Lennox Hearth Products Merit LMBV-42RMN User manual

CARE AND OPERATION INSTRUCTIONS
MODELS
Millivolt Models
LMBV-42RMN
LMBV-42RMP
LMBV-42REN
3/22/2010
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
INSTALLATEUR: Laissez cette notice avec l'appareil.
CONSOMMATEUR: Conservez cette notice pour consul-
tation ultérieure.
WARNING: If the information in these instructions is
causing property damage, personal injury or death.
- Ne pas entreposer ni utilizer d’essence ni d’autres
de cet appareil ou de tout autre appareil.
- QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
• Ne pas tenter d’allumer d’appareil.
• Ne touchez à aucan interrupteur. Ne pas vous servir
des téléphones se trouvant dans le bâtiment où vous
trouvez.
• 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 des incindies.
- L’installation et l’entretien doivent être assurés par un
le fournisseur de gaz.
AVERTISSEMENT: Assurez-vous de bien suivre les
instructions données dans cette notice pour réduire
au minimum le risque d’incindie ou d’explosion ou
pour éviter tout dommage matériel, toute blessure
ou la mort.
This appliance may be installed in an aftermarket permanently located, manufactured home (USA only) or mobile
home, where not prohibited by local codes. This appliance is only for use with the type of gas indicated on the rating
WARNING
AVERTISSEMENT
UNE SURFACE VITRÉE CHAUDE PEUT
CAUSER DES BRÛLURES.
LAISSER REFROIDIR LA SURFACE
VITRÉE AVANT D'Y TOUCHER.
NE PERMETTEZ JAMAIS À UN ENFANT
DE TOUCHER LA SURFACE VITRÉE.
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN TO
TOUCH GLASS.
- and liquids in the vicinity of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
•
department.
- installer, service agency or the gas supplier.
Electronic Models
B-Vent Gas Fireplaces
42" LMBV Models
WH Report No. 3106807
P/N 875034M Rev. C 07/2010
This manual is one of a set of two supporting this product.
Refer to P/N 850040M for Installation Instructions.
This manual is available in French. Order P/N 506223-26.
Ce manuel est disponible en francais. Simplement en faire
la demande numéro de la pièce 506223-26.

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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
Gas Orifice
Type Size Elevation
0 - 4500'
(0 - 1370 m)
0 - 4500'
(0 - 1370 m)
Natural
Propane (0.065)
#37
(0.104)
TABLE OF CONTENTS
Introduction ......................................page 2
General Information..........................page 2
Operation/Care of Your Appliance .....page 3
Damper & Outside Air Controls.........page 4
Manual Limit Switch .........................page 5
Attaching "Safety-in-Operation"
Warnings............................ page 6
Maintenance......................................page 7
Millivolt Appliance Checkout.............page 7
Electronic Appliance Checkout..........page 7
Maintenance Schedule......................page 8
Log and Rockwool Placement...........page 9
Wiring Diagrams...............................page 10
Lighting Instructions – Millivolt ........page 11
Lighting Instructions – Electronic .....page 13
Troubleshooting Guide – Millivolt......page 15
Troubleshooting Guide – Electronic ..page 16
Warranty ...........................................page 17
Product Reference Information.........page 17
Replacement Parts............................page 17
Accessory Components ....................page 18
Replacement Parts List.....................page 19
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
dangerous.
Input of appliance is 30,000 BTU/HR.
CONGRATULATIONS!
In selecting this LENNOX B-vented gas appliance, you have chosen one of the finest
and most dependable fireplaces available. This gas fireplaces is 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 Care and
Operation Instructions included herein will help to ensure many years of dependable and
enjoyable service from your LENNOX product.
INTRODUCTION
Themillivoltappliancesare designedtooperate
on either natural or propane gas. A millivolt gas
controlvalvewithpiezoignitionsystemprovides
safe, efficient operation.
The electronic appliances are designed to
operate on either natural or propane gas. An
electronicintermittentignitionsystemprovides
safe, efficient operation. External electrical
power is required to operate these units.
GENERAL INFORMATION
Note: Installation and repair should be per-
formed by a qualified service person. The
appliance should be inspected annually by a
qualified professional service technician. More
frequent inspections and cleanings may be
required due to excessive lint from carpeting,
bedding material, etc. It is imperative that the
controlcompartment,burnersandcirculatingair
passage ways of the appliance be kept clean.
S'assurer que le brùleur et le compartiment des
commandes sont propres. Voir les instructions
d'installation et d'utilisation qui accompagnent
l'apareil.
Provide adequate clearances around air open-
ings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front openings of the appliance.
Due to high temperatures the appliance should
belocatedout of traffic and away from furniture
and draperies. Locate furniture and window
coverings accordingly.
Nominal operating pressures for the manifold
side of the gas control system are; 3.5 inches
watercolumn (0.87kPa)fornaturalgas models
and 10 inches water column (2.49 kPa) for
propane gas models.
These appliances comply with National Safety
Standardsand are tested andlistedby Warnock
Hersey (Report No. 3106807) to ANSI Z21.50,
latest edition (in Canada, CSA 2.22, latest edi-
tion),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
complywiththecurrentNationalFuelGasCode,
ANSI Z223.1 (NFPA 54). (In Canada, the current
CAN/CGA B149 installation code.) Electrical
wiring must comply with local codes. In the
absence of local codes, installation must be in
accordance with the National Electrical Code,
NFPA70-(latestedition).(InCanada,thecurrent
CSA C22.1 Canadian Electric Code.)
DO NOT ATTEMPT TO ALTER OR MODIFY
THE CONSTRUCTION OF THE APPLIANCE OR
ITS COMPONENTS. ANY MODIFICATION OR
ALTERATION MAY VOID THE WARRANTY,
CERTIFICATION AND LISTINGS OF THIS UNIT.
WARNING: THESE FIREPLACES ARE
VENTEDDECORATIVEGASAPPLIANCES.
DO NOT BURN WOOD OR OTHER MATE-
RIAL IN THESE APPLIANCES.
WARNING: IMPROPER INSTALLATION,
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: ELECTRONIC MODELS OF
THESE APPLIANCES ARE EQUIPPED
WITH A THREE-PRONG (GROUNDING)
PLUG UTILIZED IN CONNECTING THE
ELECTRONIC COMPONENTS TO THE
JUNCTION BOX IN THE LOWER COM-
PARTMENT. THIS GROUNDING PLUG
PROVIDES PROTECTION AGAINST
SHOCK HAZARD AND SHOULD BE
PLUGGED DIRECTLY INTO THE PROP-
ERLYGROUNDEDTHREE-PRONGRECEP-
TACLE. DO NOT CUT OR REMOVE THE
GROUNDING PRONG FROM THE PLUG.

