LG MAGNA-FIRE LS43ST User's Manual

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. Any modification or alteration of the fireplace system,
including but not limited to the fireplace, chimney components and
accessories, may void the warranty, listings and approvals of this system
and could result in an unsafe and potentially dangerous installation.
IMPORTANT! TO ASSURE PROPER ALIGNMENT OF GLASS DOORS:
INSTALL THIS FIREPLACE IN A SQUARE AND PLUMB CONDITION,
USING SHIMS AS NECESSARY AT SIDES AND/OR BOTTOM.
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
OTL Report No. 116-F-19-02
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
1
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 ............................... page 5
Preinstallation Notes ........................ page 5
Clearances ....................................... page 5
Installing the Fireplace ..................... page 5
Framing Wall Variations .................. page 6
Framing Specifications .................... page 7
Fireplace Specifications .................. page 8
Installing the Chimney System ........ page 9
Ten Foot Rule Summary .................. page 12
Multiple Terminations ...................... page 12
Chimney Component Calculations ... page 12
Special Offset Instructions ............... page 12
Vertical Elevation Chart ................... page 13
Offset Elevation Chart ..................... page 14
Offset Calculations ........................... page 15
Installing Offsets .............................. page 15
30° Offset through Floor/Ceiling ...... page 16
Glass Doors ..................................... page 16
Optional Equipment Considerations . page 16
Combustion Air Kits ........................ page 16
Gas Line Connection ........................ page 17
Cold Climate Insulation .................... page 17
Fireplace Finishes ............................ page 17
Mantels and Trim ............................. page 17
Hearth Extensions ............................ page 17
Finish Requirements ........................ page 19
Installation Components .................. page 19
IMPORTANT: PLEASE READ AND
UNDERSTAND THESE RULES TO
FOLLOW FOR SAFETY.
1. Before starting your fireplace installation,
read these installation instructions carefully to
be sure you understand them completely and in
entirety. Failure to follow them could cause a
fireplace malfunction resulting in serious injury
and/or property damage.
2
2. Always check your local building codes. The
installation must comply with all local, regional,
state and national codes and regulations.
3. These fireplaces must be installed with
Security Chimneys FTF13 (12 ¹⁄₂" inside diameter) Chimney System only. These systems
are intended for use in any application where
a traditional masonry type fireplace would
apply. The chimney system must always vent
to the outside of the building.
4. To ensure a safe fireplace system and to
prevent the build-up of soot and creosote,
inspect and clean the fireplace and chimney
prior to use and periodically during the heating
season.
5. Use solid fuel only. DO NOT use artificial
wax based logs, chemical chimney cleaners or
flame colorants in your fireplace.
6. DO NOT use charcoal or coal under any
circumstances.
7. NEVER use gasoline, gasoline-type lantern
fuel, kerosene, charcoal lighter fluid, or similar
liquids to start or “freshen up” a fire in this
fireplace. Keep any flammable liquids a safe
distance from the fireplace.
The manufacturer is not responsible for any
smoking or related problems that may result
from the lack of adequate combustion air. It is
the responsibility of the builder/contractor to
ensure that adequate combustion air has been
provided for the fireplace.
13. DO NOT use a fireplace insert or any other
products not specified herein by the manufacturer
for use with this fireplace. All gas log sets must be
operated with the damper clamped open.
14. "Smoke free” operation is not warranteed
nor are we responsible for inadequate system
draft caused by mechanical systems, general
construction conditions, inadequate chimney
heights, adverse wind conditions and/or unusual environmental factors or conditions beyond our control.
15. Never, under any circumstances, install a
fireplace, chimney component or any accessories, that has visible or suspected physical
damage as a result of handling or transportation. These items should be inspected by your
distributor or qualified factory representative
to ensure safe condition. When in doubt, consult your distributor.
8. NEVER leave children unattended when
there is a fire burning in the fireplace.
16. For additional safety considerations and
complete operating instructions, refer to the
Care and Operation Manual provided with the
fireplace.
9. Always keep flue damper open when heat is
present in the fireplace.
TOOLS AND BUILDING SUPPLIES
NORMALLY REQUIRED
10. Before servicing, allow the fireplace to
cool. Always shut off any electricity or gas to
the fireplace while working on it. This will
prevent any possible electrical shock or burns.
Tools should Include:
Phillips screwdriver
Hammer
Saw and/or sabersaw
Level
Measuring tape
Plumb line
Electric drill and bits
Pliers
Square
11. This fireplace is not intended to heat an
entire home or be used as a primary heat
source. It is designed to ensure homeowner
comfort by providing supplemental heat to the
room.
12. Always ensure an that adequate supply of
replacement combustion air from the outside
of the house is accessible to the fire to support
normal combustion. Fireplaces consume large
volumes of air during the normal combustion
process. In the event the home is tightly sealed
with modern energy efficient features, the optional combustion air kit may not provide all
the air required to support combustion.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Building supplies:
Framing materials
Wall finishing materials
Caulking materials (noncombustible)
Fireplace surround and hearth
extension materials (noncombustible)
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.
The most important areas of concern dealing
with the installation of factory-built fireplaces are
clearances to combustible materials, proper assembly of component parts, height of the chimney system, the proper use of accessories supplied by the manufacturer and the techniques
employed in using finishing materials applied to
the wall surrounding the fireplace, hearth extensions and wall shields. Each of these topics will
be covered in thorough detail throughout this
manual. Please give each your special attention
as you progress with your installation.
TYPICAL INSTALLATION
INTRODUCTION
General Information
CLEARANCES AND HEIGHT
REQUIREMENTS
This Signature Series LS43ST is a radiantheat, two-sided fireplace with a variety of
glass door options. A steel grate is also included with the LS43ST to properly position
the fire. An outside combustion air kit is
available as optional equipment.
The fireplace may be placed on or near normal
construction materials*. The combustion air
kit, firestop spacer and roof flashing (not chase
flashings) may be placed directly on or against
normal construction materials.* The chimney
and fireplace outer wrapper require a minimum 2" and 1" air space to combustibles
respectively. A combustible mantle may be
installed 12" above the opening of the fireplace
as per NFPA 211, Section 7-2.3.3.
Note: Illustrations shown reflect “typical” installations with nominal dimensions and are for
design and framing reference only. Actual installations may vary due to individual design preferences. However, always maintain minimum clearances to combustible materials and do not violate any specific installation requirements.
These fireplaces have been tested and listed
by Omni-Test Laboratories (Report No. 116F-19-02) to U.L. standard 127. These units
are intended for installation in residential
homes and other buildings of conventional
construction including commercial, not in
mobile homes.
These fireplace systems are designed for installation in accordance with the National Fire
Protection Standard for chimneys, fireplaces
and solid fuel burning appliances; NFPA 211
and in accordance with codes such as the BOCA
Basic/National Codes, the Standard Mechanical Code and the Uniform Building Codes.
The local authority having jurisdiction should
be consulted before installation, to determine if
any permits need to be obtained.
