HOMEOWNER'S CARE AND
OPERATION INSTRUCTIONS
DIRECT VENT
SPECTRA SERIES
VENTED GAS FIREPLACE HEATERS - DIRECT VENT MODELS
P/N 875,020M REV. A 12/2002
LENNOX HEARTH PRODUCTS
MODELS
LSS-35CN
LSS-35CP
LSS-40CN
LSS-40CP
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
LSS-40 MODEL SHOWN
AVERTISSEMENT: ASSUREZ-VOUS DE BIEN SUIVRE
LESINSTRUCTIONSDONNÉDANSCETTENOTICEPOUR
RÉDUIRE AU MINIMUM LE RISQUE D'INCENDIE OU
POUR ÉVITER TOUT DOMMAGE MATÉRIEL, TOUTE
BLESSURE OU LA MORT.
OTL Report No. 116-F-02-05
WARNING:IFTHEINFORMATIONINTHISMANUAL
IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLO-
SION MAY RESULT CAUSING PROPERTY DAM-
AGE, PERSONAL INJURY OR LOSS OF LIFE.
POURVOTRESÉCURITÉ: Nepasentreposerniutiliser
d'essencenid'autrevapeursouliquidesinflammables
dans le voisinage de cet appareil ou de tout autre
appareil.
FOR YOUR SAFETY: Do not store or use gasoline
or other flammable vapors or liquids in the vicin-
ity of this or any other appliance.
POUR VOTRE SÉCURITÉ: Que faire si vous sentez une
odeur de gaz:
FOR YOUR SAFETY: What to do if you smell gas:
• Ne pas tenter d'allumer d'appareil.
• Netouchezàaucuninterrupteur. Nepasvousservir
des téléphones se trouvant dans le batiment où
vous vous trouvez.
• Evacuez la piéce, le bâtiment ou la zone.
• Appelez immédiatement votre fournisseur de gaz
depuis un voisin. Suivez les instructions du
fournisseur.
• DO NOT light any appliance.
• DO NOT touch any electrical switches.
• DO NOT use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone.
Follow your gas suppliers instructions.
• Ifyourgassuppliercannotbereached, callthe
fire department.
• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service dos incendies.
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
L'installationetservicedoitêtreexécutéparunqualifié
installeur, agence de service ou le fournisseur de gaz.
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Maximum manifold pressure is 3.5 in. w.c.
(0.87 kPa) for natural gas and 10 in. w.c.
(2.49 kPa) for LP/Propane gas.
WARNING: FAILURE TO COMPLY
WITH THE INSTALLATION AND OP-
ERATING INSTRUCTIONS PROVIDED
IN THIS DOCUMENT WILL RESULT IN
AN IMPROPERLY INSTALLED AND OP-
ERATING APPLIANCE, VOIDING ITS
WARRANTY. ANY CHANGE TO THIS
APPLIANCE AND/OR ITS OPERATING
CONTROLS IS DANGEROUS. IM-
PROPER INSTALLATION OR USE OF
THIS APPLIANCE CAN CAUSE SERI-
OUS INJURY OR DEATH FROM FIRE,
BURNS, EXPLOSION OR CARBON
MONOXIDE POISONING.
Do not use these appliances if any part has been
under water. Immediately call a qualified, profes-
sional service technician to inspect the appliance
andtoreplaceanypartsofthecontrolsystemand
any gas control which have been under water.
Honeywell
Gas Valve
Ne pas se servir de cet appareil s'il a été plongé
dans l'eau, complètement ou en partie. Appeler
untechnicienqualifiépourinspecterl'appareilet
remplacertoutepartiedusystèmedecontrôleet
toutecommandequiontétéplongésdansl'leau.
Piezo
Ignitor
Carbon Monoxide Poisoning: Early signs of
carbon monoxide poisoning are similar to the
flu with headaches, dizziness and/or nausea.
If you have these signs, obtain fresh air imme-
diately. Turn off the gas supply to the appli-
anceandhaveitservicedbyaqualifiedprofes-
sional, as it may not be operating correctly.
Honeywell RF Control Millivolt Gas Valve
Showing Piezo Ignitor Location
Test gage connections are provided on the
front of the millivolt gas control valve (identi-
fied OUT for the manifold side and IN for inlet
pressure.