3
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
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 operating
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
operation (optional equipment).
Figure 1
Operation of millivolt and electronic gas
control systems are different. Before lighting
and operating your appliance determine if you
have a millivolt or electronic appliance. Refer
to Figure 1 to access the gas control compart-
mentbelow the lowerrefractory panel. Millivolt
appliances will be fitted with one of the two gas
control valves shown in Figure 2. Appliances
with electronic systems will be fitted with the
electronic valve shown in Figure 3. Familiarize
yourself with the differing controls for the valve
your appliance uses.
To light millivolt appliances refer to the detailed
lighting instructions found in both English and
French on pages 10 and 11 of these instruc-
tions respectively. Millivolt and electronic
appliance lighting instructions may also be
foundonthe pulloutlabelsattachedtothegas
control valve located within the gas control
compartment. Refer to Figure 2 to locate the
appropriate location for the spark ignitor used
with your appliance.
If your appliance is equipped with an optional
remote wall switch or remote control kit the
appliance main burner may be turned on and
off with the wall switch or remote control. If the
appliance is not equipped with a wall or remote
control,the main burner must be turnedoff and
on with the gas control knob. Turn the knob
counter-clockwise from the PILOT position to
ONtolightthemainburner, and clockwise from
ON to PILOT to turn off the main burner.
WARNING: FAILURE TO COMPLY WITH
THE INSTALLATION AND OPERATING
INSTRUCTIONS PROVIDED IN THIS
DOCUMENT WILL RESULT IN AN IM-
PROPERLYINSTALLEDANDOPERATING
APPLIANCE, VOIDING ITS WARRANTY.
ANY CHANGE TO THIS APPLIANCE
AND/OR ITS OPERATING CONTROLS
IS DANGEROUS. IMPROPER INSTAL-
LATION OR USE OF THIS APPLIANCE
CANCAUSESERIOUSINJURYORDEATH
FORM FIRE, BURNS, EXPLOSION OR
CARBON MONOXIDE POISONING.
WARNING: B-VENT APPLIANCES ARE
NOT DESIGNED TO OPERATE IN NEGA-
TIVELY PRESSURED ENVIRONMENTS
(PRESSURE WITHIN THE HOME IS
LESS THAN PRESSURES OUTSIDE).
SIGNIFICANTNEGATIVELYPRESSURED
ENVIRONMENTSCAUSEDBYWEATHER,
HOME DESIGN, OR OTHER DEVICES
MAY IMPACT THE OPERATION OF
THESE APPLIANCES. NEGATIVE PRES-
SURES MAY RESULT IN POOR FLAME
APPEARANCE, SOOTING, DAMAGE TO
PROPERTYAND/ORSEVEREPERSONAL
INJURY. DO NOT OPERATE THESE AP-
PLIANCES IN NEGATIVELY PRESSURED
ENVIRONMENTS.
WARNING: CHILDREN AND ADULTS
SHOULDBEALERTEDTOTHEHAZARDS
OF HIGH SURFACE TEMPERATURES.
USE CAUTION AROUND THE APPLI-
ANCE TO AVOID BURNS OR CLOTHING
IGNITION. YOUNG CHILDREN SHOULD
BE CAREFULLY SUPERVISED WHEN
THEY ARE IN THE SAME ROOM AS THE
APPLIANCE.
WARNING: DO NOT PLACE CLOTHING
OROTHERFLAMMABLEMATERIALSON
OR NEAR THIS APPLIANCE.
AVERTISSEMENT: SURVEILLER LES
ENFANTS. GARDER LES VÊTEMENTS,
LES MEUBLES, L'ESSENCE OU AUTRES
LIQUIDES À VAPEUR INFLAMMABLES
LOIN DE L'APPAREIL.
Refractory
Access Panel
SIT Valve Shown
Gas Controls
on Valve
Piezo
Ignitor
In lieu of remote or remote wall switch opera-
tion, the appliance must be operated directly
through the controls located on the front of the
valve located within the control compartment
under the removable refractory access panel,
Figure 1.
Do not use these appliances if any part has
been under water. Immediately call a qualified,
professional service technician to inspect the
applianceand toreplaceany partsofthe control
system 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 un technicien qualié pour inspecter
l'appareil et remplacer toute partie du système
de contrôle et toute commande qui ont été
plongés dans l'leau.
Test gage connections are provided on the front
of the millivolt gas control valve (identified E
for the inlet and A for the manifold side. (See
Figure 2 ). A 1/8" NPT test gage connection
is provided at the inlet and manifold side of
the electronic gas control valve (See Figure 3 ).
Minimum inlet gas pressure to the appliance is
4.5 inches water column (1.24 kPa) for natural
gas and 11 inches water column (2.74 kPa) for
propane for the purpose of input adjustment.
Maximum inlet gas supply pressure to the ap-
pliance is 10.5 inches water column (2.62 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
manual shut-off valve) during any pressure
testing of the gas supply piping system at
test pressures equal to or less than 1/2 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).
These appliances must not be connected to a
chimney or flue serving a separate solid fuel
burning appliance.

