Lennox Merit MLDVTCD-35NM Installation Instructions Manual
Lennox Merit MLDVTCD-35NM Installation Instructions Manual

Lennox Merit MLDVTCD-35NM Installation Instructions Manual

Merit series direct-vent gas fireplaces

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P/N 506015-09 Rev. A 04/2013
This manual is one of a set of two supporting this product.
Refer to P/N 506017-08 for Care and Operation Instructions.
Ce manuel est disponible en francais, simplement
en faire la demande. Numéro de la pièce 506223-60.
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.
This appliance may be installed in an aftermarket permanently located, manufactured home (USA only) or mobile
home, where not prohibited by local codes. This appliance is only for use with the type of gas indicated on the
rating plate. This appliance is not convertible for use with other gases, unless a certified kit is used.
WARNING / AVERTISSEMENT / AVISO
• HOT GLASS WILL CAUSE
BURNS.
• DO NOT TOUCH GLASS
UNTIL COOLED.
• NEVER ALLOW CHILDREN
TO TOUCH GLASS.
WARNING: If the information in these instructions
is not followed exactly, a fire or explosion may
result, causing property damage, personal injury,
or death.
- 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.
INSTALLATION INSTRUC TIONS
MLDVTCD Direct-Vent
Gas Fireplaces
MODELS
MILLIVOLT:
MLDVTCD-35NM
MLDVTCD-35NM-FB
Report No. 100353019PRT-002
Please read and understand these instructions
before starting installation.
• 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.
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.
- 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.
ELECTRONIC:
MLDVTCD35NE-2
MLDVTCD-35NE-FB
• EL VIDRIO CALIENTE
CAUSARÁ QUEMADURAS.
• USTED DEBE NUNCA
TOCAR EL VIDRIO CALIENTE.
• LOS NIÑOS DEBEN NUNCA
TOCAR EL VIDRIO.

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Summary of Contents for Lennox Merit MLDVTCD-35NM

  • Page 1 INSTALLATION INSTRUC TIONS MLDVTCD Direct-Vent ™ Gas Fireplaces MODELS MILLIVOLT: ELECTRONIC: P/N 506015-09 Rev. A 04/2013 MLDVTCD-35NM MLDVTCD35NE-2 This manual is one of a set of two supporting this product. MLDVTCD-35NM-FB MLDVTCD-35NE-FB Refer to P/N 506017-08 for Care and Operation Instructions. Ce manuel est disponible en francais, simplement en faire la demande.
  • Page 2: Table Of Contents

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® TABLE OF CONTENTS PACKAGING GENERAL INFORMATION The assembled vented gas fireplace heater Packaging ......2...
  • Page 3 LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS Codes and Standards WARNING WARNING These appliances comply with National Safety Standards and are tested and Improper installation, Failure to position the parts in listed by ETL/Intertek. (Report No.
  • Page 4: Requirements For The Commonwealth Of Massachusetts

    LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS Gas Pressure Massachusetts if the following additional The appliance and its appliance main gas requirements are met: valve must be disconnected from the gas Table 2 and Table 3 show the appliance supply piping system during any pressure •...
  • Page 5: Manufactured Home Requirements

    LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS MANUFACTURED HOME LOCATION The minimum height from the base of the REQUIREMENTS appliance to the underside of combustible In selecting the location, the aesthetic and materials used to construct a utility shelf in...
  • Page 6: Vent Termination Clearances

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® VENT TERMINATION CLEARANCES Horizontal Vent Figure 5: Vertical Vent Termination Termination Clearances Clearances These instructions should be used The horizontal vent termination must have as a guideline and do not supersede...
  • Page 7 LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Table 6: Exterior Horizontal Vent Termination Clearances NOTE: Local Codes Or Regulations May Require Different Clearances. See Item D in the Text Below. NOTE: Location Of The Vent Termination...
  • Page 8: Minimum Clearance To Combustibles

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® MINIMUM CLEARANCE TO Table 8: Shelf Height Minimum Clearances COMBUSTIBLES The appliance is approved with zero Do not insulate the clearance to combustible materials on...
  • Page 9: Pre-Installation Steps

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® PRE-INSTALLATION STEPS TYPICAL INSTALLATION SEQUENCE DETAILED INSTALLATION STEPS The appliance is shipped with all gas The typical sequence of installation is Follow these steps to complete fireplace controls and components installed and pre- outlined below;...
  • Page 10: Fireplace And Framing Specifications

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Table 9: Fireplace Framing Specifications Model Framing should be constructed Inches (mm) of 2x4 or larger lumber 35 1/4 35 1/4 38 3/4 10-1/2 VENT FRAMING -...
  • Page 11: Routing Gas Line

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Table 11: Fireplace Specifications NOTE: It is recommended that the gas be stubbed in from the left side only. EYEBROW ELECTRICAL INLET HOOD KNOCKOUT - 2-3/4 X 2...
  • Page 12: Installing The Venting System

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Install the Vent System Select Venting System— Table 13: Schedule 40 Black Iron Pipe— Horizontal or Vertical Inside Diameter These instructions should be used as a guideline and do not supersede...
  • Page 13: Vent Section Length Chart

