Step 9. Burner Adjustments - Lennox Hearth Products LSS-35CN Installation Instructions Manual

Position the door in front of the firebox opening
with the bottom of the door held away from the
fireplace (Figure 46 ). Hook the top flange of the
door frame over the top of the firebox frame.
Let the bottom of the door frame swing gently
in towards the fireplace ensuring that the gas-
ket seats evenly as the door frame draws shut.
Fasten the two latches located underneath the
firebox floor to the door's vee-flange. Close
both the latches securely.
Top Flange
Door Frame
Vent Restrictor
Adjustment Rod
Latch
Bottom Vee-flange
Latch
Door Frame
Firebox Floor
INSTALLING THE GLASS DOOR
Figure 46
WARNING: HANDLE THIS GLASS WITH EX-
TREME CARE! THE GLASS PANEL IS SUS-
CEPTIBLE TO DAMAGE — DO NOT SCRATCH
WHILE HANDLING OR WHILE RE-INSTALL-
ING THE GLASS DOOR FRAME.
WARNING: DO NOT OPERATE APPLI-
ANCE WITH THE GLASS FRONT RE-
MOVED, CRACKED OR BROKEN. RE-
PLACEMENT OF THE GLASS SHOULD
BE DONE BY A LICENSED OR QUALIFIED
SERVICE PERSON.

Step 9. 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 will
exhibit flames 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 sur-
faces adjacent to the vent termination.
Sooting is caused by incomplete combustion in
the flames and 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 logs if flames impinge on any of them.
If the logs are properly positioned and sooting
conditions exist, the air shutter opening on the
Glass Door
main burner tube should be adjusted. Normally,
the more offsets in the vent system, the greater
the need for the air shutter to be opened further.
WARNING: AIR SHUTTER ADJUSTMENT
SHOULD ONLY BE PERFORMED BY A
QUALIFIED PROFESSIONAL SERVICE
TECHNICIAN.
IMPORTANT: ENSURE THAT THE FRONT
GLASS PANEL IS IN PLACE AND SEALED
DURING ADJUSTMENT.
Burner Adjustment
CAUTION: THE AIR SHUTTER ADJUST-
MENT ROD AND NEARBY APPLIANCE
SURFACES ARE HOT. EXERCISE CAU-
TION TO AVOID INJURY WHILE ADJUST-
ING FLAME APPEARANCE.
To adjust the flame, rotate the air shutter
adjustment rod toward the back or toward
the front of the fireplace (rod located in the
lower control area). Position the air shutter
to the factory setting as shown in the Table
of Figure 47 . Allow the burner to operate for
at least 15 minutes. Observe the flame con-
tinuously. If it appears weak or sooty as
previously described, adjust the air shutter
by pushing or pulling on the adjustment rod
until the flame appearance is as desired.
The air shutter adjustment rod and associated
adjustable air shutter is patented technology.
Flame adjustments can be made quickly and
accurately to taste without the need of disassem-
bling the appliance and waiting for 30 minutes
after each adjustment.
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: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Burner
Venturi
Tube
Air Shutter
Opening
Orifice
Air Shutter
Adjusting
Rod
F A C T O
S H U T E T
G s a
M o e d s l
y T e p
O P E
n i h c s e
N . t a 1 2 /
L S - S 5 3
P o r . p 5 8 /
N . t a 1 2 /
L S - S 0 4
P o r . p 5 8 /
Figure 47
Vent Restrictor
The appliance has a built-in vent restrictor,
refer to Figure 46 for location, to adjust the
flow of exhaust gases. This ensures proper
combustion for all vent configurations. De-
pending on the vent configuration, you may
be required to adjust the restriction position.
See below for guidelines.
CAUTION: THE FIREPLACE NEEDS TO BE ON
DURING THE ADJUSTMENT OF THE VENT
RESTRICTOR. USE A GLOVE TO PROTECT
YOUR HAND FROM BURNS.
Venting Adjustment Rod
Configuration
*
1. Horizontal Venting
Pointed toward
with 6" vent section and
the front.
one 90° elbow.
*
Pointed toward
2. Vertical venting.
the left.
*
3. Combination of ver-
Adjust
tical and horizontal
accordingly for
venting.
best result.
*
Adjustment to the air shutter may be re-
quired to get the desired flame appearance,
( refer to Figure 47 ).
Air
Shutter
Door
R Y A R I
R S E T T N I G
N N I G
( m m )
1 ( . 3 ) 0
1 ( . 5 ) 8
1 ( . 3 ) 0
1 ( . 5 ) 8
Position
25