Chimney and
Termination
WARNING: FAILURE TO USE MANUFACTURE PROVIDED PARTS, VARIATIONS IN
TECHNIQUES AND CONSTRUCTION MATERIALS OR PRACTICES OTHER THAN
THOSE DESCRIBED IN THIS MANUAL
MAY CREATE A FIRE HAZARD AND VOID
THE LIMITED WARRANTY.
The fireplace opening of the LS43ST must be
kept a minimum of 12" (305 mm) from a side
wall. A perpendicular side wall can not be
closer that 12" (305 mm) to the LS43ST
fireplace.
As with all chimney installations, avoid overhead obstructions such as trees, power lines,
etc. Additionally chimney terminations must
meet certain clearance to roof requirements
detailed in the paragraph titled Ten-Foot Rule
Summary.
The fireplace and chimney system must be
enclosed when installed in or passing through
a living area where combustibles or people
may come in contact with it. This is important
to prevent possible personal injury or fire
hazard.
For questions, please call your distributor or
the manufacturer. Special restrictions apply to
the front and facing of the fireplace and nearby
walls (See pages 18, 19 and 20 ).
*Construction Materials:
• framing materials
• particle board
• dry wall
• plywood
• paneling
• flooring
• etc.
The LS43ST system consists of three “subsystems”:
1. The Fireplace and Door Assemblies
2. The Chimney and Termination
3. The Optional Combustion Air Kit
Model LS43ST
Figure 1
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
3
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.
Note: Do not insulate the chase cavity with
blown or fill type insulation materials.
Minimum System Height
Model LS43ST
Firestop
FTF13
CTDT
Termination
Note: NonCombustible
Chase
Flashing
Must Be
Used To
Cover
Chase
Opening
Lintel
Security's
FTF13
Vertical Installation
14' 0" (3.7 m)
One Offset
15 ¹⁄₂ 0" (3.9 m)
Two Offsets
22' 0" (5.6 m)
Figure 3
LOCATION OF FIREPLACE
Carefully select the proper location for heat
circulation, aesthetics, chimney obstructions
and clearance to side wall(s). With proper preplanning, a slight adjustment of a few inches
can save considerable time and expense later
during construction and assembly.
Chase Enclosure
Optional
Insulation
In Outside
Walls Of
Chase
Solid
Continuous
Surface
Insulation
(Thermal Barrier)
A chase is a vertical box-like structure constructed to surround the fireplace and chimney. Refer to Figure 2 for a typical chase
configuration. A chase should be constructed
and insulated just like any outside wall. Chase
insulation in a cold climate installation is not
required for safety.
ASSEMBLY OUTLINE
Before You Start
8'
Level
Outside
Base
Figure 2
WARNING: IF INSULATION IS USED, THE
FIREPLACE MUST NOT BE PLACED DIRECTLY AGAINST IT. INSULATION OR
VAPOR BARRIERS, IF USED, MUST FIRST
BE COVERED WITH GYPSUM BOARD,
PLYWOOD, PARTICLE BOARD OR OTHER
MATERIAL TO ASSURE INSULATION AND
VAPOR BARRIERS REMAIN IN PLACE.
4
Damper
Open
Chimney Height
The total height of your LS43ST fireplace
system from the surface the fireplace rests
on to the chimney top must not exceed 80'
(24.4m) and must also meet minimum system height chart.
Draft Stops
Damper
Closed
Check your inventory list to be sure you have all
the necessary parts supplied in good usable
condition. Check also for any concealed damage.
Check the operation of the damper. The damper
is controlled through the use of a control lever
located within the firebox opening at the top
center just behind the firebox lintel (Figure 3 ).
The control lever snaps into place at the extreme range of motion, up and back in the
closed position. When pulled forward and
down, the damper is open.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 4
Carefully consider the position of the fireplace
opening with respect to the location of adjacent or nearby stairwells, bath or kitchen exhaust fans and/or return air registers for forced
air furnaces/air conditioners that could cause
a smoking fireplace condition if the house is
tightly insulated.
This system is intended to be installed in residential homes and buildings of conventional
construction, not in mobile homes.
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.
Black Portion Of Frame
Not To Be Covered With
Combustible Materials
Wall
Covering
7”
30°
PRE-INSTALLATION NOTES
INSTALLING THE FIREPLACE
The fireplace may be installed directly on a
combustible floor or raised on a platform of an
appropriate height. Do not place fireplace on
carpeting, vinyl or other soft floor coverings. It
may, however, be placed on flat wood, plywood, particle board or other hard surfaces.
Be sure fireplace rests on a solid continuous
floor or platform with appropriate framing for
support and so that no cold air can enter the
room from under the fireplace.
Step 1. Slide the fireplace into prepared framing or position fireplace in its final position and
frame later.
The fireplace may be positioned and then the
framing built around it, or the framing may be
constructed and the fireplace positioned into
the opening.
4”
Step 2. Insert the provided metal safety strips,
beneath the fireplace as illustrated (Figures 6, 7
and 8 ). The safety strips should overlap ¹⁄₂" for
continual coverage of the floor.
Note: Safety strips are not required when fireplace rests on a noncombustible surface.
Usually, no special floor support is needed for
the fireplace, however, to be certain:
Door
Opening
12”
Min.
The fireplace may not be recessed into a combustible floor. Maintain the floor to hearth clearance established by the fireplace lower front
face.
Safe
Zone
Figure 5
ASSEMBLY STEPS
Note: The following steps represent the normal
sequence of installation. Each installation is
unique, however, and might require a different
sequence.
1. Position firebox prior to framing or into
prepared framing.
2. Install the chimney system.
3. Install optional outside combustion air kit.
4. Plumb gas line if a decorative gas appliance
will be used. (Gas connections should only be
performed by an experienced, licensed/certified tradesman).
6. Install both door assemblies.
7. Complete finish wall material, surround and
hearth extension to your individual taste.
Study the three dimensional illustration (Figure 1 ) to get a general idea of each element of
your fireplace system.
1. Estimate the total weight of the fireplace
system including chimney and surround materials such as brick, stone, etc., to be installed. Shipping weights for the fireplace may
be found on page 20.
2. Measure the square footage of the floor
space to be occupied by the system, surrounds
and hearth extensions.
3. Note the floor construction, i.e. 2 x 6’s, 2 x 8’s
or 2 x 10’s, single or double joists, type and
thickness of floor boards.
Hearth
Extension
Hearth
Extension
Metal Safety
Strips
Floor
Floor
Figure 6
4. Use this information and consult your local
building code to determine if you need additional support.
If you plan to raise the fireplace and hearth
extension, build the platform assembly then
position fireplace and hearth extension on top.
Secure the platform to the floor to prevent
possible shifting.
CLEARANCES
Minimum clearance to combustibles for the
appliance is as follows: sides - 1" (25 mm),
floor - 0" (0 mm), adjacent wall - 12" (305 mm),
ceiling - 37 ¹⁄₂" (953 mm).
