Lennox MLBV-35PM, MLBV-35NM User Manual

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P/N 506017-03 Rev. B 06/2011

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SAFETY

GUARD

PROTECTS AGAINST BURNS

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.

WARNING: If the information in these instructions is not followed exactly, a ﬁre or explosion may result, causing property damage, personal injury, or death.

WARNING /AVERTISSEMENT/AVISO

• HOT GLASS WILL CAUSE BURNS.

• DO NOT TOUCH GLASS UNTIL COOLED.

• NEVER ALLOW CHILDREN TO TOUCH GLASS.

• 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.

• EL VIDRIO CALIENTE CAUSARÁ QUEMADURAS.

• USTED DEBE NUNCA TOCAR EL VIDRIO CALIENTE.

• LOS NIÑOS DEBEN NUNCA TOCAR EL VIDRIO.

- Do not store or use gasoline or other flammable

vapors 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.

• If you cannot reach your gas supplier, call the fire

department.

- Installation and service must be performed by a qualified installer, service agency or the gas supplier.

- Ne pas entreposer ni utilizer d’essence ni d’autres vapeurs ou liquides inﬂammables dans le voisinage 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 installateur ou un service d’entretien qualiﬁé ou par le fournisseur de gaz.

This manual is one of a set of two supporting this product. Refer to P/N 506015-04 for Installation Instructions.

Ce manuel est disponible en francais, simplement en faire la demande. Numéro de la pièce 506223-22.

WHAT'S INSIDE

Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Safety and Your Fireplace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

FREE Safety Guard Offer (Protects Against Burns) . . . . . . . . . . . . . . . . . 2

Important Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Attaching the Safety-in-Operation Warnings . . . . . . . . . . . . . . . . . . . . . 5

[EN FRANÇAIS] L’information de sûreté importante . . . . . . . . . . . . . . . 3–4

Apposition des mises en garde relatives à la sécurité d’utilisation . . . . 5

[EN ESPAÑOL] Información importante de seguridad . . . . . . . . . . . . . . 3–4

Colocación de advertencias de seguridad en operación . . . . . . . . . . . . 5

CARE AND OPERATION INSTRUCTIONS

B-Vent Gas Fireplaces MLBV 35/40 Models

MODELS

MILLIVOLT:

MLBV-35NM MLBV-35PM

ITS Report No. 100017854

MLBV-40NM MLBV-40PM

ELECTRONIC:

MLBV-35NE MLBV-40NE

Wait...

DON’T THROW IT AWAY!

This manual contains

important operating

and safety

information.

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 consultation ultérieure.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

Thank you for your purchase. We appreciate your business!

Please carefully read and follow all instructions in this manual.

Pay special attention to all warnings and safety information.

Following these safety, care, and operation instructions will help

ensure many years of dependable and enjoyable service from your ﬁreplace.

•

FREE

severe burns and injuries by preventing direct contact

To receive your FREE SAFETY GUARD, call 1-800-786-7976

or visit www.lennox.com

SAFETY GUARD

The Lennox® SAFETY GUARD protects against

with the front glass surface of your ﬁreplace.

(Lennox Hearth Products / Owner Resources)

OFFER

TABLE OF CONTENTS

Safety and Your Fireplace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Important Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Attaching the Safety-in-Operation Warnings . . . . . . . . . . . . . . . . . . . . . . . . . 5

Appliance Installation, Service, and Maintenance Notices . . . . . . . . . . . . . . . . . 6

Appliance Operation Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

BTU Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Gas Pressure Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Oriﬁce Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Burn-In Period . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Operation/Care of Your Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Gas Controls / Control Compartment Access . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Appliance Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Lighting the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

ON/OFF Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Adjusting Flame Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Controls for Optional Outside Combustion Air Kit . . . . . . . . . . . . . . . . . . . . . . . 9

Maintenance Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Removing and Installing the Glass Enclosure Panel . . . . . . . . . . . . . . . . . . . . . 11

Installing Volcanic Stone, Glowing Embers (Rockwool), and Logs . . . . . . . . . 12

MLBV-35 Log Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

MLBV-40 Log Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Burner Air Shutter Adjustments:

Flame Appearance and Sooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Air Shutter Adjustment Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Burner Air Shutter Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Appliance Checkout:

Millivolt Appliance Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Electronic Appliance Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Spillage Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Manually-Reset Safety Limit Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Ordering Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Product Reference Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Unit Catalog Nos. / Shipping Wts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Accessory Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Lighting Instructions – Millivolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Lighting Instructions – Electronic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Troubleshooting Guide – Millivolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Troubleshooting Guide – Electronic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Safety and

Your Fireplace

All parts of your Lennox

•

Hearth Products ﬁreplace

get EXTREMELY HOT!

 To prevent severe burns and injuries, install

a screen or physical barrier to prevent direct contact with the glass.

To order a FREE Lennox® SAFETY GUARD for your ﬁreplace, see details at left.

 Follow the safety instructions below

and be sure everyone in your household understands this burn hazard:

•The surfaces on your ﬁreplace get EXTREMELY HOT!

•The glass on the front of the ﬁreplace reaches EXTREMELY HIGH temperatures and can cause severe burns if touched.

•Keep children away from an operating ﬁreplace. Closely supervise children in any room where a ﬁreplace is operating to prevent contact with glass.

•Keep clothing, furniture, gasoline, and other ﬂammable liquids away from the ﬁreplace.

•Even after the gas is turned off, ﬁreplace surfaces remain extremely hot.

 Be sure to attach the enclosed Safety-in-

Operation Warnings where you turn on your

replace, to help remind everyone of the

dangers associated with high temperatures (see Page 5).

 Read Important Safety Information on

Page 4.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

[FRENCH] [SPANISH]

La sécurité et

votre foyer

Toutes les parties de votre foyer

Lennox Hearth Products deviennent

EXTRÊMEMENT CHAUDES !

 Aﬁn d'éviter de vous brûler gravement ou de

vous blesser, installez une grille ou une barrière

physique pour empêcher tout contact direct avec la vitre.

Pour commander un PANNEAU DE PROTECTION Lennox® GRATUIT pour votre foyer, consultez les détails dans la partie gauche.

 Suivez les instructions de sécurité ci-dessous

et veillez à ce que tous les membres de votre famille soient conscients du danger de brûlure encouru :

•Les surfaces de votre foyer deviennent EXTRÊMEMENT CHAUDES !

•La vitre située à l'avant du foyer atteint des températures EXTRÊMEMENT ÉLEVÉES et peut causer de graves blessures en cas de contact.

•Tenez les enfants à l'écart du foyer lorsqu'il fonctionne. Surveillez attentivement les enfants dans les pièces où un foyer est utilisé aﬁn d'éviter qu'ils ne soient en contact avec la vitre.

•Tenez tous les vêtements, les meubles, l'essence et tout autre liquide inﬂammable à l'écart du foyer.

•Même après fermeture du gaz, les surfaces du foyer restent extrêmement chaudes.

Seguridad y

su chimenea

¡Todas las partes de la chimenea

Lennox Hearth Products se ponen

MUY CALIENTES!

 Instale una malla o barrera física para evitar

el contacto directo con el vidrio y prevenir las quemaduras y lesiones graves.

Ver los detalles a la izquierda para ordenar un Lennox® SAFETY GUARD GRATIS para su chimenea.

 Siga las instrucciones de seguridad a

continuación y asegúrese de que todos en su hogar sepan acerca de este peligro de quemadura:

•¡Las superﬁcies de la chimenea se ponen MUY CALIENTES!

•El vidrio delante de la chimenea alcanza temperaturas EXTREMADAMENTE ALTAS y puede causar quemaduras graves si se toca.

•Mantenga a los niños alejados de la chimenea en funcionamiento. Supervise en forma cercana a los niños en cualquier cuarto donde haya una chimenea funcionando para impedir el contacto con el vidrio.

•Mantenga la ropa, mobiliario, gasolina y otros líquidos inﬂamables alejados de la chimenea.

•Aún después de haber apagado el gas, las superﬁcies de la chimenea permanecen extremadamente calientes.

 Veillez à coller les Étiquettes de mise en garde

relatives à la sécurité d'utilisation à l'endroit

où vous utilisez le foyer, pour rappeler à tous les

utilisateurs les dangers liés aux températures élevées (voir Page 5).

 Lisez la section Informations importantes

relatives à la sécurité, Page 4.

 Asegúrese de colocar las Etiquetas de

advertencia de seguridad de operación en

el lugar donde enciende la chimenea, para que todos recuerden los peligros asociados con las altas temperaturas (ver la página 5).

 Lea la Información importante de seguridad

en la página 4.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

Important Safety Information

1. WARNING: Do not operate appliance with the glass front removed, cracked or broken. Replacement of the glass should be done by a licensed or qualiﬁed service person .

2. 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.

3. Due to high temperatures, the appliance should be located out of trafﬁc and away from furniture and draperies.

4. Children and adults should be alerted to the hazards of high surface temperature and should stay away to avoid burns or clothing ignition.

5. Clothing or other ﬂammable material should not be placed on or near the appliance.

6. Young children should be carefully supervised when they are in the same room as the appliance. Toddlers, young children, and others may be susceptible to accidental contact burns. A physical barrier is recommended if there are at-risk individuals in the house. To restrict access to a ﬁreplace or stove, install an adjustable safety gate to keep toddlers, young children, and other at-risk individuals out of the room and away from hot surfaces.

7. Any safety screen or guard removed for servicing an appliance must be replaced prior to operating the appliance.

8. Installation and repair should be done by a qualiﬁed service person. The appliance should be inspected before use and at least annually by a professional service person. More frequent cleaning may be required due to excessive lint from carpeting, bedding material, et cetera. It is imperative that control compartments, burners, and circulating air passageways of the appliance be kept clean. See maintenance instructions on Page 10.

L'information de sûreté importante

1. AVERTISSEMENT. Ne pas utiliser l’appareil si le panneau frontal en verre n’est pas en place, est craqué ou brisé. Conﬁez le remplacement du panneau à un technicien agréé

2. Ne pas utiliser cet appareil s’il a été plongé, même partiellement, dans l’eau. Appeler un technicien qualiﬁé pour inspecter l’appareil et remplacer toute partie du système de commande et toute commande qui a été plongée dans l’eau.

3. En raison des températures élevées, l’appareil devrait être installé dans un endroit où il y a peu de circulation et loin du mobilier et des tentures.

4. Les enfants et les adultes devraient être informés des dangers que posent les températures de surface élevées et se tenir à distance aﬁn d’éviter des brûlures ou que leurs vêtements ne s’enﬂamment.