Figure 1
Minimum inlet gas pressure to these appli-
ancesis5.0 incheswatercolumn(1.24kPa)for
natural gas and 11 inches water column (2.74
kPa) for propane for the purpose of input ad-
justment.
INSTRUCTIONS FOR RF COMFORT
CONTROL VALVE
WARNING: CHILDREN AND ADULTS
SHOULD BE ALERTED TO THE HAZARDS
OFHIGHSURFACETEMPERATURES.USE
CAUTION AROUND THE APPLIANCE TO
AVOID BURNS OR CLOTHING IGNITION.
YOUNG CHILDREN SHOULD BE CARE-
FULLY SUPERVISED WHEN THEY ARE IN
THE SAME ROOM AS THE APPLIANCE.
The Comfort Control Valve allows remote con-
trol of temperature, fan and flame appearance.
Maximum inlet gas supply pressure to these
appliances is 10.5 inches water column (2.61
kPa) for natural gas and 13.0 inches water
column (3.23 kPa) for propane.
Note: The antenna should hang in free air and
away from any grounded metal.
Operation (refer to Figure 2, page 4 )
Step 1. If the manual switch is in the remote
position, switch it to LOCAL.
The appliance must be isolated from the gas
supply piping system (by closing its individual
manualshut-offvalve)duringanypressuretest-
ing of the gas supply piping system at test
pressures equal to or less than ¹⁄₂ psig (3.5 kPa).
WARNING: DO NOT PLACE CLOTH-
ING OR OTHER FLAMMABLE MATERI-
ALS ON OR NEAR THIS APPLIANCE.
Step 2. Turn the Pilotstat knob counter-
clockwise from OFF to the PILOT position,
push the knob down and hold it in position.
The pilot valve will open and allow gas to flow
to the pilot burner.
The appliance and its individual shut-off valve
must be disconnected from the gas supply
piping system during any pressure testing of
that system at pressures in excess of ¹⁄₂ psig
(3.5 kPa).
AVERTISSEMENT: SURVEILLER LES
ENFANTS. GARDER LES VÊTEMENTS,
LESMEUBLES, L'ESSENCEOUAUTRES
LIQUIDES À VAPEUR INFLAMMABLES
LOIN DE L'APPAREIL.
Step 3. Actuate the plunger on the piezo
(several times if necessary) until the pilot
burner is lit. When the pilot burner is lit, the
LED on the control will come on after approxi-
mately 40 seconds. The receiver/valve is fully
powered.
These appliances must not be connected to a
chimney or flue serving a separate solid fuel
burning appliance.
OPERATION AND CARE OF YOUR
APPLIANCE
Step 4. Release the knob. The shaft will
move forward. The pilot burner should now
stay burning. If the pilot burner goes out,
repeat Steps 2 and 3.
Any safety guard or screen removed for ser-
vicing the appliance must be replaced prior
to operating the appliance.
For piezo ignitor location, refer to Figure 1.
The control compartment is located behind
the bottom front face piece. For access:
Step 5. Turn the knob counterclockwise to
the ON position. If the manual switch is in the
LOCAL position, the main burner will turn on
immediately.
In the Cast Iron Face accessory - simply lift up
and pull directly out.
In the Rectangular or Arched Face accessory -
Pivot the main face door (bottom) on the two
hinge pins, and drop down to open.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
3
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Step 6. ON the initial use of a transmitter, a
recognition operation is required between the
receiver/valveandtransmitter. Changetheswitch
from LOCAL to REMOTE. Press the fan or flame
button on the transmitter within 30 seconds.
The LED will blink indicating the transmitter will
now work with the receiver/valve. If the switch
continuesintheREMOTEposition, thetransmit-
ter will now control the main valve, flame modu-
lation level and fan control.
Screw Cap Of Pilot
Adjustment
Piezo Ignitor
Step 7. If the manual switch is in the LOCAL
position, the valve will be at the highest fixed
pressure setting. The transmitter will control
the fan only.
Antenna
Local/Remote
Switch
Pilotstat
Knob
LED
Shut Off Procedure
Figure 2
If the manual switch is in the REMOTE posi-
tion, the transmitter can shut off the main
burnerandfan. However, thecontrolisstill on
and a command from the transmitter can turn
on the main burner or fan.
