Lennox Hearth Products B-Vent Elite LBV-3824EN User manual

1
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
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'autrevaperursouliquidesinflammables
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.
• Appeflez 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
installer, agence de service ou le fournisseur de gaz.
B-VENT ELITE®SERIES
B-VENTED GAS APPLIANCES
P/N 504,138M REV. H 03/2007
MODELS
HOMEOWNER'S CARE AND
OPERATION INSTRUCTIONS
Millivolt Models Electronic Models
LBV-3824MN LBV-3824EN
LBV-3824MP LBV-3824EP
LBV-3824MN-H LBV-3824EN-H
LBV-3824MP-H LBV-3824EP-H
LBV-4324MN LBV-4324EN
LBV-4324MP LBV-4324EP
LBV-4324MN-H LBV-4324EN-H
LBV-4324MP-H LBV-4324EP-H
OTL Report No. 116-F-18-05
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.

2NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
TABLE OF CONTENTS
Introduction..................................... page 2
General Information......................... page 2
Operation/Care of Your Appliance.... page 3
Damper & Combustion Air Controls page 4
Manual Limit Switch........................ page 5
Maintenance .................................... page 5
Burner Adjustments......................... page 5
Flame Appearance and Sooting ....... page 5
Maintenance Schedule..................... page 6
Adjustment ...................................... page 7
Millivolt Appliance Checkout............ page 7
Electronic Appliance Checkout......... page 7
Log and Rockwool Placement ......... page 7
Wiring Diagrams.............................. page 9
Warranty.......................................... page 9
Product Reference Information ....... page 9
Replacement Parts .......................... page 9
Lighting Instructions – Millivolt....... page 10
Lighting Instructions – Electronic.... page 12
Troubleshooting Guide – Millivolt ..... page 14
Troubleshooting Guide – Electronic .. page 15
Accessory Components................... page 16
Replacement Parts List..................... page 17
These appliances are designed to operate on
natural or propane gas only. The use of other
fuels or combination of fuels will degrade the
performance of this system and may be dan-
gerous.
Inputofappliancesare45,000and50,000BTU/
HR for LBV-3824 and LBV-4324 respectively.
CONGRATULATIONS!
In selecting this LENNOX B-vented gas appliance you have chosen the finest and most
dependable fireplace to be found anywhere. A beautiful, prestigious, alternative to a
woodburningfireplace. WelcometoaFamilyoftensofthousandsofsatisfiedLENNOX
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 millivolt appliances are designed to oper-
ateoneithernaturalorpropanegas.Amillivolt
gas control valve with piezo ignition system
provides safe, efficient operation.
The electronic appliances are designed to op-
erate on either natural or propane gas. An
electronic intermittent pilot system provides
safe, efficient operation. External electrical
power is required to operate these units.
GENERAL INFORMATION
Note: Installation and repair should be per-
formedbyaqualifiedserviceperson.Theappli-
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
airpassagewaysoftheappliancebekeptclean.
S'assurer que le brùleur et le compartiment
des commandes sont propres. Voir les in-
structions d'installation et d'utilisation qui
accompagnent l'apareil.
Provideadequateclearancesaroundairopen-
ings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front openings of the appliance.
Duetohightemperaturestheapplianceshould
be located out of traffic and away from furni-
ture and draperies. Locate furniture and win-
dow coverings accordingly.
Nominaloperatingpressures for themanifold
side of the gas control system are; 3.5 inches
water column (6.54 MmHg) for natural gas
models and 10 inches water column (18.69
MmHg) for propane gas models.
Do not use these appliances if any part has
beenunderwater.Immediatelycallaqualified,
professional service technician to inspect the
appliance and to replace any parts of the
control system and any gas control which
have been under water.
Nepasseservirdecetappareils'ilaétéplongé
dansl'eau,complètementouenpartie. Appeler
untechnicienqualifiépourinspecterl'appareil
etremplacertoutepartiedusystèmedecontrôle
et toute commande qui ont étéplongés dans
l'lau.
Millivolt appliances may be fitted at time of
manufacture with either a Honeywell millivolt
gascontrolvalveorasSITmillivoltgascontrol
valve. Both valves have been tested with and
approved for use with these appliances and
are listed accordingly.
Gas Orifice Size
Type Elevation
0 - 4500'
(0 - 1370 m)
0 - 4500'
(0 - 1370 m)
Natural Propane
#30 #47
#48
0.125
in.
LBV-3824
LBV-4324
TheseappliancescomplywithNationalSafety
Standards and are tested and listed by Omni-
Test Laboratories (Report No. 116-F-18-5) to
ANSI Z21.50b-2002 (in Canada, CSA-2.22b-
2002), and CAN/CGA-2.17-M91 in both USA
and Canada, as vented gas fireplaces.
Installation must conform to local codes. In
the absence of local codes, installation must
comply with the current National Fuel Gas
Code,ANSIZ223.1(NFPA54).(InCanada,the
currentCAN/CGAB149installationcode.) Elec-
tricalwiringmust complywithlocalcodes. In
the absence of local codes, installation must
be in accordance with the National Electrical
Code, NFPA 70 - (latest edition). (In Canada,
thecurrentCSAC22.1CanadianElectricCode.)
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: IMPROPERINSTALLATION,
ADJUSTMENT, ALTERATION, SERVICE
OR MAINTENANCE CAN CAUSE INJURY
OR PROPERTY DAMAGE. REFER TO
THIS MANUAL. FOR ASSISTANCE OR
ADDITIONAL INFORMATION CONSULT
A QUALIFIED INSTALLER, SERVICE
AGENCY OR THE GAS SUPPLIER.
WARNING: THESE FIREPLACES ARE
VENTED DECORATIVE GAS APPLI-
ANCES. DONOTBURNWOODOROTHER
MATERIAL IN THESE APPLIANCES.

