSTRUCTIONS
Electronic Appliance Checkout
To light the burner, refer to the lighting instruc-
tions on
Page 21
. Ensure the igniter lights the
pilot. The pilot flame should engulf the flame
sensor as shown in
Figure 22
.
Burner Air Shutter Adjustment Procedure
1.
Light the appliance (follow lighting proce-
dure in Care and Operation Instructions or
on lighting label in control compartment).
2.
Allow the burner to operate for at least 30
minutes while continuously observing the
flame to ensure that the proper flame ap-
pearance has been achieved (see
Figures
20 and 21
).
3.
Adjust the air shutter using the Air Shutter
Adjustment Lever on the lower right side of
the firebox (see
Figure 20
).
•
For more OPEN air shutter, slide lever
to the RIGHT.
•
For more CLOSED air shutter, slide
lever to the LEFT.
A minimum shutter setting is designed into
the venturi by four 1/16"-inch tabs.
• If the flame appears weak or sooty (as
described on the previous page), adjust
the air shutter until proper flame appear-
ance is achieved.
• If flame stays lowered blue,
incremen-
tally
adjust the air shutter to a more
CLOSED position until proper flame
appearance is achieved.
Note:
See
Figures 20 and 21
for proper burner
flame appearance.
WARNING
HOT GLASS WILL CAUSE BURNS.
DO NOT TOUCH GLASS UNTIL COOLED.
• Fireplace surfaces get EXTREMELY HOT!
• The glass on the front of the fireplace
reaches EXTREMELY HIGH temperatures
and can cause severe burns if touched.
Even after the gas is turned off, fireplace
surfaces remain extremely hot.
CAUTION
RISK OF PERSONAL INjURY
OR PROPERTY DAMAGE.
•
Air shutter adjustment should only be
performed by a qualified professional
service technician.
•
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.
Flame
Sensor
Pilot
Nozzels
Igniter
Rod
Pilot Hood
PILOT ASSEMBLY
Proper Pilot Flame Appearance
Figure 22
f i r e - p a r t s . c o m
