Lennox Hearth Products LSS-35CN User manual

1
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
HOMEOWNER'S CARE AND
OPERATION INSTRUCTIONS
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.
FOR YOUR SAFETY: What to do if you smell gas:
• 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.
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
POURVOTRESÉCURITÉ: Nepasentreposerniutiliser
d'essencenid'autrevapeursouliquidesinflammables
dans le voisinage de cet appareil ou de tout autre
appareil.
POUR VOTRE SÉCURITÉ: Que faire si vous sentez une
odeur de gaz:
• 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.
• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service dos incendies.
L'installationetservicedoitêtreexécutéparunqualifié
installeur, agence de service ou le fournisseur de gaz.
MODELS
LENNOX HEARTH PRODUCTS VENTED GAS FIREPLACE HEATERS - DIRECT VENT MODELS
P/N 875,020M REV. C 05/2006
DIRECT VENT
SPECTRA SERIES
LSS-35CN LSS-40CN
LSS-35CP LSS-40CP
OTL Report No. 116-F-02-05
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING:IFTHEINFORMATIONINTHISMANUAL
IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLO-
SION MAY RESULT CAUSING PROPERTY DAM-
AGE, PERSONAL INJURY OR LOSS OF LIFE.
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.
A French manual is available upon request. Order Form Number
875,020CF.
Ce manuel d’installation est disponible en francais, simplement en
faire la demande. Numéro de la pièce 875,020CF.
WARNINGS
•Hot! Do not touch! The glass and
surfaces of this appliance will be hot
during operation and will retain heat
for a while after shutting off the appli-
ance. Severe burns may result.
•Carefully supervise children in the
same room as appliance.
•If small children are present in the home, it is
recommended that this appliance be fitted with
a screen door or screen panel kit. See
Page 12
for ordering information.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
2
These appliances are designed to operate on
natural or propane gas only.
Input of millivolt models is variable. These
rates are shown in the following table:
CONGRATULATIONS!
In selecting this LENNOX Signature Series Direct-Vent Gas Appliance you have chosen
the finest and most dependable fireplace to be found anywhere. A beautiful, prestigious,
alternative to a wood burning fireplace. Welcome to a Family of tens of thousands of
satisfied LENNOX Fireplace Owners.
Please read and carefully follow all of the instructions found in this manual. Please pay
special attention to the safety instructions provided in this manual. The Homeowner's
Care and Operation Instructions included here will assure that you have many years of
dependable and enjoyable service from your LENNOX product.
INTRODUCTION
The Fireplace models covered in this manual
are Direct-Vent sealed combustion vented gas
fireplace heaters designed for residential ap-
plication. Direct-Vent appliances operate with
the combustion chamber completely isolated
from the inside atmosphere. All air for com-
bustion is brought in from the outside and
exhaust gases are vented through the same
direct vent, vent system.
GENERAL INFORMATION
Note: Installation and repair should be per-
formedby aqualified serviceperson.The appli-
ance should be inspected annually by a quali-
fied professional service technician. More fre-
quent inspections and cleanings may be re-
quired due to excessive lint from carpeting,
bedding material, etc. It is imperative that the
control compartment, burners and circulating
airpassagewaysoftheappliancebe keptclean.
S'assurer que le brùleur et le compartiment
des commandes sont propres. Voir les in-
structions d'installation et d'utilisation qui
accompagnent l'appareil.
Provide adequate clearances around air open-
ings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front openings of the appliance.
Duetohightemperaturestheappliance should
be located out of traffic and away from furni-
ture and draperies. Locate furniture and win-
dow coverings accordingly.
These appliances feature a comfort control
valve which allows remote control of tem-
perature, fan and flame appearance. These
appliances also use a spark ignitor (piezo)
that allows the appliance's pilot gas to be lit
without the use of matches. This system
provides continued service in the event of a
power outage.
TABLE OF CONTENTS
Introduction ..................................... page 2
General Information......................... page 2
Operation/Care of Your Appliance.... page 3
RF Comfort Control Valve Operation page 3
Transmitter Operation...................... page 4
Trouble shooting ............................. page 5
Glass Cleaning ................................. page 6
Maintenance .................................... page 6
Maintenance Schedule..................... page 7
Front Glass Enclosure Panel,
Removal and Installation ............... page 8
Burner Adjustments......................... page 8
Flame Appearance and Sooting ....... page 8
Adjustment ...................................... page 9
Vent Restrictor ................................ page 9
Log Placement................................. page 10
Rockwool Placement ....................... page 10
Pilot Inspection ............................... page 10
Warranty.......................................... page 11
Replacement Parts .......................... page 11
Product Reference Information ....... page 11
Accessory Components ................... page 11
Replacement Parts List ..................... page 14
The following table shows the units' orifice size
fortheelevationsof0-4500feet(0-1370meters).
ledoMleuF mumixaM tupnI )H/UTB(
muminiM tupnI )H/UTB(
NC53-SSLsaG.taN000,33005,32
PC53-SSLsaGPL000,13005,32
NC04-SSLsaG.taN005,14004,82
PC04-SSLsaGPL000,93007,03
ledoMleuF raeR renruB tnorF renruB
NC53-SSLsaG.taN44#05#
PC53-SSLsaGPL55#16#
NC04-SSLsaG.taN24#54#
PC04-SSLsaGPL"450.065#
The external electrical power (120v) is re-
quired to operate the provided circulating
blower.
These appliances comply with National Safety
Standards and are tested and listed by Omni-
Test Laboratories (Report No. 116-F-02-5) to
ANSIZ21.88-2002(inCanada,CSA-2.33-2002),
and CAN/CGA-2.17-M91 in both USA and
Canada, as vented gas fireplace heaters.
The Installation must conform to local codes
or, in the absence of local codes, with the
National Fuel Gas Code, ANSI Z223.1/NFPA
54 , or the Natural Gas and Propane Installa-
tion Code, CSA B149.1 . The appliance, when
installed, must be electrically grounded in
accordance with local codes or, in the ab-
sence of local codes, with the National Elec-
trical Code, ANSI/NFPA 70 , or the Canadian
Electrical Code, CSA C22.1 .
DO NOT ATTEMPT TO ALTER OR MODIFY
THE CONSTRUCTION OF THE APPLIANCE OR
ITS COMPONENTS. ANY MODIFICATION OR
ALTERATION MAY VOID THE WARRANTY,
CERTIFICATIONANDLISTINGSOFTHISUNIT.
WARNING: THESE FIREPLACES ARE
VENTED HEATERS. DO NOT BURN
WOOD OR OTHER MATERIAL IN THESE
APPLIANCES.
WARNING: IMPROPERINSTALLATION,
ADJUSTMENT, ALTERATION, SERVICE
ORMAINTENANCECAN CAUSE INJURY
OR PROPERTY DAMAGE. REFER TO
THIS MANUAL. FOR ASSISTANCE OR
ADDITIONAL INFORMATION CONSULT
A QUALIFIED INSTALLER, SERVICE
AGENCY OR THE GAS SUPPLIER.