Display
- Room Temperature
- Set Temperature
- Flame Height Level
- Fan Speed Level
- Countdown Timer
- Low Battery
To shut off the system, turn the pilotstat knob
clockwisetotheOFFposition. Thisactioncloses
the main gas and safety valves. The transmitter
now cannot turn on the main burner or fan.
Mode
- Auto
- On
Flame
Up
- Off
(Increases Flame
Height, Fan Speed
Timer, or Set Point)
TRANSMITTER OPERATION -
(refer to Figure 3 )
Countdown
Timer
Down
Off Mode
(Decreases Flame,
Fan Speed Timer,
or Set Point)
Fan
In the OFF mode, the fireplace flame and fan
are off, the display will show OFF and displays
the room temperature. If the receiver is in
REMOTE mode, the fireplace will shut off.
Figure 3
Auto Mode
Fan Override During Auto Mode
On (Manual) Mode
In the AUTO mode, the room temperature, set
temperature,flameandfanlevelswillbeshown.
AUTO will appear next to both the flame and
fan icons.
If a lower or higher fan speed is desired when
operatingintheAUTOmode, thefanspeedcan
be overridden by pushing the fan button fol-
lowed by the up or down key.
In the ON mode, the room temperature, flame
and fan levels will be shown. MANUAL will
appear next to both the flame and fan icons.
When the control is in the AUTO mode, the
main burner will turn on/off or modulate based
ontheheatneededtomaintainthesettempera-
ture. The flame level will change automatically
to optimize the heat output needed to maintain
the set temperature. To change the set tem-
perature, press the up or down key. Pushing a
key once will change the temperature by 1
(one) degree. The setting temperature range
from 40° F (4.5° C) to 90° F (32.0° C).
Pushing a key once will change the fan level by
oneunit. Inthismode"AUTO"isdisplayednext
to the flame icon and "MANUAL" is displayed
next to the fan icon.
When the control is in the ON mode, the flame
and fan levels, and the delay timer are changed
with the up and down buttons. To change the
flame level, press the flame button followed by
anarrowkey. Tochangethefanlevel, pressthe
fan key followed by an arrow key. Pushing the
arrowkeyoncewillchangethelevelbyoneunit.
Change Between F/C Temperature Units
Push the up and down arrow keys simulta-
neously for at least 3 seconds to toggle be-
tween Fahrenheit and Celsius units.
Delay Timer Mode
The shut off delay timer has a maximum of 2
(two) hours and a minimum of 0 (zero) min-
utes. To change the timer level, press the time
key followed by an arrow key. Pushing the key
once will change the timer by 10 (ten) minutes.
In the AUTO mode, the fan speed will increase
with increasing flame height or decrease with
decreasing flame height. "AUTO" is displayed
next to the flame and fan icons.
Disable Thermostat Function
To disable the thermostat function in the AUTO
mode, push the time and down key simulta-
neously for at least 3 seconds.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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If an Error Code 3 is observed while perform-
ing the testing, complete the following:
LED Failure Code
(Number Of Blinks)
Service Action
To Change Batteries
1. Remove cover on the backside of the trans-
mitter. Install 3 AAA batteries as shown inside
the cover and reattach the cover.
8
7
Replace valve
Step 1. Make sure the spade connectors are
pushed all the way on. If the Error Code 3 is
still showing, then go to the next step.
Confirm stepper motor
connection exists
2. Once steps 1 thru 3 in OPERATION are
completed, receiver/valve and transmitter are
now ready. Press any button on transmitter
for recognition precess to occur between the
receiver/valve and transmitter.
Step 2. Switch the front two thermopile leads
with the back two. Be sure the lead is con-
nected to the spade with the white dot next to
it (see Figure 4 ). If the Error Code 3 is still
showing, replace the thermopiles.
5
4
Confirm fan connection
exists and works
Confirmgastype;jumper
in place
3. Use functions as described in TRANSMIT-
TER section.
If an Error Code 8 is observed while perform-
ing the testing, complete the following:
3
2
1
Replace thermopiles
Turn fan ON
Troubleshooting
Step 1. Confirm that the valve is not in
REMOTE mode.
Step 1. Locate LED light on valve.
No action required
Step2. LEDwillblinkaftereveryvalidcommand
received by the transmitter; this is not an error.
• If the valve is producing Error Code 8 and in
REMOTE mode, the valve is defective and
should be replaced.
