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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX CRESTLINE™ SERIES B-VENT GAS FIREPLACES • 36"/42" LSBV MODELS • CARE AND OPERATION INSTRUCTIONS
The appliance is equipped with an outside
(make-up air) vent system that is designed to
provide the appliance with outside make-up air
for combustion when in operation. The shut-
off lever for the outside air system is standard
on all appliances but should not be operated
if the complete system is not installed. Refer
to Figure 5. Outside air kits are not required
in all municipalities and may not be installed
or active with your appliance.
If you have reason to believe that you do
not have a complete outside air system, con-
tact your distributor to have your appliance
inspected for the presence of the complete
system. DO NOT assume that you have this
system in place.
The hand operated shut-off lever is located in
the right side of the replace opening behind
the screen. To open, lift and pull all the way.
The outside air damper should be open when
the replace is in use and completely closed
when the replace is not being used. This
will prevent outside cold air from entering
the dwelling.
Burner Adjustments
Flame Appearance and Sooting
Proper flame appearance is a matter of taste.
Generally most people prefer the warm glow of
a yellow to orange flame. Appliances operated
with air shutter openings that are too large, or
with long vertical vent runs, will exhibit ames
that are blue and transparent. These weak, blue
and transparent flames are termed anemic.
If the air shutter opening is too small 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
logs, appliance inside surfaces and on exterior
surfaces adjacent to the vent termination. Soot-
ing is caused by incomplete combustion in the
flames and a lack of combustion air entering
the air shutter opening.
To achieve a warm yellow to orange flame with
an orange body that does not soot, the shutter
opening must be adjusted between these two
extremes.
No smoke or soot should be present. Reposition
the log set if the flames impinge on any of them.
If sooting conditions exist, the air shutter
opening on the main burner can be adjusted.
Normally, the more offsets in the vent system,
the greater the need for the air shutter to be
opened further.
MANUALLY-RESET BLOCKED FLUE SAFETY
SWITCH
This appliance is equipped with a manually-
reset blocked flue safety switch. Refer to
Figure 6 for its location. If during appliance
operation, the ame goes off (independently of
the burner on/off wall switch), it may be due to
the operation of this safety limit switch. First
allow the appliance to cool, then reset the
safety switch by pushing the red reset button.
This reset button is located on the back of the
limit switch, between the wire terminals (see
Detail A of Figure 6 ).
The appliance should then relight and remain
lit. If this does not occur, turn off the appli-
ance and call a qualified service technician.
Maintenance
The appliance and venting system should be
thoroughly inspected before initial use and at
least annually by a qualied service technician.
Proper maintenance and use will require more
frequent, less extensive inspections and servic-
ing by the homeowner.
Generally, annual inspections should be per-
formed by a qualied service technician. More
frequent periodic inspections and cleanings
should be performed by the homeowner. Any
discrepancies discovered by the homeowner
should result in a call to a qualied service
technician to effect the repair or correction.
Refer to the maintenance schedule for main-
tenance tasks, procedures, periodicity and by
whom they should be performed.
IMPORTANT: TURN OFF GAS AND ANY
ELECTRICAL POWER BEFORE SERVICING
THE APPLIANCE.
WARNING: DO NOT OPERATE THE
SHUTOFF LEVER UNLESS A COMPLETE
OUTSIDE AIR VENT SYSTEM HAS BEEN
INSTALLED WITH YOUR APPLIANCE.
WARNING: AIR SHUTTER ADJUSTMENT
SHOULD ONLY BE PERFORMED BY A
QUALIFIED PROFESSIONAL SERVICE
TECHNICIAN.
Detail A
Manual Reset
Limit Switch
Lintel
Extension
Right Side
Refractory Panel
Reset
Button
Wire
Terminals
Figure 6