3
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Test gage connections are provided on the
front of the millivolt gas control valves (identi-
fied OUT for the manifold side and IN for inlet
pressure side for both SIT and Honeywell
equipped appliances. A ¹⁄₈" NPT test gage
connection is provided on the electronic gas
control valve adjacent to the outlet to the main
burner.
Minimuminletgaspressuretotheapplianceis
5.0 inches water column (9.5 MmHg) for
naturalgasand11incheswatercolumn(20.55
MmHg) for propane for the purpose of input
adjustment.
Maximum inlet gas supply pressure to the
appliance is 10.5 inches water column (19.95
MmHg) for natural gas and 13.0 inches water
column (24.25 MmHg) for propane.
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
pressuresequaltoorlessthan¹⁄₂ psig(3.5kPa).
Theappliance and itsindividual shut-offvalve
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).
These appliances must not be connected to a
chimney or flue serving a separate solid fuel
burning appliance.
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 immediately. Turn off the gas supply to
the appliance and have it serviced by a
qualified professional, as it may not be op-
erating correctly.
OPERATION AND CARE OF YOUR
APPLIANCE
1. Appliance operation may be controlled
througharemotelylocatedoptionalwallswitch.
Separate switches may provide independent
control for the remote controlled fireplace op-
eration(optionalequipment). Inlieuofremote
or remote wall switch operation, the appliance
mustbeoperateddirectlythroughthecontrols
located on the front of the valve located within
the control compartment under the removable
refractory access panel, Figure 1 .
Figure 1
Operation of millivolt and electronic gas con-
trolsystemsaredifferent. Beforelightingand
operatingyourappliancedetermineifyouhave
a millivolt or electronic appliance. Refer to
Figure 1 to access the gas control compart-
ment below the lower refractory panel.
Refractory
Access Panel SIT Valve Shown
Gas Controls
On Valve
Millivolt appliances will be fitted with one of
the two gas control valves shown in Figure 2
on page 4 . Appliances with electronic sys-
tems will be fitted with the electronic valve
shown in Figure 3 on page 4 . Familiarize
yourself with the differing controls for the
valve your appliance uses.
To light millivolt appliances refer to the de-
tailed lighting instructions found in both En-
glish and French on pages 10 and 11 of these
instructions respectively. Millivolt and elec-
tronic appliance lighting instructions may
also be found on the pull out rating plate
located within the gas control compartment.
Referto
Figure 2 forthesparkignitorlocation
used with your appliance.
If your appliance is equipped with an optional
remote wall switch or remote control kit the
appliancemainburnermaybeturnedonandoff
with the wall switch or remote control. If the
applianceisnotequippedwithawallorremote
control,themainburnermustbeturnedoffand
on with the gas control knob. Turn the knob
counter-clockwise from the PILOT position to
ONtolightthemainburner,andclockwisefrom
ON to PILOT to turn off the main burner.
To light electronic appliances refer to the
detailed lighting instructions found in both
English and French on pages 12 and 13 of
these instructions respectively. Millivolt and
electronicappliancelightinginstructionsmay
also be found on the pull out rating plate
located within the gas control compartment.
If your appliance is equipped with an optional
remote wall switch or remote control kit the
appliance main burner may be turner on and
off with the wall switch or remote control. If
the appliance is not equipped with a wall
switch or remote control, the main burner
mustbeturnedoffandonwiththegascontrol
switch. Toggle the switch from ON to OFF to
operate the main burner from ON to OFF.
WARNING: FAILURE TO COMPLY WITH
THEINSTALLATIONANDOPERATINGIN-
STRUCTIONSPROVIDED IN THISDOCU-
MENT WILL RESULT IN AN IMPROP-
ERLY INSTALLED AND OPERATING AP-
PLIANCE, VOIDING ITS WARRANTY.
ANY CHANGE TO THIS APPLIANCE AND/
OR ITS OPERATING CONTROLS IS DAN-
GEROUS. IMPROPER INSTALLATION
ORUSEOFTHISAPPLIANCECANCAUSE
SERIOUSINJURYORDEATHFORMFIRE,
BURNS, EXPLOSION OR CARBON MON-
OXIDE POISONING.
WARNING: B-VENTAPPLIANCESARENOT
DESIGNED TO OPERATE IN NEGATIVELY
PRESSURED ENVIRONMENTS (PRES-
SURE WITHIN THE HOME IS LESS THAN
PRESSURES OUTSIDE). SIGNIFICANT
NEGATIVELY PRESSURED ENVIRON-
MENTS CAUSED BY WEATHER, HOME
DESIGN, OR OTHER DEVICES MAY IM-
PACT THE OPERATION OF THESE APPLI-
ANCES. NEGATIVE PRESSURES MAY
RESULT IN POOR FLAME APPEARANCE,
SOOTING, DAMAGE TO PROPERTY AND/
OR SEVERE PERSONAL INJURY. DO NOT
OPERATE THESE APPLIANCES IN NEGA-
TIVELY PRESSURED ENVIRONMENTS.
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 CLOTHING
OR OTHER FLAMMABLE MATERIALS
ON OR NEAR THIS APPLIANCE.
AVERTISSEMENT: SURVEILLER LES
ENFANTS. GARDER LES VÊTEMENTS,
LES MEUBLES, L'ESSENCE OU AUTRES
LIQUIDES ÀVAPEUR INFLAMMABLES
LIN DE L'APPAREIL.

4NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 5
CAUTION: DO NOT ATTEMPT TO TOUCH THE
DOORSWITHYOURHANDSWHILETHEFIRE-
PLACE IS IN USE. ALWAYS USE DOOR
HANDLES. DOORS WILL BECOME VERY HOT
WHEN FIREPLACE IS IN USE.
Figure 3
Figure 2
2. Whenlitforthefirsttime,thisappliancewill
emit a slight odor for an hour or two. This is
due to the “burn-in”of internal paints and
lubricantsusedinthemanufacturingprocess.
3. Keep lower control compartment clean by
vacuuming or brushing at least twice a year.
Morefrequentcleaningmayberequireddueto
excessivelintfromcarpeting,beddingmateri-
als, etc. It is important that control compart-
ments, burners and circulating air passage-
ways of the appliance be kept clean.
4. Always turn off gas to the pilot (millivolt
appliances) before cleaning. Before re-light-
ing, refer to the lighting instructions in this
manual. Instructions are also found on a pull-
outpanellocatedontheflooroftheappliance.
5. Always keep the appliance area clear and
freefromcombustiblematerials,gasolineand
other flammable liquids.
6. Remember,Millivolt applianceshave a con-
tinuous burning pilot flame. Exercise caution
whenusingproductswithcombustiblevapors.
7. Clean the optional glass doors only when
necessary. Wipe surface with clean, damp-
ened,softcloth. Follow withdry,soft towel as
desired. Take care not to scratch the glass
surface.
Figure 4
DAMPER AND OUTSIDE AIR CONTROLS
This appliance is fitted with a manually con-
trolled vent damper. The vent damper should
be closed when the appliance is not in use to
preventcoldairfromenteringthehomethrough
the venting system. The damper is controlled
throughtheuseofacontrolleverlocatedwithin
theapplianceopening at thetopcenter in front
ofthefireboxlintel
(see Figure 5 ) . Thecontrol
lever snaps into place at either extreme of its
range of motion. When locked in position all
thewaytothe right,thedamperisopen. When
locked in position all the way to the left, the
damper is closed.
The damper lever actuates a switch, (see wir-
ing diagram) which will prevent the appliance
main burner from lighting unless the damper
is locked open. The appliance flue damper
must always remain open when operating.
Spark Ignitor
SIT Millivolt Valve Gas Control Knob
O
N
O
F
F
P
I
L
O
T
Gas Control Knob
Spark Ignitor
Honeywell Millivolt Valve
IN OUT
TPTH TP TH
P
I
L
O
T
P
I
L
O
T
O
N
it
O
F
F
Fully Open or
Fully Closed
ON/OFF Switch
Electronic Gas
Control Valve
OFF
IN
PSI
ON
CONTROL
IGNITE
Outside Air
Actuator
Locked
Open
Locked
Closed
WARNING: DO NOT USE ABRASIVE
CLEANERS. NEVER CLEAN THE GLASS
WHEN IT IS HOT.
WARNING: FIREPLACES EQUIPPED
WITH OPTIONAL ACCESSORY DOORS
SHOULD BE OPERATED ONLY WITH
THE DOORS FULLY OPEN OR FULLY
CLOSED (FIGURE 4 ). THIS APPLI-
ANCE MAY ONLY BE FITTED WITH
DOORSCERTIFIEDFORUSE WITH THE
APPLIANCE.
AVERTISSEMENT:POURUTILISATION
UNIQUEMENT AVEC LES PORTES EN
VERRECERTIFIÊESAVEC L'APPAREIL.
WARNING: DAMPERMUST BE IN OPEN
POSITION WHEN APPLIANCE MAIN
BURNER IS OPERATING.
AVERTISSEMENT: LE REGISTRE DOIT
ÊTREENPOSITIONOUVERTE LORSQUE
LE OU LES BRULEURS PRINCIPAUX DE
L'APPEREIL FONCTIONNMENT.

