LG Electronics LS43ST Indoor Fireplace User Manual

Check vertical alignment of chimney pipe so
that it projects from the roof in a true vertical
position. Security's chimney sections do not
need to be screwed together. Additional rein-
forcement is not necessary, except in certain
offset conditions (see to page 16,
Figure 47
Step 5. The height of vertical chimney pipe
supported only by the fireplace must not ex-
ceed 30' (9.1 m). Chimney heights above 30'
(9.1 m) must be supported by a Model FTF13-
S4 stabilizer installed at 30' (9.1 m) intervals.
Note: The Model FTF13-S4 adds 3" (76 mm) net
effective height to the total chimney system.
Install the Model FTF13-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 (un-
der 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 25
The FTF13 chimney system is a two-piece
chimney, which snaps together from the fire-
place up. Start with the inner flue section. With
the lanced end up, snap-lock it into the match-
ing collar on top of the fireplace. At all subse-
quent joints, the upper flue section fits into the
preceding flue section. Each piece snaps to-
gether by means of locking tabs (7 locking
tabs per joint). Check each piece 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 you test it. Also, the inner flue
joint where each section is joined should be
tight and flat without gaps (
Figure 22
Figure 22
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 23
Locking Tabs
Figure 23
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 ceiling opening. Assemble just enough
to penetrate the roof flashing openings (
). Always maintain 2" (51 mm) minimum air
space to combustible materials and always
check each pipe joint (inner and outer) to
ensure proper engagement.
2" (51mm) Min. Air Space
to Combustibles
Figure 24
Figure 26
Framing Dimensions for Ceiling
Ceiling Opening
Flue Type A B
FTF13, Vertical 19" 19"
at 2" (51 mm) (483 mm) (483 mm)
FTF13, Offset 19" 29"
At 2" (51 mm) (483 mm) (737 mm)
Figure 27
Framing Dimensions for Roof
FTF13 at 2" (51 mm)
Pitch C D*
0/12 19" 19"
(483 mm) (483 mm)
6/12 19" 20"
(483 mm) (508 mm)
12/12 19" 27"
(483 mm) (686 mm)
* Perpendicular to Roof Ridge.
Ceiling Framing
Roof Framing
FTF13-S4 Stabilizer
Figure 25
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.