Instruction/ maintenance manual of the product MPD-4540CNM-B Lennox Hearth
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MODELS OTL Report No. 116-F-13-4 US Portland 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.
2 LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS P ACKAGING The assembled vented gas fireplace heater is packaged with: • (1 set) Logs (packaged in a carton inside the firebox).
3 LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS W ARNING Improper installation, adjust- ment, alteration, service or maintenance can cause injur y or property damage. Refer to this manual.
4 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS T est gauge connections are provided on the front of the millivolt and electronic gas control valve (identified IN for the inlet and OUT for the manifold side).
5 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS HORIZONT AL VENT (Rear Vent.
6 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS 12 X Roof Pitch is X/12 2 FT MIN.
7 LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE.
8 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Models Combustible Shelf He.
9 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Figure 9: Minimum Mantel Cl.
Pressure Relief Plates 10 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Side Framing Unit Nailing Flange (No clearance to combustible framing is required .
11 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS G H Top View (Louvered Front Model Shown) Concentric Flue: Flue 4-1/2" (114 mm); Combustion Air 7-1/2" (190 mm).
12 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS FIREPLACE FRAMING SPECIFIC.
13 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Us e onl y ap pr ove d ve nt co mp on en ts (s ee Ap pr ove d V en t Co mpo ne nt s on Pa ge 2 ).
14 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Note: Convert inches into metric equivalent measurement, as follows: Millimeters (mm) = Inches x 25.
15 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Min. 10-1/2" (267 mm) Min. 10-1/2" (267 mm) First Vent Component Align the dimple (four places) with the opening of the locking incline channel on appliance collar .
16 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Framing Dimensions for Roof Pitch C D 0/12 10-1/2 in. 10-1/2 in. (267 mm) (267 mm) 6/12 10-1/2 in.
17 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Figure 31: Rear Vent - ONE.
18 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS T A BL E C H + H 1 Ma xim um H Ma xim um V Mi nim um fe et fe et fe et 5 (1 .
19 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Figure 35 The unitized design of the Secure Vent compo- nents will engage and seal both the inner and outer pipe elements with the same procedure.
20 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS IMPORT ANT : The vent termination is hot while in operation and for a period of time following the use of the fireplace.
21 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS H Max im um V Min imu m fe et fe et 5 (1 .52 4) 1 ( 0. 3 05 ) 10 ( 3.0 48 ) 2 (0 .
22 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS T ABL E H H + H 1 Ma xim um H Ma xi mu m V M ini mum fe et f ee t f ee t 5 (1 .
23 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Figure 44: T op Vent - THR.
24 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS 5" (127 mm) Radius Minimum Flexible Vent Section E.
25 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Step 5.
26 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Note: Remote receiver shou.
27 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS B. Br ush al l jo in t s a nd co n ne cti ons wi t h t he ga s le ak tes t so lu t io n to che ck f or le a ks .
28 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Step 9. INST ALL VOLCANIC STONE, GLOWING EMBERS AND LOGS NOTE: T urn off all electricity to the appliance before you install volcanic stone, embers and logs.
29 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS 1 Log Number Description (.
30 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Figure 58 MPD-3530 LOG PLA.
31 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Figure 59 MPD-4035 AND MPD.
32 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Step 10.
33 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS W ARNINGS • Air shutter adjustment should only be performed by a quali- fied profes sion al servic e tech- nician.
LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS 34 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Figure 64 Combustible Finished Wall Materials Min. 1" (25 mm) This area must remain clear of combustible materials.
LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS 35 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE.
36 LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Listed Secure Vent™ Components Cat. No. Model Description 77L70 SV4.5L6 6 Inch (152 mm) 77L71 SV4.
37 LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. Listed Secure Flex™ Components Cat. # Model Description H1969 SF4.5HT -2 Horizontal Square T ermina- tion for flex (without flex vent) 77L87 SFKIT12S Square T erm.
38 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Millivolt SIT Systems Propane Gas to Natural Gas Conversion Kits Models Catalog No.
39 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Burner Assembly Gas Valve Assembly Orifice Figure 67 Millivolt Appliances Step 4.
40 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Retaining Clip Ignitor Ass.
41 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS NOTES.
42 NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. LENNOX HEARTH PRODUCTS • MERIT ® PLUS DIRECT VENT GAS FIREPLACES (MPD33/35/40/45) • INST ALLA TION INSTRUCTIONS Lennox Hearth Products res.
An important point after buying a device Lennox Hearth MPD-4540CNM-B (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 MPD-4540CNM-B 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 MPD-4540CNM-B - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Lennox Hearth MPD-4540CNM-B you will learn all the available features of the product, as well as information on its operation. The information that you get Lennox Hearth MPD-4540CNM-B will certainly help you make a decision on the purchase.
If you already are a holder of Lennox Hearth MPD-4540CNM-B, 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 MPD-4540CNM-B.
However, one of the most important roles played by the user manual is to help in solving problems with Lennox Hearth MPD-4540CNM-B. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lennox Hearth MPD-4540CNM-B 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