3
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Carbon Monoxide Poisoning: Early signs of
carbon monoxide poisoning are similar to the
flu with headaches, dizziness and/or nausea.
Ifyou have these signs, obtainfresh air imme-
diately. Turn off the gas supply to the appli-
anceandhaveitservicedbyaqualifiedprofes-
sional, as it may not be operating correctly.
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.
Do not use these appliances if any part has been
under water. Immediately call a qualified, profes-
sional service technician to inspect the appliance
andto replaceanyparts ofthe controlsystem and
any gas control which have been under water.
Ne pas se servir de cet appareil s'il a été plongé
dans l'eau, complètement ou en partie. Appeler
untechnicienqualifié pourinspecterl'appareil et
remplacertoute partie dusystème de contrôleet
toutecommandequi ontétéplongés dansl'leau.
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.
Minimum inlet gas pressure to these appli-
ancesis5.0 incheswater column(1.24kPa)for
natural gas and 11 inches water column (2.74
kPa) for propane for the purpose of input ad-
justment.
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.
The appliance must be isolated from the gas
supply piping system (by closing its individual
manualshut-off valve) duringany pressuretest-
ing of the gas supply piping system at test
pressuresequal to or less than¹⁄₂ psig (3.5 kPa).
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).
Theseappliances must not be connectedto a
chimney or flue serving a separate solid fuel
burning appliance.
Any safety guard or screen removed for ser-
vicing the appliance must be replaced prior
to operating the appliance.
OPERATION AND CARE OF YOUR
APPLIANCE
For piezo ignitor location, refer to Figure 1.
The control compartment is located behind
the bottom front face piece. For access:
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.
Figure 1
Honeywell RF Control Millivolt Gas Valve
Showing Piezo Ignitor Location
Piezo
Ignitor
Honeywell
Gas Valve
INSTRUCTIONS FOR RF COMFORT
CONTROL VALVE
The Comfort Control Valve allows remote con-
trol of temperature, fan and flame appearance.
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.
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.
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
LEDon the controlwill come onafter approxi-
mately40 seconds. Thereceiver/valve is fully
powered.
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.
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.
WARNING: FAILURE TO COMPLY
WITH THE INSTALLATION AND OP-
ERATING INSTRUCTIONS PROVIDED
IN THIS DOCUMENT WILL RESULT IN
ANIMPROPERLY INSTALLEDANDOP-
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.
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.
WARNING: DO NOT PLACE CLOTH-
ING OR OTHER FLAMMABLE MATERI-
ALS ON OR NEAR THIS APPLIANCE.
AVERTISSEMENT: SURVEILLER LES
ENFANTS. GARDER LES VÊTEMENTS,
LESMEUBLES, L'ESSENCE OUAUTRES
LIQUIDES ÀVAPEUR INFLAMMABLES
LOIN DE L'APPAREIL.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
4
Piezo Ignitor
Local/Remote
Switch Antenna
Pilotstat
Knob LED
Screw Cap Of Pilot
Adjustment
Display
- Room Temperature
- Set Temperature
- Flame Height Level
- Fan Speed Level
- Countdown Timer
- Low Battery
Countdown
Timer
Flame
Fan
Up
(Increases Flame
Height, Fan Speed
Timer, or Set Point)
Down
(Decreases Flame,
Fan Speed Timer,
or Set Point)
Mode
- Auto
- On
- Off
Figure 2
Figure 3
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
continuesinthe REMOTEposition, thetransmit-
ter will now control the main valve, flame modu-
lation level and fan control.
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.
Shut Off Procedure
If the manual switch is in the REMOTE posi-
tion, the transmitter can shut off the main
burnerandfan. However, thecontrolis still on
and a command from the transmitter can turn
on the main burner or fan.
To shut off the system, turn the pilotstat knob
clockwisetotheOFF position. Thisactioncloses
the main gas and safety valves. The transmitter
now cannot turn on the main burner or fan.
TRANSMITTER OPERATION -
( refer to Figure 3 )
Off Mode
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.
On (Manual) Mode
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 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
anarrow key. To change the fanlevel, press the
fan key followed by an arrow key. Pushing the
arrowkeyoncewillchangethelevelbyoneunit.
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.
Auto Mode
In the AUTO mode, the room temperature, set
temperature,flameandfanlevelswillbeshown.
AUTO 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
ontheheatneeded tomaintainthesettempera-
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).
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.
Fan Override During Auto Mode
If a lower or higher fan speed is desired when
operatinginthe AUTOmode,the fanspeedcan
be overridden by pushing the fan button fol-
lowed by the up or down key.
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.
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.
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.

