INSTALLATION INSTRUCTIONS MAGNA-FIRE 43" Wood Burning Fireplace P/N 850,004M REV. F 10/2006 LENNOX HEARTH PRODUCTS MODELS LS43ST This installation manual will enable you to obtain a safe, efficient and dependable installation of your fireplace system. Please read and understand these instructions before beginning your installation. Do not alter or modify the fireplace or its components under any circumstances.
TABLE OF CONTENTS Safety Rules .................................... page 2 Tools and Building Supplies ............ page 2 Precautions ..................................... page 3 Introduction ..................................... page 3 Clearances/Height Requirements ..... page 3 Chimney System ............................. page 4 Assembly Outline ............................. page 4 Location of Fireplace ....................... page 4 Assembly Steps ...............................
PRECAUTIONS Note: These fireplace systems are not difficult to install. However, in the interest of safety, it is recommended that the installer be a qualified or certified “tradesman” familiar with commonly accepted fireplace installation and safety techniques as well as prevailing local codes.
CHIMNEY SYSTEM These fireplaces are designed and code listed for use with Security Chimneys FTF13 chimney System only. Always use Security Chimneys FTF13 chimney components with these fireplaces. Do not modify or alter these components as this may cause a potential serious hazard and void the Warranty. Insulate Joists Same As Ceiling WARNING: DO NOT PACK OR FILL REQUIRED AIR SPACES WITH INSULATION OR OTHER MATERIAL. NO MATERIAL IS ALLOWED IN THESE AREAS.
When locating the fireplace, consideration must be given to combustibles and final finishing. For an example of this, see Figure 5 and confine the final location of combustible finish materials to the "Safe Zone". DO NOT permanently place furniture or other items such as decorative pillows within 60" of the fireplace front face.
IMPORTANT: UNDER NO CIRCUMSTANCES CAN THE FIREPLACE TOP SPACERS (FIGURE 10 ) BE REMOVED OR MODIFIED, NOR MAY YOU NOTCH THE HEADER TO FIT AROUND OR BE INSTALLED LOWER THAN THE SPACERS. THE HEADER MAY BE IN DIRECT CONTACT WITH THE TOP SPACERS BUT MAY NOT BE SUPPORTED BY THEM. Platform FRAMING WALL VARIATIONS As many as six (6) different framed wall configurations can be constructed to enclose the LS43ST fireplace. The following illustrations depict these variations of wall enclosures.
FRAMING SPECIFICATIONS 58 ⁵⁄₈" (1490 mm) 47 ¹⁄₈" (1197 mm) 54 ³⁄₄" (1391 mm) 26 ¹⁄₄" (667 mm) Figure 14 19 ¹⁄₄" (489 mm) Allow 19” For Clearance 26 ¹⁄₄" (667 mm) For ⁵⁄₈" Drywall 26 ¹⁄₂" For ¹⁄₂" Drywall 58 ⁵⁄₈" (1490 mm) 47 ¹⁄₈" (1197 mm) 54 ³⁄₄" (1391 mm) Side View Front View Figure 15 Figure 16 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
FIREPLACE SPECIFICATIONS 27 ⁹⁄₁₆" (701 mm) 52 ¹¹⁄₁₆" (1335 mm) 58 ¹⁄₂" (1486 mm) 44 ¹⁄₈" (1121 mm) 24 ⁵⁄₈" (625 mm) 20 ¹⁄₁₆" (508 mm) Outside Air Inlet This Side Only 47" (1194 mm) Gas Line Inlet 9 ¹⁄₂" (241 mm) 39 ⁵⁄₁₆" (1002 mm) 8" (203 mm) 42 ³⁄₄" (1086 mm) 11 ³⁄₄" (298 mm) 11 ³⁄₄" (298 mm) 52 ³⁄₄" (1340 mm) End View Front View 52 ³⁄₄" (1340 mm) 27 ⁹⁄₁₆" (700 mm) Top View Figure 17 8 8 ¹⁄₂" (216 mm) NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Step 4. Two sets of nailing tabs have been provided. One set of four is to accommodate ⁵⁄₈" drywall and the other set is for ¹⁄₂" drywall. To insert the unit into prepared framing, bend the four nailing flanges adjacent to one of the fireplace faces completely over 180 degrees until they are flush with the cabinet. Bend the remaining nailing flanges adjacent to the opposite face out 90 degrees (see Figure 18 ).
The FTF13 chimney system is a two-piece chimney, which snaps together from the fireplace up. Start with the inner flue section. With the lanced end up, snap-lock it into the matching collar on top of the fireplace. At all subsequent joints, the upper flue section fits into the preceding flue section. Each piece snaps together by means of locking tabs (7 locking tabs per joint).
Step 6. Select proper Security Chimneys roof flashing based on pitch of roof. Use chart below for selection: Roof Pitch FTF10 Flat to 6/12 F10-F6 6/12 to 12/12 F10-F12 Next, slide roof flashing over extended chimney section that previously has been installed above the roof opening in Step 4. FTF10 flashings require flashing spacers. Slide flashling all the way down until the flashing base rests flat on the roof (Figure 28 ).