5. On ne devrait pas placer de vêtements ni d’autres matières inﬂammables sur l’appareil ni à proximité.

6. Les jeunes enfants devraient être surveillés étroitement lorsqu’ils se trouvent dans la même pièce que l’appareil. Les tout petits, les jeunes enfants ou les adultes peuvent subir des brûlures s’ils viennent en contact avec la surface chaude. Il est recommandé d’installer une barrière physique si des personnes à risques habitent la maison. Pour empêcher l’accès à un foyer ou à un poêle, installez une barrière de sécurité ; cette mesure empêchera les tout petits, les jeunes enfants et toute autre personne à risque d’avoir accès à la pièce et aux surfaces chaudes.

7. Tout écran ou protecteur retiré pour permettre l’entretien de l’appareil doit être remis en place avant de mettre l’appareil en marche.

8. L’installation et la réparation devrait être conﬁées à un technicien qualiﬁé. L’appareil devrait faire l’objet d’une inspection par un technicien professionnel avant d’être utilisé et au moins une fois l’an par la suite. Des nettoyages plus fréquents peuvent être nécessaires si les tapis, la literie, et cetera produisent une quantité importante de poussière. Il est essentiel que les compartiments abritant les commandes, les brûleurs et les conduits de circulation d’air de l’appareil soient tenus propres. Voyez les instructions d’entretien à la Page 10.

[SPANISH]

Información importante de seguridad

1. ADVERTENCIA: No opere el artefacto con el frente de vidrio quitado, agrietado o roto. Un técnico de servicio licenciado o capacitado debe reemplazar el vidrio.

2. No use este artefacto si alguna de sus partes ha estado bajo agua. Llame de inmediato a un técnico de servicio caliﬁcado para que inspeccione el artefacto y reemplace cualquier parte del sistema de control y cualquier control de gas que haya estado bajo agua.

3. Debido a las altas temperaturas, el artefacto debe situarse fuera de las áreas de tráﬁco y lejos del mobiliario y cortinas.

4. Se debe alertar a los niños y adultos sobre los peligros de las altas temperaturas en la superﬁcie y que se mantengan alejados para evitar quemaduras o ignición de la ropa.

5. No debe colocarse ropa u otros materiales inﬂamables

sobre y cerca del artefacto.

6. Se debe supervisar de cerca a los niños cuando estén en el mismo cuarto que el artefacto. Los niños pequeños, los jóvenes y otras personas pueden ser susceptibles a quemaduras por contacto accidental. Se recomienda instalar una barrera física si hay personas en riesgo en la casa. Para restringir el acceso a una chimenea o estufa, instale una puerta de seguridad ajustable para mantener a los niños pequeños, jóvenes y otras personas en riesgo fuera del cuarto y lejos de las superﬁcies calientes.

7. Cualquier malla o resguardo de seguridad quitado para dar servicio a un artefacto, debe reinstalarse antes de operar el artefacto.

8. Una persona de servicio competente debe realizar la instalación y reparación. Una persona de servicio profesional debe inspeccionar el artefacto antes de usar al menos una vez por año. Se puede requerir limpieza más frecuente debido a la pelusa excesiva del alfombrado, del material de cobijas, etc. Es imprescindible mantener limpios los compartimientos de control, los quemadores y los pasajes de circulación del aire del artefacto. Ver las instrucciones de mantenimiento en la página 10.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

HOMEOWNER’S INSTRUCTIONS: ATTACHING “SAFETY-IN-OPERATION” WARNINGS

ATTACHING “SAFETY-IN-OPERATION” WARNINGS

Your ﬁreplace has been furnished with safety instruction labels that are to be afﬁxed to the operation and control point of the ﬁreplace. A safety instruction label should be afﬁxed to the wall switch plate 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 afxed 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 turning it on and off). Clean the wall switch plate thoroughly to remove any dust and oils. Afﬁx the 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 Lennox Hearth Products 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.

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 (vériﬁez 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 qui contrôle le foyer (Figure A). Choisissez la langue 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 distributeur 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.

COLOCACIÓN DE ADVERTENCIAS DE SEGURIDAD EN OPERACIÓN

Su chimenea incluye etiquetas de instrucciones de seguridad que deben colocarse en el punto de operación y control de la chimenea. Se debe colocar una etiqueta de instrucciones de seguridad en la placa del interruptor de pared desde el cual se enciende y se apaga la chimenea (ver la Figura A) y en el transmisor de control remoto (Figura B) si se usa. Las advertencias ya deben haberse colocado cuando se completó la instalación inicial de la chimenea. Si no están colocadas en estos

lugares, encuentre las etiquetas adhesivas multilingües

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. Si no puede encontrar las etiquetas, sírvase llamar a

Lennox Hearth Products o al distribuidor de Lennox Hearth Products más cercano para recibir etiquetas de instrucciones de seguridad adicionales gratuitas.

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.

SAFETY LABEL

DIAGRAMS

Figure A

DIAGRAMMES DES ÉTIQUETTES

DE SÉCURITÉ

Figure B

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

DIAGRAMAS DE ETIQUETAS

DE SEGURIDAD

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

Appliance Installation, Service, and Maintenance Notices

IMPORTANT: 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.

Only trim kit(s) supplied by the manufacturer shall be used in the installation of this appliance.

Draft relief openings must not be covered or blocked.

These appliances must not be connected to a chimney or ﬂue serving a separate solid fuel burning appliance.

Any change to this appliance and/or its operating controls is dangerous. Improper installation or use of this appliance can cause serious injury or death from ﬁre, burns, explosion or carbon monoxide poisoning.

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. Some people are more affected by carbon monoxide than others, including pregnant women, people with heart or lung disease or anemia, those under the inﬂuence of alcohol, and those at high altitudes.

Turn off gas and electrical power to the ﬁreplace and allow it to cool before cleaning or servicing the appliance.

Appliance Operation Notices

Do not operate appliance with the glass front removed, cracked, or broken.

These fireplaces are vented gas appliances. Do not burn wood or other material in these appliances.

This appliance is only for use with the type of gas indicated on rating plate. This appliance is not convertible for use with other gases, unless a certiﬁed kit is used.

These appliances are designed to operate on natural gas or propane gas only. The use of other fuels or combinations of fuels will degrade the performance of this system and may be dangerous.

Provide adequate clearances around air openings and adequate accessibility clearance for service and proper operation. Never obstruct the front openings of the appliance.

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 that has been under water.

These fireplaces are designed as supplemental heaters. Therefore, it is advisable to have an alternate primary heat source when installed in a dwelling.

WARNING

B-Vent appliances are not designed to operate in negatively pressured environments (pressure within the home is less than pressures outside). Signiﬁcant negatively pressured environments caused by weather, home design, or other devices may impact the operation of these appliances. Negative pressures may result in poor ﬂame appearance, sooting, damage to property and/or severe personal injury. Do not operate these appliances in negatively pressured environments.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Warranty Information

Your gas appliance is covered by a limited twenty-year warranty. You will ﬁnd a copy of the warranty accompanying this manual. Please read the warranty to be familiar with its coverage.

Retain this manual. File it with your other documents for future reference.

Failure to comply with the installation and operating instructions provided will result in an improperly installed and operating appliance, voiding its warranty.

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.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

GENERAL INFORMATION

The ﬁreplace models covered in this manual are B-vented decorative gas appliances designed for residential application.

Millivolt appliances have a millivolt gas control valve with piezo ignition system.

Electronic appliances have a battery backed-

up electronic intermittent pilot system. No external electrical power is required to operate these appliances; however, 120 VAC is recommended (see Installation Instructions).

These appliances comply with National Safety Standards and are tested and listed by ITS (Report No. 100017854) to ANSI Z21.50 (in

Canada, CSA-2.22) and to CAN/CGA-2.17-M91

in both USA and Canada (latest editions at time of manual publication) as vented gas ﬁreplaces.

Installation must conform to local codes, or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 (latest edition), or the Natural Gas and Propane Installation Code, CAN/CSA B149.1 (latest edition).

The appliance, when installed, must be electri-

cally grounded and wired in accordance with

local codes or, in the absence of local codes, with the USA National Electrical Code, ANSI/ NFPA 70 (latest edition) or, in Canada, the Canadian Electrical Code, CSA C22.1 (latest edition).

BTU Input

Millivolt and electronic models come standard

with a manually-modulated gas valve; ﬂame appearance and heat output can be controlled at the gas valve. The BTU inputs for these appliances are shown in Table 1.

Input (BTU/HR) Manually Modulated

Gas Valves (all models)

Models

MLBV-35

MLBV-40

Table 1

Gas Pressure Requirements

(All Models)

Gas pressure requirements are listed in Tables 2 and 3.

Test gauge connections are provided on the front of the gas control valve, identied IN for the inlet and OUT for the manifold side (see Figures 3 and 4).

Propane tanks are at pressures that will cause

damage to valve components. Verify that the

tanks have step-down regulators to reduce the

pressure to safe levels.

Input Rate (BTU / HR)

Nat. Gas Prop. Gas

17,000 high

13,000 low

22,000 high

17,000 low

17,000 high

14,000 low

20,000 high

15,500 low

Gas Pressure Requirements

(continued)

Inlet Gas Supply Pressure

(all models)

Fuel # Minimum Maximum

Natural Gas

Propane

Table 2

Manifold Gas Supply Pressure

Fuel # Low High

Natural

Gas

Propane

Table 3

4.5" WC

(1.12 kPa)

11.0" WC

(2.74 kPa)

(all models)

(Lo) 2.2" WC

(0.55 kPa)

(Lo) 6.3" WC

(1.57 kPa)

10.5" WC

(2.61 kPa)

13.0" WC

(3.23 kPa)

(Hi) 3.5" WC

(0.87 kPa)

(Hi) 10.0" WC

(2.49 kPa)

These appliances must be isolated from the gas supply piping system (by closing their 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).

These appliances and their individual shut-off valves must be disconnected from the gas supply piping system during any pressure testing of that system at pressures greater than 1/2

psig (3.5 kPa).

Burn-in Period

During the rst few res in this appliance,

there will be some odor due to the curing of the paint and burning off of lubricants used in the manufacturing process. Depending on your

use, the burn-in period may take a few hours

or a few days.