4
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
CAUTION: DO NOT ATTEMPT TO TOUCH THE
DOORS WITH YOUR HANDS WHILE THE
FIREPLACE IS IN USE. ALWAYS USE DOOR
HANDLES. DOORS WILL BECOME VERY HOT
WHEN FIREPLACE IS IN USE.
CAUTION: NEVER OPERATE THIS APPLIANCE
WITHABROKENOR DAMAGEDGLASS DOOR.
REMOVE OR REPLACE ANY BROKEN GLASS
DOOR BEFORE OPERATING.
Figure 3
Figure 2
3. Keep lower control compartment clean by
vacuuming or brushing at least twice a year.
More frequent cleaning may be required due to
excessivelintfromcarpeting,beddingmaterials,
etc. It is important that control compartments,
burners and circulating air passageways of the
appliancebe keptcleanand clearofobstruction
of ventilating and combustion air.
4. Always turn off gas to the pilot (millivolt
appliances)before cleaning.Beforere-lighting,
refer to the lighting instructions in this manual.
Instructions are also found on a pull-out panel
located on the floor of the appliance.
5. Always keep the appliance area clear and
free from combustible materials, gasoline and
other flammable liquids.
6. Remember, Millivolt appliances have a
continuous burning pilot flame. Exercise cau-
tion when using products with combustible
vapors.
7. Clean the optional glass doors only when
necessary. Wipesurfacewithclean,dampened,
softcloth. Followwithdry,softtowelasdesired.
Take care not to scratch the glass surface.
Honeywell Electronic
Gas Valve
Figure 4
ON/OFF Switch
Electronic
Gas Control
Valve
OFF
I
PSI
ON
CONTROL
IGNITE
Manifold Presssure Port
Inlet
Pressure
Port
Fully Open or
Fully Closed
Tolightelectronicappliancesrefertothedetailed
lighting instructions found in both English and
French on pages 12 and 13 of these instruc-
tions respectively. Millivolt and electronic
appliance lighting instructions may also be
foundonthe pulloutlabelsattachedtothegas
control valve 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
remotecontrol, themainburnermustbe turned
off and on with the gas control switch. Toggle
the switch from ON to OFF to operate the main
burner from ON to OFF.
2. When lit for the first time, this appliance will
emit a slight odor for an hour or two. This is due
tothe“burn-in”ofinternalpaints andlubricants
used in the manufacturing process.
DAMPER AND COMBUSTION AIR CONTROLS
Thisapplianceisfittedwithamanuallycontrolled
ventdamper. Theventdampershouldbeclosed
when the appliance is not in use to prevent cold
air from entering the home through the venting
system. The damper is controlled through the
use of a control lever located within the appli-
ance opening at the top center in front of the
firebox lintel (see Figure 5 ).
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
DOORSFULLY OPENOR FULLYCLOSED
(FIGURE4). THISAPPLIANCEMAYONLY
BEFITTEDWITHDOORSCERTIFIEDFOR
USE WITH THE APPLIANCE.
AVERTISSEMENT: POUR UTILISATION
UNIQUEMENT AVEC LES PORTES EN
VERRE CERTIFIÊES AVEC L'APPAREIL.
E A
TPTH TP TH
P
I
L
O
T
P
I
L
O
T
O
N
it
O
F
F
SIT Millivolt Valve Gas Control
Knob
Piezo
Ignitor
WARNING: DO NOT STRIKE OR SLAM
SHUT OPTIONAL GLASS DOORS.
WARNING: REPLACE ANY SAFETY
SCREEN OR GUARD REMOVED FOR
SERVICING AN APPLIANCE PRIOR TO
OPERATING THE APPLIANCE.
WARNING: DO NOT ATTEMPT TO RE-
PAIR BROKEN GLASS COMPONENTS.
REPLACE ANY BROKEN DOORS ONLY
WITHCOMPLETEDOORKITS,OBTAINED
FROM LENNOX. REMOVE ANY BROKEN
GLASS PIECES BY VACUUMING THEM
OUT COMPLETELY.