5
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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.
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.
3. Use functions as described in TRANSMIT-
TER section.
Troubleshooting
Step 1. Locate LED light on valve.
Step2. LED willblinkafter everyvalid command
received by the transmitter; this is not an error.
Step 3. Failure codes may occur anytime after
pilot burner is lit.
Step 4. Sequence is failure code followed by
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
If an Error Code 3 is observed while perform-
ing the testing, complete the following:
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.
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.
If an Error Code 8 is observed while perform-
ing the testing, complete the following:
Step 1. Confirm that the valve is not in
REMOTE mode.
•If the valve is producing Error Code 8 and in
REMOTE mode, the valve is defective and
should be replaced.
•If the valve is in LOCAL mode and producing
Error Code 8, then go to the next step.
Step 2. Slide the Remote/Local switch to
REMOTEandreprogramvalve recognition(re-
fer to in Operation section). The Error Code
will clear itself after approximately 1 1/2 min-
utes and return to normal operation.
COMFORT VALVE WIRING DIAGRAM AUTO PATH DIAGRAM
Figure 4 Figure 5
LED Failure Code Service Action
(Number Of Blinks)
8 Replace valve
7 Confirm stepper motor
connection exists
5 Confirm fan connection
exists and works
4 Confirmgastype;jumper
in place
3 Replace thermopiles
2 Turn fan ON
1 No action required
NOTE: Some keys are not active. This is
normal.
BLOWER
WHITE
BLACK
GREEN
BLACK
GREEN
F
M
F
FM
RED
WHITE
RED
WHITE
VALVE
F
WHITE
White
Dots
CAUTION: LABEL ALL WIRES PRIOR TO
DISCONNECTION WHEN SERVICING CONTROLS.
WIRING ERRORS CAN CAUSE IMPROPER AND
DANGEROUS OPERATION. VERIFY PROPER
OPERATION AFTER SERVICING.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
6
CAUTION: DO NOT ATTEMPT TO TOUCH THE
FRONT ENCLOSURE GLASS WITH YOUR
HANDS WHILE THE FIREPLACE IS IN USE.
Glass Cleaning
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
glassbe cleanedtwo orthree timeswitha 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. Insome environments,
it may be necessary to clean the glass several
times during the first weeks of operation.
Maintenance
The appliance and venting system should be
thoroughly inspected before initial use and at
least annually by a qualified service techni-
cian.However, morefrequent periodicinspec-
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.
IMPORTANT: TURN OFF GAS AND ANY
ELECTRICAL POWER BEFORE SERVICING
THE APPLIANCE.
Comfort Valve System Control Sequence Of Operation With Transmitter
Figure 6
WARNING: DO NOT USE ABRASIVE
CLEANERS. NEVER CLEAN THE GLASS
WHEN IT IS HOT.