KEEP YOUR HOUSE WELL VENTILATED DURING THE BURN-IN PROCESS. THE ODOR AND HAZE EMITTED DURING THE BURN-IN PROCESS CAN BE QUITE NOTICEABLE AND MAY SET OFF A SMOKE DETECTOR.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Oriﬁce Sizes

(Sea Level to High Altitude – All Models)

These appliances are tested and approved for installation at elevations of 0–4500 feet (0–1372 meters) above sea level using the standard

burner orice sizes (marked with an asterisk

(*) in Table 4, below).

For elevations above 4500 feet, contact your

gas supplier or a qualiﬁed service technician.

Deration

At higher elevations, the amount of BTU fuel

value delivered must be reduced by either:

• using gas that has been derated by the gas company,

• changing the burner orice to a smaller size

as regulated by the local authorities having jurisdiction and by the (USA) National Fuel Gas

Code NFPA 54/ANSI Z223.1 - latest edition or, in Canada, the CAN/CSA-B149.1 codes - latest

edition.

Install the appliance according to the regulations

of the local authorities having jurisdiction and, in the USA, the National Fuel Gas Code NFPA 54 / ANSI Z223.1 - latest edition or, in Canada,

the CAN/CSA-B149.1 - latest edition.

NOTE: Flame appearance will diminish 4% per thousand feet of altitude.

Burner Oriﬁce Sizes

Elevation 0-4500 feet ( 0-1372 meters)

Model

Series

MLBV-35

MLBV-40

Table 4

Nat.Gas

drill size (inches)

#48 (0.076")*

H1236•

#43 (0.089")*

99K75•

Standard size installed at factory.

• Part /Catalog Number.

drill size (inches)

#56 (0.046")*

#55 (0.052")*

Propane

62L37•

19L52•

IMPORTANT NOTE!

A white ﬁlm may develop on the glass enclosure panel during the ﬁrst few ﬁres as part of the burn-in process.

The first few times you use the fireplace, clean the glass after each use (AFTER THE GLASS HAS COMPLETELY COOLED); otherwise, the white ﬁlm will bake onto the glass and become difficult to remove.

See “Clean Glass Enclosure Panel” on Page 10.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

Note: Millivolt system shown. Electronic system controls are similarly located.

OPERATION AND CARE OF YOUR APPLIANCE

WARNING

Young children should be carefully supervised when they are in the same room as the appliance. Toddlers, young children and others may be susceptible to accidental contact burns. A physical barrier is recommended if there are at risk individuals in the house. To restrict access to a ﬁreplace or stove, install an adjustable safety gate to keep toddlers, young children and other at risk individuals out of the room and away from hot surfaces.

AVERTISSEMENT

Les jeunes enfants devraient être surveillés étroitement lorsqu’ils se trouvent dans la même pièce que l’appareil. Les tout petits, les jeunes enfants ou les adultes peuvent subir des brûlures s’ils viennent en contact avec la surface chaude. Il est recommandé d’installer une barrière physique si des personnes à risques habitent la maison. Pour empêcher l’accès à un foyer ou à un poêle, installez une barrière de sécurité; cette mesure empêchera les tout petits, les jeunes enfants et toute autre personne à risque d’avoir accès à la pièce et aux surfaces chaudes.

GAS CONTROLS / CONTROL COMPARTMENT ACCESS

Fireplace gas controls are located in the lower control compartment under the ﬁrebox (see Figure 1). Remove the control compartment door to access the controls.

To remove the control compartment door:

Gently pull upward and forward on the door

panel; then slide the panel, rst to one side and then to the other, until the door tabs clear

both holes (see Figure 2).

To reinstall the control compartment door:

Insert one of the door panel side tabs into its corresponding hole in the control compartment opening (see Figure 2); then insert the other side tab. Lift upward on the door panel; then gently push the top edge forward and down

into the grooves in the brackets until it locks

into place.

(Continued on next Page)

Gas Flex Line

(Gas Shut-Off Valve is behind door latch; see DETAIL, below)

DETAIL:

Gas Shut-Off Valve

in ON position (gas line OPEN)

To shut OFF gas: Turn valve handle perpendicular (cross-wise) to gas line.

Figure 1

Gas Control

{

Valve

Optional

Unit-Mounted

ON/OFF Switch

(Millivolt

units only)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Piezo

Compartment

Spring

Door Latch

(one of two)

Lower Control

(shaded area)

Control Compartment Door Tab

Figure 2

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

PILOT

OUT

VENT

Port

Main Gas Control Knob

Gas Inlet

Terminals TPTH, TP and TH

Gas Outlet

Appliance Controls

Operation of millivolt and electronic gas control systems differs. Before lighting and

operating your appliance, determine whether you have a millivolt or electronic appliance,

and then familiarize yourself with the location of the Gas Control Valve and Gas Shut-Off Valve on your speciﬁc appliance.

• For general control location, see Figure 1.

• For MILLIVOLT appliances, see Figure 3

for a detailed illustration of the SIT Millivolt Gas Control Valve.

• For ELECTRONIC appliances, see Figure 4 for a detailed illustration of the Dexen Electronic Gas Control Valve.

Lighting the Appliance

• Detailed MILLIVOLT appliance lighting instructions are on Pages 22 and 23 and

also on the label attached to the gas control valve.

• Detailed ELECTRONIC appliance lighting instructions are on Pages 24 and 25 and also on the label attached to the

gas control valve. Also see “Lighting an Electronic Appliance During a Power Outage,” below.

LIGHTING AN ELECTRONIC APPLIANCE

DURING A POWER OUTAGE

1. Install (2) “D” batteries in battery holder.

2. Light the appliance according to the instructions on Page 24.

3. Operate the appliance normally.

4. After power is restored, remove the batteries.

Note: To prevent batteries from draining prematurely, do NOT install batteries until needed (e.g., during a power outage or if operating the appliance solely with batteries).

Inlet Pressure

OUT

Manifold Pressure Port

Variable Flame Height Adjustment

TPTH TP TH

ON/OFF Control

Available ON/OFF control options for both MILLIVOLT and ELECTRONIC models include a unit-mounted ON/OFF switch (shown in Figure

1), a wall switch, or a remote control system.

See the “Accessory Components” section in this manual for details.

Note: To prevent excessive resistance in burner circuit (which can cause burner operation problems), wire only one burner control switch to the valve.

Adjusting Flame Height

After lighting the appliance, rotate the Flame Height Adjustment Knob to adjust the ﬂame in

a variable range from “LOW” to “HI” (manual adjustment only; no remote options).

• For MILLIVOLT appliances, see Figure 3.

• For ELECTRONIC appliances, see Figure 4.

CONTROLS FOR OPTIONAL OUTSIDE COMBUSTION AIR KIT

An optional outside combustion air system may be used with these appliances to provide supplemental combustion air from outside the

home during appliance operation. If used, the outside combustion air kit must be installed

before the ﬁreplace is framed and enclosed in the ﬁnished wall.

The Outside Air Control Lever for this type of system is standard on all models (see Figure

5); however, do NOT operate the Outside Air Control Lever if the complete system is NOT installed.

When a complete outside supplemental com-

bustion air system is installed, the installer will

remove the securing screw from the control lever on the LEFT side of the ﬁreplace opening (see Figure 5).

If the securing screw has NOT been removed,

and you have reason to believe your ﬁreplace has a complete outside supplemental combus- tion air system, contact your dealer or distributor to have your appliance inspected.

Supply Gas Inlet

Pressure-Tap (Manifold)

Regulator Mounting Screw

Burner Stage Terminal

Gas

Outlet

To Burner

IMPORTANT: Do NOT assume your ﬁreplace has a complete supplemental combustion air system, and do NOT operate the Outside Air Control Lever unless you have veriﬁed with your dealer or distributor that a complete system is in place.

The hand-operated outside air control lever is located on the lower LEFT side of the ﬁreplace opening. See Figure 5.

To open the outside air shutter, open the bottom control access panel, reach into the control compartment, and pull the outside air control

lever all the way out. The outside air shutter should be fully open when the ﬁreplace is in use and completely closed when the ﬁreplace is not being used. Closing it when not in use will greatly reduce the amount of outside cold air entering the dwelling through the ﬁreplace.

Securing Screw Installed

Outside Air Control Lever pushed UP (Air Shutter CLOSED)

IMPORTANT: Do NOT move Air Control Lever if securing screw is installed (or if not sure it was removed).

Securing Screw Removed

Outside Air Control Lever pulled DOWN (Air Shutter OPEN)

Left Side of

Lower Control Compartment

Figure 5

SIT Millivolt Gas Control Valve

Figure 3

Pilot Gas Outlet

Dexen Electronic Gas Control Valve

Figure 4

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Pressure-Tap (Inlet)

Ground (TP)

Pilot Stage Terminal

Do not operate the shutoff lever unless a complete outside combustion air system has been installed with your appliance.

WARNING

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

MAINTENANCE INSTRUCTIONS

(See Maintenance Schedule, Page 26)

Refer to the maintenance schedule for maintenance

tasks, procedures, frequency, and by whom they

should be performed. Always verify proper operation of the appliance after servicing.

WARNING

Turn off gas and electrical power to the ﬁreplace and allow it to cool before cleaning or servicing the appliance.

CAUTION: Wear gloves and safety glasses for protection while performing required maintenance.

Verify proper operation after servicing.

S'assurer que l'appareil fonctionne adéquatement une fois l'entretien terminé.

Always turn off gas to the pilot (millivolt appliances) before cleaning.

Before relighting the ﬁreplace, refer to the lighting instructions in this manual. Instructions are also found on pull-out panels located below the glass enclosure panel, in the appliance control compartment.

Inspect Venting System

The appliance and venting system should be thoroughly inspected before initial use and at least annually by a qualiﬁed service technician (inspection should include ensuring that

exhaust or intake passages are unobstructed

and vent components are properly assembled and not damaged). Homeowner must contact

a qualiﬁed service technician at once if any abnormal condition is observed.

If the venting system is disassembled for any

reason, a qualied service technician should

follow vent installation instructions for proper reassembly and proper sealing of the venting

system components. However, more frequent

periodic inspections and cleanings should be performed by the homeowner.

Inspect Glass Gasket

Visually inspect the gasket on the backside of the glass enclosure panels. The gasket surface must be clean, free of irregularities

and seated ﬁrmly.

Clean Glass Enclosure Panel

(Refer to “Removing and Installaing the Glass Enclosure Panel” on Page 11).

Note: Clean glass after ﬁrst two weeks of operation (after burn-in period is over) and then only when necessary and ONLY WHEN THE APPLIANCE IS COOL. Wipe surface with clean, dampened, soft cloth. Follow with dry, soft towel as desired. Take care not to scratch the glass surface.