5
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
Figure 5
Figure 6
Pulltheactuatorforwardtoopenthecombustion
air door, and push it back to close. To "lock" the
combustionairdoorclosed,ensuretheactuator
is pushed all the way back, then push the end
of the actuators to the right until the step in the
actuator moves behind the appliance front face
within the slotted opening.
MANUALLY-RESET BLOCKED FLUE SAFETY
SWITCH
Thisapplianceisequippedwithamanually-reset
blocked flue safety switch. Refer to Figure 7
for its location. If during appliance operation,
theflamegoesout(independentlyofthe burner
on/off wall switch), it may be due to the opera-
tion of this safety limit switch. First allow the
appliance to cool, then reset the safety switch
by pushing the red reset button on the back
of the switch.
CAUTION: THE ELECTRONIC APPLIANCE
SHOULDBETURNEDOFFBEFOREREMOVING
THE LIMIT SWITCH.
To access the safety limit switch reset button,
remove the screen rod and screen from the
right side of the fireplace. Unscrew two screws
and remove the limit switch with low voltage
wires attached. Push the reset button, then
reinstall the limit switch. Reinstall the screen
and rod. At this time turn the electronic appli-
ance back on.
The appliance should then relight and remain
lit. If this does not occur, turn off the appliance
and call a qualified service technician.
The control lever snaps into place at either
extreme of its range of motion. When locked
in position all the way to the right, the damper
is open. When locked in position all the way
to the left, the damper is closed.
Thedamper lever actuates a switch, (seewiring
diagram) which will prevent the appliance main
burnerfromlightingunlessthedamperislocked
open. The appliance flue damper must always
remain open when operating.
Remove Locking Screw
and “Pop” Actuator to the
Left Before Initial Use
Combustion Air
Actuator
Pull Forward to Open,
Push Back to Close
Many appliances are equipped when installed
with an outside (make-up) air vent system
that is designed to provide the appliance with
outside make-up air for combustion when in
operation. The actuator for the outside air
system is standard on all appliances but must
not be operated if the complete system is not
installed. RefertoFigure 6.Whenthecomplete
outside air vent system is installed, the installer
will remove the actuator locking screw.
If your screw is not removed and you have
reason to believe that you have a complete
outside air system, contact your distributor to
have your appliance inspected for the presence
of the complete system.
DO NOT assume that you have this system
in place because you have an actuating lever
present on your appliance front face.
C
A
G
Inside Chase
Back Wall of Chase/Enclosure
Including Finishing Materials
if any
Rough Framing Face (Unfinished Shown)
HH
Optional FOAK
Combustion Air Kit
Limit Switch Screws
Manual
Reset
Limit
Switch
Screen
Rod
Lintel Extension Right Side Refractory Panel
Screen
To provide outside combustion air to your
appliance while it is in operation, locate the
combustion air actuator along the right side
of the appliance opening (Figure 5 ).
To operate, push the end of the actuator to the
left as shown in Figure 6, until it "pops" free of
its "locked" position.
WARNING: DAMPER MUST BE IN OPEN
POSITION WHEN APPLIANCE MAIN
BURNER IS OPERATING.
AVERTISSEMENT: LE REGISTRE DOIT
ÊTRE EN POSITION OUVERTE LORSQUE
LE OU LES BRULEURS PRINCIPAUX DE
L'APPEREIL FONCTIONNMENT.
WARNING: DO NOT OPERATE THE
COMBUSTION AIR ACTUATOR UNLESS
A COMPLETE OUTSIDE AIR VENT SYS-
TEM HAS BEEN INSTALLED WITH YOUR
APPLIANCE.
Figure 7

