Lennox Hearth LSO-43 installation instructions Or Ceiling, Chimney 30 Offset Through Floor

CHIMNEY 30° OFFSET 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 20 and 21. Support the chimney at floor or ceiling penetration with a FTF10 stabilizer if distance of chimney below ceiling is 10' or more. Maintain 2" minimum air space to combustibles from chimney sections.

F10FS30-2

Firestop Spacer 2" (51mm)

Min. Air

Space

FTF10-S4

2" (51mm)Stabilizer

Min. Air

Space

10' (3m) Max.

30° Firestop

and Space Above

Figure 20

F10FS30-2

Firestop Spacer 2" (51mm)

Min. Air

Space

2" (51mm)	FTF10-S4
Min. Air	Stabilizer
Space

10' (3m) Max.

30° Firestop and

Space Above

Figure 21

Step 3. Note: All chimney sections are con- structed with a unique locking tabs and hem design, which ensures and immediate, tight assembly between sections. Plan your chimney requirements carefully before assembly, as the chimney is difficult to disassemble after instal- lation. If disassembled, the tabs might become damaged. Be certain that the tabs are properly formed to ensure they engage properly.

Note: For Canadian installations, all chimney installedoutsidethebuildingmustbeconstructed with galvalume (outer sections only) effective January 1, 1992. The appropriate model desig- nations are located in the back of this manual.

The FTF10 chimney system is a two piece chim- ney that snap locks together from the fireplace up. Always start with the inner flue section. With the lanced end up, snap lock the joint into the matching collar on top of the fireplace. At all subsequent joints, the upper flue section fits into the lower or preceding flue section. Each section snaps together by means of locking tabs (9 tabs per joint). Check each section by pulling up slightly from the top to ensure proper engage- ment before installing succeeding sections. If the flue has been installed correctly, it will not separate when tested. Also, the inner flue joint where each section is joined should be tight and flat without gaps (Figure 22 ).

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 ).

Locking Tabs (Lances)

Figure 23

Note: Assemble one component of chimney at a time (inner section first; then outer section last) before preceding with the next complete section.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Continue to assemble the chimney up through framed opening. Assemble just enough to pen- etrate the roof flashing openings (Figure 24 ). Always maintain 2" minimum air space to com- bustible materials and always check each chim- ney joint (inner and outer) to ensure proper engagement. Check vertical alignment of chim- ney so that it projects from the roof in true vertical position.

2" (51mm) Min.

Air Space to Combustibles

Figure 24

Security's chimney sections do not need to be screwed together. Additional reinforcement is not necessary except in certain offset condi- tions (refer to page 12, Figure 35 ).

Step 4. The height of vertical chimney pipe supported only by the fireplace must not ex- ceed 30'. Chimney heights above 30' must be supported by a Model FTF10-S4 stabilizer in- stalled at 30' intervals.

Note: The Model FTF10-S4 adds 3" net effective height to the total chimney system.

Install the Model FTF10-S4 stabilizer by fitting inner section down into respective section of proceeding flue pipe and locking outer stabi- lizer section into place over the outer chimney pipe. Position for proper clearance through framed opening and nail straps securely (under tension in “shear”) into place on framing. Use 8d nails. Attach successive lengths of chimney pipe directly to stabilizer using same tech- niques as described in Step 3 (Figure 25 ).

FTF8-S4 Stabilizer

Figure 25

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