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INSTALLATION INSTRUCTIONS
MPD Direct-Vent
Gas Fireplaces
MODELS
MILLIVOLT: ELECTRONIC:
P/N 850014 Rev. V 08/2011
MPDT-3328CNM-B MPD-4035CNM-B MPDT-3328CNE-B MPD-4035CNE-B
This manual is one of a set of two supporting this product.
Refer to P/N 875014M for Care and Operation Instructions. MPDT-3328CPM-B MPD-4035CPM-B MPDT-3328CPE-B MPD-4035CPE-B
MPDR-3328CNM-B MPD-4540CNM-B MPDR-3328CNE-B MPD-4540CNE-B
Ce manuel est disponible en francais, simplement
MPDR-3328CPM-B MPD-4540CPM-B MPDR-3
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® 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 packaged with: WARNING Introduction ................................................. 2 • (1 set) Logs (packaged in a carton inside the General Information ..................................... 2 Young children shou
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® 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- by a qualified service person. The appliance cally grounded and wired in accordance with WARNING should be inspected before use and at least local codes or, in the absence of local codes, annually by a professional service person. Improper installation, adjust- with the National E
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O W IN PSI T H N ® 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 Gas Control manifold gas pressure requirements: Valve deration - At higher elevations, the amount of BTU fuel value delivered must be reduced Inlet Inlet Gas Supply Pressure Pressure by eit
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REAR VENT APPLICATION ® 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 outside chase cavity between studs and under floor on which appliance rests, if floor is above ground level. Gas line holes and other open- ings shoul
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® LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS VenT Termina Tion Clearan Ces 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 TERMINATION HEIGHTS FOR VENTS ABOVE guideline and do not supersede local codes shown in the following chart: FLAT OR SLOPED ROOFS in any way. install venting according to local Horiz
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V ® 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. P N N NOTE: Location Of The Vent Termination Exterior Wall Inside Must Not Interfere With Access To The Corner Detail O Electrical Service. *18” V V G Q Horizontal Termination V 6” Ventilated Soffit A Inside Corner = 9” in
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® 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. (13) on all sides (as detailed in Table 5), with the following exception: When 0 (0) from Spacers Or dimples ** the unit is installed with on
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® 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). Never allow combustible materials to be positioned in front of or overlapping the appliance face (see Figures 65 and 66 on Page 34 ). Non-combustible materials, such as surrounds and ot
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® 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; however, each installation is unique and and components installed and pre-wired. Frame the appliance as illustrated in Figures may result in variations to the steps described. 13 and
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® 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 Model No. A B C D E 90° ELBOW or larger lumber. (267) in. 33 1/4 33 1/4 ----- 37 3/4 12 7/8 MPDT-3328 VENT FRAMING: mm 845 845 ----- 959 327 REAR VENT WITH NO ELBOWS in. 33 1/4 33 1/4 19 5/8 ----- 12 7/8 MPDR-3328 7 mm 845 845 498 ----- 327 (178) 5-1/8 (130) 12-1
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® LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS FIREPLACE FRAMING SPECIFICATIONS Model No. A B C D E F b in. 33 1/8 48 1/2 34 5/16 17 3/16 241/4 5 MPDT-3328 MPD and MPDR units MPDR-3328 mm 841 1232 872 437 616 127 F in. 35 1/8 57 1/2 40 5/8 19 3/16 28 3/4 6 1/8 7" MPD-3530 MPD and MPDT units (178 mm) mm 892 1461 1032 487 730 156 in. 40 1/8 61 3/16 43 11/32 19 3/16 30 11/16 7 7/8 MPD-4035 mm 1019 1554 1101 487 779 200 C in. 45 1/8
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® 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 (MPd-3530/4035/4540 models With the appliance secured in framing, determine with combined top/rear vent) vent routing and identify the exterior termina- These fireplaces must be vented directly tion location. The followi
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® LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS VERTICAL TERMINATION SYSTEMS (ROOF) VENT SECTION LENGTH CHART VENT SECTION LENGTH CHART Nominal T T Nominal Section 6 12 24 36 48 See Figure 20 and Figures 30 through 32 Section Length 6 12 24 36 48 O O Length (inches) (inches) T T on Page 17 and their associated Vertical Net Section A A 4-1/2 10-1/2 22-1/2 34-1/2 46-1/2 Net Section Length (inches) 4-1/2 10-1/2 22-1/2 34-1/2 46-1/2
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® 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 are fitted with collars having locking inclined Analyze the vent routing and determine the channels. The dimpled end of the vent com- component clockwise running the dimples down quantities of vent sections and
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® 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 C sections. The elbows feature a twist section to allow them to be routed about the center axis of their initial collar section to align with the D required direction of the nex
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® LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS VERTICAL VENT FIGURES/TABLES Ceiling TABLE A Note: Secure Vent (rigid vent pipe) is shown Firestop/Spacer H Maximum V Minimum SV4.5VF* in the figures; Secure Flex (flexible vent pipe) (meters) may also be used. feet (meters) feet *When using Secure Flex, use 2 (0.610) 1 (0.305) Note: It is very important that the horizontal/ Ceiling Firestop/Spacer SF4.5VF. 4 (1.219) 2 (0.61
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® LENNOX HEARTH PRODUCTS • MERIT PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INSTALLATION INSTRUCTIONS VERTICAL VENT FIGURES/TABLES (continued) TABLE C H1 H+H Maximum H Maximum V Minimum 1 (meters) (meters) (meters) feet feet feet (1.524) (0.610) (0.305) 5 2 1 Ceiling Firestop/Spacer (3.048) (1.219) (0.610) 10 4 2 SV4.5VF* *When using Secure Flex, use (4.572) (1.829) (0.914) 15 6 3 Ceiling Firestop/Spacer SF4.5VF. (6.096) (2.438) (1.219) 20 8 4 **When using Secure Flex, use Wal
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® 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 Support 21 to 23 and their associated Horizontal Vent Termination Framing Table illustrate the various horizontal venting SV4.5E90 configurations that are possible for use with Elbow these applia
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® 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. Prepare an opening as may also be installed on the interior side. SV4.5HT-2 described in Step B. Assemble the vent system Termination to point where the terminus of the last section 7" (178
