Instruction/ maintenance manual of the product MLDVT-45NM Lennox Hearth
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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.
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 .
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.
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) Bur.
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 .
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 TERMIN.
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.
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.
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 .
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.
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 .
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.
13 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Note: Convert inches into metric equivalent measurement, as follows: Millimeters (mm) = Inches x 25.
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.
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.
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 .
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.
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 .
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.
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.
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.
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.
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.
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.
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.
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.
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).
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.
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 .
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 (.
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 I.
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.
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 .
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.
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.
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.
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.
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.
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.
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.
An important point after buying a device Lennox Hearth MLDVT-45NM (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Lennox Hearth MLDVT-45NM yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Lennox Hearth MLDVT-45NM - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Lennox Hearth MLDVT-45NM you will learn all the available features of the product, as well as information on its operation. The information that you get Lennox Hearth MLDVT-45NM will certainly help you make a decision on the purchase.
If you already are a holder of Lennox Hearth MLDVT-45NM, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Lennox Hearth MLDVT-45NM.
However, one of the most important roles played by the user manual is to help in solving problems with Lennox Hearth MLDVT-45NM. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lennox Hearth MLDVT-45NM along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
