Lennox MLDVT-30NM Installation Instructions Manual

Direct vent mldvt-30/35/40/45 series

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This appliance may be installed in an aftermarket per-
manently 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.
In the Commonwealth of Massachusetts:
Installation must be performed by a licensed plumber or
gas fitter;
• See Table of Contents for location of additional Com-
monwealth of Massachusetts requirements.
Portland
US
WARNING: IF THE INFORMATION IN THIS MANUAL
IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLO-
SION MAY RESULT CAUSING PROPERTY DAMAGE,
PERSONAL INJURY OR LOSS OF LIFE.
Do not store or use gasoline or other flammable
vapors or liquids in the vicinity of this or any
other appliance.
WHAT TO DO IF YOU SMELL GAS:
• Do not 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 your gas supplier's
instructions.
• If your gas supplier cannot be reached, call
the fire department.
Installation and service must be performed by
a qualified installer, service agency or the gas
supplier
.
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 con-
sultation ultérieure.
OTL Report No. 6-F-57-5
INSTALLATION
INSTRUCTIONS

DIRECT VENT

MLDVT-30/35/40/45 SERIES
VENTED GAS FIREPLACE HEATERS - DIRECT VENT MODELS
P/N 50605-02 REV. A 06/2009
MODELS
Millivolt Models
MLDVT-30NM
MLDVT-30PM
MLDVT-35NM
MLDVT-35PM
MLDVT-40NM
MLDVT-40PM
MLDVT-45NM
MLDVT-45PM
AVERTISSEMENT: ASSUREZ-VOUS DE BIEN
SUIVRE LES INSTRUCTIONS DONNÉES DANS
CETTE NOTICE POUR RÉDUIRE AU MINIMUM LE
RISQUE D'INCENDIE D'EXPLOSION OU POUR
ÉVITER TOUT DOMMAGE MATÉRIEL, TOUTE
BLESSURE OU LA MORT.
Ne pas entreposer ni utiliser d'essence ni d'autre
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 aucun interrupteur. Ne pas vous
servir des téléphones se trouvant dans le báti-
ment où vous 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 incendies.
L'installation et l'entretien doivent être assurés
par un installeur ou un service d'entretien qualifié
ou par le fournisseur de gaz.
A French manual is available upon request. Order P/N 506223-03
Ce manuel d'installation est disponible en francais, simplement en
faire la demande. Numéro de la pièce 506223-03.
Electronic Models
MLDVT-30NE
MLDVT-35NE
MLDVT-40NE
MLDVT-45NE


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Summary of Contents for Lennox MLDVT-30NM

  • Page 1: Installation Instructions

    This appliance is not convertible for use MODELS with other gases, unless a certified kit is used. Millivolt Models Electronic Models In the Commonwealth of Massachusetts: MLDVT-30NM MLDVT-30NE Installation must be performed by a licensed plumber or • MLDVT-30PM MLDVT-35NE gas fitter;...
  • Page 2: Table Of Contents

    TABLE OF CONTENTS PACKAGING WARNING: IMPROPER INSTALLA- TION, ADJUSTMENT, ALTERATION, Packaging .........Page 2 The assembled vented gas fireplace heater is SERVICE OR MAINTENANCE CAN packaged with: Introduction ........Page 2 CAUSE INJURY OR PROPERTY General Information ......Page 2 1 - One log set located in firebox area. DAMAGE. FOR ASSISTANCE OR Requirements for the 2 - One envelope containing the literature pack- ADDITIONAL INFORMATION CON- Commonwealth of Massachusetts .Page 4 age which consists of the care and opera- SULT A QUALIFIED INSTALLER, New York City Approval .
  • Page 3 Provide adequate clearances around air open- These appliances must not be connected to a Inlet Gas Supply Pressure ings and adequate accessibility clearance for chimney or flue serving a separate solid fuel (all models) service and proper operation. Never obstruct burning appliance. the front openings of the appliance. Fuel # Minimum Maximum Orifice Sizes - Sea Level to High Altitude 4.5" WC 0.5" WC These appliances are designed to operate on Natural Gas (All Models) (.2 kPa) (2.6 kPa) natural or propane gas only.
  • Page 4: Commonwealth Of Massachusetts