IMPORTANT: Do not use abrasive cleaners on glass. Never clean the glass when it is hot.

Clean the glass periodically, to remove any

buildup caused by the following:

• Filmy coating (during initial use after installation). Initial curing of the high temperature

paint and burning off of lubricants used in the manufacturing process may result in a ﬁlmy coating on the glass.

• Dusty or dirty buildup. It is normal for con- densation and fog to form on the inside of the glass when ﬁrst starting the appliance. This condensation and fog will usually

disappear within a few minutes; however, over time the moisture can cause lint, dust,

and other airborne particles to cling to the glass surface.

• White coating. A white coating may form on the glass as a result of impurities and minerals in the fuel.

It is recommended that the glass be cleaned

two or three times during each heating season,

depending on the circumstances. The following cleaning solutions are approved for use to clean the glass:

• Non-ammonia based household cleaner

• 50% white vinegar and 50% water

• Gas replace/stove glass cleaner

Clean Control Compartment

Keep control compartment clean by vacuuming

or brushing at least twice a year. More frequent

cleaning may be required due to excessive lint

from carpeting, bedding materials, etc. It is important that control compartments, burners

and circulating air passageways of the appli-

ance be kept clean.

Clean Logs and Burner

Carefully remove the logs.

Note: Use care when handling the logs, as they become quite fragile after curing.

Vacuum out any foreign matter (lint, carbon,

etc.) on the burner. Ensure the burner ports are “open.” Remove any carbon deposits from the

under side of the logs using a vacuum cleaner,

or a soft bristled brush (i.e. paint brush).

Note: Improper positioning of logs can create carbon buildup and will alter the performance of the appliance.

Order Replacement Logs

If the logs become damaged and need to be

replaced, use only the proper replacement logs

from the manufacturer (see Pages 13 and 14 for ordering information).

Reinstall Embers and Logs

Carefully follow placement instructions on Pages 12–14. All logs should ﬁt onto corresponding pins and/or log stoppers. This will ensure a proper ﬂame and safe combustion.

Inspect Wiring

Refer to wiring diagrams on Pages 18 and 19.

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

ATTENTION: Au moment de l'entretien des commandes, étiquetez tous les fils avant de les débrancher. Des erreurs de cáblage peuvent entraîner un fonctionnement inadéquat et dangereux.

Inspect and clean all wire connections. Ensure that there is no melting or damage. Inspection should include:

• Terminals at the Valve

• Optional Control Switch (Wall ON/OFF Switch, Unit-Mounted ON/OFF Switch, or

Remote ON/OFF Control System)

Inspect Burner Flame Appearance

Ensure that the burner ﬂame appearance resembles the ﬂame shown in Figures 11 and 12 and as described in “Flame Appearance and Sooting” on Page 15. The Homeowner must contact a qualiﬁed service technician at once if any abnormal condition is observed.

Small Area Paint Touch-up

If the surface becomes stained or marred, it

may be lightly sanded and touched-up with spray paint available from your local authorized Lennox Hearth Products dealer.

NOTE:

•Only use factory-supplied paint for

touch-ups.

•Never attempt to paint a hot ﬁreplace.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

Header Spacing Top Standoffs

1/2” Nailing Flange

5/8” Nailing Flange

REMOVING AND INSTALLING THE GLASS ENCLOSURE PANEL

WARNING

• Do not attempt to substitute the materials used on this door or replace cracked or broken glass.

• Handle this glass with extreme care! Glass is susceptible to damage; do NOT scratch or handle roughly while reinstalling the glass door frame.

• The glass door(s) of this appli- ance must only be replaced as a complete unit as provided by the manufacturer. Do not attempt to replace broken, cracked, or chipped glass separately.

• Do not attempt to touch the front enclosure glass with your hands while the ﬁreplace is in use.

WARNING

Do not operate appliance with the glass front removed, cracked or broken.

AVERTISSEMENT

Ne pas utiliser l'appareil si le panneau frontal en verre n'est pas en place, est craqué ou brisé.

WARNING

Any safety screen or guard removed for servicing the appliance must be replaced prior to operating the appliance.

Only doors certiﬁed with the appliance shall be used.

Seules des portes certiﬁées pour cet appareil doivent être utilisées.

CAUTION: DO NOT abuse glass enclosure panel by striking or slamming shut.

This appliance is designed to operate only when the glass enclosure panel is installed.

Do NOT remove the glass enclosure panel unless necessary (e.g., to gain access to components within the ﬁrebox or to clean the glass).

Removing the Glass Enclosure Panel

1. Refer to Figure 6. To access the spring

latches securing the front glass enclosure

panel, open the lower control compartment

door by lifting and pulling the bottom panel forward.

2. Pull the spring latches forward and down to

release them from the lower door channel.

3. Pull the bottom of the glass enclosure panel

out a few inches, and grasp it on the right

and left sides. Gently lift to release the panel

from its upper channel, and then pull the

enclosure panel forward to remove it.

4. Visually inspect the gasket on the backside

of the enclosure panel frame. The gasket surface must be clean, free of irregularities,

and ﬁrmly seated.

Installing the Glass Enclosure Panel

1. Refer to Figure 6. Position the glass enclo-

sure panel in front of the rebox opening,

with the bottom of the enclosure panel held

away from the replace. Hook the top ange

of the enclosure panel frame over the top of the ﬁrebox frame.

2. Gently move the bottom of the enclosure

panel frame toward the replace, ensuring that the gasket seats evenly. Fasten the

two latches under the ﬁrebox ﬂoor to the vee-ﬂange on the enclosure panel. Close both latches securely.

Glass Door

Control Compartment Panel

Figure 6

Glass Door Spring Latch

Header Spacing Top Standoffs

Hood

5/8” Nailing Flange

1/2” Nailing Flange

Flush Nailing Flange

AVERTISSEMENT

Tout écran ou protecteur retiré pour permettre l’entretien de l’appareil doit être remis en place avant de mettre l’appareil en marche.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

INSTALLING VOLCANIC STONE, GLOWING EMBERS (ROCKWOOL), AND LOGS

NOTE: Turn OFF all electricity to the ﬁreplace before installing volcanic stone, glowing embers, or logs.

1. Remove the front glass enclosure panel

(see “Removing and Installing the Glass Enclosure Panel,” on previous Page).

2. Install ceramic brickaded panel liners.

3. Install decorative volcanic stone. Refer to

Figure 7. Sprinkle the decorative volcanic

stone in a pleasing pattern directly on the

rebox bottom, along the slope and to the back, at the right and left sides of the burner.

Volcanic Stone

Place Volcanic Stone As Shown

Figure 7

4. Place the glowing ember material (rockwool).

Note: The bag of Glowing Embers contains enough rockwool for several applications; therefore, do not use the entire bag at one time. For best glowing effect, replace the ember material annually.

Refer to Figure 8. Separate the glowing

ember material into pieces about the size

of a quarter. Keep the pieces uffed up,

not matted. Distribute the pieces over the

surface of the burner, as shown in Figures 9 and 10. Do not use more than is necessary.

Position the embers on the small holes of the ember bed area.

Note: Make sure the glowing ember material does NOT cover the main burner slots.

Bag of Glowing Embers (Rockwool)

Separate into individual “Quarter-sized” pieces.

Figure 8

5. Install the Logs.

The logs have locating notches or slots to help ensure that they are properly positioned.

The top logs that rest on lower logs, do so over notches, indents or nubs. Proper log

placement is critical to prevent sooting. Logs should be placed in the gaps between

the ame peaks and should be positioned so

they do not impinge the ﬂames. Follow the log placement instructions exactly.

MLBV-35: Install logs as shown in Figure 9. MLBV-40: Install logs as shown in Figure 10.

WARNING

• DO NOT attempt to install the logs until the appliance installation has been completed, the gas line connected and tested for leaks and the initial burner operation has been checked out.

• The size and position of the log set was engineered to give the 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 incomplete combustion, sooting, and poor ﬂame quality.

• 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, volcanic stone, embers, and logs.

• This appliance is not designed to burn wood. Any attempt to do so could cause irreparable damage to the appliance and prove hazardous to your safety.

• If logs are not installed according to the log installation instructions, ﬂame impingement and improper combustion could occur and result in soot and/or excessive production of carbon monoxide (CO), a colorless, odorless, toxic gas.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

MLBV-35 LOG PLACEMENT INSTRUCTIONS

Rear Log

Left Cross Log Right Cross Log

Left Rear Log Bracket

Left Front Log

Right Front Log

Right Rear Log Bracket

Note:

•Ceramic ﬁber logs are FRAGILE! Handle carefully to prevent breakage.

•Install volcanic stone and glowing embers BEFORE installing logs.

•To prevent sooting, make sure logs do not cover any burner openings.

MLBV Firebox Accessories/Parts

Cat. No. Model No. Description

H7666 — MLBV-35 Log Set Assembly

88L53 FGE Bag of Glowing Embers (Rockwool)

80L42 FDVS Bag of Decorative Volcanic Stone

Fit onto left rear log bracket

and rear bar of log rack.

Right Rear

Log Bracket

Glowing Embers

Log RackVolcanic Stone

(Do not place glowing embers over burner openings.)

NOTE: Install volcanic stone and glowing embers FIRST.

Position against left front corner of log rack.

Position against right front

corner of log rack.

Step 2. Fit bottom slots of Left Front Log (2) onto left front

corner of log rack.

Step 3. Fit bottom slots of Right Front Log (3) onto right front

corner of log rack.

Figure 9

Step 1. Fit bottom slots of Rear Log (1) onto left rear log bracket

and rear bar of log rack.

Position over Rear Log (1)

and against front bar of log rack.

Position over Right Front Log (3);

then ﬁt onto right rear log bracket.

Step 4. Place Left Cross Log (4) over Rear Log (1); then ﬁt

the bottom slot over the center front bar of log rack.

Step 5. Place Right Cross Log (5) over and behind Right Front Log

(3); then ﬁt the bottom slot onto the Right Rear Log Bracket.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 35”/40” MLBV MODELS • CARE AND OPERATION INSTRUCTIONS

MLBV-40 LOG PLACEMENT INSTRUCTIONS

Rear Log

Left Cross Log Right Cross Log

Fit onto left rear log bracket

and rear bar of grate.

Left Front Log

Right Front Log

Right Rear Log Bracket

Note:

•Ceramic ﬁber logs are FRAGILE! Handle carefully to prevent breakage.

•Install volcanic stone and glowing embers BEFORE installing logs.

•To prevent sooting, make sure logs do not cover any burner openings.