NOTE: Some keys are not active. This is
normal.
Step 3. Failure codes may occur anytime after
pilot burner is lit.
• If the valve is in LOCAL mode and producing
Error Code 8, then go to the next step.
Step 4. Sequence is failure code followed by
Step 2. Slide the Remote/Local switch to
REMOTEandreprogramvalverecognition(re-
fer to in Operation section). The Error Code
will clear itself after approximately 1 1/2 min-
utes and return to normal operation.
light not blinking for 4 seconds.
Step 5. In the event of multiple failure codes,
next failure code follows previous failure code
by approximately 3 seconds
AUTO PATH DIAGRAM
COMFORT VALVE WIRING DIAGRAM
CAUTION: LABEL ALL WIRES PRIOR TO
DISCONNECTION WHEN SERVICING CONTROLS.
WIRING ERRORS CAN CAUSE IMPROPER AND
DANGEROUS OPERATION. VERIFY PROPER
OPERATION AFTER SERVICING.
BLOWER
BLACK
F
M
BLACK
WHITE
GREEN
M
GREEN
F
WHITE
F
F
White
Dots
VALVE
RED
WHITE
RED
WHITE
Figure 4
Figure 5
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
5
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Glass Cleaning
Comfort Valve System Control Sequence Of Operation With Transmitter
It will be necessary to clean the glass periodi-
cally. During start-up it is normal for conden-
sation to form on the inside of the glass. This
can cause lint, dust and other airborne par-
ticles to cling to the glass surface. Also initial
paint curing may deposit a slight film on the
glass. It is therefore recommended that the
glass be cleaned two or three times with a non-
ammonia household cleaner and warm water
(agasfireplaceglasscleanerisrecommended).
After that the glass should be cleaned two or
three times during each heating season, de-
pending on the circumstances present.
Note: Clean glass after first two weeks of
operationatleastonce. Insomeenvironments,
it may be necessary to clean the glass several
times during the first weeks of operation.
WARNING: DO NOT USE ABRASIVE
CLEANERS. NEVER CLEAN THE GLASS
WHEN IT IS HOT.
CAUTION: DO NOT ATTEMPT TO TOUCH THE
FRONT ENCLOSURE GLASS WITH YOUR
HANDS WHILE THE FIREPLACE IS IN USE.
Maintenance
The appliance and venting system should be
thoroughly inspected before initial use and at
least annually by a qualified service techni-
cian. However, more frequent periodic inspec-
tions and cleanings should be performed by
the homeowner. Homeowner must contact a
qualified service technician at once if any
abnormal condition is observed.
Refer to the maintenance schedule for mainte-
nancetasks,procedures,periodicityandbywhom
they should be performed. Always verify proper
operation of the appliance after servicing.
Figure 6
IMPORTANT: TURN OFF GAS AND ANY
ELECTRICAL POWER BEFORE SERVICING
THE APPLIANCE.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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Maintenance Schedule
Annually (Before the onset of the Burning Season)
Maintenance Task
Accomplishing Person
Procedure
Inspecting/Cleaning Burner, Logs
and Controls
Qualified Service Technician
Inspectvalveandensureitisproperlyoperating.
Check piping for leaks. Vacuum the control
compartment, fireplace logs and burner area.
Check Flame Patterns and Flame Height
Inspecting/Cleaning Pilot and Burner
Checking Vent System
Qualified Service Technician
Qualified Service Technician
Qualified Service Technician
Refer to Figure 9 (LSS-35),or Figure 10
(LSS-40) on page 10 and verify the flame
pattern and height displayed by the appli-
ance conforms to the picture. Flames must
not impinge on the logs.
Refer to Figure 11 on page 11. Remove any
surface build-up on pilot and burner assem-
bly. Wipe the pilot nozzles, ignitor/flame rod
and hood. Ensure the pilot flame engulfs the
flame sensor as shown.
Inspect the vent system at the top and at the
base (within the firebox) for signs of blockage
or obstruction. Look for any signs of disloca-
tion of the vent components. Do not adjust
the vent restrictor adjustment rod.
Appliance Checkout
Qualified Service Technician
Perform the appropriate appliance checkout
procedure detailed in this manual.
Replacing Rockwool Ember Materials
Homeowner/Qualified Services Technician
Remove old ember materials. Place new
rockwool as described in this document.