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Hearth
Extension
Hearth
Extension
Metal Safety
Strips
Platform
Floor
Figure 7
Note: Install the hearth extension only as illustrated.
5
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. Several of these designs may incorporate book
shelves, wood storage boxes, etc.
Metal
Safety Strips
LS43ST - Wall Types
4 x 6 Header
2" Min.
(51 mm)
Figure 8
2 x 4 False
Header
“C” Type Wall
Spacer
*
Metal
Safety Strips
“T” Type Wall
*
* 2" Min.
(51 mm)
Figure 10
No Combustible
Materials in
Shaded Areas
Figure 9
The safety strips should extend in front and
sides of the fireplace opening 2" (51 mm) . In
the event a wooden support is used to elevate
the fireplace above the floor, a “Z” type safety
strip should be fabricated and used to protect
the front surface of the wood support as well
as the floor beneath the hearth extension (see
Figures 8 and 9 ). The safety strips should be
tacked down to prevent possible movement.
“L” Type Wall
Note: A minimum 2”
air space clearance
to combustibles and
any portion of the
chimney is required.
Note: The “Z” type safety strip is not supplied.
Step 3. Refer to fireplace drawings and specifications on pages 7 and 8 for framing dimensions and details. False header may be positioned directly on top of the fireplace spacers
(see Figures 10, 11 and 12 ).
“H” Type Wall
Figure 11
No Combustible
Materials in
Shaded Areas
“Y” Type Wall
Parallel Wall
Figure 12
Figure 13
6
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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.
7
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 ).
Slide the unit through the framed opening with
the face adjacent to the flanges bent fully over
180 degrees, inserted first.
Slide the unit into the prepared framing until the
unit is centered between the walls. Fold the
nailing tabs back against the framing, level the
unit with shims as necessary and secure the
fireplace to the side frame members with 8d
nails or screws as appropriate.
Step 2. Using standard construction framing
techniques, construct opening for chimney route
up through the ceiling(s) and roof or through an
outside chase.
Framing must maintain adequate minimum air
space clearance at all times.
CAUTION: ALLOW MINIMUM 2" (51 MM)
CHIMNEY AIR SPACE TO COMBUSTIBLE
FRAMING MEMBERS THROUGHOUT VERTICAL OR OFFSET CHIMNEY INSTALLATION.
ALSO MAINTAIN AIR SPACE ON TOP OF THE
FIREPLACE AS DEFINED BY THE SPACERS
AND STANDOFFS.
A minimum 2" (51 mm) air space must be
reserved for all materials extending for any
continuous length surrounding the chimney.
Step 3. Position appropriate firestop spacer at
ceiling and nail temporarily with two (2) 8d
nails. Use flat firestop spacer, Model F10FS-2,
if chimney penetrates ceiling vertically. If chimney penetrates ceiling at 30° angle (offset
chimney), use Model F10FS30-2. Nailed, one
each on opposite sides to hold firestop spacer
in position. Nail permanently, using at least
two (2) more 8d nails, after chimney sections
have been assembled through the firestop
spacer and after any necessary adjustments
have been made. Firestop spacer must be
secured by at least four (4) 8d nails when
completely installed.
Note: If there is a room above ceiling level,
firestop spacer must be installed on the bottom
side of the ceiling. If an attic is above ceiling
level, firestop spacer must be installed on top
side of ceiling joist (Figures 20 and 21).
See Figures 26 and 27 and charts “Framing
Dimensions for Ceiling and Roof” on page 10,
which specify minimum ceiling and roof dimensions.
Framing
Stud
Nailing
Flange
Room Above
For new construction, to determine chimney
center line, use plumb line from roof or ceiling
above fireplace to center of flue collar on
fireplace.
For remodeling, plumb to center of flue collar
from ceiling above, drive nail through ceiling
from below to mark position, then mark and
cut to passage from above ceiling (around
nail) (Figure 19 ). Then plumb from ceiling or
roof level directly above hole which has just
been completed.
Firestop Spacer
Figure 20
Attic Above
Firestop Spacer
Figure 18
Plumb Line
Note: The nailing tabs are exempt from the
fireplace clearances described on the fireplace
clearance label.
Step 4. Note: Chimney sections are constructed with a unique locking tab design
which ensures an immediate, tight assembly
between sections. Plan your chimney requirements 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 tabs engage properly.
INSTALLING THE CHIMNEY SYSTEM
Step 1. Check flue damper for proper operation. To open, pull handle down and release.
Damper will open automatically. To close, push
handle up. The damper should lock into the
closed position.
Note: The damper is set to one opening, but
may be switched if necessary.
Figure 21
Figure 19
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
9
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). Check each piece by pulling up
slightly from the top to ensure proper engagement 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 ).
B
2" (51mm) Min. Air Space
to Combustibles
A
Ceiling Framing
Figure 24
Figure 26
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 reinforcement 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 exceed 30' (9.1 m). Chimney heights above 30'
(9.1 m) must be supported by a Model FTF13S4 stabilizer installed at 30' (9.1 m) intervals.
Framing Dimensions for Ceiling
Ceiling Opening
Flue Type
A
B
FTF13, Vertical
at 2" (51 mm)
19"
(483 mm)
19"
(483 mm)
FTF13, Offset
At 2" (51 mm)
19"
(483 mm)
29"
(737 mm)
Note: The Model FTF13-S4 adds 3" (76 mm) net
effective height to the total chimney system.
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 ).
Install the Model FTF13-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 25 ).
Locking Tabs
(Lances)
D
C
Roof Framing
Figure 27
Framing Dimensions for Roof
FTF13 at 2" (51 mm)
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 (Figure
24 ). Always maintain 2" (51 mm) minimum air
space to combustible materials and always
check each pipe joint (inner and outer) to
ensure proper engagement.
10
FTF13-S4 Stabilizer
Figure 25
Note: Do not apply excessive pressure to any
subsequent chimney sections following the
stabilizer when installing. Ensure each subsequent chimney section is securely attached by
testing as noted in Step 4.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Pitch
C
D*
0/12
19"
(483 mm)
19"
(483 mm)
6/12
19"
(483 mm)
20"
(508 mm)
12/12
19"
(483 mm)
27"
(686 mm)
* Perpendicular to Roof Ridge.
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 ). Again, check the vertical
position of the chimney and the 2" (51 mm)
minimum air space to combustibles.
Step 8. The standard Security Chimneys FTF10
roof flashing assembly includes a storm collar.
Slide storm collar over outer chimney, align
with top surface of flashing, insert storm tab in
slot, pull tight and bend tab back over slot. Seal
storm collar to outer chimney with roof caulking or mastic around entire circumference of
pipe. Also add extra roof caulking where storm
collar meets flashing and to the tab/slot area to
seal completely against water penetration (Figure 30 ). Check all joints very carefully to ensure
no water intrusion can take place.
Step 10. Using an FTF13-CTD Round Termination:
1. Hold FTF13-CTD over top of last chimney
section (see Figure 32 ).