    Dexen Electronic Gas Valve Note: When the unit is installed with one side flush with a wall, the wall on the other Supply Pressure-Tap Regulator Burner Stage (Manifold) Mounting Screw Terminal side of the unit must not extend beyond the Inlet front edge of the unit.
  • Page 5: Manufactured Home Requirements

    Be aware that this is a heat producing ap- VENT TERMINATION CLEARANCES pliance. Objects placed above the unit are exposed to elevated temperatures. These instructions should be used as a guideline and do not supersede local codes in any way. Install vent according to local codes, these instructions, the current National Fuel Gas Code Do not insulate the space between the appli- (ANSI-Z223.) in the USA or the current standards of CAN/CSA-B49. in Canada.
  • Page 6 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 Inside Exterior Wall Must Not Interfere With Access To The Corner Detail Electrical Service.
  • Page 7: Appliance And Vent Clearances

    MINIMUM CLEARANCES TO COMBUSTIBLES Appliance and Vent Clearances Hearth Extension A hearth extension is not required with this appliance. If a hearth extension is used, do not block the lower control compartment door. Any hearth extension used is for appear- The appliance is approved with zero clearance to ance only and does not have to conform to standard hearth extension installation requirements. combustible materials on all sides (as detailed in Table 6 ), with the following exception: When Wall Finishes / Surrounds / Mantels the unit is installed with one side flush with a Note: Combustible wall finish materials and/or surround materials must not be allowed to en- wall, the wall on the other side of the unit must croach the area defined by the appliance front face (black sheet metal). Never allow combustible not extend beyond the front edge of the unit.
  • Page 8: Detailed Installation Steps

    DETAILED INSTALLATION STEPS Step 7. (Page 25) Checkout appliance opera- tion. Step 8. (Page 26) Install the logs, decorative The appliance is shipped with all gas controls volcanic stone and glowing embers. and components installed and pre-wired. Re- Step 9. (Page 30) Install glass door frame move the shipping pad, exposing the front glass assembly. door. Remove control panel per instructions Step 0. (Page 30) Adjust burner to ensure on Page 24. Open the two latches (located proper flame appearance. under the firebox floor) securing the glass Step . (Page 32) Install the hoods.
  • Page 9: Fireplace Specifications

    FIREPLACE SPECIFICATIONS Framing Framing should be constructed of 2x4 or larger lumber Framing Dimensions VENT FRAMING - 0-/2 TOP VENT WITH ONE Model No. 90 ° ELBOW 30-/4 35-/4 39-/4 MLDVT-30 35-/4 35-/4 39-/4 MLDVT-35 (78) 5-/8 40-/4 40-/4 44-/4 (30) 2-/8 MLDVT-40...
  • Page 10 FIREPLACE FRAMING SPECIFICATIONS 30 1/4 53 3/16 12 1/4 37 29/32 26 13/16 MLDVT-30 1350 7 (78) 35 1/4 57 1/2 40 5/8 28 3/4 13 3/4 MLDVT-35 1461 1032 40 1/4 61 13/16 43 11/32 15 1/8 30 11/16 MLDVT-40 1022 1554 1101 45 1/4 32 5/8 66 1/8 46 1/16 16 1/2 MLDVT-45 1149 1680 1170 Back wall of chase/enclosure Inches (including any finishing materials) (millimeters)
  • Page 11: Step 3. Install The Venting System

    Step 3. INSTALL THE VENT SYSTEM Installation of Vent Restrictor Vent Restrictor Installation (Top Vent) A vent restrictor may be needed with this General Information appliance. The restrictor is installed in the A vent restrictor may be needed when vertical- appliance top flue outlet as shown in Figure These instructions should be used as a ly terminating the vent system above the roof...
  • Page 12: Vertical Termination Systems