Periodically (After the Burning Season)
Maintenance Task
Accomplishing Person
Procedure
Refer to Figure 9 (LSS-35), or Figure 10
(LSS-40) on page 10 and verify the flame
pattern and height displayed by the appliance
conforms to the picture. Flames must not
impinge on the logs.
Check Flame Patterns and Flame Height
Homeowner
Inspect the vent system at the top and at the
base (within the firebox) for signs of block-
age or obstruction. Look for any signs of
dislocation of the vent components.
Checking Vent System
Homeowner
Homeowner
Cleaning Front Glass Enclosure Panel
Clean as necessary following the directions
provided in this manual. DO NOT TOUCH OR
ATTEMPT TO CLEAN GLASS WHILE HOT.
7
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Refer to Figure 7 and remove the front glass
enclosure panel as follows:
2. Position the door frame in front of the
firebox opening and engage the top flange
over the lip at the top of the firebox opening.
Front Glass Enclosure Panel, Removal
and Installation.
1. Remove the cast iron, arched or rectangular
WARNING: NEVER OPERATE THE AP-
PLIANCE WITHOUT THE GLASS ENCLO-
SURE PANEL IN PLACE AND SECURE.
DONOTOPERATEAPPLIANCEWITHTHE
FRONT GLASS PANEL CRACKED, BRO-
KEN OR MISSING. REPLACEMENT PAN-
ELS ARE AVAILABLE THROUGH YOUR
LOCAL LENNOX DEALER AND MUST BE
INSTALLED BY A LICENSED OR QUALI-
FIED SERVICE TECHNICIAN.
face kit.
3. Swing the door down and back. Ensure the
gasket seats evenly as the door draws shut.
Engage the Vee-flange at the bottom of the
door with the latches and close the latches to
secure the door.
CAUTION: DO NOT ATTEMPT TO REMOVE
UNTIL THE FACEPLATE IS COOL.
A) Cast Iron Face Kit:
1. Lift the top arched piece up and pull directly
out.
4. Hook the cast iron, arched or rectangular
facade onto the face of the fireplace.
2. Lift the bottom piece up and pull directly
out.
Burner Adjustments
The following paragraphs address burner ad-
justment concerns and procedures.
These are direct-vent appliances. They are
designed to operate only with the front glass
enclosure panel properly installed. Gener-
ally, the glass enclosure panel should not be
removed except to gain access to the com-
ponents within the firebox, and the appli-
ance may only be operated without the front
glass enclosure panel in place for very brief
periods of time during initial appliance check-
out and adjustment.
3. Lift the side pieces up and pull directly out.
B) Arched or Rectangular Face Kit:
1. Lift the face assembly up and pull directly
out.
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.
2. Locate the two (2) latches at the top of the
controlcompartmentanddisengagethemfrom
the door frame's bottom Vee-flange, pulling
down on their handles to open them.
3. Swing the bottom of the door out and raise
it slightly to lift the top flange of the door frame
away from the appliance.
During this appliance checkout and adjust-
ment period, a potential safety hazard exists
- EXERCISE EXTREME CAUTION to prevent
the occurrence of any burn injuries from the
exposed flames or hot surfaces. Also note,
that while the front glass enclosure panel is
removed, the flame appearance will appear to
be smaller than normal.
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
flamesandalackofcombustionairenteringthe
air shutter opening.
Top Flange
Door Frame
Vent Restrictor
Adjustment Rod
Glass Door
Latch
WARNING: HANDLE THE GLASS WITH
EXTREME CARE! TEMPERED GLASS IS
SUSCEPTIBLETODAMAGE(SCRATCHES,
FOR EXAMPLE) – HANDLE GLASS DOOR
(GLASS ENCLOSURE PANEL) GENTLY
WHILE REINSTALLING IT.
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. Nosmokeorsootshouldbepresent.
Reposition the logs if the flames impinge on
any of them.
WARNING: NO NOT ATTEMPT TO SUB-
STITUTETHEMATERIALSUSEDONTHIS
DOOR,ORREPLACECRACKEDORBRO-
KEN GLASS WITH ANY MATERIALS
OTHER THAN THOSE PROVIDED BY THE
APPLIANCE MANUFACTURER.
If the logs are properly positioned and sooting
conditions exist, the air shutter opening on the
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.