2. Center inner slip section in inner flue pipeslip down.
3. Center outer locking section over outer flue
pipe. Push down until locking tabs are firmly
engaged.
4. Pull up slightly on CTD to ensure locking
joint has firmly engaged.
Locking Band
Mastic
20"
(508mm)
Note: Do not caulk or seal the ventilating
openings.
FTF13 Chimney
Do Not Seal
Figure 30
FTF10 Flashing
Figure 28
Step 7. Secure flashing by nailing along the
perimeter into roof using 8d nails. If shingled
roof, slide upper end and sides of roof flashing
under shingles (trim if necessary), seal the top
and both sides of the flashing to the roof with
roof caulking. Cover nail heads with roof caulking (Figure 29 ).
Step 9. Security Chimneys locking band,
Model FLB, may be required if the chimney
extends too high above the roof flashing. As
a general rule, if the chimney extends more
than 6' (1.8 m) above the roof/flashing, the
use of locking bands is advisable to strengthen
the chimney joints. Align the locking band at
the pipe joint. Locking bands wrap around
pipe joints equally covering the joints of both
pipe sections. Use nut provided and TIGHTEN
snugly. Do not over tighten as this might
damage chimney section (Figure 30 ).
Note: If chimney extends more than 8' (2.4 m)
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 31 ). Guy
wires are not supplied by the manufacturer.
Roof Ridge
Figure 29
120°
Figure 31
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 32
Using a FTF13-CTDT Chase Termination:
Refer to specific installation instructions included with the FTF13-CTDT chase termination
for clearance and installation details.
Using a FTF13-CT1 Chase Termination:
Refer to specific installation instructions included with FTF13-CT1 chase terminations for
clearance and installation details.
Using a FTF13-CT2 Chase Termination:
Refer to specific installation instructions included with FTF13-CT2 chase terminations for
clearance and installation details.
Note: It is recommended that all exterior exposed metal fireplace components; such as terminations, flashings, storm collars and/or flue
be painted with a premium quality, high temperature, rust preventative paint designed for
metal. This is especially important when installations are made in abnormally adverse or corrosive environments; such as near lakes, oceans or
in areas with consistently high humidity conditions. Consult the paint manufacturers instructions for proper preparation and application.
11
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.
18"
(457mm)
If the horizontal distance from the peak of the
roof is less then 10' (3 m), the top of the
chimney must be at least 2' (610 mm) above
the peak of the roof.
If the horizontal distance from the chimney
edge to the peak of the roof is more than 10'
(3 m), a chimney height reference point is
established on the roof surface located horizontally 10' (3 m) from the chimney edge. The
top of the chimney must be at least 2' (610
mm) above this reference point. In all cases,
the chimney cannot be less then 3' (914 mm)
above the roof at the edge of the chimney.
The 2' in 10' rule is necessary in the interest of
safety, but does not ensure smoke-free operation. Trees, buildings, adjoining roof lines,
adverse wind conditions, etc., may require a
taller chimney should the fireplace not draft
properly (Refer to Figure 33 ).
MULTIPLE TERMINATIONS
If more than one termination is located in the
same chase or within the same general proximity, we suggest they should be separated in
distance at least 24" (610 mm) horizontally
from flue center to flue center and stacked or
staggered vertically at least 18" (410mm) apart,
from the termination of one smoke exit to the
termination of another smoke exit (Figure 34 ).
12
LS43ST Fireplace
= 58 ¹⁄₂" (1486 mm)
FTF13-12
= 10 ¹⁄₄" (260 mm)
FTF13-18
= 16 ¹⁄₄" (413 mm)
FTF13-36
= 34 ¹⁄₄" (870 mm)
CTD Termination
= 4" (102 mm)
CT1 Termination
= 18" (457 mm)
CT2 Termination
= 15" to 23"
(381 mm – 584 mm)
CTDT Termination = 12" to 18"
(305 mm – 457 mm)
S4 Stabilizer *
= 3" (76 mm)*
* Required for every 30' (9.1 m) of vertical
chimney and 10' of offset chimney.
24"
(610mm)
Figure 34
This suggestion is provided in the interest of
better operation. If the terminations are located
too close to each other, smoke may migrate
from one flue into the other.
FTF13 CHIMNEY COMPONENT
CALCULATIONS
The minimum installed height of the LS43ST
fireplace system (including fireplace and chimney components) is 15' (4.6 m). 22' (5.6m)
with two offsets. The maximum system height
is 80' (24.4 m).
To determine the number of chimney sections
and chimney components required, follow
these steps:
1. Determine total vertical height of the fireplace installation. This dimension is measured
from the surface the fireplace sets on to the
point where smoke exits from the termination.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
4. Determine amount of chimney height required by subtracting total combined height
of all pre-selected components (fireplace
and chimney components from total desired
height.)
Reference Vertical Elevation Chart and determine the number of chimney sections (quantity
and length) required.
SPECIAL OFFSET INSTRUCTIONS
To clear any overhead obstructions, you
may offset your chimney system using
Security's 30° offset and return elbows. Use
two elbows - an offset elbow to initiate the
offset and a return elbow to terminate it. A
30° offset elbow, angling in any direction,
may be the first component used off the top
of the fireplace flue collar.
