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Manual Lennox Hearth MLDVT-30PM

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  • Lennox Hearth MLDVT-30PM - page 1

    MODELS 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. I N S T A L L A ...

  • Lennox Hearth MLDVT-30PM - page 2

    2 LE N NO X HEA R TH PR OD UCT S • ME RI T ® SE RIE S D IR E CT - VE N T GA S F IR EPL AC ES • M OD ELS ML DV T -3 0/3 5 /4 0/ 4 5 • I NS T A LL A TI O N IN S TR UC T IO NS T ABLE OF CONTENTS Packaging ......................................... Page 2 Introduction ...................................... Page 2 General Information ............. ...

  • Lennox Hearth MLDVT-30PM - page 3

    3 LE N NO X HEA R TH PR OD UCT S • ME RI T ® SE RIE S D IR E CT -VE N T GA S F IR EPL AC ES • M O DE LS ML DV T - 30 /3 5 /4 0/ 4 5 • I NS T A LL A TI O N IN S TR UC TIO NS W ARNING Improper installation, adjust- ment, alteration, service or maintenance can cause injur y or property damage. Refer to this manual. For assistance or additional ...

  • Lennox Hearth MLDVT-30PM - page 4

    4 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Figure 2 - Dexen Electronic Gas Valve Pilot Stage T erminal Pressure-T ap (Inlet) Pilot Gas Outlet Supply Gas Inlet Pressure-T ap (Manifold) Burner Stage T erminal Grou nd (TP) PILOT OUT VENT LO TH TP TH TP HI IN IN Regulator Mounting Screw T est gauge connections are provided on the front of ...

  • Lennox Hearth MLDVT-30PM - page 5

    5 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LE N NO X HEA R TH PR OD UCT S • ME RI T ® SE RIE S D IR E CT -VE N T GA S F IR EPL AC ES • M O DE LS ML DV T - 30 /3 5 /4 0/ 4 5 • I NS T A LL A TI O N IN S TR UC TIO NS Figure 3 - T ypical Locations N O I T A C I L P P A T N E V P O T APPLICA TION TOP VENT T N E V P O T N O I T A C I ...

  • Lennox Hearth MLDVT-30PM - page 6

    6 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 12 X Roof Pitch is X/12 2 FT MIN. 2 FT MIN. Lowest Discharge Opening H* *H = MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING OF VENT TERMINA TION HEIGHTS FOR VENTS ABOVE FLA T OR SLOPED ROOFS Horizontal Overhang Vertical Wall Vent T ermination Storm Collar Concentric Vent Pipe Flashing 1 ...

  • Lennox Hearth MLDVT-30PM - page 7

    7 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. EXTERIOR HORIZONT AL VENT TERMINA TION CLEARANCE REQUIREMENTS Figure 7 V V V V V F C Fixed Closed Window Operable Window B B A B H M I = Area where Termination is not Permitted = Air Supply Inlet X = Vent T ermination V D V 3 ft. 3 ft. A A A = 9” in U.S. = 12” in Canada V L B J X V A G Ins ...

  • Lennox Hearth MLDVT-30PM - page 8

    8 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 5 ( 1 27 ) 8-1/4 ( 2 09 ) 14 ( 3 56 ) 12 ( 3 05 ) 1 9 (4 8 3 ) *Shelf Height ( see table) Do not insulate the space between the appliance and the area above it. Shelf Above Fireplace With T op Venting Figure 9 - Minimum Mantel Clearances 8 (203) 2 ( 5 1 ) 4 ( 1 0 2) 6 ( 1 5 2) 8 ( 2 0 3) 10 ( ...

  • Lennox Hearth MLDVT-30PM - page 9

    9 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. W ARNING Fa il ur e to po si ti on t h e pa rts i n ac co rd an ce w it h th es e di a gr ams or fa il ur e to us e o nl y p ar ts sp ec ifi - ca ll y ap p ro ved wi th th is ap pl ia nc e ma y res ul t in p ro pe rt y da ma ge or pe rs on al i nju ry . A VERTISSEMENT Risque de dommages ou de ...

  • Lennox Hearth MLDVT-30PM - page 10

    10 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. FIREPLACE AND FRAMING SPECIFICA TIONS V en t S iz e Co ax ia l DV V en t Si ze 4- 1/ 2" I nn er 7- 1/ 2" O ut er Vertical V enting Through the Ceiling: Frame ceiling opening - Use a plumb line from the ceiling above the appliance to locate center of the vertical run. Cut and/or fram ...

