Page 2 - Safety and; To order a FREE Lennox; Operation Warnings; All parts of your Lennox; TABLE OF CONTENTS; Pay special attention to all warnings and safety information.; FREE; SAFETY; OFFER; The Lennox; To receive your FREE
2 LENNOX HEARTH PRODUCTS • MERIT ® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS Safety and Your Fireplace 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...
Page 3 - GRATUIT pour votre foyer, consultez; Toutes les parties de votre foyer; SAFETY GUARD GRATIS; ¡Todas las partes de la chimenea; Seguridad y
3 LENNOX HEARTH PRODUCTS • MERIT ® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS 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 PA...
Page 4 - Important Safety Information
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 qual...
Page 5 - APPOSITION DES MISES EN GARDE RELATIVES; Figure A
5 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 HOMEOWNER’S INSTRUCTIONS: ATTACHING “SAFETY-IN-OPERATION” WARNINGS APPOSITION DES MISES EN GARDE RELATIVES à LA SÉCURITÉ D’...
Page 6 - Warranty Information; Your gas appliance is covered by a limited; Appliance Operation Notices; WARNING; and Maintenance Notices
6 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 Warranty Information Your gas appliance is covered by a limited twenty-year warranty. You will find a copy of the warranty ...
Page 7 - GENERAL INFORMATION; Millivolt; Gas pressure requirements are listed in; BTU Input; fireplace, clean the glass after; AFTER THE GLASS HAS; the white film will bake onto the; Orifice Sizes; Deration; Gas Pressure Requirements
7 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 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. GENERAL INFORMATION The fireplace models covered in this manual are B-...
Page 8 - OPERATION AND CARE OF YOUR APPLIANCE; same room as the appliance. Toddlers, young children and others; AVERTISSEMENT; risque d’avoir accès à la pièce et aux surfaces chaudes.; GAS CONTROLS / CONTROL; Figure 1; Control Compartment Door Tab
8 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 OPERATION AND CARE OF YOUR APPLIANCE WARNING Young children should be carefully supervised when they are in the same room a...
Page 9 - Do not operate the shutoff lever; Appliance Controls; Lighting the Appliance; CONTROLS FOR OPTIONAL
9 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 Figure 4 Supply Gas Inlet Pressure-Tap (Manifold) Regulator Mounting Screw Burner Stage Terminal Gas Outlet To Burner Groun...
Page 10 - MAINTENANCE INSTRUCTIONS; a qualified service technician at once if any; Turn off gas and electrical power
10 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 perform...
Page 11 - REMOVING AND INSTALLING; Only doors certified with the appliance; Seules des portes certifiées pour cet; CAUTION: DO NOT abuse glass enclosure; Removing the Glass Enclosure Panel; Refer to; Installing the Glass Enclosure Panel; Figure 6
11 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 Figure 6 REMOVING AND INSTALLING THE GLASS ENCLOSURE PANEL Control Compartment Panel Hood Glass Door Header Spacing Top St...
Page 12 - Place the glowing ember material; Separate into individual; INSTALLING VOLCANIC; Remove the front glass enclosure panel; Install ceramic brickaded panel liners.; Install decorative volcanic stone. Refer to
12 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 WARNING • DO NOT attempt to install the logs until the appliance installation has been completed, the gas line connected a...
Page 13 - MLBV Firebox Accessories/Parts; Figure 9; MLBV-35 LOG PLACEMENT INSTRUCTIONS; and rear bar of log rack.
13 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 Firebox Accessories/Parts Cat. No. Model No. Description H7666 — MLBV-35 Log Set Assembly 88L53 FGE Bag of Glowing Em...
Page 14 - and rear bar of grate.; MLBV-40 LOG PLACEMENT INSTRUCTIONS; the bottom slot over the center front bar of grate.
14 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 Firebox Accessories/Parts Cat. No. Model No. Description H7667 — MLBV-40 Log Set Assembly 88L53 FGE Bag of Glowing Embers...
Page 15 - Figure 12: Burner Flame Appearance Model MLBV-40; BURNER AIR SHUTTER; Flame Appearance and Sooting
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 Figure 12: Burner Flame Appearance Model MLBV-40 Figure 11: Burner Flame Appearance Model MLBV-35 BURNER AIR SHUTTER ADjUS...
Page 16 - APPLIANCE CHECKOUT; Millivolt Appliance Checkout; Locate adjustment rod and adjust air shutter; Figure; Light appliance (follow lighting procedure; Burner Air Shutter Adjustment; Allow the burner to operate for at least 15; Figures; Figures
16 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 WARNING • Air shutter adjustment should only be performed by a quali- fied professional ser vice technician. • Ensure fron...
Page 17 - SPILLAGE TEST; Manually-Reset Safety Limit Switch; low to access the switch (also see
17 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 Safety Limit Switch / Reset Button Location Inside View of Firebox (upper right side) Figure 16 Figure 16-C Limit Switch W...