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
¹⁄₄
¹⁄₂
¹⁄₂
¹⁄₄
¹⁄₂
Feet/Inches
0
1
1
2
2
2
3
3
4
4
5
5
5
6
7
7
7
8
9
9
10
10
11
12
12
13
13
14
15
15
16
16
17
17
18
18
19
20
20
21
21
22
22
23
24
24
25
25
26
27
27
27
28
29
29
30
30
31
32
32
33
33
34
35
35
35
36
37
37
11
5
9
3
9
11
1
7
3
7
1
7
9
7
1
5
11
7
5
11
3
9
5
3
9
2
8
3
2
8
0
6
2
11
6
10
4
0
10
4
8
2
10
8
2
6
0
8
8
0
4
10
6
4
10
3
9
4
3
9
1
7
3
1
7
11
5
1
11
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
¹⁄₄
¹⁄₂
¹⁄₂
¹⁄₄
¹⁄₂
Number Of FTF13
Chimney Lengths
Height Of
Chimney Only
12"
18"
36"
MM
M
1
0
2
1
0
0
2
1
0
2
1
0
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
1
0
1
2
0
1
2
1
0
1
2
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
0
0
0
0
0
1
0
0
1
1
1
1
2
2
2
2
2
3
3
3
3
3
4
4
4
4
4
5
5
5
5
5
6
6
6
6
6
7
7
7
7
7
8
8
8
8
8
9
9
9
9
9
10
10
10
10
10
11
11
11
11
11
12
12
12
12
12
13
13
279
432
540
692
845
889
946
1099
1302
1403
1556
1708
1759
2013
2165
2273
2426
2622
2883
3035
3143
3296
3493
3753
3905
4013
4166
4362
4623
4775
4877
5029
5232
5480
5639
5747
5899
6096
6356
6509
6617
6769
6966
7226
7379
7487
7639
7836
8096
8249
8350
8503
8706
8960
9112
9220
9373
9569
9829
9982
10090
10243
10439
10700
10852
10960
11113
11309
11570
0.28
0.43
0.54
0.69
0.85
0.89
0.95
1.10
1.30
1.40
1.56
1.71
1.76
2.01
2.17
2.27
2.43
2.62
2.88
3.03
3.14
3.30
3.49
3.75
4.91
4.01
4.17
4.36
4.62
4.78
4.88
5.03
5.23
5.48
5.64
5.75
5.90
6.10
6.36
6.51
6.62
6.77
6.97
7.23
7.38
7.49
7.64
7.84
8.10
8.25
8.35
8.50
8.71
8.96
9.11
9.22
9.37
9.57
9.83
9.98
10.09
10.24
10.44
10.70
10.85
10.96
11.11
11.31
11.57
Height Of
Chimney Only
Inches
461
465
471
479
489
495
499
505
513
523
529
534
540
547
558
564
568
574
582
592
598
602
608
616
626
632
636
642
650
660
666
670
676
684
694
700
705
711
718
729
735
739
745
753
763
769
773
779
787
797
803
807
813
821
831
837
841
847
855
865
871
875
881
889
899
905
910
916
924
¹⁄₂
¹⁄₂
¹⁄₂
¹⁄₂
¹⁄₂
¹⁄₂
³⁄₄
³⁄₄
¹⁄₂
³⁄₄
³⁄₄
³⁄₄
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
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
Number Of FTF13
Chimney Lengths
Feet/Inches
38
38
39
39
40
41
41
42
42
43
44
44
45
45
46
47
47
47
48
49
49
50
50
51
52
52
53
53
54
55
55
55
56
57
57
58
58
59
59
60
61
61
62
62
63
64
64
64
65
66
66
67
67
68
69
69
70
70
71
72
72
72
73
74
74
75
75
76
77
5
9
3
11
9
3
7
1
9
7
1
6
0
7
6
0
4
10
6
4
10
2
8
4
2
8
0
6
2
0
6
10
4
0
10
4
9
3
10
9
3
7
1
9
7
1
5
11
7
5
11
3
9
5
3
9
1
7
3
1
6
11
5
1
11
5
10
4
0
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
¹⁄₂
¹⁄₂
¹⁄₂
¹⁄₂
¹⁄₂
¹⁄₂
³⁄₄
³⁄₄
¹⁄₂
³⁄₄
³⁄₄
³⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₂
¹⁄₂
¹⁄₂
¹⁄₂
¹⁄₂
³⁄₄
³⁄₄
¹⁄₂
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
Height Of
Chimney Only
12"
18"
36"
MM
M
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
2
1
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
13
13
13
14
14
14
14
14
15
15
15
15
15
16
16
16
16
16
17
17
17
17
17
18
18
18
18
18
19
19
19
19
19
20
20
20
20
20
21
21
21
21
21
22
22
22
22
22
23
23
23
23
23
24
24
24
24
24
25
25
25
25
25
26
26
26
26
26
27
11722
11824
11976
12179
12433
12586
12694
12846
13043
13303
13456
13564
13716
13913
14173
14326
14434
14586
14783
15043
15196
15297
15450
15653
15907
16059
16167
16320
16516
16777
16929
17037
17189
17386
17647
17799
17907
18059
18256
18517
18669
18771
18923
19126
19380
19533
19641
19793
19990
20250
20403
20511
20663
20860
21120
21273
21380
21533
21730
21990
22142
22244
22396
22600
22854
23006
23114
23266
23470
11.72
11.82
11.98
12.18
12.43
12.59
12.69
12.85
13.04
13.30
13.46
13.56
13.71
13.91
14.17
14.33
14.43
14.59
14.78
15.04
15.20
15.30
15.45
15.65
15.91
16.06
16.17
16.32
16.52
16.78
16.93
17.04
17.19
17.39
17.65
17.80
17.91
18.06
18.26
18.52
18.67
18.77
18.92
19.13
19.38
19.53
19.64
19.79
19.99
20.25
20.40
20.51
20.66
20.86
21.12
21.27
21.38
21.53
21.73
21.99
22.14
22.24
22.40
22.60
22.85
23.01
23.11
23.27
23.47
13
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
0
5
1
2
0
1
2
0
1
0
3
1
2
1
0
1
1
1
0
0
0
0
0
0
1
0
0
1
0
1
1
0
1
1
1
2
1
0
2
1
1
2
2
0
2
2
3
2
2
3
3
3
2
3
3
3
4
3
4
4
102
229
305
362
438
514
533
565
641
667
718
743
794
826
870
921
946
972
997
1054
1099
1130
1149
1175
1226
1257
1302
1378
1403
1435
1511
1588
1664
1721
1772
1797
1873
1924
2026
2057
2102
2229
400
622
756
851
978
1111
1149
1207
1334
1378
1467
1505
1600
1651
1734
1822
1861
1905
1956
2045
2127
2178
2223
2261
2324
2400
2483
2616
2654
2705
2838
2965
3099
3188
3264
3321
3454
3543
3715
3766
3848
4070
4
9
12
14
17
20
21
22
25
26
28
29
31
32
34
36
37
38
39
41
43
44
45
46
48
49
51
54
55
56
59
62
65
67
69
70
73
75
79
81
82
87
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₂
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₂
¹⁄₄
¹⁄₂
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₂
¹⁄₄
¹⁄₄
¹⁄₄
¹⁄₂
¹⁄₂
¹⁄₂
³⁄₄
³⁄₄
³⁄₄
³⁄₄
³⁄₄
³⁄₄
³⁄₄
³⁄₄
³⁄₄
15
24
29
33
38
43
45
47
52
54
57
59
63
65
68
71
73
75
77
80
83
85
87
89
91
94
97
103
104
106
111
116
122
125
128
130
136
139
146
148
151
160
³⁄₄
¹⁄₂
³⁄₄
¹⁄₂
¹⁄₂
³⁄₄
¹⁄₄
¹⁄₂
¹⁄₂
¹⁄₄
³⁄₄
¹⁄₄
¹⁄₄
³⁄₄
¹⁄₄
¹⁄₂
³⁄₄
³⁄₄
¹⁄₂
¹⁄₂
¹⁄₂
³⁄₄
¹⁄₂
¹⁄₂
³⁄₄
³⁄₄
¹⁄₂
¹⁄₂
³⁄₄
¹⁄₂
¹⁄₄
¹⁄₄
¹⁄₂
¹⁄₄
FTF13-E30
Return Elbow*
FTF13 Chimney
Sections
A
B
FTF13-30
Offset Elbow*
58 ¹⁄₂"
(1486 mm)
* Part of Offset/Return Package, Model FTF13-ES30.
Figure 35
A1
A2
A2
20' Max.
(6m)
C2
C2
Stabilizer
B1
A1
A1
10' Max.