  • Lennox Hearth MLDVT-30PM - page 11

    11 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. FIREPLACE FRAMING SPECIFICA TIONS Schedule 40 Black Iron Pipe Inside Diameter (Inches) Sc hed ul e 40 Pi p e Le ngt h (f e et ) Na tur al Ga s P ro p a n e G as 0-10 1/2 3/8 10-40 1/2 1/2 40-100 1/2 1/2 100-150 3/4 1/2 150-200 3/4 1/2 T able 6 No te s: • A ll ap pl ia nc es ar e fac to ry- ...

  • Lennox Hearth MLDVT-30PM - page 12

    12 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Installation of Vent Restrictor A vent restrictor may be needed with this appliance. The restrictor is installed in the appliance top flue outlet as shown in Figure 16 , either before adding vent, from above, or after installation of vent from below , within the firebox. The restrictor is s ...

  • Lennox Hearth MLDVT-30PM - page 13

    13 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Note: Convert inches into metric equivalent measurement, as follows: Millimeters (mm) = Inches x 25.4 Centimeters (cm) = Inches x 2.54 Meters (M) = Inches x .0254 T R A H C H T G N E L N O I T C E S T N E V l a n i m o N h t g n e L n o i t c e S ) s e h c n i ( 6 2 1 4 2 6 3 8 4 T O O O O O ...

  • Lennox Hearth MLDVT-30PM - page 14

    14 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Push the vent component against the previous section until it fully engages, then twist the com pon ent c loc kwi se ru nni ng th e di mple s do wn and along the incline channels until they seat at the end of the channels. This seating position is indicated by the alignment of the arrow and d ...

  • Lennox Hearth MLDVT-30PM - page 15

    15 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. If the vent system extends more than 5 feet (1.5m) above the roof ashing, stabilizers may be necessary . Additional screws may be used at section joints for added stability . Guide wires may be attached to the joint for additional sup- port on multiple joint configurations. G. Continue in ...

  • Lennox Hearth MLDVT-30PM - page 16

    16 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. u Ce il in g Fi re st op / Sp ac er ( SV 4. 5V F) u When using Secure Flex, use Firestop/Spacer SF4.5VF A Vent Restrictor , as shown in Figure 16 Page 12 , must be used in this application Figure 25 - T op Vent - STRAIGHT u C ei l i ng F i re s t o p / S p ac e r ( S V 4 .5 V F ) v W a l l F ...

  • Lennox Hearth MLDVT-30PM - page 17

    17 NOTE: DIAGRAMS & ILLUSTRA TIONS 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 - Locate the center of the vent outlet on the ...

  • Lennox Hearth MLDVT-30PM - page 18

    18 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. S up p o r t B ra c k e t s B ui l d i n g S up p o r t F ra m i n g S V4 . 5 E 9 0 E lb o w C ei l i n g F ir e p l a c e S V4 . 5 L 6 / 1 2/ 2 4/ 3 6 / 4 8 V e n t Se c t i o n s V e r t i ca l R is e S up p o r t B ra c ke t S p a c in g E ve r y 5 f t ( 1 .5 2 m ) Se e F ig ur e 1 7 o n P ...

  • Lennox Hearth MLDVT-30PM - page 19

    19 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LE N NO X HEA R TH PR OD UCT S • ME RI T ® SE RIE S D IR E CT -VE N T GA S F IR EPL AC ES • M O DE LS ML DV T - 30 /3 5 /4 0/ 4 5 • I NS T A LL A TI O N IN S TR UC TIO NS J. Assemble vent run to exterior wall - If not previously measured, locate the center of the vent at the exterior w ...

  • Lennox Hearth MLDVT-30PM - page 20

    20 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. See T able 8 as an aid in venting component selection for a particular range of exterior wall thicknesses. See T able 8 as an aid in venting component selection for a particular range of exterior wall thicknesses. H u Wall Firestop/Spacer (SV4.5HF) V u When using Secure Fle x, use Firestop/Sp ...

  • Lennox Hearth MLDVT-30PM - page 21

    21 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. V H H 1  Wall Firestop/Spacer (SV4.5HF)  Wall Firestop/Spacer (SV4.5HF)  Whe n usin g Secur e Flex, use Firestop/Spacer SF4.5HF.  Ceiling Firestop/Spacer (SV4.5VF)  Note - When using Secure Flex TM , use Firestop/Spacer SF4.5VF. T ab l e E H + H 1 M ax im um V M i ni m um fe et ...