Page 18 - MILLIVOLT WIRING DIAGRAM; WIRING DIAGRAMS; PRODUCT REFERENCE INFORMATION; LENNOX HEARTH PRODUCTS
18 LENNOX HEARTH PRODUCTS • MERIT ® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS Figure 17 MILLIVOLT WIRING DIAGRAM CAUTION: WHEN SERVICING CONTROLS, LABEL ALL WIRES PRIOR TO DISCONNECTION. WIRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION. VERIFY P...
Page 19 - ACCESSORY COMPONENTS; Standard ON/OFF Remote Control System; ELECTRONIC IGNITION WIRING DIAGRAM; Schematic Representation Only
19 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 Remote Control Kit, Standard Cat. No. Model No. Description H0249 RCL Std Remote Control System Unit ...
Page 20 - Barrier Screen Panel Kit; stalls over the standard glass enclosure panel; Style View Screen Doors
20 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 Barrier Screen Panel Kit This easy-to-install optional screen panel in- stalls over the standard glass enclosure panel and...
Page 21 - Ceramic Brickaded Panel Liner Kit
21 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 • Bag of Glowing Embers (Rockwool)• Bag of Decorative Volcanic Stone Order replacement Glowing Ember material (rockwool) o...
Page 22 - LIGHTING INSTRUCTIONS – MILLIVOLT GAS VALVE; FOR YOUR SAFETY READ BEFORE LIGHTING; property damage, personal injury or loss of life.; LIGHTING INSTRUCTIONS
22 LENNOX HEARTH PRODUCTS • MERIT ® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LIGHTING INSTRUCTIONS – MILLIVOLT GAS VALVE FOR YOUR SAFETY READ BEFORE LIGHTING WARNING: If you do not follow these instr...
Page 23 - INSTRUCTIONS D’ALLUMAGE – VANNE GAZ MILLIVOLT; POUR PLUS DE SÉCURITÉ, LIRE AVANT D’ALLUMER
23 LENNOX HEARTH PRODUCTS • MERIT ® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS REMARQUE : LES SCHÉMAS ET LES ILLUSTRATIONS NE SONT PAS À L’ÉCHELLE INSTRUCTIONS D’ALLUMAGE – VANNE GAZ MILLIVOLT POUR PLUS DE SÉCURITÉ, LIRE AVANT D’ALLUMER INSTRUCTIONS D’AL...
Page 24 - LIGHTING INSTRUCTIONS — ELECTRONIC; FOR YOUR SAFETY READ BEFORE OPERATING; Turn OFF all electric power to the appliance.; OPERATING INSTRUCTIONS; Electronic Gas Control
24 LENNOX HEARTH PRODUCTS • MERIT ® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LIGHTING INSTRUCTIONS — ELECTRONIC FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions ...
Page 25 - INSTRUCTIONS D’ALLUMAGE — ELECTRONIC; Veilleuse de; POUR PLUS DE SÉCURITÉ LIRE AVANT DE METTRE EN MARCHE; DEXEN
25 LENNOX HEARTH PRODUCTS • MERIT ® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS REMARQUE : LES SCHÉMAS ET LES ILLUSTRATIONS NE SONT PAS À L’ÉCHELLE INSTRUCTIONS D’ALLUMAGE — ELECTRONIC AVERTISSEMENT. Quiconque ne respecte pas à la lettre les instructions ...
Page 26 - Page; MAINTENANCE SCHEDULE
26 LENNOX HEARTH PRODUCTS • MERIT ® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS MAINTENANCE TASK ACCOMPLISHING PERSON PROCEDURE Inspect/Clean Burner, Logs, and Controls Qualified Service Technician Inspect valve and ensure it is properly operating. Check ...
Page 27 - SYMPTOM; Spark igniter will not light pilot after; WARNING: if the pilot will not light; B. Defective or misaligned electrode at pilot; TROUBLESHOOTING GUIDE – MILLIVOLT CONTROL SYSTEM
27 LENNOX HEARTH PRODUCTS • MERIT ® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS 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 minut...
Page 28 - TROUBLESHOOTING GUIDE – ELECTRONIC IGNITION SYSTEM
28 LENNOX HEARTH PRODUCTS • MERIT ® SERIES B-VENT GAS FIREPLACES • MODELS MLBV-35, MLBV-40 • CARE AND OPERATION INSTRUCTIONS TROUBLESHOOTING GUIDE – ELECTRONIC IGNITION SYSTEM SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION Check voltage on AC terminals of module an/or batteries. Voltage should be between...
Page 29 - REPLACEMENT PARTS LIST; can result in poor performance and safety hazards.; Gas Controls - SIT Millivolt; Dexen Gas; Gas Controls - Dexen Electronic
29 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 REPLACEMENT PARTS LIST WARNING Failure to position the parts in accordance with these diagrams or failure to use only part...
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