Page 2 - TABLE OF CONTENTS; Please read and understand these; WARNING; GENERAL INFORMATION; LENNOX HEARTH PRODUCTS • MERIT
2 TABLE OF CONTENTS Packaging .........................................Page 2Introduction ......................................Page 2General Information ..........................Page 2Requirements for the Commonwealth of Massachusetts .Page 4New York City Approval .....................Page 4Cold C...
Page 3 - Table 1; 0 - latest edition, or the Canadian Electrical
3 Input (BTU/HR) Manually-Modulated Gas Valves (all models) Models Input Rate (BTU / HR) Nat. Gas Prop. Gas MLDVTCD-35 14,500 high 11,500 low 13,500 high 10,500 low Table 1 The appliance, when installed, must be electri- cally grounded and wired in accordance with local codes or, in the absence of l...
Page 4 - Figure 1; SIT Millivolt Gas Valve; Table 4; Tables 2 and 3; less; Table; REQUIREMENTS FOR THE COMMON-
4 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. Inlet Gas Supply Pressure (all models) Fuel # Minimum Maximum Natural Gas 4.5" WC (1.12 kPa) 10.5" WC (2.61 kPa) Propane 11.0" WC (2.74 kPa) 13.0" WC (3.23 kPa) Table 2 Manifold Gas Supply Pressure (all models) Fuel # Low High Na...
Page 5 - Figure 3; Typical Locations; HORIZONTAL VENT; When the unit is installed with one; COLD CLIMATE INSULATION; LOCATION; Do not insulate the space between the ap-
5 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. Figure 3 - Typical Locations N O IT A CI L P P A T N E V P O T APPLICATION TOP VENT TN EV PO T NOI TA CI LP PA RECESSED INSTALLATION TOP VENT APPLICATION NOI TA CI LP PA TN EV PO T NOI TA CI LP PA TN EV PO T HORIZONTAL VENT (Top Vent Application...
Page 6 - Figure 4B; VENT TERMINATION CLEARANCES; These instructions should be used as a; Vertical Vent Termination Clearances; Figure 4A; Figure 5; Figure 5; Horizontal Vent Termination Clearances; Side Elevation View; Termination Heights For Vents; Figure 4A - Multiple Terminations
6 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS 12 X Roof Pitch is X/12 2 FT MIN. 2 FT MIN. Lowest Discharge Opening H* *H = MINIMUM HEIGHT FROM ROOF TO LOWEST...
Page 7 - ExTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS; Figure 6
7 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS ExTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS Figure 6 * n o it a ll a t s n I n a i d a n a C * ...
Page 8 - MINIMUM CLEARANCES TO COMBUSTIBLES; When the; Table 5; on the underside of the mantel.
8 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 5 (127) 8-1/4 (209) 14 (356) 12 (305) 19 (483) *Shelf Height ( see table) Do not insulate the space between the appliance and the area above it. Shelf Above Fireplace With Top Venting 8 (203) 2 (51) 4 (102) 6 (152) 8 (203) 10 (254) 12 (305) 10 (...
Page 9 - DETAILED INSTALLATION STEPS; Glass Panels on; Figures; on; Table 5 on Page 8; DO NOT; TYPICAL INSTALLATION SEQUENCE; Figure 47 on Page; Attach Safety in Operation
9 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. DETAILED INSTALLATION STEPS The appliance is shipped with all gas controls and components installed and pre-wired. 1. Remove the shipping carton. Remove the shipping pad, exposing the front glass door. 2. Open the two latches (located under the ...
Page 10 - FIREPLACE AND FRAMING SPECIFICATIONS; Vertical Venting Through the Ceiling:; Frame ceiling opening; Framing; Front View
10 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS A B C 7 (178) 5-1/8 12-1/8 (308) 10-1/2 ( 267 ) VENT FRAMING - TOP VENT WITH ONE 90 ° ELBOW Framing should be ...
Page 11 - FIREPLACE FRAMING SPECIFICATIONS; Table 6; Corner Framing with Horizontal Termination; mm; Step 2. ROUTING GAS LINE; Proper Sizing of Gas Line
11 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS FIREPLACE FRAMING SPECIFICATIONS Never use galvanized or plastic pipe. Refer to Table 6 for proper sizing of t...