5
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Many appliances are equipped when installed
withanoutside(make-upair)ventsystemthat
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
shouldnotbeoperatedifthecompletesystem
is not installed. Refer to
Figure 5 . When the
complete outside air vent system is installed,
the installer will remove the cover from the
shut-off lever located in the left side of the
firebox opening.
If your cover is not removed and you have
reason to believe that you have a complete
outsideairsystem,contactyourdistributorto
have your appliance inspected for the pres-
enceofthecompletesystem. DONOTassume
that you have this system in place.
Thehandoperatedshut-offleverislocatedinthe
left side of the fireplace opening behind the
screen. Toopen,pullalltheway. Theoutsideair
damper should be fully open when the fireplace
is in use and completely closed when the fire-
placeisnotbeingused. Thiswillpreventoutside
cold air from entering the dwelling.
Burner Adjustments
Flame Appearance and Sooting
Proper flame appearance is a matter of taste.
Generallymostpeoplepreferthewarmglowof
a yellow to orange flame. Appliances operated
with air shutter openings that are too large, or
with long vertical vent runs, will exhibit flames
thatareblueandtransparent.Theseweak,blue
and transparent flames are termed anemic.
If the air shutter opening is too small sooting
may develop. Sooting is indicated by black
puffsdevelopingatthetipsofverylongorange
flames.Sootingresultsinblackdepositsform-
ing on the logs, appliance inside surfaces and
onexterior surfacesadjacenttotheventtermi-
nation. Sooting is caused by incomplete com-
bustioninthe flames andalack of combustion
air entering the air shutter opening.
Toachieveawarmyellowtoorangeflamewith
an orange body that does not soot, the shutter
opening must be adjusted between these two
extremes.
No smoke or soot should be present. Reposi-
tionthelogsetiftheflames impinge on any of
them.
If sooting conditions exist, the air shutter
opening on the main burner can be adjusted.
Normally,themoreoffsetsintheventsystem,
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,theflamegoesout(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 21 ).
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 qualified service techni-
cian. Propermaintenanceandusewillrequire
morefrequent,lessextensiveinspectionsand
servicing by the homeowner.
Generally, annual inspections should be per-
formedbyaqualifiedservicetechnician. More
frequent periodic inspections and cleanings
shouldbeperformed by thehomeowner. Any
discrepancies discovered by the homeowner
should result in a call to a qualified service
technician to effect the repair or correction.
Refertothemaintenancescheduleformainte-
nance tasks, procedures, periodicity and by
whom they should be performed.
IMPORTANT: TURNOFFGASANDANYELEC-
TRICAL POWER BEFORE SERVICING THE
APPLIANCE.
Figure 6
Manual Reset
Limit Switch
Lintel
Extension Right Side
Refractory Panel
Reset
Button
Wire
Terminals
Detail A
WARNING: DO NOT OPERATE THE
SHUTOFF LEVER UNLESS A COMPLETE
OUTSIDE AIR VENT SYSTEM HAS BEEN
INSTALLED WITH YOUR APPLIANCE.
WARNING:AIRSHUTTERADJUSTMENT
SHOULD ONLY BE PERFORMED BY A
QUALIFIED PROFESSIONAL SERVICE
TECHNICIAN.

6NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Periodically (After the Burning Season)
Maintenance Task Accomplishing Person Procedure
Cleaning Firebox Interior
Check Flame Patterns and Flame Height
Checking Vent System
Cleaning Optional Glass Doors
Homeowner
Homeowner
Homeowner
Homeowner
Carefullyremovelogs,Rockwoolandvolcanic
stone if used. Vacuum out interior of the
firebox. Clean firebox walls and log grate.
Replacelogs,Rockwoolandvolcanicstoneas
detailed in this manual.
Refer to Figure 8 on page 7 and verify the
flame pattern and height displayed by the
appliance conforms to the picture. Flames
must not impinge on the logs.
Inspect the vent system at the top and at the
base(withinthefirebox)forsignsofblockage
orobstruction. Lookfor any signsofdisloca-
tion of the vent components.
Clean as necessary following the directions
providedin thismanual. DO NOT TOUCH OR
ATTEMPT TO CLEAN DOORS WHILE THEY
ARE HOT.
Maintenance Schedule
Annually (Before the onset of the Burning Season)
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
Inspectvalve andensure itis properlyoperat-
ing. Check piping for leaks. Vacuum the
controlcompartment,fireplacelogsandburner
area.
Refer to
Figure 8 on page 7 and verify the
flame pattern and height displayed by the
appliance conforms to the picture. Flames
must not impinge on the logs.
Refer to Figure 9 on page 7. 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(withinthe firebox) forsignsofblockage
orobstruction. Look for anysigns of disloca-
tion of the vent components.
Perform the appropriate appliance checkout
procedure detailed in this manual.
Remove old ember materials and vacuum the
rockwoolplacementarea. Placenewrockwool
as described in this document.

7
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 9
Figure 8
³⁄₈" Min
(9 mm)
Hood
Pilot
Nozzels
Ignitor Rod
Proper Flame
Adjustment
Hot Surface
Igniter
Flame Rod
Ground
Electrode
3/8 To 1/2 Inch
(9 mm to 13 mm)
Pilot
Nozzle
MILLIVOLT
ELECTRONIC
Millivolt Appliance Checkout
Thepilotflameshould besteady,notlifting or
floating. Flame should be blue in color with
traces of orange at the outer edge.
Thetop³⁄₈"(9mm)atthepilotgenerator(thermo-
pile) should be engulfed in the pilot flame. The
flameshouldproject1"(25mm)beyondthehood
at all three ports
(Figure 9 - Millivolt section) .
Figure 7
Orifice
Air Shutter
Burner Tube
Adjusting
Set Screw
Factory Air
Models Shutter Setting
Inches (mm)
LBV-3824
Gas
Type
Natural 1/16" (1.59 mm)
Propane 3/16" (4.76 mm)
Natural Closed
Propane 1/4" (6.35 mm)
LBV-4324
Adjustment
Toadjust the flame, position the air shutter to
thenominal setting
(see Figure 7 ). Allow the
burner to operate for at least 30 minutes.
Observe the flame continuously.
If it appears weak or sooty as previously de-
scribed, adjust the air shutter open or closed
until desired effect is achieved.
Note: Iftheflamestillappearsanemicwiththeair
shutter closed all the way (usually a result of
lengthy vertical venting runs), turn off the appli-
ance,turnoffthegassupply,waitforthepartsto
cool and access the air shutter. The shutter is
prevented from actually closing by a tab that is
bentoverintotheopening.Removethisobstruc-
tionbybendingback.Reassembleandrestartthe
appliance and after 24 minutes reobserve the
flame. Adjust the air shutter as described.
Electronic Appliance Checkout
Light the burner, refer to the Lightilng Instruc-
tionsinthismanual. Ensuretheignitorlightsthe
pilot. Thepilotflameshouldengulftheflamerod
as shown in
Figure 9 - Electronic section.
Withpropercareandmaintenance,yourappli-
ance will provide many years of enjoyment. If
youshouldexperienceanyproblem,firstrefer
tothetroubleshootingguideinthismanual. If
problempersists,contactyourLennoxDealer.
Logs and Rockwool (Glowing Embers)
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.

8NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 10
Figure 12
Figure 11
a. b.
c.
e.
d.
7"
Step 3. Place the "C" shaped main log (b) in
position over the remaining log grate pin lo-
catedatthefarrightnearthefrontofthegrate.
Theleft end of the mainlog isto restupon the
"V" shaped front log with its back left edge
butted up against the rear log (c).
Step 4. Position the top log (d) over the pins
in the rear log and the main log. When prop-
erlyplaced,thetopwillhaveitscharredareato
the left and the stubbed end toward the front.
Step 5. Position the rear top log (e) in the
pocketformedovertheleftsideoftherearlog
(c). The split face of the rear top log (e) must
befacingforward, It'sleftendshouldbedown
fullyagainstthelograck,andthecrook(bend)
inthelogshouldbreakdirectlyovertheendof
the rear log.
When properly positioned the logs should
appear as illustrated in
Figures 11 and 12.
Logs must not impinge any of the flames.
The logs are packaged within the firebox.
The bag of rockwool is in the lower control
compartment. Remove the rockwool from
thepackagingandtearinto dime size pieces
( Figure 10 on page 8 ). Spread across the
burner evenly. Do not use more than is
necessary to cover the burner. When prop-
erly positioned, the rockwool will unevenly
coverapproximately85%ofthe burner with
no appreciable gaps.
These appliances are equipped with a beauti-
fullycraftedfive(5)piececeramicfiberlogset.
Thelogs,shownin Figure 11 on page 8 ,areto
be positioned precisely as shown. Any modi-
fication to the to the lay of these logs may
result in sooting, property damage and injury
or death.
Alllogsthatengagepinshavematingholesfor
pinengagementontheirbottomsides. DONOT
force a hole into a log by engaging the pins
where they are not intended to go. Apparent
minormis-alignmentofthepins and holescan
be eliminated by gently adjusting the position
ofthelogsuntilthepinsandholeseasilymate.
Step 1. Topositionthelogs,begin by placing
the rear log (c) in position over the two pins
locatedattherightcenterrearandrightrearof
the log grate (refer to Figure 11 ).
Step2. Position the front log (a) over the two
pinsfound near thefront left cornerof the log
grate. This log should be positioned with the
split"V" notch tothe frontwith the bulkierhalf
of the "V" to the left.
WARNING: IF USING THE OPTIONAL
EMBERKIT, DONOTPLACE ANYOFTHE
KIT COMPONENTS IN ANY LOCATION
WHERE THEY MAY IMPINGE ON THE
LOFTING FLAMES. GIVE CONSIDER-
ATION TO THE POTENTIAL OF LATER
INADVERTENTDISLOCATIONOFTHESE
ELEMENTS AND ENSURE THEY ARE
PLACED WHERE THEY MAY NOT FALL
OR ROLL INTO AN IMPINGING LOCA-
TION. FLAME IMPINGEMENT WILL RE-
SULT IN SOOTING AND MAY CAUSE
SERIOUS INJURY OR DEATH.
WARNING: THIS APPLIANCE IS NOT
MEANTTOBURNWOOD. ANYATTEMPT
TODO SO COULD CAUSEIRREPARABLE
DAMAGE TO YOUR APPLIANCE AND
PROVE HAZARDOUS TO YOUR SAFETY.
WARNING: THE SIZE AND POSITION OF
THE LOG SET WAS ENGINEERED TO
GIVE YOUR APPLIANCE A SAFE, RELI-
ABLE AND ATTRACTIVE FLAME PAT-
TERN. ANYATTEMPTTOUSEADIFFER-
ENT LOG SET IN THE FIREPLACE WILL
VOID THE WARRANTY AND WILL RE-
SULT IN INCOMPLETE COMBUSTION,
SOOTING, AND POOR FLAME QUALITY.

9
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
WIRING DIAGRAMS
Wiring diagrams are provided here for reference purposes only. This information is also provided on schematics attached directly to the appliance
on a pullout panel located within the control compartment. Two Millivolt wiring diagrams are provided here, one each for both Honeywell and SIT
equipped systems.
WARRANTY
Your gas appliance is covered by a limited
twenty year warranty. You will find a copy of
the warranty accompanying this manual.
Pleasereadthewarrantytobefamiliarwithits
coverage.
Retain this manual. File it with your other
documents for future reference.
REPLACEMENT PARTS
Acompletepartslistisfoundattheendofthis
manual. Use only parts supplied from the
manufacturer.
Normally, all parts should be ordered through
yourLennoxdistributor or dealer.Parts will be
shipped at prevailing prices at time of order.
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:
LENNOX HEARTH PRODUCTS
1110 West Taft Avenue
Orange, CA 92865
PRODUCT REFERENCE INFORMATION
Werecommend that you recordthefollowingimportantinformationaboutyourfireplace. Please
contactyourLennoxdealerforanyquestionsorconcerns. ForthenumberofyournearestLennox
dealer, please call 1-800-9-LENNOX.
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_________________________________________________
When ordering repair parts, always give the
following information:
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.
Thermopile
Damper
Switch
TH
TP
TH
TP
Honeywell Millivolt Wiring Diagram
If any of the original wire as supplied must be replaced, it
must be replaced with Type AWM 200°C –18 GA. wire.
TH
TPTH
TP
* For Wall Switch Attachment Only.
*
Limit
Switch
BK
WHT
BK
BK
BK
SIT Millivolt Wiring Diagram
* For Wall Switch Attachment Only.
If any of the original wire as supplied must be replaced, it
must be replaced with Type AWM 200°C –18 GA. wire.
Thermopile
TH
TP TH
TP
Limit
Switch
Damper Switch
BK
BK
BK
BK WHT
*
1. If any of the original wire as supplied must be replaced,
1. it must be replaced with Type AWM 200°C –18 GA. wire.
2. 120V, 60Hz –Less than 3 amps.
BK
Transf.
120 V.
24 V
Factory Wired Field Wired
BL
Electronic Wiring Diagram (Honeywell)
(Optional ON/OFF Switch Wiring)
R
BK
BL
OPT
FAN
LIMIT
SWITCH
W
Gas Valve
B
OPTIONAL
ON/OFF
SWITCH OR
WALL SWITCH
R
IGNITER
CONTROL
PILOT
ASSEMBLY
DAMPER
SWITCH
BK
BK
BK
BK
G
WT
Junction Box
White
Green
Red
Black
Neutral
Side of
Receptacle
Tab Intact
Green
Ground
Screw
Hot
Side of
Receptacle
Ta b
Broken
Optional
Accessory
Switch
120 VAC - Black
n
e
e
r
G-dn
u
o
r
Ge
ti
h
W
-
lar
t
u
e
N

