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Lennox Hearth LSO-43 - page 1
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 1 43" Wood Burning Outdoor Fireplace P/N 850,015M REV. C 03/2007 LSO-43 LSO-43-H MODELS RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE OASIS SERIES This installation manual will enable you to obtain a safe, efficient and dependable installation of your fireplace system. Please read and under- st ...
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Lennox Hearth LSO-43 - page 2
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 2 TABLE OF CONTENTS Safety Rules .................................... page 2 Tools and Building Supplies ............ page 2 Precautions ..................................... page 2 Introduction ..................................... page 3 Clearances/Height Requirements ..... page 3 Chimney System .. ...
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Lennox Hearth LSO-43 - page 3
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 3 Figure 1 TYPICAL FREE STANDING INSTALLATION (MUST BE A MINIMUM OF 10' AWAY FROM ANY BUILDING OR COMBUSTIBLE STRUCTURE) When complete, these fireplace systems con- sists of four basic “sub-systems”: 1. The Fireplace 2. The Chimney and Termination 3. Optional Glass Doors 4. Air Inlet CLEARAN ...
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Lennox Hearth LSO-43 - page 4
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 4 Figure 3 Figure 2 When choosing a location, care must be taken to avoid places where flooding or running water may be a problem. Carefully consider the position of the fireplace opening with respect to the location of adjacent or nearby stairwells, doors, windows, walk- ways and over hanging trees, ...
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Lennox Hearth LSO-43 - page 5
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 5 Figure 6 Figure 5 INSTALLING THE FIREPLACE Step 1. Slide the fireplace into prepared fram- ing or position fireplace in its final position and frame later. The fireplace may not be recessed into a com- bustible floor. Maintain the floor to hearth clearance established by the fireplace lower front f ...
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Lennox Hearth LSO-43 - page 6
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 6 FIREPLACE SPECIFICATIONS Figure 9 Step 3. Refer to fireplace drawings and speci- fications on pages 6 and 7 for framing dimen- sions and details. Frame appliance enclosure as illustrated in Figures 10 through 13 on page 7. IMPORTANT: UNDER NO CIRCUMSTANCES CAN THE FIREPLACE TOP SPACERS ( FIGURE 9 ) ...
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Lennox Hearth LSO-43 - page 7
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 7 Note: The framed depth, 25 ⁵⁄₈ " (651 mm) from a framed wall, must always be measured from a finished surface. If a wall covering such as drywall is to be attached to the rear wall, then the framed depth must be measured from the drywall surface. It is important that this dimension be ex ...
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Lennox Hearth LSO-43 - page 8
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 8 Step 4. The fireplace should be secured to the side framing members through the nailing flange ( Figure 16 ). Figure 16 Note: The nailing flange and the area directly behind the nailing flange is exempt from the clearances described on the fireplace clear- ance label. Step 5. Connect the 6" (1 ...
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Lennox Hearth LSO-43 - page 9
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 9 Figure 20 Figure 21 Figure 22 The outer chimney section installs the opposite way; the lanced end goes down and each new section installs OVER the outside of the previ- ous section ( Figure 23 ). Figure 23 Continue to assemble the chimney up through framed opening. Assemble just enough to pen- etra ...
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Lennox Hearth LSO-43 - page 10
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 10 Note: If chimney extends more than 8' above roof surface, guy wires are also recommended. Use three (3) guy wires, attach to locking band assembly, extend and secure to roof in a triangular pattern (Figure 29 ). Guy wires are not supplied by the manufacturer. Step 7. The standard Security FTF ...
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Lennox Hearth LSO-43 - page 11
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 11 MULTIPLE TERMINATIONS If more than one termination is located in the same chase or within the same general prox- imity, we suggest they should be separated in distance at least 24" horizontally from flue center to flue center and stacked or staggered vertically at least 18" apart, from t ...
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Lennox Hearth LSO-43 - page 12
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 12 Figure 34 Figure 35 Return elbow support straps must be securely attached under tension (in shear) to structural framing members above. Do not substitute a FTF10-30 offset elbow in place of a FTF10-E30 return elbow. OFFSET CALCULATIONS Step 1. Use Offset Chart to determine amount of horizontal off ...
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Lennox Hearth LSO-43 - page 13
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 13 FTF10 VERTICAL ELEVATION CHART 11 0 11 1 0 0 279 0.28 17 1 5 0 1 0 432 0.43 21 ¹⁄₄ 19 ¹⁄₄ 2 0 0 540 0.54 27 ¹⁄₄ 23 ¹⁄₄ 1 1 0 692 0.69 33 ¹⁄₄ 29 ¹⁄₄ 0 2 0 845 0.85 35 2 11 0 0 1 889 0.89 37 ¹⁄₄ 31 ¹⁄₄ 2 1 0 946 0.95 43 ¹⁄₄ 37 ¹⁄₄ 1 2 0 1099 1.10 51 ...
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Lennox Hearth LSO-43 - page 14
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 14 Figure 36 Figure 37 INSTALLING OFFSETS First, review the Offset Elevation Chart and Figure 37 for reference. Step 1. Determine the offset distance where chimney is to pass through the first ceiling- dimension “A.” To find this point on your ceil- ing, first determine the center point for a ver ...
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Lennox Hearth LSO-43 - page 15
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 15 Note: See Framing and Dimension Chart for the sizes of the ceiling and roof openings. The size of the roof opening varies with the degree of pitch of the roof. Offset Elbow Assembly Offset elbows install the same as chimney sections. First, snap the inner section INTO the preceding inner section o ...
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Lennox Hearth LSO-43 - page 16
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 16 Figure 41 A B D C C Figure 40 Hearth Extension Dimensions Opening Width 43" A 20" (508 mm) B 43" (1092 mm) C 12" (305 mm) D 62" (1575 mm) Finished Wall Header Noncombustible Wall Covering Fireplace Opening U.S. Installation 12" Min. Combustible Mantel Spacer * A 1 ¹? ...
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Lennox Hearth LSO-43 - page 17
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 17 Figure 42 Side Wall cannot be Closer than 12" (305mm) under any Circumstances A B C C D Wall Shield Calculating Minimum Thickness if Multiple Materials are Used At times it is important to know what combination of materials are acceptable for use as floor protection. The “R values” are us ...
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Lennox Hearth LSO-43 - page 18
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 18 Storm Collar 63L59 FSC Locking Band 63L60 FLB Figure 44 FINISH TO YOUR TASTE There are a wide variety of “finished looks” for these fireplaces, from formal wall decor with elaborate mantels to rustic wood paneling or warm brick facings. Only noncombustible materials like stone, tile, brick, et ...
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Lennox Hearth LSO-43 - page 19
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 19 63L16 FTF10-12 63L17 FTF10-18 Chimney Section 63L18 FTF10-36 63L40 F10F6 Flashing 63L41 F10F12 Round Termination 63L43 FTF10-CTD Chase Termination (Square) 63L49 FTF10-CT1 Firestop Spacer (Flat) 63L36 F10FS-2 Chase Termination (Round) 63L46 FTF10-CTDT Chase Termination (Square) 63L52 FTF10-CT2 Sta ...
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Lennox Hearth LSO-43 - page 20
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. 20 LENNOX 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. Printed in U.S.A. © 2002 by LENNOX P/N 850,015M REV. C 03/2007 11 ...
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