Bottom Vee-flange
Latch
Door Frame
Firebox Floor
Figure 7
WARNING: AIR SHUTTER ADJUSTMENT
SHOULD ONLY BE PERFORMED BY A
QUALIFIED PROFESSIONAL SERVICE
TECHNICIAN.
To install the front glass enclosure panel,
proceed as follows:
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 QUALI-
FIED SERVICE PERSON.
1. Retrieve the glass door frame. Visually
inspect the gasket on the backside of the
panel. The gasket surface must be clean, free
of irregularities and seated firmly.
ENSURE THAT THE FRONT GLASS PANEL IS IN
PLACE AND SEALED DURING ADJUSTMENT.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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Adjustment
Vent Restrictor
Burner
Venturi
Tube
CAUTION: THE AIR SHUTTER ADJUSTMENT
ROD (SEE FIGURE 8 ) AND NEARBY APPLI-
ANCE SURFACES ARE HOT. EXERCISE CAU-
TION TO AVOID INJURY WHILE ADJUSTING
FLAME APPEARANCE.
The appliance has a built-in vent restrictor,
refer to Figure 7, page 8 for location, to adjust
the flow of exhaust gases. This ensures
proper combustion for all vent configura-
tions. Depending on the vent configuration,
you may be required to adjust the restriction
position. See below for guidelines.
Air Shutter
Opening
To adjust the flame, restate 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
8. Allow the burner to operate for at least 15
minutes. Observe the flame continuously. If it
appearsweakorsootyaspreviouslydescribed,
adjust the air shutter by pushing or pulling on
the adjustment rod until the flame appearance
is as desired.
Air
Orifice
Shutter
Door
CAUTION: THE FIREPLACE NEEDS TO BE ON
DURING THE ADJUSTMENT OF THE VENT
RESTRICTOR. USE A GLOVE TO PROTECT
YOUR HAND FROM BURNS.
Venting
Configuration
Adjustment Rod
Position
Air Shutter
Adjusting
Rod
1. Horizontal Venting
with 6" vent section and
one 90° elbow.
* Pointed toward
the front.
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 disas-
sembling the appliance and waiting for 30 min-
utes after each adjustment.
* Pointed toward
the left.
2. Vertical venting.
3. Combination of ver-
tical and horizontal
venting.
* Adjust
FACTORY AIR
accordingly for
best result.
SHUTTER SETTING
OPENING
Gas
Type
Models
Propane models may exhibit a flame pattern
that may candle or appear stringy. If this is
problematic or persists as the appliance is
continually operated, adjust the air shutter
closedasdescribedinthepreviousparagraphs.
inches (mm)
* Adjustment to the air shutter may be re-
quired to get the desired flame appearance,
(refer to Figure 8 ).
Nat.
Prop.
Nat.
1/2 (13.0)
5/8 (15.8)
1/2 (13.0)
5/8 (15.8)
LSS-35
LSS-40
Prop.
Operate the appliance for a period of time as
the effect diminishes, ensuring that the appli-
ance does not develop sooty flames.
Figure 8
When satisfied that the appliance operates
properly, proceed to finish the installation.
Leave the control knob in “ON” position and
turn the remote switch “OFF.” Close the lower
control compartment door.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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Log Placement
WARNING: LOGS GET VERY HOT AND
WILL REMAIN HOT UP TO ONE HOUR
AFTER GAS SUPPLY IS TURNED OFF.
HANDLE ONLY WHEN LOGS ARE COOL.
TURN OFF ALL ELECTRICITY TO THE
APPLIANCE BEFORE YOU INSTALL
GRATE AND LOGS.
WARNING: THE SIZE AND POSITION ON
THELOGSETWASENGINEEREDTOGIVE
YOUR APPLIANCE A SAFE, RELIABLE
AND ATTRACTIVE FLAME PATTERN.
ANY ATTEMPT TO USE A DIFFERENT
LOG SET IN THE FIREPLACE WILL VOID
THE WARRANTY AND WILL RESULT IN
INCOMPLETECOMBUSTION, SOOTING,
AND POOR FLAME QUALITY.
Figure 9
MODEL LSS-35
WARNING: THIS APPLIANCE IS NOT
MEANT TO BURN WOOD. ANY AT-
TEMPT TO DO SO COULD CAUSE IR-
REPARABLE DAMAGE TO YOUR APPLI-
ANCE AND PROVE HAZARDOUS TO
YOUR SAFETY.