10 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
LIGHTING INSTRUCTIONS –HONEYWELL AND SIT MILLIVOLT GAS VALVE
FOR YOUR SAFETY READ BEFORE LIGHTING
A. This appliance has a pilot which must be lighted with a piezo
ignitor. When lighting the pilot, follow these instructions
exactly.
B. BEFORE OPERATING smell all around the appliance area for
gas. Be sure to smell next to the floor because some gas is
heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
•Extinguish any open flame.
•Open windows.
•Do not light any appliance.
•Do not touch any electrical switches.
TO TURN OFF GAS TO APPLIANCE
1. Turn remote wall switch “OFF.”The pilot will remain lit for
normal service.
2. For complete shutdown, turn remote wall switch to “OFF.”
3. Access the lower control compartment.
4. Depress gas control knob slightly and turn clockwise
to “OFF.”Do not force.
5. Close lower control compartment.
LIGHTING INSTRUCTIONS
1. STOP! Read the safety information above on this page.
2. Access the lower control compartment.
3. Turn remote wall switch to “OFF.”
4. Verify main line shut-off valve is open.
5. Push in gas control knob slightly and turn clockwise
to “OFF.”
6. Wait five (5) minutes to clear out any gas. If you then smell gas,
STOP! Follow “B”in the safety information above on this page. If you
do not smell gas, go to the next step.
7. Push in gas control knob slightly and turn counterclockwise
to “PILOT.”
8. Push in control knob all the way and hold in. Immediately light the
pilot by triggering the spark ignitor (pushing the button) until pilot
lights. Continue to hold the control knob in for about 1 ¹⁄₂ minutes
after the pilot is lit. Release knob and it will pop back up. Pilot should
remain lit. If it goes out, repeat steps 5
through 8.
•If knob does not pop up when
released, stop and immediately call
your service technician or gas
supplier.
•If pilot will not stay lit after several
tries, turn the control knob to “OFF”
and call your service technician or
gas supplier.
9. Turn gas control knob counterclockwise to “ON.”
10. Close lower control compartment.
•Do not use any phone in your building.
•Immediately call your gas supplier from a neighbor’s phone.
•If your gas supplier cannot be reached, call the fire depart-
ment.
C. Use only your hand to push in or turn the gas control knob.
Never use tools. If the knob will not push in or turn by hand,
do not try to repair it, call a qualified service technician. Force
or attempted repair may result in a fire or an explosion.
D. Do not use this appliance if any part has been under water.
Immediately call a qualified service technician to inspect the
appliance and to replace any part of the control system and
any gas control which has been under water.
Note: Knob cannot be turned from “PILOT”to “OFF”
unless the knob is pushed in slightly. Do not force.
HONEYWELL
MILLIVOLT
GAS VALVE
SIT
MILLIVOLT
GAS VALVE
O
N
O
F
F
P
I
L
O
T
H
I
L
O
W
TPTH TP TH
P
I
L
O
T
P
I
L
O
T
O
N
it
O
F
F
OUT
IN
SIT
MILLIVOLT PILOT
WARNING: IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION
MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.

11
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
INSTRUCTIONS D’ALLUMAGE –VANNE GAZ MILLIVOLT HONEYWELL ET SIT
INSTRUCTIONS D'ALLUMAGE
8. Enfoncez le bouton de réglage jusqu’au fond et gardez-le enfoncé.
Allumez immédiatement la veilleuse en déclenchant l’allume-gaz à
étincelle (en poussant le bouton) jusqu’à ce que la veilleuse
s’enflamme. Continuez de tenir le bouton de réglage enfoncé
pendant environ 90 secondes après l’allumage de la veilleuse.
Relâchez le bouton et il sortira subitement. La veilleuse devrait
rester allumée. Si elle s’éteint, répétez les étapes 5 à8
inclusivement.
•Si le bouton ne sort pas automatiquement après avoir étérelâché,
arrêtez immédiatement et téléphonez àvotre technicien de service
ou àvotre fournisseur de gaz.
•Si la veilleuse refuse de rester
allumée après plusieurs tentatives,
tournez le bouton de réglage jusqu’à
sa position d’arrêt “OFF”et
téléphonez àvotre technicien de
service ou àvotre fournisseur de
gaz.
9. Tournez le bouton de réglage du gaz
en sens inverse des aiguilles d’une
montre jusqu’à sa
position de marche “ON”.
10. Fermez le compartiment de contrôle du bas.
11. Au besoin, rebrancher l’appareil au courant électrique et remettre
l’interrupteur du brûleur principal àla position “ON”ou régler le
thermostat àla température désirée.
12. Si l’appareil ne fonctionne pas, suivre les instructions intitulées
“Pour fermer le gaz qui alimente l’appareil”et appeler un
technicien ou le fournisseur de gaz.
POUR VOTRE SÉCURITÉ, LISEZ CES INSTRUCTIONS AVANT L’ALLUMAGE
A. Cet appareil est muni d’une veilleuse qui doit être allumée avec un
allumeur piézo-électrique. Lorsque vous allumez la veilleuse, suivre
exactement ces instructions.
B. AVANT L’ALLUMAGE: Assurez-vous que vous ne détectez aucune
odeurdegazautourdel’apareilainsiqueprèsdusol;certainsgaz,étant
plus lourds que l’air, descendent au niveau du sol.
VOICI CE QUE VOUS DEVEZ FAIRE SI VOUS DÉCELEZ UNE ODEUR
DE GAZ:
•Éteignez toute flamme visible.
•Ouvrez les fenêtres.
•N’allumez aucun appareil.
•Ne touchez àaucun commutateur électrique.
•Ne vous servez d’aucun téléphone dans votre édifice.
•Appelezimmédiatementvotrecompagniedegazenutilisantletéléphone
du voisin.
•S’ilvousestimpossibledecontactervotrecompagniedegaz,appelez
le service des incendies.
C. N’utilisez que votre main pour manipuler le bouton de réglage du gaz.
N’utilisez jamais d’outils. Si le bouton refuse de tourner ou de bouger,
n’essayez pas de le réparer. Communiquez immédiatement avec un
technicien de service qualifié. Toute tentative pour le forcer ou le
réparer, risquerait de provoquer un incendie ou une explosion.
D. Ne vous servez pas de cet appareil si l’un de ses éléments a été
immergédans l’eau. Appelez immédiatement un technicien compétent
pour faire inspecter l’appareil et remplacer toute pièce du système de
réglage ou commande du gaz qui a étésous l’eau.
1. ARRÊTEZ! Lisez les consignes de sécuritéau verso de cette plaque.
2. Ouvrez le compartiment de contrôle du bas.
3. Tournez l’interrupteur mural àla position d’arrêt “OFF”.
4. Assurez-vous que la soupape d’arrêt de la canalisation principale est
ouverte.
5. Enfoncez légèrement le bouton de réglage du gaz et tournez-le dans
le sens des aiguilles d’une montre jusqu’à la position
d’arrêt “OFF”.
Remarque: Il est impossible de tourner le bouton de “PILOT”à“OFF”à
moins qu’il ne soit légèrement enfoncé. Ne le forcez pas.
6. Attendez cinq (5) minutes pour l’evacuation du gaz. Si vous décelez
une odeur de gaz, ARRÊTEZ ! Retournez au point “B”des consignes
de sécuritéau verso de cette plaque. Si vous ne remarquez aucune
odeur de gaz, passez àl’étape suivante.
7. Enfoncez légèrement le bouton de réglage du gaz et tournez-le en
sens inverse des aiguilles d’une montre jusqu’à la position de
veilleuse “PILOT”.
1. Tournez l’interrupteur mural àla position d’arrêt “OFF”. La veilleuse
restera allumée jusqu’au retour du service normal.
2. Pour une fermeture complète, tournez l’interrupteur mural àla
position d’arrêt “OFF”.
3. Ouvrez le compartiment de contrôle du bas.
POUR FERMER LE GAZ QUI ALIMENTE L’APPAREIL
4. Enfoncez légèrement le bouton de réglage du gaz et tournez-le dans
le sens des aiguilles d’une montre jusqu’à la position
d’arrêt “OFF”. Ne forcez pas le bouton.
5. Fermez le compartiment de contrôle du bas.
VANNE GAZ
MILLIVOLT
HONEYWELL
VANNE GAZ
MILLIVOLT SIT
H
I
L
O
W
TPTH TP TH
P
I
L
O
T
P
I
L
O
T
O
N
it
O
F
F
OUT
IN
SIT
MILLIVOLT PILOT
O
N
O
F
F
P
I
L
O
T
AVERTISSEMENT : SI VOUS NE SUIVEZ PAS CES INSTRUCTIONS ÀLA LETTRE, IL POURRAIT S’EN SUIVRE UN INCENDIE OU UNE
EXPLOSION CAUSANT DES DOMMAGES MATÉRIELS, DES BLESSURES CORPORELLES OU MÊME DES PERTES DE VIE.