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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
APPOSITION DES MISES EN GARDE RELATIVES
À LA SÉCURITÉ D’UTILISATION
Votre foyer a été livré avec des étiquettes de sécurité qui
doivent être collées à côté des dispositifs de contrôle
du foyer. Une étiquette de sécurité devrait être collée
sur la plaque de l’interrupteur contrôlant l’allumage du
foyer (voir Figure A) et, le cas échéant, sur le boîtier
de la télécommande (Figure B). Les mises en garde
auraient dû être collées au moment de l’installation
initiale du foyer. Si ce n’est pas le cas, prenez les
étiquettes adhésives multilingues fournies avec ces
instructions et procédez comme suit:
1. Repérez l’interrupteur qui contrôle le foyer (vériez
que l’interrupteur contrôle le fonctionnement du
foyer en le faisant basculer de Marche à Arrêt, et
vice-versa). Nettoyez soigneusement la plaque
murale de l’interrupteur pour éliminer la poussière
et les traces de graisse ou d’huile. Collez l’étiquette
sur la surface de la plaque de l’interrupteur mural
quicontrôlelefoyer(FigureA). Choisissezlalangue
qui est principalement parlée dans la résidence
du propriétaire.
2. Si une télécommande est utilisée pour contrôler
le foyer, nettoyez la soigneusement pour éliminer
la poussière et les traces de graisse ou d’huile.
Collez l’étiquette sur le boîtier de la télécommande
(Figure B). Choisissez la langue qui est principale-
ment parlée dans la résidence du propriétaire.
3. Si vous ne trouvez pas les étiquettes, veuillez
appeler Lennox Hearth Products ou votre distribu-
teur Lennox Hearth Products local pour recevoir
gratuitement des étiquettes supplémentaires.
Étiquettes de remplacement, n° cat. H8024
LENNOX HEARTH PRODUCTS
1-800-9-LENNOX
Remarque : Le texte anglais est rouge sur un support
transparent. Le texte français et espagnol est blanc
sur un support noir.
COLOCACIÓNDEADVERTENCIASDESEGURIDAD
EN OPERACIÓN
Su chimenea incluye etiquetas de instrucciones de
seguridadquedebencolocarseenelpuntodeoperación
y control de la chimenea. Se debe colocar una etiqueta
deinstruccionesdeseguridadenlaplacadelinterruptor
de pared desde el cual se enciende y se apaga la
chimenea(verlaFiguraA)yeneltransmisordecontrol
remoto(Figura B)siseusa.Lasadvertenciasyadeben
haberse colocado cuando se completó la instalación
inicial de la chimenea. Si no están colocadas en estos
lugares,encuentrelasetiquetasadhesivasmultilingües
proporcionadas con estas instrucciones y prosiga de
la siguiente manera:
1. Identifique el interruptor de pared que controla
la chimenea (verifique que el interruptor opera la
chimenea encendiéndola y apagándola). Limpie
bien la placa del interruptor de pared para quitar el
polvo y aceite. Pegue la etiqueta en la superficie de
la placa del interruptor que controla la chimenea
(Figura A).Seleccione el idioma que más se habla
en la casa.
2. Si se usa un control remoto para controlar la
chimenea, encuentre el transmisor y límpielo bien
para quitar el polvo y aceite. Pegue la etiqueta en la
superficie del transmisor (Figura B).Seleccione el
idioma que más se habla en la casa.
3. Sinopuedeencontrarlasetiquetas,sírvasellamara
LennoxHearthProductsoaldistribuidordeLennox
HearthProductsmáscercanopararecibiretiquetas
deinstruccionesdeseguridadadicionalesgratuitas.
Juego de etiquetas de repuesto - Nº de cat. H8024
LENNOX HEARTH PRODUCTS
1-800-9-LENNOX
Nota: La etiqueta en inglés es transparente con texto
rojo. Las etiquetas en francés y español son negras
con texto blanco.
ATTACHING SAFETY IN OPERATION WARNINGS
Yourfireplacehasbeenfurnishedwithsafetyinstruc-
tion labels that are to be affixed to the operation and
control point of the fireplace. A safety instruction
labelshouldbe affixedtothe wallswitchplate where
the fireplace is turned on and off (See Figure A)and
if used on the remote control handheld transmitter
(Figure B). The warnings should already have been
put in place when the fireplace initial set-up was
completed. If they are not affixed at these spots,
locate the multi-lingual adhesive labels provided
with these instructions and proceed as follows:
1. Locate the wall switch that controls the fireplace
(verify the switch operates the fireplace by turn-
ing it on and off). Clean the wall switch plate
thoroughlyto remove anydust and oils.Affixthe
label to the surface of the plate of the wall switch
that controls the fireplace (Figure A). Choose
the language primarily spoken in the home.
2. If a remote control is used to control the replace,
locate the transmitter and clean it thoroughly
to remove any dust and oils. Affix the label to
the surface of handheld transmitter (Figure B).
Choose the language primarily spoken in the
home.
3. If you are unable to locate the labels, please call
LennoxHearthProducts or your nearest Lennox
Hearth Products dealer to receive additional
safety instruction labels free of charge.
Cat. No. H8024 Replacement Label Kit
LENNOX HEARTH PRODUCTS
1-800-9-LENNOX
Note: English is red text on clear label. French and
Spanish are white text on black label.
HOMEOWNER’S INSTRUCTIONS - ATTACHING "SAFETY-IN-OPERATION" WARNINGS
Un foyer chaud peut causer
de graves brûlures
Ne laissez jamais un enfant
toucher à la vitre ou à toutes
autres parties du foyer
AVERTISSEMENT
Hot Fireplace Will Cause Severe Burns Never Allow Children to Touch Glass or other Fire- place Parts
WARNING
La chimenea caliente
causará quemaduras graves
Nunca permita que los niños
toquen el vidrio ni otras
partes de la chimenea
ADVERTENCIA
Figure A
Hot Fireplace Will Cause
Severe Burns
Never Allow Children to
Touch Glass or other Fire-
place Parts
WARNING
Figure B
SAFETY LABEL DIAGRAMS
Un foyer chaud peut causer
de graves brûlures
Ne laissez jamais un enfant
toucher à la vitre ou à toutes
autres parties du foyer
AVERTISSEMENT
DIAGRAMMES DES ÉTIQUETTES DE SÉCURITÉ DIAGRAMAS DE ETIQUETAS DE SEGURIDAD

7
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
Figure 9
Figure 8
Maintenance
The appliance and venting system should be
thoroughly inspected before initial use and at
least annually by a qualified service technician.
Proper maintenance and use will require more
frequent,lessextensiveinspectionsandservic-
ing by the homeowner.
Generally, annual inspections should be per-
formedbyaqualified servicetechnician. More
frequent periodic inspections and cleanings
should be performed by the homeowner. Any
discrepancies discovered by the homeowner
should result in a call to a qualified service
technician to effect the repair or correction.
Refer to the maintenance schedule for main-
tenance tasks, procedures, periodicity and by
whom they should be performed.
IMPORTANT: TURN OFF GAS AND ANY
ELECTRICAL POWER BEFORE SERVICING
THE APPLIANCE.
Millivolt Appliance Checkout
The pilot flame should be steady, not lifting
or floating. Flame should be blue in color with
traces of orange at the outer edge.
The top ³⁄₈" (9 mm) at the pilot generator (ther-
mopile) should be engulfed in the pilot flame.
The ame should project 1" (25 mm) beyond
the hood at all three ports (Figure 9 ).
Electronic Appliance Checkout
Light the burner, refer to the Lightilng Instruc-
tions in this manual. Ensure the ignitor lights
the pilot. The pilot flame should engulf the
flame rod as shown in Figure 9.
With proper care and maintenance, your appli-
ance will provide many years of enjoyment. If
you should experience any problem, first refer
to the trouble shooting guide in this manual.
If problem persists, contact your Superior
distributor.
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