(3m)
B1
B1
C1
C1
Figure 36
14
B2
B2
Figure 37
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 38
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.
When two sets of offset elbows are used, the
maximum combined length of chimney used
between elbows cannot exceed 20' (6.1 m)
(see Figures 37 and 38 ). Example: If C1 = 10'
(3m) then C2 cannot exceed 10' (3 m).
If an offset exceeds 6' in length, each chimney
joint beyond the first 6' of offset to the return
elbow, must be secured by a No. 8 x ¹⁄₂" sheet
mental screw located at the underside of the
joint (Figure 39 ).
Sc
Eve rews
ry Re
Joi qu
nt ired
Pa
st at
6'
Joints
Chimney
Section
No
Joi Scre
nts ws
for Re
Fir qui
st red
6'
of in
Off
set
4'
6'
No. 8 x ¹⁄₂" SMS
Figure 39
A ¹⁄₈" (3 mm) diameter hole must be drilled in
the chimney joint using a ¹⁄₈" (3 mm) diameter
drill. Hole should be drilled in center of joint
overlap (Figure 40 ). Be sure to drill only through
the outer chimney casting. Do not puncture the
inner flue.
Maximum offset of the chimney system is 30°.
Two offset elbows must not be assembled to
form a 60° offset. However, two sets of offset
and return elbows may be used on a single flue
system, provided the total height of the system
exceeds 22' (5.6 m).
Return elbow support straps must be securely
attached under tension (in shear) to structural
framing members above.
Offset elbows install the same as chimney
sections. First, snap the inner section INTO the
preceding inner section of flue. Check connection by pulling up slightly to ensure a tight fit.
Next, the outer sections snap locks OVER the
preceding outer section of chimney. Again,
check outer section by pulling up slightly to
ensure proper connection is made.
OFFSET CALCULATIONS
RETURN ELBOW ASSEMBLY
1. Use Offset Chart to determine amount of
horizontal offset (A) and height (B) for various
chimney sections.
Return elbows install the same way as round
terminations and stabilizers:
2. Use “Height of Chimney Only” column to
determine combinations of pipe used above
return elbow to achieve desired heights. Reference Components Effective Height Chart in
vertical elevation chart section.
3. Use Elevation Chart as job estimator only.
Add necessary firestop spacers and stabilizers
as required. Firestop spacers must be used as
shown in Figures 20 and 21 and stabilizers as
shown in Figure 25.
INSTALLING OFFSETS
First, review Offset Elevation Chart and Figure
35 on page 14 for reference.
Step 1. Hold return elbow over top of last
chimney section.
Step 2. Center inner slip section into inner flue
pipe-slip down.
Step 3. Center outer locking section over outer
chimney pipe-push down until locking joint has
firmly engaged.
Step 4. Pull up slightly on return elbow to
ensure locking joint has firmly engaged.
Step 5. Secure support straps to framing
members by nailing under tension in sheer
(Figure 41 ).
Step 1. Determine the offset distance where
chimney is to pass through the first ceilingdimension “A.” To find this point on your ceiling, first determine the center point for a vertical chimney following the instructions for vertical installation.
Return Elbow
Measure height to the ceiling from the top of
fireplace-dimension “B.” Use Offset Elevation
Chart to find dimension “A.” Mark point where
you will drive your nail to show the center point
for your offset ceiling cut.
Step 2. Proceed by using the Straight Up Installation Instructions for cutting and framing ceiling and roof openings.
Underside of Chimney
OFFSET ELBOW ASSEMBLY
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.
Figure 41
Note: The return elbow assembly performs the
same function as a stabilizer. Consider this
when determining the need for a stabilizer.
Note: Do not apply excessive pressure to any
subsequent chimney section following return
elbow assembly when installing. Ensure subsequent chimney sections are securely attached
by testing as noted above.
Figure 40
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
15
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.
Attic Space
F10FS30-2
Firestop
Spacer
2" (51mm)
Min. Air
Space
FTF13-S4
Stabilizer
2" (51mm)
Min. Air
Space
10'
(3m) Max.
30° Firestop
and Attic Above
Figure 42
Room Above
F10FS30-2
Firestop
Spacer
2" (51mm)
Min. Air
Space
CAUTION: REMOVE THE PLASTIC PROTECTIVE COATING FROM THE DOORS BRASS
PIECES BEFORE ASSEMBLY AND INSTALLATION. FAILURE TO REMOVE THE COATING
BEFORE FIRST USE WILL RESULT IN DAMAGE TO THE BRASS FINISH.
Make a careful inspection of all parts before
installing the doors to insure they are undamaged and complete. Always use two (2)
glass door assemblies for each side of the
LS43ST fireplace.
CAUTION: DO NOT TOUCH THE DOORS WITH
YOUR HANDS WHILE THE FIREPLACE IS IN
USE. ALWAYS USE DOOR HANDLES.
DOORS WILL BECOME VERY HOT WHEN
FIREPLACE IS IN USE.
Note: Design characteristics of a dual-opening
fireplace (whether masonry or factory-built)
may cause it to not draft properly and smoke.
For this reason, glass doors are required with
the LS43ST fireplace.
WARNING: THESE FIREPLACES
SHOULD BE OPERATED ONLY WITH
THE DOORS FULLY OPEN OR FULLY
CLOSED ( FIGURES 44 AND 45 ). IF
DOORS ARE LEFT PARTLY OPEN, GAS
AND FLAME MAY BE DRAWN OUT OF
THE FIREPLACE OPENING, CREATING
RISKS OF BOTH FIRE AND SMOKE.
FTF13-S4
Stabilizer
2" (51mm)
Min. Air
Space
10'
(3m) Max.
OPTIONAL EQUIPMENT
Combustion Air Kit
Use combustion air kit, Model FOAK-4 or
FOAK-4LD (Figure 46 ), with these fireplace
systems. Refer to installation instructions
packed with the air kit for specific information.
Outside air drawn into the fireplace supplies air
to the fire for combustion. The outside air kit
must be installed before the fireplace is framed
and enclosed in the finished walls.
IMPORTANT: ALTHOUGH THE COMBUSTION
AIR KIT IS DESIGNATED AS AN OPTIONAL
ACCESSORY IT IS HIGHLY RECOMMENDED
THAT IT BE INSTALLED. DUE TO THE OPERATING CHARACTERISTICS OF MULTI-OPEN
FIREPLACES, A PROPERLY INSTALLED
SOURCE OF OUTSIDE COMBUSTION AIR CAN
ENHANCE THE OPERATING PERFORMANCE
OF THE APPLIANCE. THE COMBUSTION AIR
KIT IS NOT REQUIRED FOR THE SAFE OPERATION OF THE LS43ST.
There is a one-hand operated shut-off valve
located on each side of the fireplace opening
behind the screen. Refer to label for directions
of operation. The combustion air damper
should be fully open when the fireplace is in
operation and fully closed when the fireplace is
not in use to prevent outside air from entering
your home.
