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Lennox Hearth MP-36OD - page 1
36" Indoor / Outdoor Wood Burning Fireplaces P/N 850,030M REV . B 04/2006 MP-36OD MODEL MERIT PLUS ® SERIES This installation manual will enable you to obtain a safe, effi cient and de- pendable installation of your fi replace system. Please read and understand these instructions before beginning your installation. Do not alter or modify th ...
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Lennox Hearth MP-36OD - page 2
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 2 T ABLE OF CONTENTS Safety Rules ...................................... Page 2 T ools and Building Supplies .............. Page 2 Precautions ....................................... Page 2 Introduction ...................................... Page 3 Clearances/Height Requirements ...... Page 4 Ch ...
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Lennox Hearth MP-36OD - page 3
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 3 These fi replace systems are designed for in- stallation in accordance with the National Fire Protection Standard for chimneys, fi replaces and solid fuel burning appliances; NFP A 211- latest edition and in accordance with codes such as the BOCA Basic/National Codes, the Standard Mechanical ...
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Lennox Hearth MP-36OD - page 4
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 4 INDOOR INST ALLA TIONS - The minimum installed height of the completed fi replace system for is 15' 0." The maximum height is 60' 0" (see T able 1 ). OUTDOOR INST ALLA TIONS - The minimum installed height of the completed fi replace system is 7' 3." The maximum ...
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Lennox Hearth MP-36OD - page 5
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 5 Figure 4 Insulate Joists Same As Ceiling Draft Stops Firestop CTDT T ermination Note: Non- Combustible Chase Flashing Must Be Used T o Cover Chase Opening Optional Insulation In Outside Walls Of Chase Solid Continuous Surface Outside Base Insulation (Thermal Barrier) 8' Level Chase Enclos ...
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Lennox Hearth MP-36OD - page 6
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 6 ASSEMBL Y STEPS Note: The following steps represent the normal sequence of installation. Each installation is unique, however , and might require a different sequence. 1. Position fi rebox prior to framing or into prepared framing. 2. (Outdoor Installations) W aterproof the fi replace. See W ...
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Lennox Hearth MP-36OD - page 7
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 7 IMPORT ANT! IF THE AIR GA TE IS INST ALLED UPSIDE DOWN (WITH THE NOTCH POSI- TIONED ON THE UPPER HALF) IT WILL NOT WORK PROPERL Y . REFER TO FIGURE 9. c. Ensure the air gate arm remains attached to the air gate, secure the Air Gate to the fi replace, with the screws provided, as shown in Figu ...
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Lennox Hearth MP-36OD - page 8
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 8 Figure 16 Air Duct Air Inlet Clamps Note: Air Inlet Must Be Free Of Any Obstructions Install as follows: Connect the 4" (102 mm) Class 0 air duct provided, to the collar on the fi replace with the clamps provided in the kit’ s hardware package ( Figure 16) . Route the Class 0 metallic ...
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Lennox Hearth MP-36OD - page 9
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 9 FIREPLACE SPECIFICA TIONS - MODEL MP-36OD Figure 18 Notes Due to Lennox' ongoing commitment to quality , all specifi cations, ratings and dimensions are subject to change without notice. All framing dimensions calculated for 1/2" dry wall at the fi replace face. If sheathing the ch ...
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Lennox Hearth MP-36OD - page 10
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 10 INST ALLING THE FIREPLACE Step 1. Slide the fi replace into prepared fram- ing or position fi replace in its fi nal position and frame later . The fi replace may not be recessed into a combustible fl oor . Maintain the fl oor to hearth clearance established by the fi replace lower fron ...
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Lennox Hearth MP-36OD - page 11
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 11 Note: Install the hearth extension only as il- lustrated (see Figures 21 & 22 ). The safety strips should extend from front of the fi replace at least 1 1/2" and should extend to be at least fl ush with the sides. In the event a wooden support is used to elevate the fi replace abo ...
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Lennox Hearth MP-36OD - page 12
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 12 3. Cut or frame a hole through the outside wall for the installation of the duct inlet hood. A 6-1/2" (165 mm) diameter hole is required. Feed the loose end of the fl exible duct through the hole cut for the inlet hood and attach to the collar on inlet hood using two (2) screws. Insert ...