12 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
A. When lighting the appliance, follow these instructions
exactly.
B. BEFORE OPERATING smell all around the appliance area
for gas. Be sure to smell next to the floor because some
gas is heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
•Extinguish any open flame.
•Open windows.
•Do not light any appliance.
•Do not touch any electrical switches.
•Do not use any phone in your building.
FOR YOUR SAFETY READ BEFORE LIGHTING
•Immediately call your gas supplier from a neighbor’s
phone.
•If your gas supplier cannot be reached, call the fire
department.
C. Use only your hand to turn the gas control lever. Never
use tools. If the lever will not turn by hand, do not try to
repair it, call a qualified service technician. Force or
attempted repair may result in a fire or an explosion.
D. Do not use this appliance if any part has been under
water. Immediately call a qualified service technician to
inspect the appliance and to replace any part of the
control system and any gas control which has been
under water.
LIGHTING INSTRUCTIONS —ELECTRONIC
1. For complete shut-down, turn remote wall switch to
“OFF.”
2. Open lower control compartment door.
3. Turn the ON/OFF switch to “OFF”. Do not force.
4. Close the main line shut-off valve.
5. Close lower control compartment door.
TO TURN OFF GAS TO APPLIANCE
LIGHTING INSTRUCTIONS
1. STOP! Read the safety information above on this page.
2. Turn remote wall switch to “OFF.”
3. Open lower control compartment door.
4. Verify main line shut-off valve is open.
5. Turn the ON/OFF switch to “OFF”. Do not force.
6. Wait five (5) minutes to clear out any gas. If you then
smell gas, STOP! Follow “B”in the safety information
above on this page. If you do not smell gas, go to the
next step.
7. Turn the ON/OFF switch to “ON”. Do not force.
8. Turn “ON”all electrical power to appliance (remote wall
switch).
9. Close lower control compartment door.
TO SHUT OFF
1. Turn off all electrical power to the appliance (remote wall
switch).
ON/OFF Switch
OFF
IN
PSI
ON
CONTROL
IGNITER
Front View
WARNING: IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION
MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.

13
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
INSTRUCTIONS D’ALLUMAGE —ELECTRONIC
INSTRUCTIONS D’ALLUMAGE
POUR VOTRE SÉCURITÉ, LISEZ CES INSTRUCTIONS AVANT L’ALLUMAGE
A. Lorsquevousallumezl’appareil,suivezexactementcesinstruc-
tions.
B. AVANT L’ALLUMAGE: Assurez-vous que vous ne détectez
aucune odeur de gaz autour de l’apareil ainsi que près du sol;
certains gaz, étant plus lourds que l’air, descendent au niveau
du sol.
VOICI CE QUE VOUS DEVEZ FAIRE SI VOUS DÉCELEZ UNE
ODEUR DE GAZ
•Éteignez toute flamme visible.
•Ouvrez les fenêtres.
•N’allumez aucun appareil.
•Ne touchez àaucun commutateur électrique.
•Ne vous servez d’aucun téléphone dans votre édifice.
•Appelezimmédiatementvotrecompagniedegazenutilisant
le téléphone du voisin.
•S’il vous est impossible de contacter votre compagnie de
gaz, appelez le service des incendies.
C. N’utilisez que votre main pour manipuler linterrupteur “ON/
OFF”de la valve àgaz. N’utilisez jamais d’outils. Si
l’interrupteur ne bouge pas manuellement, n’essayez pas de le
réparer. Communiquez immèdiatement avec un technicien de
service qualifié. Toute tentative pour forcer l’interrupteur ou le
réparer, risquerait de provoquer un incendie ou une explosion.
D. Nevousservezpas decet appareilsi l’unde seséléments aété
immergédans l’eau. Appelez immédiatement un technicien
compétent pour faire inspecter l’appareil et remplacer toute
piècedusystèmederéglageoucommandedugazquiaétésous
l’eau.
1. ARRÊTEZ ! Lisez les consignes de sécuritéau verso de cette
plaque.
2. Tournez l’interrupteur mural àla position d’arrêt “OFF”.
3. Ouvrez la porte du compartiment de contrôle du bas.
4. Assurez-vousquelasoupaped’arrêtdelacanalisationprincipale
est ouverte.
5. Tournezlamanettederéglagedugazàlapositiond’arrêt“OFF”.
6. Attendez cinq (5) minutes pour l’evacuation du gaz. Si vous
décelezuneodeurdegaz ARRÊTEZ! Retournezaupoint“B”des
consignes de sécuritéau verso de cette plaque. Si vous ne
remarquez aucune odeur de gaz, passez àl’étape suivante.
7. Tournezlamanettederéglagedugazjusqu’àlapositiondemarche
“ON”. Ne la forcez pas.
8. Ouvrez le courant électrique (“ON”) qui alimente l’appareil
(interrupteur mural).
9. Fermez la porte du compartiment de contrôle du bas.
10. Au besoin, rebrancher l’apareil au courant électrique et
remettre l’interrupteur principal du brûleur àla position “ON”
ou régler le thermostat àla température désirée.
11. Si l’appareil ne se met pas en marche, suivre les instructions
intitulées “Pour fermer le gaz qui alimente l’appareil”et appeler
un technicien ou le fournisseur de gaz.
POUR ÉTEINDRE L’APPAREIL
1. Coupeztoutlecourantélectriquequialimentel’appareil(interrupteur
mural).
POUR FERMER LE GAZ QUI ALIMENTE L’APPAREIL
3. Tournezlamanettederéglagedugazàlapositiond’arrêt“OFF”.
Ne la forcez pas.
4. Fermez la soupape d’arrêt de la canalisation principale.
5. Fermez la porte du compartiment de contrôle du bas.
1. Pourunefermeturecomplète,tournezl’interrupteurmural àla
position d’arrêt “OFF”.
2. Ouvrez la porte du compartiment de contrôle du bas.
Interrupteur
ON/OFF
OFF
IN
PSI
ON
CONTROL
IGNITER
Vue de face
AVERTISSEMENT: SI VOUS NE SUIVEZ PAS CES INSTRUCTIONS ÀLA LETTRE, IL POURRAIT S’EN SUIVRE UN INCENDIE OU
UNE EXPLOSION CAUSANT DES DOMMAGES MATÉRIELS, DES BLESSURES CORPORELLES OU MÊME DES PERTES DE VIE.