  • Lennox Hearth MLDVT-30PM - page 22

    22 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Example: If 20 feet total (H+H 1 ) horizontal vent run is needed, then 4 feet minimum of (V) vertical vent will be required. This table shows a 1(V) to 5(H) ratio. For ever y 1 foot of (V) vertical, you are allowed 5 feet of (H+ H 1 ) horizontal run, up to a maximum horizontal run of 20 feet. ...

  • Lennox Hearth MLDVT-30PM - page 23

    23 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. D. I ns t al l F i r e s t o p / S p a c e r s a t c e il i ng s a n d w a l ls - Whe n Se cure Fl ex p enet rate s a wal l or ce ilin g, a resto p / spac er is re quir ed: use the SF4. 5 VF re stop / spac er for cei ling s and the SF4.5 HF fire stop / spacer for wall s. See the appr o ...

  • Lennox Hearth MLDVT-30PM - page 24

    24 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LE N NO X HEA R TH PR OD UCT S • ME RI T ® SE RIE S D IR E CT -VE N T GA S F IR EPL AC ES • M O DE LS ML DV T - 30 /3 5 /4 0/ 4 5 • I NS T A LL A TI O N IN S TR UC TIO NS Step 4. FIELD WIRING B. Electronic Wiring (see Figure 38 ) Note: The electronic appliance must be con- nected to th ...

  • Lennox Hearth MLDVT-30PM - page 25

    25 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LE N NO X HEA R TH PR OD UCT S • ME RI T ® SE RIE S D IR E CT -VE N T GA S F IR EPL AC ES • M O DE LS ML DV T - 30 /3 5 /4 0/ 4 5 • I NS T A LL A TI O N IN S TR UC TIO NS Note: Remote receiver should be located in the wall, or if installed in the control compartment, pulled all the way ...

  • Lennox Hearth MLDVT-30PM - page 26

    26 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Gas Flex Line Gas Shut-Off Valve Valve Piezo Spring Door Latch Lower Control Compartment LE N NO X HEA R TH PR OD UCT S • ME RI T ® SE RIE S D IR E CT -VE N T GA S F IR EPL AC ES • M O DE LS ML DV T - 30 /3 5 /4 0/ 4 5 • I NS T A LL A TI O N IN S TR UC TIO NS Figure 41 Step 6. CONNECTI ...

  • Lennox Hearth MLDVT-30PM - page 27

    27 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. T urn on gas supply and test for gas leaks, us- ing a gas leak test solution (also referred to as bubble leak solution). No te : Usi ng a so ap y wa te r sol ut io n is an eff ec - ti ve lea k te st sol ut io n bu t it is n ot rec om me n de d, be ca us e th e soa p res i du e tha t is lef t ...

  • Lennox Hearth MLDVT-30PM - page 28

    28 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. REFERENCE Firebox Accessories / Parts Cat. No. M o d e l No . Description 88L53 FGE Bag of Glowing Embers 80L42 FDVS Bag of Decorative Volcanic Stone Glowing Embers Bag of Glowing Embers (rockwool) Separate into Quarter Size (separate) Pieces Step 8. INST ALL VOLCANIC STONE, GLOWING EMBERS, A ...

  • Lennox Hearth MLDVT-30PM - page 29

    29 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. MLDVT -30 & MLDVT -35 LOG PLACEMENT (model-35 shown; model-30 similar) Figure 47 Step 2 Step 3 Step 4 Step 1 Log Number Description 1 Rear Log 2 Left Front Log 3 Right Front Log 4 Left Cross Log 5 Right Cross Log Catalog Number for the entire log set: MLDVT -30: H7839 MLDVT -35: H7666 Lef ...

  • Lennox Hearth MLDVT-30PM - page 30

    30 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. MLDVT -40 & MLDVT -45 LOG PLACEMENT (model-40 shown; model-45 similar) Step 2 Step 3 Step 1 Step 4 Figure 48 4 5 3 2 1 3 5 Glowing Embers (Do not place glowing embers over burner slots) Log Rack Volcanic Stone Right Rear Log Bracket 1 Position on the left rear log bracket 4 2 3 Position t ...