If additional length of duct is necessary,
purchase locally available 4 inch diameter
(12.5 in.²) Class 0 or Class 1 ducting. The
duct may extend up to 50' (15.2 m) in any
direction.
Combustion
Air Kit
30° Firestop
and Room Above
Figure 43
GLASS DOORS
The LS43ST fireplace require the use of glass
doors. The selection of glass doors available
for use with these fireplace are: 43LSBF,
43LSBF-B, 43LBF, 43LBF-BB, 43LBF-BS and
43TBA. The use of any other non-listed door
on these fireplaces may result in a potential
fire hazard and is not recommended.
Glass Doors
Fully Open
Figure 44
Figure 46
IMPORTANT: IT IS NECESSARY TO ORDER
AND INSTALL THE DOOR STYLE OF YOUR
CHOICE. GLASS DOORS ARE NOT OPTIONAL.
Glass Doors
Fully Closed
Figure 45
16
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Outside combustion air may be run upwards
or vertically through framing and ceiling joists,
with the hood installed through an outside wall
and 3' (914 mm) below the termination. Ducting may also be run downward through floor
joists and under the home to a ventilated
crawlspace not considered part of the living
area of the home.
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).
GAS LINE INSTALLATION
IMPORTANT: REPACK INSULATION MATERIAL
IN SQUARE HOLE AROUND GAS LINE, INTERIOR AND EXTERIOR, TO SEAL.
This provision is intended for connection to a
decorative gas appliance incorporating an automatic shut-off device and complying with the
Standard for Decorative Gas Appliances for
installation in vented fireplaces, ANSI Z21.60
(1991) or American Gas Association draft requirements for Gas-Fired Log Lighters for Wood
Burning Fireplaces, Draft No. 4 dated August,
1993. Install in accordance with the National
Fuel Gas Code, ANSI Z223.1. This complies
with the revised U.L. 127 standard.
CAUTION: WHEN USING THE DECORATIVE
GAS APPLIANCE, THE FIREPLACE DAMPER
MUST BE SET IN THE FULLY OPEN POSITION.
The LS43ST fireplace has been approved to
accept a ¹⁄₂" (13 mm) gas line for an approved
gas appliance. Always have the appliance installed by a qualified, licensed plumber in accordance with all local building codes. The gas
line may enter either end of the fireplace.
Vent Free Appliances
CAUTION: PLUMBING CONNECTIONS SHOULD
ONLY BE PERFORMED BY A QUALIFIED, LICENSED PLUMBER. MAIN GAS SUPPLY MUST
BE OFF WHEN PLUMBING GAS LINE TO FIREPLACE OR PERFORMING SERVICE.
The unit has been tested for use with any
unvented gas log sets having a maximum rating
of 40,000 BTU. The minimum mantle configurations are outlined in Figure 47.
If you’re installing a gas line, connect it before
the fireplace is framed and enclosed in the
finished wall. The gas knockout is determined
by a 1 ¹⁄₈" (29 mm) round indentation located
at the bottom and slightly off center in the side
refractories. THE KNOCKOUT IS ALWAYS REMOVED FROM INSIDE THE FIREPLACE. DO
NOT REMOVE THE KNOCKOUT UNLESS YOU
ARE INSTALLING A GAS LINE. If removal is
attempted from the outer wrapper, side-refractory damage may occur. With a mediumsized hammer, lightly tap the surface of the
indentation. The refractory material is very
thin in this area and is easily removed. Once a
small hole has been made, continue tapping
until you have reached sufficient diameter for
the gas line to fit through. The entire knockout
does not have to be removed. Remove insulation in the gas line channel.
Install a ¹⁄₂" (13 mm) gas supply line through
fireplace wall for connection to a decorative
gas appliance inside the firebox. Outside, the
gas supply line must connect to a gas shut-off
valve usually recessed flush into the wall or
floor. The valve should be controlled by a
removable valve key for safety.
Always plumb gas line installation per local
codes. Check all connections with soap suds;
leaks will bubble. Never test any gas line connection with a match or open flame.
FIREPLACE FINISHES
Mantels and Trim
It is sometimes best to frame your fireplace
after it is positioned and the chimney is installed. Frame enclosure for chimney and
fireplace with 2 x 4’s (or heavier) lumber.
Note: The header may rest on the two (2) metal
top spacers on top of the unit but the header
must not be notched to fit around the spacers.
In installations, combustible mantels and trim
may be installed 12" (305mm) above the opening as per NFPA 211, Section 7-3.3.3. and
Figure 47. If a mantel is of a noncombustible
material, it is exempt from the requirements as
long as it does not interfere with the operation
of glass doors.
8"
(203 mm)
Max.
These units have been tested and approved to
ANSI/IAS/AGA Z21.11.2 for use with unvented
gas appliances and complies with the standard for Factory-Built fireplaces, UL 127.
Spacer
1 ¹⁄₂"
(38 mm)
Combustible
Mantel
and Trim
False
Header
12"
(305 mm)
Min.
Finished Wall
11 ¹⁄₂"
(292 mm)
These fireplaces have been marked with a
maximum rating of 40,000 BTU to assure that
homeowners do not exceed the allowable limits for all allowed installations of mantles.
Fireplace Opening
Typical Installation
NEVER INSTALL AN UNVENTED GAS LOG
SET WITH A BTU GREATER THAN 40,000.
COLD CLIMATE INSULATION
Figure 47
Hearth Extensions and Wall Shields
If you live in a cold climate, it is especially
important to seal all cracks around the fireplace and wherever cold air could enter the
room with noncombustible material. Surround
material must be caulked where it meets the
black metal facing of the fireplace to avoid
cold air intrusion. Use noncombustible caulking material only on fireplace facing to seal.
Also, the outside air inlet duct should be
wrapped with noncombustible insulation to
minimize the formation of condensation. Do
not place insulation materials directly against
the chimney sections.
A hearth extension must be installed with
all fireplaces. It is to protect the combustible
floor in front of the fireplace from both radiant
heat and sparks. The hearth extension must
extend 12" beyond both sides of the fireplace
opening and 20" beyond the front (see Figure
48 ). Use a hearth extension constructed of a
durable noncombustible material having an
equal or better (lower k value) insulating value
of k = .84 BTU IN/FT2 HR °F or a thermal
resistance that equals or exceeds r = 1.19 HR
°F FT2/BTU IN. With these values, determine
the minimum thickness/material required using the formula and Page 18.
Note: 2" (51 mm) air space must be preserved
for all materials extending for any continuous
length adjacent to the chimney.
Note: Any noncombustible material whose k
value is less than .84 or whose r value is more
than 1.19 is acceptable.
It is especially important to insulate between
the studs of an outside chase cavity and under
the floor if the floor is above ground level. Do
not place insulation directly against the fireplace or chimney system.
If the fireplace is installed on a combustible
floor, use the metal safety strips (provided)
on the floor extending half under the fireplace and half under the hearth extension
(refer to Figures 6 & 7).
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
17
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.