14 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
TROUBLESHOOTING THE MILLIVOLT GAS CONTROL SYSTEM
Note: Before troubleshooting the gas control system, be sure external gas shut off valve (located at gas supply inlet) is in
the “ON”position.
Important: Valve system troubleshooting should only be accomplished by a qualified service technician.
1. Spark ignitor will not light
pilot after repeated
triggering of ignitor button.
2. Pilot will not stay lit after
carefully following the
lighting instructions.
3. Pilot burning, no gas to
burner, Valve knob “ON,”
Wall Switch “ON.”
4. Frequent pilot/burner outage
problem.
CORRECTIVE ACTIONSYMPTOM
A. Defective ignitor
(no spark at electrode).
B. Defective or misaligned electrode
at pilot (spark at electrode).
C. Gas supply pressure errant.
D. Pilot orifice plugged.
A. Defective pilot generator
(thermogenerator).
A. Damper closed or Damper Switch
defective.
B. Wall switch or wires defective.
C. Thermopile may not be generating
sufficient millivoltage.
D. Plugged burner orifice.
A. Pilot flame may be too low or
blowing (high) causing the pilot/
valve safety to drop out.
Check for spark at electrode and pilot; if no spark and
electrode wire is properly connected, replace ignitor.
Using a match, light pilot. If pilot lights, turn off pilot and
trigger the ignitor button again. If pilot lights, an improper
gas mixture caused the bad lighting and a longer purge
period is recommended. If pilot will not light –check gap at
electrode and pilot - should be ³⁄₈" to have a strong spark. If
gap measures ³⁄₈", replace pilot
(Figure 9 on page 7) .
Check inlet gas pressure. It should be within the limits as
marked on the rating plate.
Clean or replace pilot orifice.
Check pilot flame, it must impinge on thermogenerator
(Figure 9 on page 7) . Clean and/or adjust pilot for maxi-
mumflameimpingement on thermogenerator.Ensure that
theconnectionbetween the valve and thermogenerator are
tight and secure.
Ensure damper control lever is locked in the open position,
allthe way tothe right. If thedamper controllever is locked
in the open position troubleshoot through Steps B., C. and
D. below. If the main burner will still not light, determine if
the damper switch is defective and replace if necessary.
Checkwallswitchandwiresforproperconnections.Jumper
wire across terminals at wall switch, if burner comes on,
replace defective wall switch. If okay, jumper wires across
wall switch wires at valve, if burner comes on, wires are
faulty or connections are bad.
Check thermopile with millivolt meter. Take reading at ther-
mopile terminals of gas valve. Should read 325 millivolts
minimum with optional wall switch “OFF.”Replace faulty
thermopile if reading is below specified minimum.
Check burner orifice for stoppage and remove.
Cleanand/oradjustpilotflameformaximumflameimpinge-
ment on thermogenerator
(Figure 9 on page 7) .
POSSIBLE CAUSES

15
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
TROUBLESHOOTING THE ELECTRONIC IGNITION SYSTEM
N ote: Before troubleshooting, be sure that the appliance main line gas shut-off valve, the gas control valve and the wall switch are in
the “ON”position.
Important: Valve system troubleshooting should only be accomplished by a qualified service technician.
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
Ensure damper control lever is locked in the open position, all the way to the
right. If the damper control lever is locked in the open position troubleshoot
through Steps B., C. and D. below. If the main burner will still not light,
determine if the damper switch is defective and replace if necessary.
See Below.
Reset the limit switch button. If still not working, access the leads attached to
thelimit switchand check for continuity. If nocontinuity, replacelimit switch.
Disconnect the two black wires from the wire nuts. Test switch(s) for
continuity with a multimeter. If continuity is not indicated, switch(s) is
defective and must be replaced.
Note: Before replacing “OFF/ON”switch, be sure to check wiring for loose
connections or broken wires and repair as needed.
Check main burner orifice(s) for stoppage. Clean or replace.
Check vent system for obstructions.
A. Damper closed or
Damper Switch defective.
B. Faulty Valve System.
C. Faulty limit switch.
D. “OFF/ON”or wall switch
defective.
A. Burner orifice plugged.
B. Obstructed vent system.
1. Burner will not light.
2. Burners come “ON”but
go “OFF.”
•Turn Off Gas Supply
•Assure Valve Switch Is In ON Position
•Disconnect Control Harness
•Set Thermostat To Call For Heat
•Check For Proper Voltage At Control Harness
(See Insert A). Voltage Should Be 24V
Between Thermostat Or Pressure Switch
And 24V Common And 24V Hot.
•Line Voltage Power
•Low Voltage Transformer
•Limit Controller
•Thermostat
•Wiring
2
CHECK
START
NO
•Plug Control Harness Into Valve. Wait For
Internal Check Delay.
YES
•Igniter Warms Up And Glows Red. •With Pilot Burner Cable Connected, Measure
Voltage At Valve HSI Element Output. 24V
Nominal. (See Insert B)
NO
•Replace Igniter/Flame Rod Assembly.
YES
•Replace Valve.
NO
•Turn On Gas Supply. •Pilot Burner Lights. •Check That Pilot Gas Is Flowing. Wait To
Assure Plot Gas Tubing Is Purged. Recycle
Call For Heat If Necessary.
NO
YES
NO
YES
YES
1
•Measure Voltage Between 24V Hot And 24V Common
Leads To Valve Control. Must Measure At Least 19.5
VAC With Igniter Powered (See Insert A). To Identify
Proper Lead, This Check Must Be Done With The
Valve Control Connected And Igniter Powered.
•Check Transformer And
Line Volt Supply.
NO
•Replace Pilot Assembly.
YES
•Check That Pilot Flame Makes Good Contact With
Pilot Burner Flame Rod.
•Check For Good Electrical Connection Through The
Pilot Tubing.
•If Both Of The Above Are Good, Replace Igniter/Flame
Rod Assembly.
•Cycle Thermostat Off And Back On.
YES
•Main Valve Opens And Main Burner Lights. NO
YES
•System Is Okay.
YES
•Main Burner Lights. NO
2
1
Igniter Will Cycle Off And Back On Once During
The 90 Second Ignition Trial. All Voltage
Measurements Must Be Taken While The Igniter
Is Powered.
When Measured Voltage At Connections, Use
Care To Assure Terminals Are Not Damaged.
•Replace Valve.
•Replace Valve.
24 Volt Hot
End View Of
Control Harness
Connector
24 Volt
Common
24 Volt
Switched
Check For Damaged Or Missing Terminals
In Connector
Insert A
Igniter Terminals
Insert B
2
1