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Lennox Hearth MP-36OD - page 13
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 13 CHIMNEY 30° OFFSET THROUGH FLOOR OR CEILING It may be necessary to assemble the chimney at 30° when passing through the fl oor or ceiling area. Use the F8FS30 fi restop spacer as shown in Figures 31 & 32 . Support the chimney at fl oor or ceiling penetration with a FTF8 stabilizer if ...
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Lennox Hearth MP-36OD - page 14
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 14 Next, slide roof fl ashing over extended chimney section that previously has been installed above the roof opening in Step 4 . FTF8 fl ashings require fl ashing spacers. Slide fl ashing all the way down until the fl ashing base rests fl at on the roof ( Figure 38 ) . Again, check the ve ...
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Lennox Hearth MP-36OD - page 15
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 15 This suggestion is provided in the interest of better operation. If the terminations are located too close to each other , smoke may migrate from one fl ue into the other . FTF8 CHIMNEY COMPONENT CALCULA TIONS The minimum installed height of the completed fi replace system is 15' 0&quo ...
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Lennox Hearth MP-36OD - page 16
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 16 The offset and return elbows may be attached together , or a section or sections of chimney may be used between, but do not exceed 20' in total length between elbows. If sections of pipe exceed 10' between elbows, a chimney stabilizer must be used at the midpoint ( Figure 45 ) . The ...
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Lennox Hearth MP-36OD - page 17
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 17 Figure 45 Stabilizer A 1 20' Max. B 1 10' Max. Offset Elbow Return Elbow A 1 C 1 B 1 B 2 C 2 A 2 A 1 C 1 B 1 B 2 C 2 A 2 Chimney Section Joints No. 8 x 1/2" SMS t A d e r i u q e R s w e r c S ' 6 t s a P t n i o J y r e v E n I d e r i u q e R s w e r c S o N t e s f f O ...
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Lennox Hearth MP-36OD - page 18
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 18 Offset Elevation Chart A B FTF8-ES30 Number of FTF8 Chimney Sections Offset Height Offset/Return FTF8-S4 (Inches) (Inches) Elbow Stabilizer 12" 18" 36" 48" 41 5 ³⁄₄ 10 0 0 0 0 92 4 ¹⁄₂ 10 1 0 0 0 12 29 ³⁄₄ 10 0 1 0 0 14 ¹⁄₄ 33 ¹⁄₂ 10 2 0 0 0 17 ¹? ...
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Lennox Hearth MP-36OD - page 19
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 19 Glass Doors If glass doors are to be installed on these fi replaces, refer to specifi c installation instruc- tions packed with the glass doors. Use only the doors that are listed for use with these fi replaces. Use of other non-listed glass door on these fi replaces may constitute a pote ...
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Lennox Hearth MP-36OD - page 20
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 20 COLD CLIMA TE INSULA TION If you live in a cold climate, it is especially important to seal all cracks around the fi replace opening with noncombustible material and wherever cold air could enter the room. Sur - rounding materials must be caulked where it meets the black metal facing of the ...
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Lennox Hearth MP-36OD - page 21
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 21 Figure 53 A B D C C Hearth Extension Dimensions A 16" B 30" C8 " D 46" Wall Shield Required Where Less Than 12" A B C C 30" 24" D Methods of Determining Hearth Extension and Wall Shield Equivalents - T o determine the thickness required for the alternate mat ...
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Lennox Hearth MP-36OD - page 22
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 22 Calculating Minimum Thickness if Multiple Materials are Used At times it is important to know what combination of materials are acceptable for use as fl oor protection. The “R values” are used to determine acceptable combinations of materials because “R values” are additive where r a ...
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Lennox Hearth MP-36OD - page 23
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 23 Storm Collar 63L59 FSC Storm Collar (12 pack) 94L77 FSC-B-12 Air Gate Kit H1972 OAKG-OD Combination Offset/Return Elbow 63L28 FTF8-OR15 Firestop Spacer (Flat) (Single Pack) 63L29 F8FS Firestop Spacer (Flat) (Single Pack) 63L31 F8FS-2 Firestop Spacer (Flat) (12 Pack) 94L76 F8FS-12 Chimney Sect ...
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Lennox Hearth MP-36OD - page 24
NOTE: DIAGRAMS & ILLUSTRA TIONS ARE NOT TO SCALE. 24 Printed in U.S.A. © 2005 by LENNOX HEARTH PRODUCTS P/N 850,030M REV . B 04/2006 The manufacturer reserves the right to make changes at any time, without notice, in design, materials, specifi cations, prices and also to discontinue colors, styles and products. Consult your local distributor ...
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