MLBV Firebox Accessories/Parts

Cat. No. Model No. Description

H7667 — MLBV-40 Log Set Assembly

88L53 FGE Bag of Glowing Embers (Rockwool)

80L42 FDVS Bag of Decorative Volcanic Stone

Position against left front corner of grate.

Glowing Embers

GrateVolcanic Stone

(Do not place glowing embers over burner openings.)

NOTE: Install volcanic stone and glowing embers FIRST. Step 1. Fit bottom slots of Rear Log (1) onto left rear log bracket

and rear bar of grate.

Position over Rear Log (1)

and against front bar of grate.

2 3

Step 4. Place Left Cross Log (4) over Rear Log (1); then ﬁt

the bottom slot over the center front bar of grate.

Figure 10

Position against right front

corner of grate.

Step 2. Fit bottom slots of Left Front Log (2) onto left front

corner of grate.

Step 3. Fit bottom slots of Right Front Log (3) onto right front

corner of grate.

Position over Right Front Log (3);

then ﬁt onto right rear log bracket.

2 3

Step 5. Place Right Cross Log (5) over and behind Right Front

Log (3); then ﬁt the bottom slot onto the right rear log bracket.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

BURNER AIR SHUTTER ADJUSTMENTS

(QUALIFIED TECHNICIANS ONLY)

Flame Appearance and Sooting

Proper ﬂame appearance is a ﬂame which is blue at the base and becomes yellowish-orange in the body of the ﬂame. When the appliance

is rst lit, the entire ame may be blue and will

gradually turn yellowish-orange during the ﬁrst 15 minutes of operation. After 15 minutes of

operation, if the ame is blue, or if the ame is orange with evidence of sooting (black tip), the

air shutter opening may need to be adjusted.

If the air shutter opening is closed too far, sooting may develop. Sooting is indicated by black puffs

developing at the tips of very long orange ﬂames.

Sooting results in black deposits forming on the logs, appliance inside surfaces and on exterior

surfaces adjacent to the vent termination. Sooting is caused by incomplete combustion in

the ames and lack of combustion air entering

the air shutter opening. To achieve a warm yellowish-orange ﬂame with an orange body

that does not soot, the shutter opening must be

adjusted between these two extremes.

Figure 11: Burner Flame Appearance Model MLBV-35

Air Shutter Adjustment Guidelines

• If there is smoke or soot present, rst check

the log set positioning to ensure that the ﬂames are not impinging on any of the logs. If the log set is properly positioned and a

sooting condition still exists, then the air

shutter opening should be increased.

• The more offsets in the vent system, the

larger the air shutter opening will need to be.

• An appliance operated with the air shutter opened too far, may have ames that appear blue and transparent. These weak, blue and

transparent ﬂames are termed anemic.

• Propane models may exhibit ames which

candle or appear stringy. If this is present and

persists, adjust the air shutter to a more open position, then operate the appliance for a few

more minutes to ensure that the ﬂame normalizes and the ﬂames do not appear sooty.

The following chart is provided to aid you in achieving the correct air shutter adjustment for your installation.

Air Shutter Adjustment Guidelines:

Amount of

Primary Air

If air shutter is closed too far

If air shutter is open too far

Flame

Color

Flame will be orange

Flame will be blue

Air Shutter

Adjustment

Air shutter gap should be increased

Air shutter gap should be decreased

Figure 12: Burner Flame Appearance Model MLBV-40

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

ELECTRONIC

Burner Air Shutter Adjustment Procedure

WARNING

• Air shutter adjustment should only be performed by a qualified professional service technician.

• Ensure front glass panel are in place and sealed during adjustment.

CAUTION

• Soot will be produced if the air shutter is closed too much. Any damage due to carboning resulting from improperly setting the air shutter is not covered under the warranty.

• The air shutter door and nearby appliance surfaces are hot. Exercise caution to avoid injury while adjusting ﬂame appearance.

1. Locate adjustment rod and adjust air shutter

to the standard setting as shown in Figure 13 (adjustment rod is located in the lower

control compartment).

Note: Move the adjustment rod DOWN to decrease air and UP to increase air.

2. Light appliance (follow lighting procedure

on lighting label in control compartment or see the lighting instructions on Pages 22 and 24 in this manual).

3. Allow the burner to operate for at least 15

minutes while observing the ﬂame continuously to ensure that the proper ﬂame appearance has been achieved (see Figures 11 and 12 on previous Page). If the following

conditions are present, adjust accordingly.

• If ame appears weak or sooty, adjust the air shutter, incrementally, to a more

open position until the proper ﬂame appearance is achieved.

• If ame stays lowered blue, adjust the air shutter, incrementally, to a more

closed position until the proper ﬂame appearance is achieved.

4. Leave the control knob (off/pilot/on) in the

ON position and the burner OFF/ON switch

OFF (and remote switches, if applicable).

5. When satisﬁed that the burner ﬂame ap-

pearance is normal, close the lower control

compartment door (see Figures 11 and 12 on previous Page).

Burner Air Shutter Adjustment

Adjustment Set-Screw

Adjustment Rod Up

Burner Tube

Air Shutter

Adjustment Rod Down min. air opening position)

Main Burner Factory Air Shutter

Opening Setting

Inches (millimeter)

Model Natural

Gas

MLBV-35

MLBV-40

1/32

(0.795)

1/32

(0.795)

(Fully Open Position)

Ref. Air shutter Patent: U.S. Pat. 5,553,603

Propane

Gas

3/16"

(4.763)

3/16"

(4.763)

APPLIANCE CHECKOUT

Millivolt Appliance Checkout

The pilot ame 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" (10 mm) at the pilot generator (thermopile) and the top 1/8" minimum (tip)

of the quick drop out thermocouple should be

engulfed in the pilot ﬂame. The ﬂame should project 1" (25 mm) beyond the hood at all three ports (see Figure 14).

To light the burner, refer to the lighting instructions on Page 22.

SIT MILLIVOLT PILOT ASSEMBLY

Proper Pilot Flame Appearance

Pilot Hood

Thermocouple

Pilot Nozzels

Thermopile

Figure 14

Electronic Appliance Checkout

To light the burner, refer to the lighting instructions on Page 24. Ensure the igniter lights the pilot. The pilot ﬂame should engulf the ﬂame sensor as shown in Figure 15.

ELECTRONIC PILOT ASSEMBLY

Sensor

Igniter

Igniter Rod

3/8" Min.

(9 mm)

Pilot Hood

Figure 13

Figure 15

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

Frame

Upper Right Side of Firebox

Lintel Screw Hole

SPILLAGE TEST

After appliance installation, perform this spillage

test to verify proper venting conditions: 1 - Place unit in its normally-operated condi-

tion, that is, with the glass enclosure panel

in place.

2 - Close all doors and windows in the room.

Turn on all exhaust fans in the house.

3 - Light the appliance. 4 - Wait 15 minutes. 5 - To check for venting action, start by hold-

ing a smoke producing device below the glass enclosure panel. The smoke should

be drawn into the control compartment.

Continue the test by moving the smoke-

producing device along the entire length of the lower edge of the glass enclosure panel.

6 - If the smoke is NOT drawn into the con-

trol compartment, turn off the appliance and call a qualiﬁed service technican.

Manually-Reset Safety Limit Switch

This appliance is equipped with a manuallyreset safety limit switch in the upper RIGHT

side of the rebox, behind the right side scoop.

Refer to Figure 16 for its location.

If, during appliance operation, the flame

goes out (independently of the burner ON/

OFF switch), the safety limit switch may have

tripped. Some causes for a tripped safety limit switch

include the following:

• Incorrect ﬂue conﬁguration

• Blocked ue

• Negative pressure inside house

Before resetting the safety limit switch, have a qualiﬁed service technician inspect the ﬁreplace and venting for these conditions and repair as needed.

To RESET the safety limit switch, push the

reset button located between the wire terminals

on the back of the switch. Follow the steps below to access the switch (also see Figure 16-C).

To REPLACE the safety limit switch, follow

the steps below.

IMPORTANT: This procedure should only be

performed by a qualiﬁed service technician.

Figure 16-A

Figure 16-B

Figure 16-C

Figure 16

Lintel Screw Hole

in Cabinet Top

Right Side

Scoop

Right Side

of Firebox

(right side Scoop removed)

Bracket (right side Scoop removed)

To access the Safety Limit Switch, reach in and up behind the Bracket, and push the red reset button located between the two Wire Terminals.

Safety Limit Switch / Reset Button Location

Inside View of Firebox (upper right side)

3 Scoop Screws

in Cabinet Top

Limit Switch Wire Terminals

(Red reset button is between the two terminals.)

Cabinet Corner

Door

1 - Turn OFF electrical power to appliance. 2 - Allow the appliance to cool. 3 - Remove the lower control compartment

access panel.

4 - Refer to Figure 6 on Page 11. Open both

latches under the ﬁrebox ﬂoor securing the glass enclosure panel. Remove the panel by tilting it outward at the bottom

and lifting it up. Set aside the panel, taking

care to protect it from damage.

5 - Remove the (3) screws securing the lintel,

and then remove the lintel. One of the lintel cabinet top holes is shown in Figure 16.

6 - Remove the (3) screws securing the

scoop, and then remove the scoop. Refer

to Figure 16 for correct location for model size.

7 - Reset the limit switch per Figure 16-B. If

unit does not reset, remove the (2) screws securing the safety switch bracket, and

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

pull the switch/bracket assembly (with

low voltage wires attached) through the side panel slot into the ﬁrebox.

8 - Replace the switch, if necessary. 9 - Reinstall the scoop and lintel. 10 - Reinstall the glass enclosure panel and

control compartment access panel.

The appliance should then relight and remain

lit. If this does not occur, contact your dealer.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

OUT

ORDERING REPLACEMENT PARTS

A complete parts list is found at the end of this manual. Use only parts supplied from the manufacturer.

With proper care and maintenance, your appliance will provide many years of enjoyment. If

you should experience any problem, rst refer

to the troubleshooting guide in this manual. If

problem persists, contact your Lennox Hearth

Products dealer or distributor.

Normally, all parts should be ordered through

your Lennox Hearth Products distributor or dealer. Parts will be shipped at prevailing prices at time of order.

When ordering repair parts, always give the

following information:

1. Appliance model number.

2. Appliance serial number.

3. Part number.

4. Part description.

5. Quantity required.

6. Appliance installation date.

If you encounter any problems or have any questions concerning the installation or ap-

plication of this system, please contact your

dealer or distributor.