Carefully position the ceramic fiber logs over
the burner as shown in Figure 9 (LSS-35) or
Figure10(LSS-40). Formoredetailedplace-
ment instructions, refer to the LOG PLACE-
MENT GUIDE accompanying this document.
Proper log placement is critical to prevent
sooting. Logs should be placed in the gaps
between the flame peaks and should be posi-
tioned so that at no time they impinge the
flames.
MODEL LSS-40
Figure 10
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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Glowing Embers (Rockwool) Placement
To adjust pilot burner; (by a qualified service
technician)
MILLIVOLT HONEYWELL
Thermopile
Ignitor Rod
Hood
Refer to the detailed glowing embers place-
ment instructions provided in the LOG PLACE-
MENT GUIDE accompanying this document.
³⁄₈" Min
(9 mm)
1. Remove pilot adjustment cap.
2. Adjust pilot screw to provide properly sized
flame.
Honeywell RF Control Millivolt Appliance
Pilot Checkout
³⁄₈" Min
(9 mm)
3. Replace pilot adjustment cap.
Pilot
Nozzels
Pilot Inspection
The primary air shutter is set at the factory and
should only be adjusted, if necessary, by a
qualified service technician.
To obtain proper operation, it is imperative that
the pilot and burner's flame characteristics are
steady, not lifting or floating (see Figure 11 ).
Thermopile
Figure 11
Typically, the top 3/8" of the thermopile should be
engulfed in the pilot flame (Figure 11 ).
If you encounter any problems or have any
questions concerning the installation or appli-
cation of this system, please contact your dis-
tributor, or Lennox directly:
WARRANTY
1. The model number of the appliance.
2. The serial number of the appliance.
3. The part number.
4. The description of the part.
5. The quantity required.
Your gas appliance is covered by a limited
twenty year warranty. You will find a copy of
the warranty accompanying this manual.
Please read the warranty to be familiar with
its coverage.
LHP
6. The installation date of the appliance.
1110 West Taft Avenue
Orange, CA 92865
Retain this manual. File it with your other docu-
ments for future reference.
PRODUCT REFERENCE INFORMATION
We recommend that you record the following important information about your fireplace. Please
contact your Lennox dealer for any questions or concerns. For the number of your nearest Lennox
dealer, please call 800-731-8101
REPLACEMENT PARTS
A complete parts list is found at the end of this
manual. Use only parts supplied from the
manufacturer.
Your Fireplace's Model Number _______________________________________
Your Fireplace's Serial Number ________________________________________
The Date On Which Your Fireplace Was Installed __________________________
The Type of Gas Your Fireplace Uses ___________________________________
Your Dealer's Name_________________________________________________
Normally, all parts should be ordered through
your Lennox distributor or dealer. Parts will be
shipped at prevailing prices at time of order.
When ordering repair parts, always give the
following information:
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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ACCESSORY COMPONENTS
Cast Iron Kits
Model
Series
Catalog
No.
Model No.
LSS-35
H0378
LSS-CA35
LSS-CA40
LSS-40
H0398
Cast Iron Kits
Thesecastironfacekitsaredesignedtobeusedinconjunctionwiththegrillworkkits. Together,
when installed, these kits complete the front aspect of the Spectra LSS Series gas fireplaces. A
detailed set of instructions (P/N 750,150M) is included with each kit.
Touch-Up Paint (Black) Kit
90L73
FTPK-B
Touch-Up Paint Kit
Repair of minor scratches and discoloration
of the appliance's painted surfaces may be
accomplished with the use of this touch-up
paint kit.
Grillwork Kits (Top & Bottom)
Model
Series
Finish
Catalog No.
Model No.
Black
Gold
Nickel
H0379
H0380
H0381
LSS-GB35
LSS-GG35
LSS-GN35
LSS-35
Black
Gold
Nickel
H0399
H0400
H0404
LSS-GB40
LSS-GG40
LSS-GN40
LSS-40
Grillwork Kits (Top & Bottom)
These grillwork kits are designed to be used in conjunction with the Cast Iron Face kits.