    VERTICAL TERMINATION SYSTEMS (ROOF) i t c i t c See Figure 15 on Page 12 and Figures 23- i t c 25 on Pages 15 and 16 and their associated i t c Vertical Vent Tables which illustrate the various vertical venting configurations that are possible for use with these appliances. Secure Vent pipe applications are shown in these Figures; Secure Flex pipe may also be used. A Vertical Vent Table summarizes each system’s minimum and maximum vertical and horizontal length values that can be used to design and install the vent...
  • Page 13 Maintain a minimum " (25 mm) clearance to C. Attach vent components to each other - Other Effective Vent Length combustible materials for all vertical elements. vent sections may be added to the previously Model Effective Length Clearances for all horizontal elements are 3" installed section in accordance with the require- ments of the vertical vent Figures and Tables. (76 mm) on top, " (25 mm) on sides and " SV4.5L6 4-/2"...
  • Page 14: Vertical Vent Tables And Figures

    E. Support the vertical vent run sections - It is important to maintain the required clear- J. Install the storm collar - Install the storm Note - Proper venting support is very important. ances to combustibles: 1" (25 mm) at all sides collar, supplied with the flashing, over the for all vertical runs;...
  • Page 15 Notes: • It is very important that the horizontal/inclined run be maintained in a straight (no dips) and recommended to be in a slightly elevated plane, in a direction away from the fireplace of 1/4" rise per foot (20 mm per meter) which is ideal, though rise per foot run ratios that are smaller are acceptable all the way down to at or near level.
  • Page 16: Horizontal Termination System

    VERTICAL VENT FIGURES/TABLES (CONTINUED) Example: If 20 feet total (H+H Table B horizontal vent run is needed, then V Minimum Maximum 4 feet minimum of (V) vertical vent Ceiling will be required. Firestop / Spacer feet (meter) feet (meter) (SV4.5VF) Wall Firestop/ This table shows a 1(V) to 5(H) (.524)
  • Page 17 Building Support TYPICAL HORIZONTAL VENT INSTALLATION Support Brackets Horizontal / Inclined Run Framing Typical Termination SV4.5E90 Shown Elbow SV4.5L6/2/24/36/48 Exterior Vent Sections Wall Firestop / Spacer Ceiling SV4.5VF Vertical Support Bracket Spacing Every 5 ft (.52 m) Rise When Using Secure Flex, Typical Use Firestop / Spacer SF4.5VF Termination...
  • Page 18 J. Assemble vent run to exterior wall - If not Typical Firestop/Spacer (SV4.5HF) shown previously measured, locate the center of the Termination on the exterior side of the wall. It vent at the exterior wall. Prepare an opening as Shown may also be installed on the described in Step B. Assemble the vent system interior side. to point where the terminus of the last section is 0-/2" 7" located relative to the exterior surface to which (267 mm) (78) 2-/8"...
  • Page 19: Horizontal Vent Tables And Figures

    HORIZONTAL VENT FIGURES/TABLES Table C Notes: H Maximum V Minimum • Secure Vent components (rigid vent pipe and terminal) are shown in feet (meter) feet (meter) the Figures; Secure Flex components (flexible vent pipe and terminal) (0.94) Elbow Only (30/35/40 Models) may also be used.
  • Page 20 HORIZONTAL VENT FIGURES / TABLES (CONTINUED) Wall Firestop/Spacer Table E (SV4.5HF) V Minimum Maximum feet (meter) feet (meter) (0.94) Elbow Only (.524) (0.305) (3.048) (0.60) (4.572) (0.94) Note - When using Secure Flex , use Wall Firestop/Spacer (6.096) (.29) Firestop/Spacer SF4.5VF. (SV4.5HF) = 60 feet (8.3 m) Max.
  • Page 21 HORIZONTAL VENT FIGURES / TABLES (CONTINUED) Table F Typical termination shown. V Minimum Maximum When using Secure Flex, use Firestop/Spacer feet (meter) feet (meter) SF4.5VF. When using Secure (.524) Elbow Only Flex, use Firestop/Spacer (.524) (0.305) SF4.5HF. (3.048) (0.60) Ceiling Firestop/Spacer (4.572) (0.94)
  • Page 22: Venting Using Flexible Vent Pipe