PRODUCT REFERENCE INFORMATION

We recommend that you record the important reference information about your ﬁreplace in the space provided below.

Please call Lennox Hearth Products for the phone number of your nearest Lennox Hearth Products dealer who will answer your questions or address your concerns.

LENNOX HEARTH PRODUCTS 1508 Elm Hill Pike, Suite 108

UNIT CATALOG NUMBERS AND SHIPPING WEIGHTS

Cat.

No.

H8099 MLBV-35NM 86 lbs. 10.61 cu. ft.

H8100 MLBV-35PM 86 lbs. 10.61 cu. ft.

H8101 MLBV-35NE 86 lbs. 10.61 cu. ft.

H8102 MLBV-40NM 108 lbs. 14.01 cu. ft.

H8103 MLBV-40PM 108 lbs. 14.01 cu. ft.

H8104 MLBV-40NE 108 lbs. 14.01 cu. ft.

Model

Shipping

Weight

Shipping

Volume

Nashville, TN 37210 Visit us at www.Lennox.com 1-800-9-LENNOX

PRODUCT REFERENCE INFORMATION

Model Number ________________________________________________________

Serial Number ________________________________________________________

Date Installed _________________________________________________________

Gas Type Used ________________________________________________________

Dealer Name _________________________________________________________

WIRING DIAGRAMS

Wiring diagrams are provided 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.

CAUTION: WHEN SERVICING CONTROLS, LABEL ALL WIRES PRIOR TO DISCONNECTION. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION.

VERIFY PROPER OPERATION AFTER SERVICING.

Figure 17

CAUTION: LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN

CAUSE IMPROPER AND DANGEROUS

APPLIANCE OPERATION.

ATTENTION: AU MOMEN T DE L'ENTRETIEN DES COMMANDES,

ÉTIQUETEZ TOUS LES FILS AVANT DE LES DÉBRANCHER. DES ERREURS DE CÁBLAGE PEU-VENT ENTRAÎNER UN

FONCTIONNEMENT INADÉQUAT ET

DANGEREUX.

MILLIVOLT WIRING DIAGRAM

B-VENT APPLIANCES ONLY: The High Limit Switch must be factory installed in series, as shown. If wires to this switch must be replaced, use Type AWM 200°C - 18 gage wire ONLY.

High Limit Switch

Control Switch*

_________ *Control switch options: ON/OFF wall switch, unit-mountable ON/OFF switch,

or ON/OFF remote control system

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

If any of the original wire must be replaced, use Type AWM 105º C - 18 gage wire ONLY.

Thermopile

Gas Control

Valve Terminals

TP HTP

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

TRANSFORMER 3V

BROWN

BLACK

BATTERY BACK-UP

BLACK (SENSOR)

BLACK (IGNITER)

IGNITER MODULE

RED

PILOT

OUT

VENT

ORANGE (THTP)

BLACK (TP)

GREEN (TH)

HIGH LIMIT SWITCH

Pilot Burner

Pilot Tube

Assembly

Schematic Representation Only

Electronic Gas Control Valve - DEXEN

B-Vent appliances only - High limit switch must be factory installed as shown. If wires to this switch are replaced, wires must be Type AWM 200°C - 18 gage wire ONLY.

CONTROL SWITCH *

UNIT MOUNTED

ON/OFF SWITCH,

IF SUPPLIED

Junction Box

J-Box Wiring

BK W

CAV 021

* Control Switches: Wall On/Off Switch, Unit Mounted On/Off Switch or Remote Control Switch.

NOTES:

1. If any of the original wire as supplied must be replaced, use Type AWM 105°C - 18 gage wire ONLY.

2. 120 VAC, 60 Hz - Less than 3 Amps. CAUTION: label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

ELECTRONIC IGNITION WIRING DIAGRAM

Figure 18

ACCESSORY COMPONENTS

ON/OFF Wall Switch Kit

Install the wall switch in a convenient location near the ﬁreplace to provide ON/OFF operation in lieu of a unit-mounted switch.

White Wall Switch Kit

Cat. No. Model No. Description

85L87 FWSK OFF/ON Wall Switch Kit

Unit-Mountable ON/OFF Switch

Install the ON/OFF switch kit in the mounting bracket

to provide ON/OFF operation in lieu of a wall switch.

Cat. No. Model No. Description

80L41 FRS ON/OFF Switch Kit

Unit Moutable ON/OFF Switch Kit

_________ *Control switch options: ON/OFF wall switch, unit-mountable ON/OFF switch,

or ON/OFF remote control system

Standard ON/OFF Remote Control System

The Model RCL Standard Remote Control System

provides convenient ﬁreplace ON/OFF control in an

easy-to-install kit. The kit includes the following items:

• Hand-held transmitter with ON/OFF buttons that briey illuminate when pressed, to indicate a signal

has been sent

• Remote receiver with wall-mount cover plate (receiver can be wall- or hearth-mounted)

• All required hardware to install the unit

• Detailed instructions

Model RCL is designed to operate with all millivolt and electronic ignition systems, as well as either natural

gas or propane gas appliances.

Cat. No. Model No. Description

H0249 RCL Std Remote Control System

Remote Control Kit, Standard

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

Arch Pane Design

Square Pane Design

ACCESSORY COMPONENTS (continued)

Style View Screen Doors

These decorative but functional twin-pane screen doors provide a barrier to prevent direct contact with the hot glass surface of the ﬁreplace front enclosure panel. Style View Screen Doors easily install over the standard glass enclosure panel with heavy-duty magnet door latches (no hardware required).

Arch Pane Design

ARCH PANE DESIGN KITS

Cat. No. Model Description Model Series

APDML35C

H6106

H6107

H6108

H6109

APDML35SP

APDML40C

APDML40SP

35” Arch Pane Door, Painted

35” Arch Pane Door, Satin Pewter

40” Arch Pane Door, Painted

40” Arch Pane Door, Satin Pewter

MLBV-35

MLBV-40

Barrier Screen Panel Kit

This easy-to-install optional screen panel installs over the standard glass enclosure panel and provides a barrier to prevent direct contact with the hot glass surface.

Note: Barrier Screen Panels cannot be used in conjunction with Style View doors.

Square Pane Design

SQUARE PANE DESIGN KITS

Cat. No. Model Description Model Series

H6098 SPDML35C

SPDML35SP

H6099

H6100 SPDML40C

SPDML40SP

H6101

35” Square Pane Door, Painted

35” Square Pane Door, Satin Pewter

40” Square Pane Door, Painted

40” Square Pane Door, Satin Pewter

Barrier Screen Panel Kits

Cat. No. Model No. Models Where Used

H6095 35MSPK MLBV-35

H3989 40LSPK MLBV-40

MLBV-35

MLBV-40

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

ACCESSORY COMPONENTS

(continued)

Ceramic Brickaded Panel Liner Kit

Ceramic Brickaded Panel Liner Kits contain a complete set of ceramic panels with brick-like features

and detail.

Ceramic Brick Liner Kits

Cat. No. Model No. Description

H8087 MBLPKB-35B

H8090 MBLPKB-40B

Brickaded Panel Liner Kit 35" Buff Rustic

Brickaded Panel Liner Kit 40" Buff Rustic

•BagofGlowingEmbers(Rockwool)

•BagofDecorativeVolcanicStone

Order replacement Glowing Ember material

(rockwool) or Decorative Volcanic Stone as needed

for periodic maintenance of the appliance.

Decorative Firebox Accessories

(all models)

Cat. No. Model No. Description

88L53 FGE Bag of Glowing Embers

80L42 FDVS

Bag of Decorative Volcanic Stone

Touch-Up Paint Kit

Use the touch-up paint to cover minor scratches

or discoloration of the appliance’s black painted

surfaces.

Touch-Up Paint Kit

(all models)

Cat. No. Model No. Description

90L73 FTPK-B Touch-Up Paint (Black)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

LIGHTING INSTRUCTIONS – MILLIVOLT GAS VALVE

FOR YOUR SAFETY READ BEFORE LIGHTING

WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

A. This appliance has a pilot which must be lighted by a piezo

igniter. When lighting the pilot, follow these instructions exactly.

B. BEFORE LIGHTING smell all around the appliance area for

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department.

C. Use only your hand to push in or turn the gas control knob.

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:

• Do not try to light any appliance.

D. Do not use this appliance if any part has been under water.

• Do not touch any electric switch; do not use any phone in your building.

LIGHTING INSTRUCTIONS

1. STOP! Read the safety information above on this label.

2. (If applicable) Set the thermostat to lowest setting. Turn wall on/off

switch, unit mounted on/off switch or remote control switch "OFF."

3. Turn OFF all electric power to the appliance.

4. Access the control compartment.

5. Push in gas control knob slightly and turn clockwise to "OFF."

NOTE: Knob cannot be turned from "PILOT" to "OFF" unless knob is

pushed in slightly. Do Not force.

6. Wait five (5) minutes to clear out any gas. Then smell for gas,

including near the floor. If you smell gas, STOP! Follow "B" in the safety information above on this label. If you don't smell gas, go to the next step.

7. Find pilot - located in firebox on the same plane as the top of the burner.

8. Turn knob on gas control counterclockwise to "PILOT."

9. Push in control knob all the way and hold in. Immediately light the pilot

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 9.

• If knob does not pop up when released, stop and immediately call your service technician or gas supplier.

10. Turn gas control knob counterclockwise to "ON."

11. Close control compartment.

12. (If applicable) Turn on all electrical power to the appliance.

13. (If applicable) Set thermostat to desired setting. Turn wall on/off switch,

Robertshaw

.sthgil tolip litnu )nottub eht gnihsup( retingi ozeip eht gnireggirt yb

Honeywell

Never use tools. If the knob will not push in or turn by hand, don’t try to repair it, call a qualified service technician. Force or attempted repair may result in a fire or explosion.

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.

• If the pilot will not stay lit after several tries, turn the gas control knob to "OFF" and call your service technician or gas supplier.

unit mounted on/off switch or remote control switch "ON."

SIT

Gas Control Valves

IN OUT

OUT

Gas Control Knobs

PILOT

OFF

PILOT

Pilot Assemblies

TPTH TP

TO TURN OFF GAS TO APPLIANCE

1. (If applicable) Set the thermostat to lowest setting. Turn wall on/off switch, unit mounted on/off switch or remote control switch "OFF."

Turn OFF all electric power to the appliance, if service is to be performed.

Access the control compartment.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Push in gas control knob slightly and turn clockwise to "OFF." Do not force.

