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Lennox Hearth MPD-4540CPM-B manual

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Table of contents for the manual

  • Page 1

    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. This appliance is not convertible for use with other gases, unless a [...]

  • Page 2

    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). • (1 bag) Glowing Embers (in bottom compart- ment). • Literature Kit (envelope in bottom com- [...]

  • Page 3

    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. For assistance or additional information consult a qualified installer , ser vice agency o[...]

  • Page 4

    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). The control val[...]

  • Page 5

    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 Application with a chase) HORIZONT AL VENT (T op Vent Application) VERTICAL VENT (T op Vent Application) (Rear Vent Application) VERTICAL VENT (Rear [...]

  • Page 6

    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. 2 FT MIN. Lowest Discharge Opening H* *H = MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING OF VENT TERMINA TION HEIGHTS FOR VENTS ABOVE FL[...]

  • Page 7

    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. 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 [...]

  • Page 8

    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 Height - Inches (millimeters) T op Vent - With One 90 Degree Elbow Rear Vent - Straight Out The Back Se c ur e Ve nt Se c ur e Fle x Se c ur e Ve nt Se [...]

  • Page 9

    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 Clearances Figure 10: Min imum Dis tan ce t o Si de Wa ll Combust ible materials may project beyond one side of the fireplace opening as long as they a[...]

  • Page 10

    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 .) Unit Secured to Framing by Nailing Flange Header Spacing Top Standof[...]

  • Page 11

    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). See Notes [1] and [2]. Rear/Side Framing Spacers Note[...]

  • Page 12

    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 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[...]

  • Page 13

    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 ). These fireplaces must be vented directly to the outside. The vent system may [...]

  • Page 14

    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 25.4 Centimeters (cm) = Inches x 2.54 Meters (M) = Inches x .0254 T R A H C H T[...]

  • Page 15

    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 . [...]

  • Page 16

    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. 12 in. (267 mm) (305 mm) 12/12 10-1/2 in. 17-3/4 in. (267 mm) (451 mm) Figure[...]

  • Page 17

    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 90-DEGREE ELBOW Figure 30: T op Vent - STRAIGHT Figure 32: T op Vent - TWO 90-DEGREE ELBOWS VERTICAL VENT FIGURES/T ABLES Note: It is ver y important[...]

  • Page 18

    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 .52 4) 2 ( 0. 6 10 ) 1 ( 0. 3 05 ) 10 ( 3.0 48 ) 4 (1 . 21 9 ) 2 (0 . 61 0) 15 ( 4.5 72 ) 6 (1 . 82 [...]

  • Page 19

    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. Sealant and securing screws a[...]

  • Page 20

    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. T o prevent contact with hot surfaces, we recommend th[...]

  • Page 21

    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 .61 0) 15 ( 4.5 72 ) 3 (0 .91 4) 20 ( 6.0 96 ) 4 (1 .21 9) V + H = 4 0 fe et (12 . 2 m ) Ma x. [...]

  • Page 22

    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 .5 24 ) 2 ( 0. 610 ) 1 (0 .3 05 ) 10 ( 3. 04 8 ) 4 (1 .21 9) 2 (0 . 61 0 ) 15 ( 4. 57 2 ) 6 (1 .82[...]

  • Page 23

    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 - THREE 90-DEGREE ELBOWS Figure 43: Rear Vent - THREE 90-DEGREE ELBOWS See T able 8 on page 21 as an aid in venting component selection for a particular ra[...]

  • Page 24

    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. Attach Flex Vent to T ermination - Secure Flex components can be pur chased separately and attached to bulk lengths of [...]

  • Page 25

    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. FIELD WIRING TP-TH TP TH APPLIANCE- MOUNTED ON/OFF SWITCH (OPTIONAL) BK/W(1) BK/W(1) WALL-MOUNTED ON/OFF SWITCH (OPTIONAL) THERMOST A T (OPTIONAL) JUNCTION BOX BLACK W [...]

  • Page 26

    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 should be located in the wall, or if installed in the control compartment, pulled all the way for ward and completely to the left or right against the cor[...]

  • Page 27

    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 . If b ub ble s ar e fo rme d, or gas od or is det ect ed, tur n [...]

  • Page 28

    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. DO NOT attempt to [...]

  • Page 29

    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 (Stamped #) 1 Log, Rear (39-12) 2 Log, Left (39-1) 3 Log, Right (39-2) 4 Log, T op Center (39-13) 5 Log, T op/Left (39-3 ) 6 Log, T op/Right (39-4) Pos[...]

  • Page 30

    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 PLACEMENT Catalog Number for the entire log set: 24M22 Log Number Description (Stamped #) 1 Log, Rear (39-5) 2 Log, Left (39-1) 3 Log, Right (39-2) 4 Log[...]

  • Page 31

    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-4540 LOG PLACEMENT Catalog Number for the entire log set: 24M25 1 Log Number Description (Stamped #) 1 Log, Center (39-8) 2 Log, Rear (138) 3 Log, Ri[...]

  • Page 32

    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. REMOVING AND INST ALLING THE 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[...]

  • Page 33

    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. • Ensure front glass panel are in place and sealed durin[...]

  • Page 34

    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. Combustible material may touch top of appliance. Combus[...]

  • Page 35

    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. A TT ACHING SAFETY -IN-OPERA TION WARNINGS It is required that the safety instruction labels furnished with the fireplace be affixed to the op- eration and control point of t[...]

  • Page 36

    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 SV4.5L12 12 Inch (305 mm) 77L72 SV4.5L24 24 Inch (610 mm) 77L73 SV4.5L36 36 Inch[...]

  • Page 37

    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. for fle[...]

  • Page 38

    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. MPDT/R-3328 H2010 MPD-3530 H2012 MPD-4035 H2014 MPD-4540 H2016 Millivolt SIT Systems Natural[...]

  • Page 39

    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. SIT Systems - Refer to Figure 68 and the instructions provided with the kit. Using a T orx T20[...]

  • Page 40

    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 Assembly Pilot Assembly Pilot Orifice Flare Nut See Figure 71 and replace the pilot orifice as follows: Remove the ignitor assembly retainer clip, and c[...]

  • Page 41

    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[...]

  • Page 42

    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 reserves the right to make changes at any time, without notice, in design, materials, specifications, and prices, and also to discontinue colors, styles[...]