Page 12 - Figure; Approved Vent Components
12 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. Select Venting System - Horizontal or Vertical With the appliance secured in framing, determine vent routing and identify the exterior termina- tion location. The following sections describe vertical (roof) and horizontal (exterior wall) vent a...
Page 13 - Note: Convert inches into metric equivalent; Model; Table 7
13 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. VERTICAL TERMINATION SYSTEMS (ROOF) See Figure 15 on Page 13 and Figures 23- 25 on Pages 16 and 17 and their associated Vertical Vent Tables which illustrate the various vertical venting configurations that are possible for use with these appli...
Page 14 - refer to Figure 17)
14 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. Vertical (Offset) Installation Analyze the vent routing and determine the quantities of vent sections and number of elbows required. Refer to Vertical Vent Figures and Tables on Pages 16 and 17 to select the type of vertical installation desire...
Page 15 - Swivel Joint
15 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS If the vent system extends more than 5 feet (1.5 m) above the roof flashing, stabilizers may be necessary. Add...
Page 16 - rate sections of concentric flexible; VERTICAL VENT FIGURES/TABLES; vent will be required.
16 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS u When using Se- cure Flex, use Firestop / Spac- er SF4.5VF u Ceiling Firestop / Spacer (SV4.5VF) A Vent Restr...
Page 17 - Ceiling; Top Vent - THREE ELBOWS
17 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. Maintain a minimum 1" (25 mm) clearance to combustibles on the vertical sections. Clear- ances for the horizontal runs are; 3" (76 mm) on top, 1" (25 mm) on sides, and 1" (25 mm) at the bottom. B. Frame exterior wall opening - L...
Page 19 - Termination Guard; INSTALLING HORIZONTAL TERMINATION; Venting Connection and Exterior Wall Recessing; See; Table 8
19 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. J. Assemble vent run to exterior wall - If not previously measured, locate the center of the vent at the exterior wall. Prepare an opening as described in Step B . Assemble the vent system to point where the terminus of the last section is loca...
Page 20 - Under no circumstances, may separate sections of; HORIZONTAL VENT FIGURES/TABLES; Typical termination shown.; Termination Kit Only; zontal vent run is needed, then
20 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. Table C H Maximum V Minimum feet (meter) feet (meter) 3 (0.914) Elbow Only Table D H Maximum V Minimum feet (meter) feet (meter) 5 (1.524) 1 (0.305) 10 (3.048) 2 (0.610) 15 (4.572) 3 (0.914) 20 (6.096) 4 (1.219) V + H = 40 feet (12.2 m) Max. H ...
Page 22 - See Table 8 on Page 20 as
22 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. HORIZONTAL VENT FIGURES / TABLES (CONTINUED) Table F H + H 1 Maximum V Minimum feet (meter) feet (meter) 5 (1.524) Elbow Only 5 (1.524) 1 (0.305) 10 (3.048) 2 (0.610) 15 (4.572) 3 (0.914) 20 (6.096) 4 (1.219) H + H 1 = 20 feet (6.096 m) Max. V ...
Page 23 - SECuRE FLEXTM
23 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS D. Install Firestop / Spacers at ceilings and walls - When Secure Flex penetrates a wall or ceiling, a firesto...
Page 24 - CAUTION; Verify proper operation after servicing.
24 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. JUNCTION BOX W GR BK 120 VAC BK R TRANSFORMER 3V INTERMITTENT ELECTRONIC WIRING DIAGRAM BROWN BROWN BLACK BATTERY BACK-UP TO WALL SWITCH, FRS OR THERMOSTAT BLACK (SENSOR) BLACK (IGNITER) SPARK TO PILOT IGNITER IGNITER MODULE 3V RED BK W GR OPTI...
Page 25 - No batteries to be installed in the battery; BLOWER CONTROL CIRCUIT WIRING; WIRING - OPTIONAL FORCED AIR; Blower Access
25 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS Note: No batteries to be installed in the battery holder until a power outage, or if the appli- ance is to be ...