7
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Periodically (After the Burning Season)
Maintenance Task Accomplishing Person Procedure
Check Flame Patterns and Flame Height
Checking Vent System
Cleaning Front Glass Enclosure Panel
Homeowner
Homeowner
Homeowner
Maintenance Task Accomplishing Person Procedure
Inspecting/Cleaning Burner, Logs
and Controls
Check Flame Patterns and Flame Height
Inspecting/Cleaning Pilot and Burner
Checking Vent System
Appliance Checkout
Replacing Rockwool Ember Materials
Qualified Service Technician
Qualified Service Technician
Qualified Service Technician
Qualified Service Technician
Qualified Service Technician
Homeowner/Qualified Services Technician
Inspectvalveandensureitisproperlyoperating.
Check piping for leaks. Vacuum the control
compartment, fireplace logs and burner area.
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) forsigns of blockage
or obstruction. Look for any signs of disloca-
tion of the vent components. Do not adjust
the vent restrictor adjustment rod.
Perform the appropriate appliance checkout
procedure detailed in this manual.
Remove old ember materials. Place new
rockwool as described in this document.
Maintenance Schedule
Annually (Before the onset of the Burning Season)
Clean as necessary following the directions
provided in this manual. DO NOT TOUCH OR
ATTEMPT TO CLEAN GLASS WHILE HOT.
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.
Refer to
Figure 9 (LSS-35), or Figure 10
(LSS-40) on page 10 and verify the flame
patternand height displayed by the appliance
conforms to the picture. Flames must not
impinge on the logs.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
8
ENSURE THAT THE FRONT GLASS PANEL IS IN
PLACE AND SEALED DURING ADJUSTMENT.
To install the front glass enclosure panel,
proceed as follows:
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.
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
periodsof timeduringinitial appliancecheck-
out and adjustment.
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.
WARNING: NO NOT ATTEMPT TO SUB-
STITUTETHEMATERIALSUSEDONTHIS
DOOR,ORREPLACECRACKEDORBRO-
KEN GLASS WITH ANY MATERIALS
OTHER THAN THOSE PROVIDED BY THE
APPLIANCE MANUFACTURER.
Refer to Figure 7 and remove the front glass
enclosure panel as follows:
1.Remove the castiron, archedor rectangular
face kit.
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.
2. Lift the bottom piece up and pull directly
out.
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.
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
itslightly to lift the topflange of the doorframe
away from the appliance.
Figure 7
Latch
Latch
Glass Door
Firebox Floor
Bottom Vee-flange
Door Frame
Top Flange
Door Frame Vent Restrictor
Adjustment Rod
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
flamesandalackofcombustionairenteringthe
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. Nosmokeorsootshouldbepresent.
Reposition the logs if the flames impinge on
any of them.
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.
Front Glass Enclosure Panel, Removal
and Installation. 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.
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.
4. Hook the cast iron, arched or rectangular
facade onto the face of the fireplace.
Burner Adjustments
The following paragraphs address burner ad-
justment concerns and procedures.
WARNING: NEVER OPERATE THE AP-
PLIANCEWITHOUT 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.
WARNING: HANDLE THE GLASS WITH
EXTREME CARE! TEMPERED GLASS IS
SUSCEPTIBLETODAMAGE(SCRATCHES,
FOR EXAMPLE) –HANDLE GLASS DOOR
(GLASS ENCLOSURE PANEL) GENTLY
WHILE REINSTALLING IT.
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.
WARNING: AIR SHUTTER ADJUSTMENT
SHOULD ONLY BE PERFORMED BY A
QUALIFIED PROFESSIONAL SERVICE
TECHNICIAN.