    VERTICAL OR HORIZONTAL VENTING USING Flex Vent SECURE FLEX Note: Outer Pipe Is Pulled Away To KITS AND COMPONENTS Show The Detail of The Inner Pipe Securing Screw - 3 Places Equidistant (equally spaced) Secure Flex venting kits and components Just Below Gear Clamp) APPLY ONLY MIL-PAC BLACK may be used in any venting application in...
  • Page 23: Step 4. Field Wiring

    Step 4. FIELD WIRING 4. Connect the black power supply wire to the 3. Wire the control switch within the millivolt lower outlet's red pigtail lead and the white control circuit using the 15 feet of 2 conductor power supply wire to the common terminal of CAUTION: Label all wires prior to disconnec- wire supplied with the unit. tion when servicing controls. Wiring errors can the outlet as shown in Figure 36. cause improper and dangerous operation. Note: The supplied 15 feet of 2 conductor wire 5. Connect the ground supply wire to the has one end of each conductor connected to ATTENTION: Au moment de l'entretien des...
  • Page 24: Step 5. Optional Blower Kit Wiring

    Note: The supplied 15 feet of 2 conductor wire has one end of each conductor connected to the gas valve circuit and the other end of each conductor placed loose inside the bottom compartment. 9. If the optional unit mounted (FRS) control switch is installed, turn the appliance-mounted ON/OFF burner control switch to the OFF position.
  • Page 25: Step 7. Checking Unit Operation

    B. Brush all joints and connections with the gas The flame should project 1" (25 mm) beyond the leak test solution to check for leaks. If bubbles hood at all three ports (Figure 40). Replace are formed, or gas odor is detected, turn the logs if removed for pilot inspection. gas control knob to the “OFF” position. Either tighten or refasten the leaking connection and To light the burner; turn “ON” the remote wall retest as described above. switch and rotate the gas valve control knob counterclockwise to the “ON” position (“ON” C. When the gas lines are tested and leak free, will be at the top side of the valve). be sure to rinse off the leak testing solution. Hood Igniter Rod MILLIVOLT D. Observe the individual tongues of flame on Length Of Pipe With the burner. Make sure all ports are open and Thermocouple Attached Shut-Off Valve producing flame evenly across the burner. If Figure 39 any ports are blocked, or partially blocked, clean out the ports.
  • Page 26: Step 8. Installing Logs

    Step 8. INSTALL VOLCANIC STONE, 4. Place the left cross log (4) as shown. Posi- Glowing Embers tion it over the rear log (1), with the front of GLOWING EMBERS AND LOGS the log resting over log (2). Separate into Quarter Size (separate) Pieces 5. Place the right cross log (5) as shown. NOTE: Turn off all electricity to the appliance before you install volcanic stone, embers Position it over the right log (3), and rest the and logs.
  • Page 27 WARNING: Logs get very hot and will remain hot up to one hour after gas supply is turned off. Handle only when logs are cool. MLDVT-30 & MLDVT-35 LOG PLACEMENT (model-35 shown, model-30 similar) Number Description Rear Log Left Front Log Right Front Log Left Cross Log Right Cross Log Catalog Number for the entire log set: MLDVT-30: H7839...
  • Page 28 WARNING: Logs get very hot and will remain hot up to one hour after gas supply is turned off. Handle only when logs are cool. MLDVT-40 & MLDVT-45 LOG PLACEMENT (model-40 shown, model-45 similar) Number Description Rear Log Left Front Log Right Front Log Left Cross Log Right Cross Log Catalog Number for the entire log set: MLDVT-40: H7667...
  • Page 29 NOTES:...
  • Page 30: Step 9. Installing Glass Door