Page 26 - external to the appliance between the appliance; Step 6. CONNECTING GAS LINE; Gas
26 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. Length Of Pipe With Attached Shut-Off Valve Figure 40 LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS Gas Flex Line Gas Shut-Off Valve Valve Piezo Spring Door...
Page 27 - Never use an open flame to check; Step 7. VERIFYING APPLIANCE; Page; Millivolt Appliance Checkout; Never use an open flame to
27 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. Turn on gas supply and test for gas leaks, us- ing a gas leak test solution (also referred to as bubble leak solution). Note: Using a soapy water solution is an effective leak test solution but it is not recom- mended, because the soap residue ...
Page 28 - Step 8. INSTALLING CONTEMPORARY; Turn off all electricity to the appliance; Remove the front glass enclosure panel
28 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. Install Tumbled River Stone (MTRS) - IMPORTANT: Refractory panels should be installed before any of the contemporary media are installed. 1. Place stones on the firebox sub-floor, in any atheistically pleasing manner to suite individual taste. ...
Page 29 - MLDVTCD-35 REFRACTORY PANELS AND CONTEMPORARY MEDIA PLACEMENT
29 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS Figure 43 MLDVTCD-35 REFRACTORY PANELS AND CONTEMPORARY MEDIA PLACEMENT Detail A Rear Zen Garden Panel Burner ...
Page 30 - ) by sliding and pulling the
30 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. Air Shutter Adjustment Guidelines : Amount of Primary Air Flame Color Air Shutter Adjustment If air shutter is closed too far Flame will be orange Air shutter gap should be increased If air shutter is open too far Flame will be blue Air shutter...
Page 31 - Burner Air Shutter Adjustment Procedure; Main Burner Factory Air Shutter; Figure 45 - Burner Air Shutter Adjustment
31 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. 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. CAUTIONS • Soot will be produced if the air shutter is closed t...
Page 32 - FINISHING REQUIREMENTS - Contemporary Facade; (use the framing dimensions as-is as shown in; HOOD INSTALLATION; See Page 5 for Cold Climate Insulation; - Combustible Wall Framing; Figure 48 - Contemporary Facade Dimensions; Floor
32 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. FINISHING REQUIREMENTS - Contemporary Facade This contemporary unit is uniquely suited for mid-wall installations with an available self-finishing decorative contemporary Facade. The decorative contemporary Facade is listed in the accessories s...
Page 33 - COLOCACIóN DE ADVERTENCIAS DE; ) o en el termostato; LENNOx HEARTH PRODUCTS; WARNINGS; ) and if used on the; LENNOx HEARTH PRODUCTS; Figure A
33 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. Step 12. ATTACHING SAFETY-IN-OPERATION WARNINGS It is the installers responsibility to ensure these warnings are properly affixed during installation. These warning labels are a critical step in informing consumers of safe operation of this app...
Page 34 - INSTALLATION ACCESSORIES; ir
34 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS d e t s i L t n e V e r u c e S s t n e n o p m o C ™ . o N .t a C . o N l e d o M n o it p ir c s e D 8 7 L 7...
Page 35 - INSTALLATION ACCESSORIES CONTINUED; lf
35 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS INSTALLATION ACCESSORIES CONTINUED * All compressed flex vents can be expanded up to two times. d e t s i L x ...
Page 36 - Millivolt; this installation assumes responsibility for this conversion.; AVERTISSEMENT; assume les responsabilités liées à la conversion.; Burner Assembly
36 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS Millivolt SIT Systems Propane to Natural Gas Conversion Kits Model Cat. No. MLDVTCD-35 H7293 Electronic DExEN ...
Page 37 - Millivolt Appliances; Pressure; VERIFY THE PROPER ORIFICE SIZE; Table 9; - Dexen Electronic Gas Valve
37 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE. * Standard size installed at factory ** Standard size in LP conversion kit • Part /Cat. Number LENNOX HEARTH PRODUCTS • MERIT ® SERIES DIRECT-VENT CONTEMPORARY DESIGN GAS FIREPLACES • MODEL MLDVTCD-35 • INSTALLATION INSTRUCTIONS Millivolt Appli...