9
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 8
sledoM saG epyT
RIAYROTCAF GNITTESRETTUHS GNINEPO )mm(sehcni
53-SSL .taN2/1)0.31(
.porP8/5)8.51(
04-SSL .taN2/1)0.31(
.porP8/5)8.51(
Air Shutter
Opening
Burner
Venturi
Tube
Air
Shutter
Door
Orifice
Air Shutter
Adjusting
Rod
Adjustment
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.
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.
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.
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.
Operate the appliance for a period of time as
the effect diminishes, ensuring that the appli-
ance does not develop sooty flames.
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.
Vent Restrictor
The appliance has a built-in vent restrictor,
referto
Figure7,page8 forlocation, toadjust
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.
*Adjustment to the air shutter may be re-
quired to get the desired flame appearance,
( refer to Figure 8 ).
1. Horizontal Venting
with 6" vent section and
one 90°elbow.
*Pointed toward
the front.
2. Vertical venting.
3. Combination of ver-
tical and horizontal
venting.
*Pointed toward
the left.
*Adjust
accordingly for
best result.
Venting
Configuration Adjustment Rod Position
CAUTION: THE FIREPLACE NEEDS TO BE ON
DURING THE ADJUSTMENT OF THE VENT
RESTRICTOR. USE A GLOVE TO PROTECT
YOUR HAND FROM BURNS.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
10
Glowing Embers (Rockwool) Placement
Refer to the detailed glowing embers place-
mentinstructions provided inthe LOGPLACE-
MENT GUIDE accompanying this document.
Honeywell RF Control Millivolt Appliance
Pilot Checkout
Pilot Inspection
To obtain proper operation, it is imperative that
the pilot and burner's flame characteristics are
steady, not lifting or floating (
see Figure 11 ).
Typically, the top 3/8" of the thermopile should be
engulfed in the pilot flame (
Figure 11 ).
Figure 11
Thermopile
Ignitor Rod
Hood
³⁄₈" Min
(9 mm)
Thermopile
MILLIVOLT HONEYWELL
Pilot
Nozzels
³⁄₈" Min
(9 mm)
To adjust pilot burner; (by a qualified service
technician)
1. Remove pilot adjustment cap.
2. Adjust pilot screw to provide properly sized
flame.
3. Replace pilot adjustment cap.
Theprimary air shutter is setat the factory and
should only be adjusted, if necessary, by a
qualified service technician.
Log Placement
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-35
Figure 9
Figure 10
MODEL LSS-40
WARNING: LOGS GET VERY HOT AND
WILL REMAIN HOT UP TO ONE HOUR
AFTER GAS SUPPLY IS TURNED OFF.
HANDLEONLY 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.
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.

11
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
WARRANTY
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.
Retain this manual. File it with your other docu-
ments for future reference.
REPLACEMENT PARTS
A complete parts list is found at the end of this
manual. Use only parts supplied from the
manufacturer.
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:
PRODUCT REFERENCE INFORMATION
We recommend that you record the following important information about your fireplace. Please
contactyour Lennox dealer for anyquestions or concerns. For the numberof your nearest Lennox
dealer, please call 800-731-8101
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_________________________________________________
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:
LHP
1110 West Taft Avenue
Orange, CA 92865
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.
6. The installation date of the appliance.
ACCESSORY COMPONENTS
Cast Iron Kits
Thesecast ironface kits aredesigned tobe usedin conjunction withthe grillworkkits. 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.
stiKnorItsaC
ledoM seireS golataC .oN .oNledoM
53-SSL 8730H53AC-SSL
04-SSL 8930H04AC-SSL