16 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Twelve Piece Ember Kit
A twelve piece ember kit (model FPCK) has
beendevelopedtoprovideameansofenhanc-
ingthe already impressive log presentationof
this fireplace. This kit contains three (3) ce-
ramic fiber pine cones and nine (9) ceramic
fiberdebriswoodbits. Alltwelveelementswill
not be consumed in the flames and may be
placed within the presentation area (without
impinging any of the lofting flames) to add
realism and enhance the rustic look and ap-
peal of the fire.
Pine Cones and
Wood Bits 91L05 FPCK
Remote Control System (Standard) H0249 RCL
ACCESSORY COMPONENTS
Touch-Up Paint Kit 90L73 FTPK-B
Touch-Up Paint Kit
Repairofminor scratchesanddiscoloration of
the appliance black painted surfaces may be
accomplished with the touch-up paint kit.
Standard Remote Control System
(Model RCL)
The Model RCL (Standard) Remote Control
System, features a simplistic on/off control
function for the fireplace. This model includes
ahand-heldtransmitter,aremotereceiverwith
wall-mount coverplate and all hardware re-
quired to install the unit. The remote receiver
can be wall or hearth mounted.
Thetransmitter has ON and OFF functions that
are activated by pressing either button on the
face of the transmitter. When a button on the
transmitterispressed,asignallightilluminates
briefly to verify that a signal has been sent.
The Model RCL is designed to operate with all
millivoltignition systems, aswell as electronic
ignition systems. It may be installed with use
for either natural or propane gas appliances.
The RCL offers ease of installation and allows
you to execute on-off commands to the fire-
place effortlessly with one simple motion.
The Model RCL comes complete with detailed
operating instructions.
Decorative Volcanic Stone 80L42 FDVS
Bag of Glowing Embers 88L53 FGE
Decorative Volcanic Stone
The decorative volcanic stone, Model FDVS,
can be used to enhance the look of your appli-
ance. Spread the decorative volcanic stone
evenly around the bottom of the firebox.
Bag of Glowing Embers
Replacementember materialsare available for
use with these appliances. Order a bag of
Glowing Embers, Model FGE to replace ember
materialsaspartoftheperiodicmaintenanceof
the appliance.
12M20 38LBF
12M21 38LBF-BB
12M22 38LBF-BS
12M23 43LBF
12M24 43LBF-BB
Bi-Fold Doors 12M25 43LBF-BS
Bi-Fold Doors
Your appliance can be fitted with beautiful bi-
fold doors. Model 38/43LBF doors are avail-
able for use with these appliances. Doors are
easily fitted to the fireplace opening. Model
38/43LBF doors come with standard black
finish. Model38/43LBF-BBdoorshaveabeau-
tiful bright brass finish. Model 38/43LBF-BS
doors are made of brushed stainless steel.
To ensure warranty and to prevent a potential
fire hazard, do not use any other doors on
these appliances.

17
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
GAS CONTROLS —MILLIVOLT
Natural Propane
No. DESCRIPTION Part No. Qty. Part No. Qty.
*20. Gas Valve - SIT H165801 1 H165901 1
*21. Gas Valve - Honeywell ‡62L05 1 62L05 1
22. Piezo Igniter - SIT 10K8601 1 10K8601 1
23. Orifice, Standard 903881 1 903882 1
24. Pilot Assembly - SIT 62L1201 1 62L1301 1
25. Thermogenerator 60J7901 1 60J7901 1
26. Piezo Ignitor, Lead Wire - SIT 902564 1 902564 1
27. Damper Switch 94468 1 94468 1
28. Limit Switch H1614 1 H1614 1
29. Pilot Tube 74L5601 1 74L5601 1
* Appliances may be fitted at the factory with either a Honeywell or SIT Millivolt gas control valve.
‡Valve will need to be converted from Natural to Propane for propane units.
REPLACEMENT PARTS LIST —MILLIVOLT
LBV-3824 LBV-4324
No. DESCRIPTION Part No. Qty. Part No. Qty.
1. Gas Fireplace Assembly –– ––
2. Firescreen 93076 2 93075 2
3. Rod, Screen 19242 2 19241 2
4. Refractory, Side (Standard) 43061 2 43061 2
Refractory, Side (L) (Herringbone) 126841 1 126843 1
Refractory, Side (R) (Herringbone) 126842 1 126844 1
5. Refractory, Rear 43071 1 43072 1
Refractory, Rear (Herringbone) 126831 1 126832 1
6. Refractory Access Panel 77M76 1 LB-97550A 1
Refractory Access Panel (Herringbone) 77M81 1 126854 1
7. Refractory, Base (Left) 125031 1 125031 1
Refractory, Base (Left) (Herringbone) 126853 1 126853 1
8. Refractory, Base (Right) 125051 1 125051 1
Refractory, Base (Right) (Herringbone) 126855 1 126855 1
9. Log Set, Complete H1607 1 904224 1
a. Log, Front/Left N/A –N/A –
b. Log, Center N/A –N/A –
c. Log, Rear N/A –N/A –
d. Log, Top/Right N/A –N/A –
e. Log, Rear/Top N/A –N/A –
10. Log Grate 77M80 1 125121 1
11. Burner Assembly Complete 77M79 1 125081 1
12. Gasket, Venturi 900272 1 900272 1
13. Venturi Tube 77M78 1 77M78 1
14. Bag of Glowing Embers 88L53 1 88L53 1
15. B-Vent Connector LB-97577A 1 LB-97577A 1
16. Front Face 43091-BLK 1 LB-97352A 1

18 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
REPLACEMENT PARTS —MILLIVOLT
23
4
5
14
3
2
20
22
26
7
8
6
12
13
24
25
11
10
Standard
Refractorys
Shown
21
9
a.
c.
b.
d.
e.
29
1
27
28
15
16

19
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Natural Propane
No. DESCRIPTION Part No. Qty. Part No. Qty.
20. Gas Valve - Honeywell 62L1801 1 62L1901 1
21. Pilot Assembly, Honeywell 62L1401 1 62L1501 1
22. Transformer 42J3201 1 42J3201 1
23. Orifice, Standard 903881 1 903882 1
24. Damper Switch 94468 1 94468 1
25. Limit Switch H1614 1 H1614 1
26. Ignitor Assembly Replacement Kit 87L54 1 87L54 1
GAS CONTROLS —ELECTRONIC
REPLACEMENT PARTS LIST —ELECTRONIC
LBV-3824 LBV-4324
No. DESCRIPTION Part No. Qty. Part No. Qty.
1. Gas Fireplace Assembly –– ––
2. Firescreen 93076 2 93075 2
3. Rod, Screen 19242 2 19241 2
4. Refractory, Side (Standard) 43061 2 43061 2
Refractory, Side (L) (Herringbone) 126841 1 126843 1
Refractory, Side (R) (Herringbone) 126842 1 126844 1
5. Refractory, Rear 43071 1 43072 1
Refractory, Rear (Herringbone) 126831 1 126832 1
6. Refractory Access Panel 77M76 1 LB-97550A 1
Refractory Access Panel (Herringbone) 77M81 1 126854 1
7. Refractory, Base (Left) 125031 1 125031 1
Refractory, Base (Left) (Herringbone) 126853 1 126853 1
8. Refractory, Base (Right) 125051 1 125051 1
Refractory, Base (Right) (Herringbone) 126855 1 126855 1
9. Log Set, Complete H1607 1 904224 1
a. Log, Front/Left N/A –N/A –
b. Log, Center N/A –N/A –
c. Log, Rear N/A –N/A –
d. Log, Top/Right N/A –N/A –
e. Log, Rear/Top N/A –N/A –
10. Log Grate 77M80 1 125121 1
11. Burner Assembly Complete 77M79 1 125081 1
12. Gasket, Venturi 900272 1 900272 1
13. Venturi Tube 77M78 1 77M78 1
14. Bag of Glowing Embers 88L53 1 88L53 1
15. B-Vent Connector LB-97577A 1 LB-97577A 1
16. Front Face 43091-BLK 1 LB-97352A 1

20 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
REPLACEMENT PARTS —ELECTRONIC
Printed in U.S.A. © 2001 by Lennox Hearth Products
P/N 504,138M REV. H 03/2007
Lennox Hearth Products 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
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
23
4
5
14
3
2
7
8
6
10
11
12
13 22
Standard
Refractorys
Shown
20
21
26
9
a.
c.
b.
d.
e.
1
24
25
15
16