Lennox Merit Series

™
CARE AND OPERATION INSTRUCTIONS
P/N 506017-02 Rev. F 06/2011
This manual is one of a set of three supporting this product. Refer to P/N
506015-03 for Installation Instructions and 506019-40 for additional instructions.
Ce manuel est disponible en francais, simplement en faire la demande.
Numéro de la pièce 506223-06.
MODELS
MLDVTCD-35NM
MILLIVOLT:
MLDVTCD-35NE
ELECTRONIC:
Report No. 100353019PRT-002
MLDVTCD Direct-Vent
Contemporary Design
Gas Fireplaces
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.
DON’T
THROW
IT AWAY!
This manual contains
important operating
and safety
information.
Wait...
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See Page 2 For Details
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SAFETY
GUARD
PROTECTS AGAINST BURNS
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
WHAT'S INSIDE
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.

Lennox Merit Series Specifications

General

Efficiency	Up to 80% AFUE
Heating Stages	Single-stage
Fuel Type	Natural Gas or Propane
Ignition System	Hot Surface Ignition
Blower Motor	PSC
Warranty	5-Year Limited Parts Warranty
Heating Capacity	44, 000 to 132, 000 BTU/h

Summary

General Safety Warnings

Safety and Your Fireplace

Free Safety Guard Offer

Details of a promotional offer for a protective safety guard to prevent burns.

Extreme Surface Heat Hazard

Information about the extreme temperatures of fireplace surfaces and necessary precautions.

Important Safety Information

Attaching Safety-in-Operation Warnings

Attaching Safety Labels

Instructions on how to affix safety labels to controls and transmitters.

Appliance Installation, Service, and Maintenance Notices

Appliance Operation Notices

Warranty Information

General Information

Gas Pressure Requirements

Details gas pressure requirements for all models, including tables for inlet and manifold pressures.

Orifice Sizes and Deration

Specifies orifice sizes for different altitudes and explains deration requirements.

Burn-in Period

Explains the initial burn-in process, potential odors, and precautions.

Operation and Care of Your Appliance

Gas Controls and Compartment Access

Details on accessing the gas controls and removing the control compartment door.

Millivolt Appliance Operation

Information specific to operating millivolt gas control systems.

Electronic Appliance Operation

Information specific to operating electronic gas control systems.

Electronic Appliance Lighting and Operation

Variable Flame Height Adjustment

Instructions on how to adjust the flame height using the control knob.

Appliance Maintenance

Cleaning Procedures

Steps for cleaning glass, gasket, control compartment, sub-floor, and burner.

Inspection Procedures

Guidance on inspecting wiring connections and burner flame appearance.

Media Replacement and Touch-up

Instructions for replacing media and performing paint touch-ups.

Front Glass Enclosure Panel, Removal and Installation

Installing Contemporary Media

Install Zen Garden Refractory Panels

Instructions for installing Zen Garden refractory panels into the firebox.

Install Tumbled River Stone

Guidance on placing tumbled river stones onto the firebox sub-floor.

Install Crushed Glass and Sand

Instructions for pouring glass or sand onto the firebox sub-floor.

Install Contemporary Facade

Reference to instructions for installing the contemporary facade kit.

Burner Adjustments

Flame Appearance and Sooting

Describes proper flame appearance and identifies causes and indicators of sooting.

Air Shutter Adjustment Guidelines

Provides guidelines and a chart for adjusting air shutter openings for optimal flame.

Burner Air Shutter Adjustment Procedure

Millivolt Appliance Checkout

Checks for proper pilot flame appearance and operation in millivolt systems.

Electronic Appliance Checkout

Checks for proper pilot and igniter operation in electronic ignition systems.

Ordering Replacement Parts

Product Reference Information

Section to record model, serial number, date installed, and dealer information.

Wiring Diagrams

Reference diagrams for millivolt and electronic ignition system wiring.

Accessory Components

Thermostat and Remote Control Systems

Details on digital thermostats and standard/deluxe remote control systems.

Wall Switches and Unit-Mounted Controls

Information on rocker switches and wall switch kits for appliance control.

Optional Accessory Components

Screen Panel Kits and Doors

Details on pull screen, style view screen doors, and barrier screen panel kits.

Contemporary Facade Kit

Information on the optional contemporary facade kit for the fireplace.

Additional Accessory Components

Media and Refractory Panels

Details on contemporary media bags and the Zen Garden Refractory Panel Kit.

Airflow and Finishing Accessories

Information on forced air kits, touch-up paint, and vent termination guards.

Lighting Instructions - Millivolt Gas Valve

Turning Off Gas to Appliance

Steps for safely turning off the gas supply to the millivolt appliance.

Operating Instructions - Electronic

Shutting Off the Appliance

Procedures for safely shutting off the electronic appliance.

Turning Off Gas to Appliance

Steps for safely turning off the gas supply to the electronic appliance.

Maintenance Schedule

Troubleshooting the Millivolt Control System

Troubleshooting the Electronic Ignition System

Replacement Parts List