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
12
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.
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.
Touch-Up Paint (Black) Kit 90L73 FTPK-B
)mottoB&poT(stiKkrowllirG
ledoM seireS hsiniF.oNgolataC.oNledoM
53-SSL kcalB dloG lekciN
9730H 0830H 1830H 53BG-SSL 53GG-SSL 53NG-SSL
04-SSL kcalB dloG lekciN
9930H 0040H 4040H 04BG-SSL 04GG-SSL 04NG-SSL
35" Screen Panel Kit H5059 SPKLSS-35
40" Screen Panel Lit H5060 SPKLSS-40
Spectra Screen Panel Kit
These screen panels can be installed on the
glassenclosure paneltoprevent directcon-
tact with the hot glass surface. The screen
panel kits cannot be used in conjunction
with any of the other door kits or door
frame kits.
ACCESSORY COMPONENTS CONTINUED

13
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
ACCESSORY COMPONENTS CONTINUED
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.
stiKecaFralugnatceR
ledoM seireS hsiniF.oNgolataC.oNledoM
53-SSL kcalB dloG lekciNdehsurB
6830H 7830H 9830H B53TP-SSL G53TP-SSL NB53TP-SSL
04-SSL kcalB dloG lekciNdehsurB
9040H 0140H 3140H B04TP-SSL G04TP-SSL NB04TP-SSL
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.
stiKecaFdehcrA
ledoM seireS hsiniF.oNgolataC.oNledoM
53-SSL kcalB dloG lekciNdehsurB
2830H 3830H 5830H B53AP-SSL G53AP-SSL NB53AP-SSL
04-SSL kcalB dloG lekciNdehsurB
5040H 6040H 8040H B04AP-SSL G04AP-SSL NB04AP-SSL

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
14
REPLACEMENT PARTS LIST
GAS CONTROLS
.oNNOITPIRCSED 53-SSL04-SSL
.oNtraP.ytQ.oNtraP.ytQ
.03-evlaVsaG saGlarutaN 1045M5311045M531
.03-evlaVsaG saGPL 1038M5311038M531
.13ylbmessAtoliP1025M5311025M531
.23rotareneGtoliP97J06297J062
.33ebuTtoliP1086L7611086L761
.43elbaCdnaedortcelE1078L7611078L761
.53rotcennoCelbixelF33K34133K341
.63rotingIozeiP1098M4211098M421
.oNNOITPIRCSED 53-SSL04-SSL
.oNtraP.ytQ.oNtraP.ytQ
.1)etelpmoC(tnorFssalG,erusolcnEN43529-BL1P43529-BL1
.2hctaL1012L9621012L962
.3)etelpmoC(teSgoL1016M5311026M531
.4ylbmessAraeRrenruB1077M5311087M531
.5tnorFrenruB1057M5311067M531
.6tekcarBrenruB31829-BL231829-BL2
.7tfeL-troppuSrenruBF11829-BL1G11829-BL1
.8thgiR-troppuSrenruBB11829-BL1C11829-BL1
.9elffaBtnorFB21829-BL1C21829-BL1
.01ylbmessAetarGB02829-BL1C02829-BL1
.11slenaPyrotcafeR68M14178M141
.21-renruBniaMraeR,ecifirO saG.taN 08J061 54696-BL1
.21-renruBniaMraeR,ecifirO saGPL 25L91195J881
.31-renruBniaMtnorF,ecifirO saG.taN 1009M5311066L931
.31-renruBniaMtnorF,ecifirO saGPL 1019M5311073L261
.41looWkcoRfogaB35L88135L881
.51renruBraeR-ebuTirutneV1073M5311083M531
.61renruBraeR-eniLsaGA43829-BL1B43829-BL1
.71renruBtnorF-eniLsaGA33829-BL1B33829-BL1
.81egakniLtnemtsujdArettuhSriA44529-BL144529-BL1
.91tekcarBgnitnuoMegakniL64529-BL164529-BL1
.02tekcarBtoliP07729-BL107729-BL1
.12lortnoCetomeRFR35M53135M531
.22droCrewoP1058M5311058M531
.32rewolB1048M5311048M531
.42poT,elffaBB22829-BL1C22829-BL1

15
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
REPLACEMENT PARTS
Gas Train Assembly - Bottom View
14
2
1
3
LSS40
4
5
6
15
7
8
9
10
11
12
13
6
16
17
18
19
20
21 22 23
30
32
33
34 35
LSS35
31
36
24

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
16
Printed in U.S.A. © 2002 by LENNOX
P/N 875,020M REV. C 05/2006
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.
1110 West Taft Avenue •Orange, CA 92865