8
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
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
Carefully remove logs, Rockwool and volcanic
stoneifused. Vacuumoutinteriorofthefirebox.
Clean firebox walls and log grate. Replace
logs, Rockwool and volcanic stone as detailed
in this manual.
Refer to Figure 8 and verify the flame pattern
andheightdisplayedbytheapplianceconforms
to the picture. Flames must not impinge on
the logs.
Inspect the vent system at the top and at the
base (within the firebox) for signs of blockage
orobstruction. Lookforanysignsofdislocation
of the vent components.
Clean as necessary following the directions
provided in this manual. 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
Inspect valve and ensure it is properly op-
erating. Check piping for leaks. Vacuum
the control compartment, fireplace logs and
burner area.
Refer to Figure 8 and verify the flame pattern
andheightdisplayedbytheapplianceconforms
to the picture. Flames must not impinge on
the logs.
RefertoFigure9. Removeanysurfacebuild-up
on pilot and burner assembly. Wipe the pilot
nozzles, ignitor/flame rod and hood. Ensure
the pilot flame engulfs the flame sensor as
shown.
Inspect the vent system at the top and at the
base (within the firebox) for signs of blockage
or obstruction. Look for any signs of disloca-
tion of the vent components.
Perform the appropriate appliance checkout
procedure detailed in this manual.
Remove old ember materials and vacuum the
screenedrockwoolplacementarea. Place new
rockwool as described in this document.

9
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
Figure 12
Properlogplacementiscritical to prevent soot-
ing. Carefully position the ceramic fiber logs
over the burner as described in the following
steps, and detailed in Figures 11 through 15.
Note:Logsshouldbeplacedin thegapsbetween
the flame peaks and should be positioned so
that at no time they impinge the flames.
Step 1. Remove the rockwool from the pack-
aging and tear into nickel size pieces. Spread
the rockwool evenly on top of the burner. Do
not use more than is necessary. The rockwool
should not cover the burner ports, as shown
in Figure 10.
Step 2. Place the hole at the bottom of the
Rear Log over the pin at the rear of the log
grate, as shown in Figure 11. The log should
rest against the back refractory.
Step 3. Place the Rear Top Log over the left
side of the Rear Log. Lay the log over the
top left corner of the Rear Log, as shown in
Figure 12. The log should rest against the
back refractory.
Figure 13
Logs and Rockwool Placement
Figure 14
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.
TURNOFFALLELECTRICITYTOTHEAP-
PLIANCE BEFORE YOU INSTALL GRATE
AND LOGS.
WARNING: THIS APPLIANCE IS NOT
MEANT TO BURN WOOD. ANY ATTEMPT
TO DO SO COULD CAUSE IRREPARABLE
DAMAGE TO YOUR APPLIANCE AND
PROVE HAZARDOUS TO YOUR SAFETY.
WARNING: THE SIZE AND POSITION ON
THELOGSETWASENGINEEREDTOGIVE
YOUR APPLIANCE A SAFE, RELIABLE
AND ATTRACTIVE FLAME PATTERN.
ANY ATTEMPT TO USE A DIFFERENT
LOG SET IN THE FIREPLACE WILL VOID
THE WARRANTY AND WILL RESULT IN
INCOMPLETECOMBUSTION,SOOTING,
AND POOR FLAME QUALITY.
Figure 11
Figure 15
Figure 10
Rear Log
Rear Top Log
Front Left Log
Front Right Log
Top Right Log
Rear Log
Step 4. Engage the bottom hole of the Front
Left Log with designated pin on the grate, and
align the bottom groove of the log over the far
left grate bar. See Figure 13.
Step5. EngagethebottomholeoftheFrontRight
Logwithdesignatedpinonthefarrightgratebar.
Align the groove on the bottom of the log over
the far right grate bar. See Figure 14.
Step 6. Engage the bottom hole of the Top
Right Log, over the pin on the Front Right Log.
Rest the upper portion of the log in the notch
of the Rear Log. See Figure 15.
Front Right Log Pin
Notch In Rear Log
Front Right Log Pin
Burner Ports
Rockwool
Rear Log Pin

10
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
WIRING DIAGRAMS
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
Junction Box
Transf.
120 V.
24 V
Factory Wired Field Wired
BL
Electronic Wiring Diagram (Honeywell)
(Optional ON/OFF Switch Wiring)
R
BK
BL
To Opposite Side
G
W
OPT. ACCESSORY
SWITCH
120
VAC.
BK
LIMIT
SWITCH
W
Gas Valve
B
BL
OPTIONAL
ON/OFF SWITCH
OR
WALL SWITCH
R
R
IGNITER
CONTROL PILOT
ASSEMBLY
Break
Off Tab
DAMPER
SWITCH
BK
BK
WHT BK
BK
Wiring diagrams are provided here for reference purposes only. This information is also provided on schematics found on pullout labels located
within the control compartment attached to the gas control valve. Electronic and Millivolt wiring diagrams are provided here.

11
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
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.”
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 re-
leased, 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.
6. Wait ve (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.
SIT
MILLIVOLT
GAS VALVE
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.