5. Close the main line gas shut-off valve.

6. Close control compartment.

62L2901

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

INSTRUCTIONS D’ALLUMAGE – VANNE GAZ MILLIVOLT

POUR PLUS DE SÉCURITÉ, LIRE AVANT D’ALLUMER

AVERTISSEMENT. Quiconque ne respecte pas à la lettre les instructions dans la présente notice risque de déclencher un incendie ou une explosion entraînant des dommages, des blessures ou la mort.

A.Cet appareil est muni d’une veilleuse qui doit être

allumée avec un allumeur piézo-électrique. Respectez les instructions ci-dessous à la lettre.

B. AVANT L’ALLUMAGE: Avant d’allumer la veilleuse, reniflez

tout autour de l’appareil pour déceler une odeur de gaz. Reniflez près du plancher, car certains gaz sont plus lourds que l’air et peuvent s’accumuler au niveau du sol.

QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :

• Ne pas tenter d’allumer d’appareil.

• Ne touchez à aucun interrupteur ; ne pas vous servir des

téléphones se trouvant dans le bâtiment.

INSTRUCTIONS D’ALLUMAGE

1. ARRÊTEZ ! Lisez les instructions de sécurité sur la portion supérieure de cette étiquette.

2. (Si applicable) Réglez le thermostat à la température la plus basse. Tournez l’interrupteur murale, l’interrupteur sur l’unité ou le contrôle à distance à "OFF. "

3. Coupez l’alimentation électrique de l’appareil.

4. Accédez au compartiment de contrôle.

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. Attendre cinq (5) minutes pour laisser échapper tout le gaz. Reniflez tout autour de l’appareil, y compris près du plancher, pour déceler une odeur de gaz. Si vous sentez une odeur de gaz, ARRÊTEZ ! Passez à l’étape B des instructions de sécurité sur la portion supérieure de cette étiquette. S’il n’y a pas d’odeur de gaz, passez à l’étape suivante.

7. Trouver le pilote –

brûleur.

8. Tournez le bouton de contrôle sur la valve à gaz dans le sens antihoraire

vers "Pilote".

9. 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

inclusivement.

Situé dans l’âtre sur la même surface que le dessus du

elle s’éteint, répétez les étapes 5 à 8

• Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les instructions du fournisseur.

• Si vous ne pouvez rejoindre le fournisseur, appelez le service des incendies.

C. Ne pousser ou tourner la manette d’admission du gaz qu’à la

main. Ne jamais employer d’outil à cette fin. Si la manette reste coincée, ne tentez pas de la réparer; appelez un technicien qualifié. Quiconque tente de forcer la manette ou de la réparer peut provoquer une explosion ou un incendie.

D. N’utilisez pas cet appareil s’il a été plongé dans l’eau, même

partiellement. Faites inspecter l’appareil par un technicien qualifié et remplacez toute partie du système de contrôle et toute commande qui ont été plongés dans l’eau.

• Si la manette ne se soulève pas d’elle-même lorsqu’on la relâche, arrêter et appeler immédiatement un technicien qualifié ou le fournisseur de gaz.

• Si la veilleuse ne reste pas allumée après plusieurs tentatives, réglez la manette d’admission du gaz à la position OFF et appelez un technicien qualifié ou le fournisseur de gaz.

10. Tournez le bouton de réglage du gaz en sens inverse des aiguilles d’une montre jusqu’à sa position de marche “ON”.

11. Fermer le compartiment de contrôle.

12. (Si applicable) Mettez l’appareil sous tension.

13. (Si applicable) Réglez le thermostat à la température désirée.

à "ON. "

SIT

Robertshaw

Honeywell

Vanne Gaz Millivolt

OUT

Bouton de réglage du gaz

PILOT

OFF

PILOT

IN OUT

Millivolt Pilot

TPTH TP

Tournez

ecnatsid à elôrtnoc el uo étinu’l rus ruetpurretni’l ,elarum ruetpurretni’l

COMMENT COUPER L’ADMISSION DE GAZ DE L’APPAREIL

1. (Si applicable) Réglez le thermostat à la température la plus basse. Tournez

"OFF. "

Coupez l’alimentation électrique de l’appareil s’il faut procéder à l’entretien.

Accédez au compartiment de contrôle.

REMARQUE : LES SCHÉMAS ET LES ILLUSTRATIONS NE SONT PAS À L’ÉCHELLE

4. Enfoncez légèrement le bouton de réglage du gaz et tournez-le dans le

à ecnatsid à elôrtnoc el uo étinu’l rus ruetpurretni’l ,elarum ruetpurretni’l

5. Fermer la valve de gaz principale.

6. Fermer le compartiment de contrôle.

.”FFO“ têrra’d noitisop al à’uqsuj ertnom enu’d selliugia sed snes

Ne forcez pas le bouton.

62L3001

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

LIGHTING INSTRUCTIONS — ELECTRONIC

FOR YOUR SAFETY READ BEFORE OPERATING

WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

A. This appliance is equipped with an ignition device which

automatically lights the pilot. Do not try to light the pilot by hand.

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:

• Do not try to light any appliance.

• Do not touch any electric switch; do not use any phone in your

building.

OPERATING INSTRUCTIONS

1. STOP! Read the safety information above on this label.

2. (If applicable) Set the thermostat to lowest setting. Turn

on/off switch, unit mounted on/off switch or remote control switch

"OFF." If used, remove the batteries from the battery

holder.

3. Turn OFF all electric power to the appliance.

4. This appliance is equipped with an ignition device which automatically lights the pilot. Do not try to light the pilot by hand.

5. Access the control compartment.

6. Wait five (5) minutes to clear out any gas. If you smell gas, STOP! Follow "B" in the safety information above on this label. If you don't smell gas, go to the next step.

7. Turn on all electrical power to the appliance.

8. (If applicable) Set thermostat to desired setting. Turn

off switch, unit mounted on/off switch or remote control switch

"ON." Replace the batteries in the battery holder, if used.

wall

wall on/

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department.

C. If any portion of this appliance does not operate as the

instructions indicate, do not try to repair it, call a qualified service technician. Do not use tools. Force or attempted repair may result in a fire or 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.

9. Close control compartment.

10. If the appliance will not operate, follow the instructions "To

Turn Off Gas To Appliance" and call your service technician or gas supplier.

VENT

Electronic Gas Control

Valve - DEXEN

Electronic Pilot Assembly

PILOT

OUT

TO TURN OFF GAS TO APPLIANCE

1. (If applicable) Set the thermostat to lowest setting. Turn wall on/off switch, unit mounted on/off switch or remote control switch "OFF."

2. Turn OFF all electric power to the appliance and remove

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

backup batteries, if service is to be performed.

3. Access the control compartment.

4. Close the main line gas shut-off valve.

5. Close control compartment.

100963-01

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

INSTRUCTIONS D’ALLUMAGE — ELECTRONIC

POUR PLUS DE SÉCURITÉ LIRE AVANT DE METTRE EN MARCHE

AVERTISSEMENT. Quiconque ne respecte pas à la lettre les instructions dans la présente notice risque de déclencher un incendie ou une explosion entraînant des dommages, des blessures ou la mort.

A. Cet appareil est muni d’un dispositif d’allumage qui allume

automatiquement la veilleuse. Ne tentez pas d’allumer la veilleuse manuellement.

B. AVANT DE FAIRE FONCTIONNER, reniflez tout autour de

l’appareil pour déceler une odeur de gaz. Reniflez près du plancher, car certains gaz sont plus lourds que l’air et peuvent s’accumuler au niveau du sol.

QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :

• Ne pas tenter d’allumer d’appareil.

• Ne touchez à aucun interrupteur; ne pas vous servir des

téléphones se trouvant dans le bâtiment.

INSTRUCTIONS DE MISE EN MARCHE

1. ARRÊTEZ ! Lisez les instructions de sécurité sur la portion

supérieure de cette étiquette.

2. (Si applicable) Réglez le thermostat à la température la plus

basse. Tournez l’interrupteur murale, l’interrupteur sur l’unité ou le contrôle à distance à "OFF." batteries, retirez-les de leur support.

3. Coupez l’alimentation électrique de l’appareil.

4. Cet appareil est muni d’un dispositif d’allumage qui allume

automatiquement la veilleuse. Ne tentez pas d’allumer la veilleuse manuellement.

5. Accédez au compartiment de contrôle.

6. Attendre cinq (5) minutes pour laisser échapper tout le gaz.

Reniflez tout autour de l’appareil, y compris près du plancher, pour déceler une odeur de gaz. Si vous sentez une odeur de gaz, ARRÊTEZ ! Passez à l’étape B des instructions de sécurité sur la portion supérieure de cette étiquette. S’il n’y a pas d’odeur de gaz, passez à l’étape suivante.

7. Mettez l’appareil sous tension.

Si l’appareil fonctionne avec des

• Appelez immédiatement votre fournisseur de gaz depuis un voisin. Suivez les instructions du fournisseur.

• Si vous ne pouvez rejoindre le fournisseur, appelez le service des incendies.

C. Si un élément de cette unité ne fonctionne pas tel que décrit

dans les instructions, n’essayez pas de le réparer, appelez un technicien qualifié. N’utilisez-pas d’outils. Le fait de forcer la manette ou de la réparer peut déclencher une explosion ou un incendie.

D. N’utilisez pas cet appareil s’il a été plongé dans l’eau, même

partiellement. Faites inspecter l’appareil par un technicien qualifié et remplacez toute partie du système de contrôle et toute commande qui ont été plongés dans l’eau.

8. (Si applicable) Réglez le thermostat à la température désirée.

Tournez l’interrupteur murale, l’interrupteur sur l’unité ou le contrôle à distance à "ON." Replacer les batteries dans leur support.

9. Fermer le compartiment de contrôle.

10. Si l’appareil ne se met pas en marche, suivez les instructions

intitulées « Comment couper l’admission de gaz de l’appareil » et appelez un technicien qualifié ou le fournisseur de gaz.

VENT

Valve électronique -

DEXEN

Veilleuse de

l’appareil électronique

PILOT

OUT

COMMENT COUPER L’ADMISSION DE GAZ DE L’APPAREIL

1. (Si applicable) Réglez le thermostat à la température la plus basse. Tournez l’interrupteur murale, l’interrupteur sur l’unité ou le contrôle à distance à "OFF. "

2. Couper toute alimentation électrique et retirer les batteries de leur

REMARQUE : LES SCHÉMAS ET LES ILLUSTRATIONS NE SONT PAS À L’ÉCHELLE

support, si un entretien doit être fait sur l’unité.