Together, when installed, these complete the front aspect of the Spectra LSS Series gas
fireplace. A detailed set of instructions (P/N 750,151M) is included with each kit.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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ACCESSORY COMPONENTS CONTINUED
Rectangular Face Kits
Model
Series
Finish
Catalog No.
Model No.
Black
Gold
Brushed Nickel
H0386
H0387
H0389
LSS-PT35B
LSS-PT35G
LSS-PT35BN
LSS-35
Black
Gold
Brushed Nickel
H0409
H0410
H0413
LSS-PT40B
LSS-PT40G
LSS-PT40BN
LSS-40
Rectangular Face Kits
These rectangular face kits are designed to be used with the Spectra LSS series gas fireplace.
When installed, these kits complete the front aspect of these fireplaces. A detailed set of
instructions (P/N 750,152M) is included with each kit.
Arched Face Kits
Model
Series
Finish
Catalog No.
Model No.
Black
Gold
Brushed Nickel
H0382
H0383
H0385
LSS-PA35B
LSS-PA35G
LSS-PA35BN
LSS-35
Black
Gold
Brushed Nickel
H0405
H0406
H0408
LSS-PA40B
LSS-PA40G
LSS-PA40BN
LSS-40
Arched Face Kits
These arched face kits are designed to be used with the Spectra LSS series gas fireplace.
When installed, these kits complete the front aspect of these fireplaces. A detailed set of
instructions (P/N 750,152M) is included with each kit.
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REPLACEMENT PARTS LIST
LSS-35
LSS-40
Part No.
No.
DESCRIPTION
Part No.
LB-92534N
69L2101
35M6101
35M7701
35M7501
LB-92813
LB-92811F
LB-92811B
LB-92812B
LB-92820B
41M86
Qty.
Qty.
1
2
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1.
2.
Enclosure, Glass Front (Complete)
Latch
1
2
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
LB-92534P
69L2101
35M6201
35M7801
35M7601
LB-92813
LB-92811G
LB-92811C
LB-92812C
LB-92820C
41M87
3.
Log Set (Complete)
4.
Burner Rear Assembly
Burner Front
5.
6.
Burner Bracket
7.
Burner Support - Left
Burner Support - Right
Front Baffle
8.
9.
10.
11.
12.
12.
13.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
Grate Assembly
Refactory Panels
Orifice, Rear Main Burner - Nat. Gas
Orifice, Rear Main Burner - LP Gas
Orifice, Front Main Burner - Nat. Gas
Orifice, Front Main Burner - LP Gas
Bag of Rock Wool
60J80
LB-69645
88J59
19L52
35M9001
35M9101
88L53
39L6601
62L3701
88L53
Venturi Tube - Rear Burner
Gas Line - Rear Burner
Gas Line - Front Burner
Air Shutter Adjustment Linkage
Linkage Mounting Bracket
Pilot Bracket
35M3701
LB-92834A
LB-92833A
LB-92544
LB-92546
LB-92770
35M53
35M3801
LB-92834B
LB-92833B
LB-92544
LB-92546
LB-92770
35M53
RF Remote Control
Power Cord
35M8501
35M8401
35M8501
35M8401
Blower
GAS CONTROLS
LSS-35
LSS-40
No.
DESCRIPTION
Part No.
35M5401
35M8301
35M5201
60J79
Qty.
1
Part No.
35M5401
35M8301
35M5201
60J79
Qty.
1
30.
30.
31.
32.
33.
34.
35.
36.
Gas Valve - Natural Gas
Gas Valve - LP Gas
Pilot Assembly
1
1
1
1
Pilot Generator
2
2
Pilot Tube
67L6801
67L8701
43K33
1
67L6801
67L8701
43K33
1
Electrode and Cable
Flexible Connector
Piezo Ignitor
1
1
1
1
24M8901
1
24M8901
1
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REPLACEMENT PARTS
11
LSS35
3
LSS40
1
12
13
32
2
31
14
18
33
34
19
20
35
36
30
4
6
10
15
7
9
6
17
5
8
16
Gas Train Assembly - Bottom View
21
22
23
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LENNOX reserves the right to make changes at any time, without notice, in design, materials, specifications, prices and also to discontinue colors, styles and products.
Consult your local distributor for fireplace code information.
Printed in U.S.A. © 2002 by LENNOX
P/N 875,020M REV. A 12/2002
1110 West Taft Avenue • Orange, CA 92865
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