12
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
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’enamme. 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 à 8
inclusivement.
• Si le bouton ne sort pas automatiquement après avoir été relâché,
arrêtez immédiatement et téléphonez à votre technicien de service
ou à votre 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 télé-
phonez à votre technicien de service
ou à votre fournisseur de gaz.
9. Tournez le bouton de réglage du gaz
en sens inverse des aiguilles d’une
montre jusqu’à sa posi-
tion 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 à la position “ON” ou régler le
thermostat à la température désirée.
12. Si l’appareil ne fonctionne pas, suivre les instructions intitulées
“Pour fermer le gaz qui alimente l’appareil” et appeler un tech-
nicien 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. AVANTL’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 à aucun commutateur électrique.
• Ne vous servez d’aucun téléphone dans votre édice.
• Appelez immédiatement votre compagnie de gaz en utilisant le télé-
phone 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 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 qualié. 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
immergé dans 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 été sous l’eau.
1. ARRÊTEZ! Lisez les consignes de sécurité au verso de cette plaque.
2. Ouvrez le compartiment de contrôle du bas.
3. Tournez l’interrupteur mural à la 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 sécurité au verso de cette plaque. Si vous ne remarquez aucune
odeur de gaz, passez à l’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 veil-
leuse “PILOT”.
1. Tournez l’interrupteur mural à la position d’arrêt “OFF”. La veilleuse
restera allumée jusqu’au retour du service normal.
2. Pour une fermeture complète, tournez l’interrupteur mural à la posi-
tion 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 SIT
SIT
MILLIVOLT PILOT
AVERTISSEMENT : SI VOUS NE SUIVEZ PAS CES INSTRUCTIONS À LA LETTRE, IL POURRAIT S’EN SUIVRE UN INCENDIE OU
UNE EXPLOSION CAUSANT DES DOMMAGES MATÉRIELS, DES BLESSURES CORPORELLES OU MÊME DES PERTES DE VIE.
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

13
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
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 ve (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.

14
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
INSTRUCTIONS D’ALLUMAGE — ELECTRONIC
INSTRUCTIONS D’ALLUMAGE
POUR VOTRE SÉCURITÉ, LISEZ CES INSTRUCTIONS AVANT L’ALLUMAGE
A. Lorsquevousallumez l’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 à aucun commutateur électrique.
• Ne vous servez d’aucun téléphone dans votre édice.
• Appelez immédiatement votre compagnie de gaz en utilisant
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 à gaz. 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 qualié. Toute tentative pour forcer l’interrupteur 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 immergé dans 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 été
sous l’eau.
1. ARRÊTEZ ! Lisez les consignes de sécurité au verso de cette
plaque.
2. Tournez l’interrupteur mural à la position d’arrêt “OFF”.
3. Ouvrez la porte du compartiment de contrôle du bas.
4. Assurez-vousquelasoupaped’arrêtdelacanalisationprincipale
est ouverte.
5. Tournez la manette de réglage du gaz à la position d’arrêt “OFF”.
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 sécurité au verso de cette plaque. Si vous ne
remarquez aucune odeur de gaz, passez à l’étape suivante.
7. Tournez la manette de réglage du gaz jusqu’à la position de
marche “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 à la position “ON”
ou régler le thermostat à la température désirée.
11. Si l’appareil ne se met pas en marche, suivre les instruc-
tions intitulées “Pour fermer le gaz qui alimente l’appareil” et
appeler un technicien ou le fournisseur de gaz.
POUR ÉTEINDRE L’APPAREIL
1. Coupez tout le courant électrique qui alimente l’appareil (inter-
rupteur mural).
POUR FERMER LE GAZ QUI ALIMENTE L’APPAREIL
3. Tournez la manette de réglage du gaz à la position d’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. Pour une fermeture complète, tournez l’interrupteur mural à la
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: SIVOUSNE SUIVEZPASCESINSTRUCTIONS ÀLALETTRE, ILPOURRAITS’EN SUIVREUNINCENDIE OUUNE
EXPLOSION CAUSANT DES DOMMAGES MATÉRIELS, DES BLESSURES CORPORELLES OU MÊME DES PERTES DE VIE.

15
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
TROUBLESHOOTING THE MILLIVOLT GAS CONTROL SYSTEM
1. Spark ignitor will not light
pilot after repeated triggering
of ignitor button.
2. Pilot will not stay lit after
carefully following the light-
ing 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 (thermo-
generator).
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.
Checkforsparkatelectrodeandpilot;ifnosparkandelectrode
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 1/8" to have a strong spark.
If gap measures 1/8", replace pilot (Figure 9 ).
Check inlet gas pressure. It should be within the limits as
marked on the rating plate.
Clean or replace pilot orifice.
Checkpilotflame,itmustimpingeonthermogenerator(Figure
9).Cleanand/oradjustpilotformaximumflameimpingement
onthermogenerator.Ensurethat the connection between the
valve and thermogenerator are tight and secure.
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.
Check wall switch and wires for proper connections. 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.
Clean and/or adjust pilot flame for maximum flame impinge-
ment on thermogenerator (Figure 9 ).
POSSIBLE CAUSES
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.

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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
• 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
TROUBLESHOOTING THE ELECTRONIC IGNITION SYSTEM
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, deter-
mine if the damper switch is defective and replace if necessary.
See Below.
Resetthelimitswitchbutton. Ifstillnotworking,accesstheleadsattachedtothe
limit switch and check for continuity. If no continuity, replace limit switch.
Disconnect the two black wires from the wire nuts. Test switch(s) for continu-
ity 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.”
Note: 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” posi-
tion. Important: Valve system troubleshooting should only be accomplished by a qualified service technician.

