Lennox MPD-3530CNM-B Installation Instructions Manual

Lennox MPD-3530CNM-B Installation Instructions Manual

Merit plus series mpd direct-vent gas fireplaces

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P/N 850014 Rev. V 08/2011
This manual is one of a set of two supporting this product.
Refer to P/N 875014M for Care and Operation Instructions.
Ce manuel est disponible en francais, simplement
en faire la demande. Numéro de la pièce 850014CF.
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
MPD Direct-Vent
Gas Fireplaces
MODELS
MILLIVOLT:
MPDT-3328CNM-B
MPDT-3328CPM-B
MPDR-3328CNM-B
MPDR-3328CPM-B
MPD-3530CNM-B
MPD-3530CPM-B
OTL Report No. 116-F-13-4
Please read and understand these instructions
• 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.
MPD-4035CNM-B
MPDT-3328CNE-B
MPD-4035CPM-B
MPDT-3328CPE-B
MPD-4540CNM-B
MPDR-3328CNE-B
MPD-4540CPM-B
MPDR-3328CPE-B
MPD-3530CNE-B
MPD-3530CPE-B
Portland
US
before starting installation.
• EL VIDRIO CALIENTE
CAUSARÁ QUEMADURAS.
• USTED DEBE NUNCA
TOCAR EL VIDRIO CALIENTE.
• LOS NIÑOS DEBEN NUNCA
TOCAR EL VIDRIO.
ELECTRONIC:
MPD-4035CNE-B
MPD-4035CPE-B
MPD-4540CNE-B
MPD-4540CPE-B

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Do you have a question about the MPD-3530CNM-B and is the answer not in the manual?

Questions and answers

Teri Dumeyer
January 24, 2025

How do I relight my pilot light? My Lennox fireplace is P/N 506018-47.

Phonch drievold
January 27, 2025

Pilot light is on, lennox fireplace isn't working. Model mpd3530cnm

1 comments:
Mr. Anderson
February 10, 2025

The Lennox MPD-3530CNM fireplace may not be working despite the pilot light being on due to issues such as a clogged or incorrect orifice, improper gas line connections, or damaged components like the ignitor assembly. The installation instructions suggest checking the pilot orifice and replacing it if necessary, ensuring that all pipe fittings are properly sealed with the correct compounds, and verifying that the pilot assembly is securely mounted. If the problem persists, inspecting the gas flow and verifying the venting system for blockages may help resolve the issue.

This answer is automatically generated

Irene Thompson
March 14, 2025

Cleaning the glass door

Philip J De Sarno
March 26, 2025

Sir/Madam 3/26/2025 Hello, I would like to change the venting on a Lennox (MPD4540CNM-B) from rear vent possibly to a top vent. I have a customer who has a problem with the height of the termination cap outside of his house. People hit their heads when walking by at night. The fireplace is currently in operation. It is rear vented horizontally thru the wall. From the rear of the cabinet to the inside of wall is 10". I would like to move the termination cap up approx. 2’ I need to know what I need to gain that 2' of height at the cap. I don't know what is on top of the cabinet. Have not opened the wall yet. My thoughts: Option 1 Cap off rear opening Open top opening Install starter collar (don’t know) Install 1’ pipe vertical Install elbow Install pipe to the termination cap Option 2 (have 10” between wall and FP cabinet) At rear install elbow facing up Install vertical pipe (approx. 3’) Install elbow Install horizontal pipe to the termination cap Thanks Phil Phone—732-600-9260 Email---makinwaves6@gmail.com

Summary of Contents for Lennox MPD-3530CNM-B

  • Page 1 MPD-4540CNE-B Ce manuel est disponible en francais, simplement MPDR-3328CPM-B MPD-4540CPM-B MPDR-3328CPE-B MPD-4540CPE-B en faire la demande. Numéro de la pièce 850014CF. MPD-3530CNM-B MPD-3530CNE-B MPD-3530CPM-B MPD-3530CPE-B Portland INSTALLER: Leave this manual with the appliance. CONSUMER: Retain this manual for future reference.
  • Page 2: Table Of Contents

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® PACKAGING GENERAL INFORMATION TABLE OF CONTENTS The assembled vented gas fireplace heater is Packaging ............ 2 WARNING packaged with: Introduction ..........2 • (1 set) Logs (packaged in a carton inside the General Information ........
  • Page 3 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Note: Installation and repair should be done The appliance, when installed, must be electri- WARNING by a qualified service person. The appliance cally grounded and wired in accordance with...
  • Page 4: Requirements For The Commonwealth Of Massachusetts

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Gas Pressure - All Models For elevations above 4500 feet, contact your gas supplier or qualified service technician. Electronic Tables 2 and 3 show the appliances' inlet and...
  • Page 5: Cold Climate Insulation