  • Lennox Hearth MLDVT-30PM - page 31

    31 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Step 9. INST ALLA TION AND REMOVAL OF GLASS DOOR Air Shutter Adjustment Guidelines : Amount of Primary Air Flame Color Air Shutter Adjustment If a ir s hu tt er i s cl os ed t oo f ar F la me w il l be o ra ng e Ai r sh ut te r ga p sh ou ld b e in cr ea se d If a ir s hu tt er i s op en t oo ...

  • Lennox Hearth MLDVT-30PM - page 32

    32 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. W ARNINGS • Air shutter adjustment should only be performed by a quali- fied profes sion al servic e tech- nician. • Ensure front glass panel are in place and sealed during adjustment. CAUTIONS • Soot will be produced if the air shutter is closed too much. Any dama ...

  • Lennox Hearth MLDVT-30PM - page 33

    33 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Step 11. HOOD INST ALLA TION (Refer to Figure 53) All models must have a hood installed prior to operating. In sta ll h o od by sl idi ng it in to th e s l ot s o n t he lo we r e d ge of th e c abi ne t t op . FINISHING REQUIREMENTS - Wall Details Complete finished interior wall. T o instal ...

  • Lennox Hearth MLDVT-30PM - page 34

    34 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Step 12. A TT ACHING SAFETY -IN-OPERA TION WARNINGS It is the installer’ s 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 appliance. A PP OS I TI ON D ES M I SE S E ...

  • Lennox Hearth MLDVT-30PM - page 35

    35 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. C at . N o . M o d e l D es c r i p t i on 77 L 70 S V4 .5L 6 6 I n ch ( 1 52 m m ) 77 L 71 S V4 .5L 12 1 2 In c h (3 05 mm ) 77 L 72 S V4 .5L 24 2 4 In c h (6 10 mm ) 77 L 73 SV 4. 5L3 6 36 I nc h ( 91 4 m m) 77 L 74 SV 4. 5L4 8 48 I nc h ( 12 19 mm ) 77 L 75 S V4 .5L A T ele sco pi c L e ng ...

  • Lennox Hearth MLDVT-30PM - page 36

    36 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Fl e x LE N NO X HEA R TH PR OD UCT S • ME RI T ® SE RIE S D IR E CT -VE N T GA S F IR EPL AC ES • M O DE LS ML DV T - 30 /3 5 /4 0/ 4 5 • I NS T A LL A TI O N IN S TR UC TIO NS C at . # M o de l D e s c r i p t io n H1969 SF4.5HT -2 Hor i zo nt a l Sq u ar e T er mi na - ti o n fo r ? ...

  • Lennox Hearth MLDVT-30PM - page 37

    37 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Millivolt SIT Systems Propane Gas to Natural Gas Conversion Kits Models Catalog No. MLDVT -30 H6165 MLDVT -35 H7293 MLDVT -40 H7294 MLDVT -45 85L66 Millivolt SIT Systems Natural Gas T o Propane Gas Conversion Kits Models Catalog No. MLDVT -30 H7672 MLDVT -35 H7292 MLDVT -40 H7673 MLDVT -45 H7 ...

  • Lennox Hearth MLDVT-30PM - page 38

    38 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Figure 55 Millivolt Appliances Step 5. SIT Systems - Refer to Figure 55 and the instructions provided with the kit. Using a T or x T20 (with 1/4" shank and center hole), tool or standard flat screwdriver remove and discard the three pressure regulator mounting screws. Remove the pressu ...

  • Lennox Hearth MLDVT-30PM - page 39

    39 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LE N NO X HEA R TH PR OD UCT S • ME RI T ® SE RIE S D IR E CT -VE N T GA S F IR EPL AC ES • M O DE LS ML DV T - 30 /3 5 /4 0/ 4 5 • I NS T A LL A TI O N IN S TR UC TIO NS Step 10. Reassemble the remaining compo- nents by reversing the procedures outlined in the preceding steps. Step 11 ...

  • Lennox Hearth MLDVT-30PM - page 40

    Printed in U.S.A. © 2009 Lennox Hearth Products P/N 506015-02 Rev . E 06/2011 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. 1508ElmHillP ...

Manufacturer Lennox Hearth Category Indoor Fireplace

Documents that we receive from a manufacturer of a Lennox Hearth MLDVT-30PM can be divided into several groups. They are, among others:
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All of them are important, but the most important information from the point of view of use of the device are in the user manual Lennox Hearth MLDVT-30PM.

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