Example: If Micore 160 is to be used for the hearth extension fireplace,
how thick must this material be?
kM = k value per inch of alternate material
rM = r value per inch of alternate material
TM = minimum thickness required for alternate material
TS = standard thickness of the alternate material
Answer - The minimum required thickness of the Micore 160 is .417”,
therefore round up to nearest standard thickness available which is 1/2”.
Listed Material
k (per inch)
Listed Material
.84
KL
1.19
rL
Listed Min.Thickness
1"
TL
** Approved Alternate Materials for Floor/Hearth Protection
AlternativeMaterials
Thermal Values
MinimumThickness
(rounded to nearest 1/8 inch)
k (per inch)
KM
kL = k value per inch of listed material
rL = r value per inch of listed material
TL = minimum thickness of listed material
r (per inch)
r (per inch)
rM
Min. Thickness
TM
Kaowool M Board
.47
2.13
.56" (1/2")
Micore 160™
.35
2.86
.42" (3/8")
.46
2.17
.55" (1/2")
1.92
.52
2.29" (2-1/4")
1.95
.513
2.32" (2-3/8")
U.S. Gypsum
Note: An asterix “*” indicates, it is a value taken from Table 1.
Using the k formula:
Micore 300™
U.S. Gypsum
Durock™ Cement Board
U.S. Gypsum
Minimum
thickness of =
alternate
material (TM)
TM (inches)
=
k-value (per Inch) of
alternate material (kM) x
k-value (per inch)
of listed material (kM)
kM
*.84
x
Specified min.
thickness
of listed
material (TL)
TL
Hardibacker™
Hardibacker 500™
2.30
.435
2.74" (2-3/4")
Cultered Stone Hearthstone™
2.82
.355
3.36" (3-3/8")
Wonderboard
3.23
.31
3.85" (3-7/8")
Super Firetemp M
.61
1.64
.73" (3/4")
.54
1.85
.64" (5/8")
Face brick
9.00
.111
10.71" (10-3/4")
Johns-Manville
TM (inches)
=
.416 (inches) =
.416
x
1"
Super Firetemp L
Johns-Manville
x
1"
Common brick
5.00
.20
5.95" (6")
Answer - The minimum required thickness of the Micore 160 is .417”,
therefore round up to nearest standard thickness available which is 1/2”.
Cement mortar
5.00
.20
5.95" (6")
Ceramic tile
12.5
.08
14.88" (14-7/8")
Using the r formula:
Marble
~11
~.09
13.10" (13-1/8")
Minimum
thickness of
alternate
material
18
*.35
*.84
=
r-value (per Inch)
of listed material
x
r-value (per inch)
of alternate material
Specified min.
thickness
of listed
material
TM (inches)
=
rL
rM
x
TL
TM (inches)
=
*1.19
*2.86
x
1"
.416 (inches) =
.416
x
1"
Table 1
** If the hearth extension material(s) that is intended to be used is NOT listed
on Table 1, the material can still be used if the material(s) is noncombustible.
However, the manufacturer of the material must provide either the listed kvalue per inch or r-value per inch with listed thickness so that the minimum
thickness required for the hearth can be calculated (per instructions on this
Page and/or as specified in the NFI Certification manuals).
Note: Also see NFI (National Fireplace Institute) Certification Manuals showing
other acceptable calculation methods and acceptable alternate materials
which can be used.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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.
to Fireplace Opening
Next, a 3/4" marble slab set in 1/2" mortar covers the brick, “R” for the marble and mortar
becomes:
marble
“R”M = rM x TS = 0.05 x 3/4" = .038
mortar
“R”M = rM x TS = 0.20 x 1/2" = .10
The sum of all “R values” is: .70 + .10 +. 038
+ .10 = .938
This would NOT be an acceptable combination
of material for the hearth extension since the
total calculated “R value” of the materials used
is under the required “R value” of 1.19. An
additional layer of insulating materials must
be used.
Note: Also see NFI Certification Manuals for
expanded explanation on calculating “R values” when multiple materials are used.
C
B
D
C
A
WARNING: THE CRACK BETWEEN THE
FIREPLACE AND THE HEARTH EXTENSION MUST BE SEALED WITH A NONCOMBUSTIBLE MATERIAL.
Figure 49
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
used to determine acceptable combinations of
materials because “R values” are additive where
r and k values are not.
WARNING: WHEN INSTALLING HEARTH
EXTENSION IN FRONT OF THE FIREPLACE, THE FIREPLACE MUST BE RAISED
IF HEIGHT OF HEARTH EXTENSION EXCEEDS 8" ABOVE BOTTOM OF FIREPLACE
(FIGURE 50 ).
Seal all joints between the black facing and
wall surrounds to prevent cold air intrusion.
Use noncombustible caulking material only to
seal the black metal facing to the surround
material on the finished wall. Combustibles
may also project beyond the sides of the
fireplace opening as long as they are kept
within the shaded areas (refer to Figure 5 ).
ACCESSORY PARTS AND COMPONENTS
LIST FOR THE LS43ST
The accessory parts and components shown
on pages 19 and 20 are to be used only with
your LS43ST fireplace system. Separate installation instructions are packaged with all combustion air kits and chimney terminations.
If you encounter any problems or have questions concerning the installation or application
of this system, please contact your distributor.
For the name of your nearest distributor call:
LENNOX HEARTH PRODUCTS
1110 West Taft Avenue
Orange, CA 92865
INSTALLATION COMPONENTS
The following items are available for use in the
installation of this appliance.
“R value” = 1/k = “r” x thickness of material
used
Example: Given that the required “R value”
for a suitable floor protector used must be
equal to or greater than:
8"
(203 mm)
Max.
Outside Combustion Air Kits
(with duct)
81L87
(without duct)
81L88
“R” = rL x TL = 1.19 x 1” = 1.19.”
If it is desired to elevate a marble hearth extension to a level of 5” or more above the floor
surface. What combination of noncombustible
materials can be used to accomplish this?
FOAK
FOAK-LD
Maximum Thickness of Hearth Extension
when Fireplace is on the Floor.
Figure 50
FINISH TO YOUR TASTE
If common brick is used so that the 3 1/2” dimension is the height, “R” for the common
brick becomes:
brick
“R”M = rM x TS = 0.20 x 3 1/2" = .70
There are a wide variety of “finished looks”
for your LS43ST fireplace from formal wall
decor with elaborate mantels to rustic wood
paneling or warm brick facings.
Using 1/2” of mortar to set the brick, “R” for
the mortar is calculated as follows:
mortar
“R”M = rM x TS = 0.20 x 1/2" = .10
Only noncombustible materials like marble,
stone, tile, brick, etc. may overlap the black
front facing, but be careful not to interfere with
the operation of the glass doors.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Combination
Offset/Return Elbow
Model
LS43ST
63L35
Part Number
23M92
FTF13-OR15
Weight
400 lbs.
19
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
63L60
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
The manufacturer 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 HEARTH PRODUCTS
20 P/N 850,004M REV. F 10/2006
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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