3. Accédez au compartiment de contrôle.

4. Fermer la valve de gaz principale.

5. Fermer le compartiment de contrôle.

100964-01

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

MAINTENANCE SCHEDULE

Annually (before burning season)

MAINTENANCE TASK ACCOMPLISHING PERSON PROCEDURE

Inspect/Clean Burner, Logs,

and Controls

Check Flame Patterns and Flame Height

Inspect/Clean Pilot and Burner Qualiﬁed Service Technician Refer to Figure 14 (SIT Millivolt) or Figure 15 (Electronic) on Page

Check Vent System Qualiﬁed Service Technician Inspect the vent system at the top and at the base (within the

Appliance Checkout Qualiﬁed Service Technician Perform the appropriate appliance checkout procedure detailed

Qualiﬁed Service Technician Inspect valve and ensure it is properly operating. Check piping for

leaks. Vacuum the control compartment, logs, and burner area.

Qualiﬁed Service Technician Refer to Figures 11 and 12 on Page 15 and verify the ﬂame

pattern and height displayed by the appliance conforms to the picture. Flames must not impinge on the logs. Ensure ﬂames are steady (not lifting or ﬂoating).

16. Remove any surface build-up on pilot and burner assembly.

Wipe the pilot nozzles, igniter/ame rod and hood. Ensure the

pilot ﬂame engulfs the ﬂame sensor as shown.

rebox) for signs of blockage or obstruction. Look for any signs

of dislocation or deterioration of the vent components. Reconnect

or replace, as needed.

Note: Excessive condensation can cause corrosion of caps, pipe and ﬁttings (excessive condensation can be caused by long lateral runs, too many elbows and/or exterior portions of the system being exposed to cold weather). Also inspect wall straps or plumbers's tape to ensure it is secure and in place.

in this manual.

Replace Glowing Ember Materials (Rockwool)

Homeowner/Qualiﬁed Service Technician

Remove old glowing ember materials (rockwool) and vacuum

the ember placement area. Place new embers as described and shown in Figures 8–10.

Periodically (after burning season)

MAINTENANCE TASK ACCOMPLISHING PERSON PROCEDURE

Clean Firebox Interior Homeowner Carefully remove logs, glowing embers (rockwool), and volcanic

stone. Vacuum out interior of the ﬁrebox. Clean ﬁrebox walls and

log grate. Replace logs, rockwool, and volcanic stone as detailed

in this manual.

Check Flame Patterns and Flame Height Homeowner Refer to Figures 11 and 12 on Page 15 and verify the ﬂame pat-

tern and height displayed by the appliance conforms to the picture. Flames must not impinge on the logs.

Check Vent System Homeowner 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 dislocation of the vent components. Reconnect or replace, as needed.

Clean Front Glass Enclosure Panel Homeowner Clean as necessary following the directions provided in this manual.

DO NOT TOUCH OR CLEAN GLASS WHILE HOT.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

TROUBLESHOOTING GUIDE – MILLIVOLT CONTROL SYSTEM

Note: Before troubleshooting the gas control system, make sure the external gas shut off valve (located at gas supply inlet) and wall switch (if applicable) are in the “ON” position.

Important: Valve system troubleshooting should only be performed by a qualiﬁed service technician.

SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION

1. Spark igniter will not light pilot after

repeated triggering of igniter button.

WARNING: if the pilot will not light

after 1 minute of lighting attempts, wait at least 5 minutes for gas to clear before attempting again.

2. Pilot will not stay lit after carefully

following the lighting instructions.

3. Pilot burning; no gas to burner;

valve knob set to “ON”; and burner OFF/ON switch (unit-mounted switch, wall switch, or remote control) is set to “ON.”

4. Frequent pilot/burner outage

problem.

A. Defective igniter (no spark at electrode). Check for spark at electrode and pilot; if no spark and

electrode wire is properly connected, replace igniter.

B. Defective or misaligned electrode at pilot

(spark at electrode).

C. Gas supply pressure errant. Check inlet gas pressure. It should be within the limits

D. Pilot oriﬁce plugged. Clean or replace pilot oriﬁce. A. Defective pilot generator

(thermocouple).

A. Wall switch or wires defective. Check wall switch and wires for proper connections.

B. Thermopile may not be generating

sufﬁcient millivolts.

C. Plugged burner oriﬁce. Check burner orice for blockage; remove, if found. D. OFF/ON Switch and *Remote Switch are

in the ON position, resulting in excessive resistance.

A. Pilot ame may be too low or blowing (high),

causing the pilot/valve safety to drop out.

Using a match, light pilot. If pilot lights, turn off pilot and trigger the igniter 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; it should be 1/8" to have a strong spark.

as marked on the rating plate.

Check pilot ame, it must impinge on thermocouple

(see Figure 14 on Page 16). Clean and/or adjust pilot for maximum ﬂame impingement on thermocouple. Ensure that the connection between the valve and thermocouple are tight and secure.

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

thermopile terminals of gas valve. Should read 325 millivolts minimum with optional wall switch in the “OFF” position. Replace faulty thermopile if reading is below speciﬁed minimum.

When turning on the burner using a *remote switch,

ensure that the standard OFF/ON switch is in the “OFF”

position. If both switches are in the “ON” position,

it may result in excessive resistance (and millivolt drainage) and the burner may not come on.

Clean and/or adjust pilot ﬂame for maximum ﬂame impingement on thermocouple (see Figure 14 on

Page 16).

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

TROUBLESHOOTING GUIDE – ELECTRONIC IGNITION SYSTEM

Note: Before troubleshooting, make sure the appliance main line gas shut-off valve, gas control valve, and wall switch (if applicable) are in the “ON” position.

Important: Valve system troubleshooting should only be performed by a qualiﬁed service technician.

SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION

1. Nothing happens when

ON/OFF switch is turned

on (pilot does not spark).

2. Main burner does not

light and igniter is

sparking.

3. Main burner lights;

then shuts off unexpectedly.

A. Low voltage/or bad lead

wires.

B. Damaged igniter wire.

C. Damaged pilot assembly.

D. Batteries Low

A. No fuel supply.

B. Loose sensor wire.

C. Loose wires to valve.

D. Loose wires to ignition

module.

E. Air in gas line.

F. Low voltage.

A. Gas supply is set to

“OFF.”

B. Loose wires to valve.

Check voltage on AC terminals of module an/or batteries. Voltage should be between 2.7 and 3.2 VAC. Make sure wire connections are secure.

Check for visible cracked casing, cuts, etc.

Check pilot assembly for visibly broken spark electrode, etc.

Check voltage on DC terminal of batteries. The value should be around 3.0V.

Make sure gas supply is turned on.

Make sure sensor wire connection is securely connected.

Make sure black, green, and orange wires are securely connected to the valve.

Make sure black sensor wire and black igniter wire are securely connected to

ignition module.

Purge gas line of air.

Test voltage at AC terminals of module and/or batteries. Voltage should be between 2.7 and 3.2 VAC.

Set gas supply to “ON.”

Make sure black, green, and orange wires are securely connected to the valve.

4. Soot on logs and/or

glass.

C. Loose wires to ignition

module.

D. Flame does not engulf

ﬂame sensor.

E. Obstructed vent system.

A. Flame impingement on

the log.

B. Improper air shutter

opening.

Make sure black sensor wire (“S”) and black igniter wire (“I”) are securely

connected to ignition module.

Check location of sensor.

Check vent system for obstructions. Reset safety limit switch (see Page 17).

Check for proper log placement.

Check for proper air shutter openings.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

REPLACEMENT PARTS LIST

Contact an Authorized Lennox Hearth Products dealer to obtain any of these parts. Never use substitute materials. Use of non-approved parts

Item

No.

1 Hood H7266 1 H7267 1 2 Lower Control Compartment Panel 3 Enclosure, Glass Front (Complete) H7264 1 H7265 1 4 Door Latch Spring H1264 2 H1264 2 5 Log Set (Complete) H7666 1 H7667 1 6 Burner Assembly H7717 1 H7718 1 7 Oriﬁce, Main Burner - Natural Gas H1236 1 99K75 1

Oriﬁce, Main Burner - Propane Gas 62L37 1 19L52 1

8 Bag of Glowing Embers (Rockwool) 88L53 1 88L53 1

Bag of Decorative Volcanic Stone 80L42 1 80L42 1

9 Oriﬁce Holder H7257 1 H7257 1 10 Gas Line Flexible Connector 93L32 1 93L32 1 11 Sub-Floor H7450 1 H7462 1 12 Grate H7719 1 H7720 1 13 Limit Switch H1614 1 H1614 1

Item

No.

15 Gas Valve, SIT H6209 1 88J53 1 16 Piezo Igniter 10K86 1 10K86 1

Piezo Igniter Wire 56L21 1 56L21 1 17 Pilot Assembly 69L17 1 69L18 1 18 Pilot Generator 60J79 1 60J79 1 19 Thermocouple 74L57 1 74L57 1 20 Pilot Tube 74L56 1 74L56 1 21 Electrode and Cable H6212 1 H6212 1

Description

Gas Controls - SIT Millivolt

Description

MLBV-35 MLBV-40

Part No. Qty. Part No. Qty.

H7262

Natural Gas Propane Gas

Part No. Qty. Part No. Qty.

H7263

can result in poor performance and safety hazards.

WARNING

Failure to position the parts in accordance with these diagrams or failure to use only parts speciﬁcally approved with this appliance may result in property damage or personal injury.

AVERTISSEMENT

Risque de dommages ou de blessures si les pièces ne sont pas installées conformément à ces schémas et ou si des pièces autres que celles spéciﬁquement approuvées avec cet appareil sont utilisées.

Gas Controls - Dexen Electronic

Item

No.

28 Gas Valve, Dexen H4681 1 H4928 1 29 Pilot Assembly H4673 1 H4929 1 30 Igniter Module H4674 1 H4674 1 31 Battery Holder H4675 1 H4675 1 32 Wire Harness H4676 1 H4676 1 33 Adaptor H4677 1 H4677 1

Dexen Electronic

Gas Controls

Description

Natural Gas Propane Gas

Part No. Qty. Part No. Qty.

SIT Millivolt

Gas Controls

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS

Lennox Hearth Products reserves the right to make changes at any time, without notice, in design, materials, specications, prices and also to discontinue colors, styles and products.

Consult your local distributor for ﬁreplace code information.

P/N 506017-03 Rev. B 06/2011

1508ElmHillPike,Suite108•Nashville,TN37210

Lennox MLBV-35PM, MLBV-35NM User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual