NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
2
Note:
The installation of the thimble extension
(F8-TE26 in the US or F8-TE26-2 in Canada )
is not required in manufactured homes having
ventilated attic spaces, when the chimney height
is equal to or greater than 12 feet.
Ensure the thimble penetrates the roof opening.
The thimble must extend completely through the
ceiling or roof cavity to the outermost plane of
the roof. Note: Thimble extensions (F8-TE26)
are available from your dealer for constructions
in which the distance between the outside of the
roof and the inside of the ceiling exceeds 13".
The thimbles and their extensions provide for
zero clearances to combustibles and must be
used at the ceiling/roof in manufactured homes
(
see Figures 4 and 5
).
Step 4.
Note:
Chimney sections are con-
structed with a unique locking tab design,
which ensures an immediate, tight assembly
between sections. Plan your chimney require-
ments carefully before assembly as chimney
is difficult to disassemble after installation. If
disassembled, the tabs might become damaged.
Be certain tabs are properly formed to ensure
locking tabs engage properly.
The Security Chimneys FTF8 chimney system is
a two piece chimney, which snap together from
the fireplace up. Start with the inner flue section
with the lanced end up, snap lock it in to the
matching collar on top of the fireplace.
Note:
Assemble one component of chimney
at a time (inner section first, then outer section
last) before proceeding with the next complete
section.
Continue to assemble the chimney up through
framed opening. Assemble just enough to
penetrate the roof flashing openings (
Figure
8
)
. Maintain 1"* minimum air space to insula-
tion and building materials and always check
each chimney joint (inner and outer) to ensure
proper engagement. Check vertical alignment
of chimney so that it projects from the roof
in true vertical position.
Security's chimney sections do not need to be
screwed together. Additional reinforcement is
not necessary except in certain offset conditions
(refer to
Page 7, Figure 22
)
.
Step 5.
The height of vertical chimney pipe
supported only by the fireplace must not exceed
30'. Chimney heights above 30' must be sup-
ported by a Model FTF8-S4 stabilizer installed
at 30' intervals.
Note:
The Model FTF8-S4 adds 3" net effective
height to the total chimney system.
Install the Model FTF8-S4 stabilizer by fitting
inner section down into respective section of
proceeding flue pipe and locking outer stabilizer
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 techniques as
described in
Step 4
(
Figure 9
).
Note:
Do not apply excessive pressure to any
subsequent chimney sections following the
stabilizer when installing. Ensure each subse-
quent chimney section is securely attached by
testing as noted in
Step 4
.
Step 6.
Select the proper Security Chimneys
roof flashing based on pitch of roof. Use chart
below for selection:
WARNING
Do not allow insulating materials to
be blown into the space inside the
thimble and the chimney. To do so
could result in a fire hazard.
Figure 9
FTF8-S4 Stabilizer
Roof Pitch
FTF8
Flat to 6/12
F8-F6
6/12 to 12/12
F8-F12
Table 1
Figure 6
Outer pipe section installs in just the opposite
way; the lanced end goes down and each new
section goes OVER the outside of the previous
section installed (
Figure 7
).
Figure 7
Locking
Tabs
(Lances)
Thimble Cathedral
Ceiling
14" Min.
Outer Pipe Of
Chimney
Use Adjustable Thimble
FM8-AT1 For All Ceiling
Piches, From Flat To
3/12 Pitch.
**Note: 2” clearance to combustibles required
in Canada.
At all subsequent joints, the upper flue section
fits into the preceding flue section. Each piece
snaps together by means of locking tabs (9
locking tabs per joint). Check each piece by
pulling up slightly from the top to ensure proper
engagement before installing the next section.
If the flue has been installed correctly, it will not
separate when you REV. NC it. Also, the inner
flue joint where each section is joined should
be tight and flat without gaps
(
Figure 6
).
Figure 5
Note:
For Canadian installations, all chimney
installed outside the building must be constructed
with galvalume (outer sections only) effective
January 1, 1992. The appropriate model designa-
tions are located in the back of this manual.
1"** Min. Air Space
To Combustibles
Figure 8