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® COLd CLIMATE INSULATION For cold climate installations, seal all cracks around your appliance with noncombustible material and wherever cold air could enter the room. It is especially important to insulate...
  • Page 6: Vent Termination Clearances

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® VenT TerminaTion ClearanCes Vertical Vent Termination Clearances The vent / air intake termination clearances These instructions should be used as a above the high side of an angled roof are as...
  • Page 7 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® EXTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS NOTE: Local Codes Or Regulations May Require Different Clearances. See Item D in the Text Below. NOTE: Location Of The Vent Termination...
  • Page 8: Appliance And Vent Clearances

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® MINIMUM CLEARANCES TO COMBUSTIBLES MINIMUM CLEARANCES Inches (millimeters) Appliance And Vent Clearances Back 1/2 in. (13) 0 (0) from Spacers Or dimples The appliance is approved with zero clearance to combustible materials Sides 1/2 in.
  • Page 9 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Wall Finishes / Surrounds / Mantels Note: Combustible wall finish materials and/or surround materials must not be allowed to encroach the area defined by the appliance front face (black sheet metal).
  • Page 10: Pre-Installation Steps

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® dETAILEd INSTALLATION STEPS PRE-INSTALLATION STEPS TYPICAL INSTALLATION SEQUENCE The typical sequence of installation is outlined Step 1. FRAMING The appliance is shipped with all gas controls below;...
  • Page 11: Fireplace And Framing Specifications

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® FIREPLACE ANd FRAMING SPECIFICATIONS Framing VENT FRAMING: Framing should be TOP VENT WITH ONE constructed of 2x4 10-1/2 90° ELBOW or larger lumber. . n i...
  • Page 12: Step 2. Routing Gas Line

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® FIREPLACE FRAMING SPECIFICATIONS . n i MPD and MPDR units . n i 7" MPD and MPDT units (178 mm) . n i . n i Note: •...
  • Page 13: Step 3. Preparing Appliance Vent Collar

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Step 3. PREPARING APPLIANCE VENT Use only approved vent components (see Select Venting System - Horizontal or Vertical Approved Vent Components on Page 2). COLLAR (...
  • Page 14: Vertical Termination Systems

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® VERTICAL TERMINATION SYSTEMS (ROOF) i t c See Figure 20 and Figures 30 through 32 i t c on Page 17 and their associated Vertical...
  • Page 15 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Vertical (Offset) Installation All of the appliances covered in this document Push the vent component against the previous section until it fully engages, then twist the...
  • Page 16 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® F. Change vent direction to horizontal/inclined run - At transition from or to a horizontal/in- Storm clined run, install the SV4.5E45 and SV4.5E90 Collar elbows in the same manner as the straight vent sections.
  • Page 17: Vertical Vent Tables And Figures

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® VERTICAL VENT FIGURES/TABLES TABLE A Ceiling Note: Secure Vent (rigid vent pipe) is shown Firestop/Spacer H Maximum V Minimum SV4.5VF* in the figures; Secure Flex (flexible vent pipe)
  • Page 18 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® VERTICAL VENT FIGURES/TABLES (continued) TABLE C Maximum H Maximum V Minimum (meters) (meters) (meters) feet feet feet (1.524) (0.610) (0.305) Ceiling Firestop/Spacer (3.048) (1.219) (0.610) SV4.5VF*...
  • Page 19: Horizontal Termination System

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® HORIZONTAL (OUTSIdE WALL) TYPICAL HORIZONTAL VENT INSTALLATION TERMINATION SYSTEM Support Horizontal / Inclined Run Building Figures 35, and Figures 39 to 44 on pages Brackets SV4.5HT-2...
  • Page 20 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® j. Assemble vent run to exterior wall - If not Firestop/Spacer (SV4.5HF) shown previously measured, locate the center of the on the exterior side of the wall. It vent at the exterior wall.
  • Page 21: Horizontal Vent Tables And Figures

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® HORIZONTAL VENT FIGURES/TABLES TABLE F Note: Secure Vent components (rigid vent pipe and terminal) are H Maximum V Minimum shown in the figures; Secure Flex components (flexible vent pipe and terminal) may also be used.
  • Page 22 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® HORIZONTAL VENT FIGURES/TABLES (continued) TABLE H Maximum H Maximum V Minimum (meters) (meters) feet (meters) feet feet (1.524) (0.610) (0.305) (3.048) (1.219) (0.610) Ceiling (4.572) (1.829)
  • Page 23 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® HORIZONTAL VENT FIGURES/TABLES (continued) TABLE K Wall Firestop/Spacer Maximum H Maximum V Minimum SV4.5HF** feet (meters) feet (meters) feet (meters) (1.524) (0.610) (0.305) (3.048) (1.219) (0.610)
  • Page 24: Venting Using Flexible Vent Pipe

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® VERTICAL OR HORIZONTAL VENTING USING SECuRE FlEx KITS ANd COMPONENTS FLEX VENT NOTE: OUTER PIPE IS PULLED AWAY TO Secure Flex venting kits and components may...
  • Page 25: Step 5. Field Wiring