2. Determine the number of chimney components required, except chimney sections. This would include firestop spacers, stabilizers, roof flashing, etc. Less Than 10' (3m) 2' Min. (610mm) 2' Min. (610mm) 3. The effective heights of the components are: 2' Min. (610mm) 3' Min. (916mm) Figure 33 TEN FOOT RULE SUMMARY 18" (457mm) The minimum chimney height above the roof and/or to adjacent walls and buildings is specified by all major building codes.
FTF13 VERTICAL ELEVATION CHART Height Of Chimney Only Inches 11 17 21 27 33 35 37 43 51 55 61 67 69 79 85 89 95 103 113 119 123 129 137 147 153 158 164 171 182 188 192 198 206 215 222 226 232 240 250 256 260 266 274 284 290 294 300 308 318 324 328 334 342 352 358 363 369 376 387 393 397 403 411 421 427 431 437 445 455 ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₂ ¹⁄₂ ¹⁄₄ ¹⁄₂ ¹⁄₂ ³⁄₄ ³⁄₄ ¹⁄₂ ³⁄₄ ³⁄₄ ³⁄₄ ³⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₂ ¹⁄₂ ¹⁄₄ ¹⁄₂ ¹⁄₂ ³⁄₄ ³⁄₄ ¹⁄₂ ³⁄₄ ³⁄₄ ³⁄₄ ³⁄₄ ³⁄₄ ³⁄₄ ³⁄₄ ³⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄₄ ¹⁄
FTF13 OFFSET ELEVATION CHART A Offset B Height FTF13-ES30 Offset/Return FTF13-S4 Number of FTF13 Chimney Sections A Offset B Height (Inches) (Inches) Elbow Set Stabilizer 12" 18" 36" (mm) (mm) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 1 0 2 1 0 0 2 1 1 0 0 2 4 1 3 0 0 2 1 1 3 0 0 2 1 1 0 0 2 1 1 0 2 1 1 0 2 1 3 0 1 0 0 1 0 1 2 0 1 2 0 3 1 0 1 1 0 2 0 1 4 0 1 3 1
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' (6.1 m) in total length between elbows (see Figure 36 ). If sections of pipe exceed 10' (3 m) between elbows, a chimney stabilizer must be used at the midpoint. The stabilizer support straps must be attached under tension (in shear) to structural framing members above.
CHIMNEY OFFSET 30° THROUGH FLOOR OR CEILING It may be necessary to assemble the chimney at 30° when passing through the floor or ceiling area. Use the F10FS30-2 firestop spacer as shown in Figures 42 and 43. Support the chimney at floor or ceiling penetration with a FTF13 stabilizer if distance of chimney below ceiling is 10' (3 m) or more. Maintain 2" (51 mm) minimum air space to combustibles from chimney sections. The chimney must pass vertically through the attic space.
CAUTION: NEVER LOCATE THE AIR INLET WHERE IT COULD BE BLOCKED BY SHRUBS, SNOW DRIFTS, ETC. NEVER LOCATE THE AIR INLET IN GARAGE OR ANY AREA WHERE THERE IS ANOTHER FUEL BURNING APPLIANCE OR PRODUCTS EMITTING COMBUSTIBLE GASES SUCH AS PAINT, GASOLINE, ETC. IN COLD CLIMATES, IT IS RECOMMENDED THAT THE COMBUSTION AIR DUCT BE INSULATED. Note: Do not terminate combustion air kit in attic space under any circumstances. CAUTION: IN NO EVENT MAY THE TOTAL DUCT FOR BRINGING IN OUTSIDE AIR EXCEED 50' (15.2 M).
Hearth Extension Dimensions A 20" B 39-3/8" C 12" D 63-3/8" C Note: To convert inches to millimeters divide by 0.03937 C B A D Figure 48 Methods of Determining Hearth Extension and Wall Shield Equivalents - To determine the thickness required for the alternate material when either the “k” value or “r” value is known, use either the k formula or r formula.
A wall shield is required where a continuous perpendicular side wall is within 12" of the fireplace opening (Figure 49 ). Use a 36" W x 36" H wall shield constructed of a durable, noncombustible material having an equal or better (lower k value) insulating value than k = .54 BTU IN/FT2 HR °F. At no time may a perpendicular side wall be located closer than 9" from the fireplace opening. If fireplace is installed diagonally across a 90° corner; no wall shields are required. Side Wall 12" (305 mm) Min.
INSTALLATION COMPONENTS Chase Termination (Square) Chase Termination (Square) Firestop Spacer (Flat) Firestop Spacer (30°) 63L54 63L50 63L36 63L37 63L19 63L20 63L21 FTF13-12 FTF13-18 FTF13-36 Chase Termination (Round) 63L44 FTF13-CTD Chase Termination (Round) 63L47 FTF13-CTDT FTF13-CT2 Chimney Section FTF13-CT1 Offset/ Return Package (30°) 63L24 FTF13-ES30 Storm Collar 63L59 FSC Flashing 63L40 63L41 F10F6 F10F12 FLB Stabilizer 63L27 FTF13-S4 F10FS-2 F10FS30-2 Locking Band