    Step 0. BURNER ADJUSTMENTS Step 9. INSTALLING THE GLASS DOOR 2. Pull the latches forward and down to release them from the door channel. Flame Appearance and sooting WARNING: Do not operate appli- 3. Pull the bottom of the door out a few inches Proper flame appearance is a flame which is ance with the glass front removed, and grasp it on the right and left. Gently lift to blue at the base and becomes yellowish-orange cracked or broken. Replacement in the body of the flame. release the door from its channel above the door. Pull the door forward.
  • Page 31 Burner Air Shutter Adjustment Procedure WARNING: Ensure front glass panel are in place and sealed during adjustment. CAUTION: Carbon will be produced if the air shutter is closed too much. Any damage due to carboning result- ing from improperly setting the air shutter is not covered under the warranty.
  • Page 32: Step 11. Hood Installation

    Step . HOOD INSTALLATION (Refer to Figure 50) All of these appliances must have hoods installed This Area Must prior to operating. Remain Clear of Combustible 3" Materials (76 mm) Install hood by sliding it into the slots on the lower edge of the cabinet top. Combustible Finished  in. Min. Wall Materials (25 mm) FINISHING REQUIREMENTS - Wall Details Complete finished interior wall. To install the appliance facing flush with the finished wall, position framework to accommodate the thickness of the Combustible material may...
  • Page 33 INSTALLATION ACCESSORIES CONTINUED t s i ™ t s i ™ N . o N . o N . o N . o N . o N . o N . o N . o , t i i t a t i k r i f , r e...
  • Page 34: Gas Conversion Kits

    GAS CONVERSION KITS WARNING: THIS CONVERSION KIT SHALL BE AVERTISSEMENT: CET ÉQUIPEMENT DE CONVERSION INSTALLED BY A QUALIFIED SERVICE AGENCY SERA INSTALLÉ PAR UNE AGENCE QUALIFIÉE DE IN ACCORDANCE WITH THE MANUFACTURER'S SERVICE CONFORMÉMENT AUX INSTRUCTIONS DU INSTRUCTIONS AND ALL APPLICABLE CODES AND FABRICANT ET TOUTES EXIGENCES ET CODES APPLI- REQUIREMENTS OF THE AUTHORIZED HAVING CABLES DE L'AUTORISÉS AVOIR LA JURIDICTION.
  • Page 35 Millivolt Appliances Electronic Appliances Step 7. Dexen Electronic Valves - See Figure Step 4. SIT Systems - Refer to Figure 52 and 54 and the instructions provided with the kit. the instructions provided with the kit. Using Pressure Regulator Remove and discard the two pressure regula- a Torx T20 (with 1/4" shank and center hole), tor mounting screws. Remove the pressure remove and discard the three pressure regulator regulator and diaphragm. Discard all removed mounting screws. Remove the pressure regu- components. Ensure the provided diaphragm lator, spring, poppet, diaphragm and bushing. is installed properly onto the replacement Discard all removed components. Remove pressure regulator and install the new pres- These sure regulator using the new screws supplied Components Ensure the rubber gasket installed on the back of with the kit. Tighten screws.
  • Page 36 Note: If the igniter is damaged, a replace- Teflon tape on all pipe fittings before installing ment kit is available, order Catalog Number (ensure propane resistant compounds are used 87L54. in propane applications, do not use pipe joint compounds on flare fittings). Figure 55 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 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. Lennox Hearth Products Printed in U.S.A. © 2009 by Lennox Hearth Products P/N 50605-02 REV. A 06/2009 0 West Taft Avenue • Orange, CA 92865...

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