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Step 5. FIELd WIRING Refer to Section A for millivolt appliances and Electronic Wiring Diagram (Honeywell) Section B for electronic appliances. The gas Showing the Blower Wiring for the Optional...
  • Page 26: Step 6. Optional Blower Kit Wiring

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® BLOWER CONTROL CIRCUIT WIRING Note: Remote receiver should be located in the A sediment trap is recommended in the gas 120V, 60HZ, 1PH wall, or if installed in the control compartment,...
  • Page 27: Step 8. Verifying Appliance Operation

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Subsequent lighting of the appliance will not Optional Gas Flex Line Connector require such purging. Inspect the pilot flame (remove logs, if necessary, handling carefully).
  • Page 28: Step 9. Installing Logs

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Step 9. INSTALL VOLCANIC STONE, Glowing Embers GLOWING EMBERS ANd LOGS NOTE: Turn off all electricity to the appliance before you install volcanic stone, embers and logs.
  • Page 29: Mpd-3328 Log Placement

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® MPd-3328 LOG PLACEMENT Number description (Stamped #) Log, Rear (39-12) Log, Left (39-1) Log, Right (39-2) Log, Top Center (39-13) Log, Top/Left (39-3 ) Log, Top/Right (39-4) Catalog Number for the entire log set: 24M15 Position the individual logs as shown below.
  • Page 30: Mpd-3530 Log Placement

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® MPd-3530 LOG PLACEMENT Number description (Stamped #) Log, Rear (39-5) Log, Left (39-1) Log, Right (39-2) Log, Top Center (39-6) Log, Top/Left (39-3) Log, Top/Right (39-4) Catalog Number for the entire log set: 24M22 Position the individual logs as shown below.
  • Page 31: Mpd-4035/4540 Log Placement

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® MPd-4035 ANd MPd-4540 LOG PLACEMENT Number description (Stamped #) Log, Center (39-8) Log, Rear (138) Log, Right (39-10) Log, Left (39-9) Log, Top/Left (39-11) Log, Top/Right (39-11) Catalog Number for the entire log set: 24M25 Position the individual logs as shown below.
  • Page 32: Step 10. Remove/Install Glass Door

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Step 10. REMOVING ANd INSTALLING Step 11. BURNER AdjUSTMENTS Removing the Glass Enclosure Panel (see Figure 60 ) THE GLASS dOOR Flame Appearance and Sooting...
  • Page 33 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® WARNINGS • Air shutter adjustment should only be performed by a quali- fied professional service tech- nician. • Ensure front glass panel are in place and sealed during adjustment.
  • Page 34: Step 12. Hood Installation

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Step 12. HOOd INSTALLATION Combustible Finished Wall Refer to Figures 65 and 66. All models must This area must remain Materials clear of combustible have hoods installed prior to operating.
  • Page 35: Step 13. Attaching Safety-In-Operation Warnings

    3. Si no puede encontrar las etiquetas, sírvase llamar a taire. En cas de doute, collez l’étiquette en anglais. Lennox Hearth Products o al distribuidor de Lennox 3. If you are unable to locate the labels, please call 3. Si vous ne trouvez pas les étiquettes, veuillez Hearth Products más cercano para recibir etiquetas...
  • Page 36: Installation Accessories

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® INSTALLATION ACCESSORIES Listed Secure Vent™ Components Listed Secure Vent™ Components Cat. No. Model description Cat. No. Model description 77L70 SV4.5L6 6 Inch (152 mm) H1968 SV4.5HT-2...
  • Page 37 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® INSTALLATION ACCESSORIES CONTINUEd Listed Secure Flex™ Components Listed Secure Flex™ Components Cat. # Model description Cat. # Model description These termination kits include firestop/spacer, gear clamps and flex adaptor.
  • Page 38: Gas Conversion Kits

    LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® GAS CONVERSION KITS Electronic HONEYWELL Systems Natural Gas To Propane Gas WARNING Conversion Kits Models Catalog No. This conversion kit shall be installed by a qualified service agency in accordance with the manufacturer’s instructions and all applicable codes...
  • Page 39 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Step 2. Carefully remove the logs. Exercise Millivolt Appliances Electronic Appliances care so as not to break the logs. Step 4. SIT Systems - Refer to Figure 68 and Step 7.
  • Page 40 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® See Figure 71 and replace the pilot orifice as All Models follows: Remove the ignitor assembly retainer clip, and carefully remove the ignitor assembly. Use pipe joint compound or Teflon tape on all...
  • Page 41 LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® NOTES NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
  • Page 42 PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS ® Lennox Hearth Products reserves the right to make changes at any time, without notice, in design, materials, specifications, and prices, and also to discontinue colors, styles, and products. Consult your local distributor for fireplace code information.

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