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Vertical (Straight) Installation Table 14: Vent Section Length Table 14: Vent Section Length Determine the number of straight vent Nominal Nominal Section Length Section Length sections required: (in.)
  • Page 14 LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Vertical (Offset) Installation (Figure 15). and attic or ceiling insulation when running vertical chimney sections. Analyze the vent routing and determine the All of the appliances covered in this...
  • Page 15 LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® 6. Change vent direction to horizontal/ are aligned with the inlets of the four Table 16: Framing Dimensions for Roof inclined run—At transition from or incline channels of the last vent section.
  • Page 16: Vertical Vent Tables And Figures

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Vertical Vent Tables and Figures Table 17: Top Vent—Two 90° Elbows NOTE: Secure Vent rigid vent pipe ® is shown in the figures. Secure Flex ®...
  • Page 17 LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Table 18: Top Vent—Three Elbows H + H Maximum V Minimum feet meters feet meters Ceiling 1.524 Elbow Only Firestop/Spacer Wall SV4.5VF* 1.524 0.305 Firestop/Spacer SV4.5HF**...
  • Page 18: Horizontal Termination System

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Horizontal Termination System adjusting the radial alignment until the 8. Change vent direction—At transition four locking dimples are aligned with from or to a horizontal/inclined run,...
  • Page 19 LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® 11. Attach termination adaptor—Attach Figure 21: Typical Horizontal Vent Installation the adaptor (SV4.5RCH, provided with TYPICAL HORIZONTAL VENT INSTALLATION the termination) to the vent section...
  • Page 20: Horizontal Vent Tables And Figures

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Horizontal Vent Tables and Figures Table 20: Top Vent—One 90° Elbow, Elbow Connection at Appliance NOTE: Secure Vent components (rigid vent ® pipe and terminal) are shown in the figures;...
  • Page 21 LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Table 22: Top Vent—Two 90° Elbows H + H Maximum V Minimum Wall Firestop/Spacer SV4.5HF** feet meters feet meters 0.914 Elbow Only 1.524 0.305 3.048 0.610...
  • Page 22: Venting Using Flexible Vent Pipe

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Venting Using Flexible Vent Pipe Figure 24: Attaching the Flexible Vent Secure Flex venting kits and components ® FLEX VENT NOTE: OUTER PIPE IS PULLED AWAY TO...
  • Page 23: Field Wiring

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Field Wiring NOTE: The supplied 15 ft of Electronic Wiring 2-conductor wire has one end of One of the following optional controls may each conductor connected to the gas...
  • Page 24: Optional Blower Kit Wiring

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® 7. If an optional control is to be used, wire Wire the [Optional] Blower Kit After Connect the Gas Line Installation in the Framing it in the low voltage circuit as shown in All codes require a shut-off valve mounted Figure 27.
  • Page 25: Verifying Appliance Operation

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® as indicated in the instruction manual. Figure 29: Gas Line Connection Subsequent lighting of the appliance will not require such purging. Inspect the pilot Optional Gas Flex Line Connector flame (remove logs, if necessary, handling 3/8 NPT x 3/8 in.
  • Page 26: Installing Logs

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Install the Contemporary Media Tumbled River Stone (MTRS) Table 24: Contemporary Media Catalog Model NOTE: Refractory panels should be installed Description Number Number WARNING before the contemporary media is installed.
  • Page 27 LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Table 25: MLDVTCD-35 Firebox Liner and Contemporary Media Placement Rear Zen Garden Panel Burner Outlet Tumbled River Stone NOTE: River Stone And Beach Sand May Be Used Together...
  • Page 28: Removing/Installing Glass Door

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Install the Glass Door Open the lower control compartment door Adjust the Burner (Page 24). Flame Appearance and Sooting Position the glass door in front of the...
  • Page 29 LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Figure 34: Burner Flame Appearance, MLDVTCD-35 WARNING • Air shutter adjustment should only be performed by a qualified professional service technician. • Ensure front glass panel in place and sealed during adjustment.
  • Page 30: Installing Hood

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Install the Hood Finishing Requirements NOTE: When raising the MLDVTCD appliance on a platform for mid-wall All models must have a hood installed prior This contemporary unit is uniquely suited installations, add the platform height to any to operation.
  • Page 31: Attaching Safety-In-Operation Warnings

    If you are unable to locate the labels, please parlée dans la résidence du propriétaire. En call Lennox Hearth Products or your nearest Si no puede encontrar las etiquetas, sírvase cas de doute, collez l’étiquette en anglais.
  • Page 32: Installation Accessories

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® INSTALLATION ACCESSORIES ® ® Listed Secure Vent Components Listed Secure Vent Components Catalog Model Description Catalog Model Description Number Number The following flashing comes packaged with a storm collar...
  • Page 33 LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® ® ® Listed Secure Flex Components Listed Secure Flex Components Catalog Catalog Model Description Model Description Number Number These termination kits include firestop/spacer, gear clamps, and flex adaptor.
  • Page 34: Gas Conversion Kits

    LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® GAS CONVERSION KITS In Canada: Table 28: Millivolt SIT Systems, THE CONVERSION SHALL BE CARRIED Natural Gas To Propane Gas OUT BY A MANUFACTURER’S Conversion Kits...
  • Page 35 LENNOX HEARTH PRODUCTS • MERIT SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Installing Gas Conversion Kits Figure 37: Millivolt Valve Figure 40: Electronic Pilot Regulator Conversion Ignitor WARNING Igniter Pilot Hood The gas supply shall be shut...
  • Page 36 SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS ® Lennox Hearth Products reserves the right to make changes at any time, without notice, in design, materials, specifications, prices and also to discontinue colors, styles and products. Consult your local distributor for fireplace code information.

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