17
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
WARRANTY
Yourgasapplianceiscoveredbyalimitedtwenty
year warranty. You will find a copy of the war-
ranty 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:
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.
If you encounter any problems or have any
questions concerning the installation or ap-
plication of this system, please contact your
distributor. For the name of your nearest
distributor contact:
Lennox Hearth Products
1508 Elm Hill Pike, Suite 108
Nashville, TN 37210
PRODUCT REFERENCE INFORMATION
We recommend that you record the following important information about your fireplace. Please
contact your Lennox dealer for any questions or concerns. For the number of your nearest Lennox
dealer, please call 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 ________________________________________________

18
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
Remote Control System (Standard) H0249 RCL
ACCESSORY COMPONENTS
Touch-Up Paint Kit 90L73 FTPK-B
Bi-Fold Doors:
Black trim 86L33 42 ABF
Bright Brass trim 86L34 42 ABF-BB
Brushed Stainless trim 86L35 42 ABF-BS
Bi-Fold Doors
Your appliance can be fitted with beautiful bi-
fold doors. Model ABF doors are available for
use with these appliances. Doors are easily
tted to the replace opening. Model 42 ABF
doors come with standard black finish. Model
42 ABF-BB doors have a beautiful bright brass
nish. Model 42 ABF-BS doors have a brushed
stainless finish.
Touch-Up Paint Kit
Repair of minor scratches and discoloration
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
a hand-held transmitter, a remote receiver with
wall-mountcoverplateandallhardwarerequired
to install the unit. The remote receiver can be
wall or hearth mounted.
The transmitter has ON and OFF functions that
are activated by pressing either button on the
face of the transmitter. When a button on the
transmitterispressed, a signal lightilluminates
briefly to verify that a signal has been sent.
The Model RCL is designed to operate with all
millivolt ignition systems, as well 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
youtoexecuteon-offcommandstothefireplace
effortlessly with one simple motion.
The Model RCL comes complete with detailed
operating instructions.
Decorative Volcanic Stone 80L42 FDVS
Bag of Rockwool 88L53 FGE
Decorative Volcanic Stone
Thedecorativevolcanicstone,ModelFDVS,can
be used to enhance the look of your appliance.
Spread the decorative volcanic stone evenly
around the bottom of the firebox.
Bag of Rockwool ("Glowing Embers")
The Bag of Rockwool, Model FGE, is used to
replace the "glowing ember" material as part
of the periodic maintenance for the appliance.
Twin Pane Doors
Your appliance can be fitted with beautiful twin
pane doors. Model TPA doors are available
for use with these appliances. Model TPA
doors are easily fitted to the fireplace opening.
Model 42 TPA-BB doors have a beautiful bright
brass finish.
Twin Pane Doors 86L36 42TPA-BB
Glass Enclosure Panels:
Black trim 27M32 42GEP
Bright Brass trim 27M33 42GEP-BB
Glass Enclosure Panels
(Bi-Fold "Look," Non-Operable Doors)
Your fireplace can be fitted with beautiful glass
enclosure panels with a bi-fold "look" (non-
operable doors once installed).
Model 42GEP is nished in black trim. Model
42GEP-BB model is nished in bright polished
brass trim.
Note: To ensure warranty coverage and to
prevent a potential fire hazard, do not use any
doors on these appliances other than those
specified herein.

19
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
REPLACEMENT PARTS LIST
Natural Gas Propane
No. DESCRIPTION Part No. Qty. Part No. Qty.
Gas Fireplace Assembly – – – –
1. Firescreen 36L99 2 36L99 2
2. Rod, Screen H3610 2 H3610 2
3. Refractory, Side 88L65 2 88L65 2
4. Refractory, Rear 88L64 1 88L64 1
5. Refractory Access Panel H3685 1 H3685 1
6. Refractory, Base (Left) H3664 1 H3664 1
7. Refractory, Base (Right) H3665 1 H3665 1
8. Log Set, Complete H5132 1 H5132 1
a. Log, Rear – 1 – 1
b. Log, Rear Top – 1 – 1
c. Log, Front Left – 1 – 1
d. Log, Top Right – 1 – 1
e. Log, Front Right – 1 – 1
9. Burner Assembly H5351 1 H5351 1
10. Burner Orice H5830 1 H5831 1
11. Bag of Rockwool 88L53 1 88L53 1
12. Limit Switch 75L23 1 75L23 1
13. Damper Switch 82L59 1 82L59 1
14. Flexible Gas Line And Valve 93L32 1 93L32 1
15. Grate Assembly H5352 1 H5352 1
GAS CONTROLS — ELECTRONIC
Natural Propane
No. DESCRIPTION Part No. Qty. Part No. Qty.
30. Gas Valve - Honeywell 62L18 1 62L19 1
31. Pilot Assembly (Honeywell) 62L14 1 62L15 1
32. Transformer 42J32 1 42J32 1
33. Ignitor Assembly (Kit) 87L54 1 87L54 1
GAS CONTROLS — MILLIVOLT
Natural Gas Propane
No. DESCRIPTION Part No. Qty. Part No. Qty.
20. Gas Valve - SIT H1658 1 H1659 1
21. Pilot Assembly (SIT) 62L12 1 62L13 1
22. Pilot Generator 60J79 1 60J79 1
23. Electrode And Cable 74L58 1 74L58 1
24. Piezo Ignitor 10K86 1 10K86 1
25. Ignition Cable H5047 1 H5047 1
26. Pilot Tube 74L56 1 74L56 1

20
LENNOX MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
REPLACEMENT PARTS
20
3
4
5
6
7
2
1
31
30
10
33
11
32
13
12
8
c.
b.
a.
d.
e.
23
21
REF
10
26
22
24 25
14
14
REF
9
15
Printed in U.S.A. © 2006 by Lennox Hearth Products
P/N 875034M REV. C 07/2010
Lennox Hearth Products reserves the right to make changes at any time, without notice, in design,
materials, specifications, and prices, and also to discontinue colors, styles, and products.
Consult your local distributor for fireplace code information.
1508 Elm Hill Pike, Suite 108 • Nashville, TN 37210