LG Electronics Indoor Fireplace LS43ST User 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  
Download from Www.Somanuals.com. All Manuals Search And Download.  
PRECAUTIONS  
INTRODUCTION  
General Information  
CLEARANCES AND HEIGHT  
REQUIREMENTS  
Note: These fireplace systems are not difficult  
to install. However, in the interest of safety, it is  
recommendedthattheinstallerbeaqualifiedor  
certified “tradesman” familiar with commonly  
accepted fireplace installation and safety tech-  
niques as well as prevailing local codes.  
This Signature Series LS43ST is a radiant-  
heat, two-sided fireplace with a variety of  
glass door options. A steel grate is also in-  
cluded 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,firestopspacerandroofflashing(notchase  
flashings) may be placed directly on or against  
normal construction materials.* The chimney  
and fireplace outer wrapper require a mini-  
mum 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.  
The most important areas of concern dealing  
withtheinstallationoffactory-builtfireplacesare  
clearances to combustible materials, proper as-  
sembly of component parts, height of the chim-  
ney system, the proper use of accessories sup-  
plied by the manufacturer and the techniques  
employed in using finishing materials applied to  
the wall surrounding the fireplace, hearth exten-  
sions 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.  
Note: Illustrationsshownreflecttypicalinstal-  
lations with nominal dimensions and are for  
designandframingreferenceonly.Actualinstal-  
lations may vary due to individual design prefer-  
ences.However,alwaysmaintainminimumclear-  
ances to combustible materials and do not vio-  
late any specific installation requirements.  
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.  
These fireplaces have been tested and listed  
by Omni-Test Laboratories (Report No. 116-  
F-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.  
As with all chimney installations, avoid over-  
head 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.  
TYPICAL INSTALLATION  
These fireplace systems are designed for in-  
stallation in accordance with the National Fire  
Protection Standard for chimneys, fireplaces  
and solid fuel burning appliances; NFPA 211  
andinaccordancewithcodessuchastheBOCA  
Basic/National Codes, the Standard Mechani-  
cal Code and the Uniform Building Codes.  
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.  
The local authority having jurisdiction should  
be consulted before installation, to determine if  
any permits need to be obtained.  
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 ).  
Chimney and  
Termination  
WARNING: FAILURE TO USE MANUFAC-  
TUREPROVIDEDPARTS,VARIATIONSIN  
TECHNIQUES AND CONSTRUCTION MA-  
TERIALS OR PRACTICES OTHER THAN  
THOSE DESCRIBED IN THIS MANUAL  
MAY CREATE A FIRE HAZARD AND VOID  
THE LIMITED WARRANTY.  
*Construction Materials:  
• framing materials • paneling  
• particle board  
• dry wall  
• flooring  
• etc.  
• plywood  
The LS43ST system consists of three “sub-  
systems”:  
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
Download from Www.Somanuals.com. All Manuals Search And Download.  
CHIMNEY SYSTEM  
WARNING: DO NOT PACK OR FILL RE-  
QUIRED AIR SPACES WITH INSULATION  
OR OTHER MATERIAL. NO MATERIAL IS  
ALLOWED IN THESE AREAS.  
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 fire-  
places. Do not modify or alter these compo-  
nents as this may cause a potential serious  
hazard and void the Warranty.  
Damper  
Closed  
Damper  
Open  
Note: Do not insulate the chase cavity with  
blown or fill type insulation materials.  
Lintel  
Chimney Height  
Insulate Joists  
Same As Ceiling  
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 sys-  
tem height chart.  
Figure 3  
LOCATION OF FIREPLACE  
Draft Stops  
Firestop  
Carefully select the proper location for heat  
circulation, aesthetics, chimney obstructions  
and clearance to side wall(s). With proper pre-  
planning, a slight adjustment of a few inches  
can save considerable time and expense later  
during construction and assembly.  
Minimum System Height  
Model LS43ST  
Security's  
FTF13  
Vertical Installation  
One Offset  
14' 0" (3.7 m)  
15 ¹⁄₂ 0" (3.9 m)  
22' 0" (5.6 m)  
FTF13  
CTDT  
Termination  
Two Offsets  
Note: Non-  
Combustible  
Chase  
Flashing  
Must Be  
Used To  
Cover  
Chase Enclosure  
Chase  
A chase is a vertical box-like structure con-  
structed to surround the fireplace and chim-  
ney. 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.  
Opening  
Optional  
Insulation  
In Outside  
Walls Of  
Chase  
8'  
ASSEMBLY OUTLINE  
Before You Start  
Level  
Figure 4  
Solid  
Continuous  
Surface  
Carefully consider the position of the fireplace  
opening with respect to the location of adja-  
cent or nearby stairwells, bath or kitchen ex-  
haustfansand/orreturnairregistersforforced  
air furnaces/air conditioners that could cause  
a smoking fireplace condition if the house is  
tightly insulated.  
Check your inventory list to be sure you have all  
the necessary parts supplied in good usable  
condition.Checkalsoforanyconcealeddamage.  
Outside  
Base  
Insulation  
(Thermal Barrier)  
Checktheoperationofthedamper.Thedamper  
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 ex-  
treme range of motion, up and back in the  
closed position. When pulled forward and  
down, the damper is open.  
Figure 2  
This system is intended to be installed in resi-  
dential homes and buildings of conventional  
construction, not in mobile homes.  
WARNING: IF INSULATION IS USED, THE  
FIREPLACE MUST NOT BE PLACED DI-  
RECTLY AGAINST IT. INSULATION OR  
VAPORBARRIERS,IFUSED,MUSTFIRST  
BE COVERED WITH GYPSUM BOARD,  
PLYWOOD,PARTICLEBOARDOROTHER  
MATERIALTOASSUREINSULATIONAND  
VAPOR BARRIERS REMAIN IN PLACE.  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
4
Download from Www.Somanuals.com. All Manuals Search And Download.  
Whenlocatingthefireplace,considerationmust  
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".  
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, ply-  
wood, 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 fram-  
ing or position fireplace in its final position and  
frame later.  
DO NOT permanently place furniture or other  
items such as decorative pillows within 60" of  
the fireplace front face.  
The fireplace may not be recessed into a com-  
bustiblefloor.Maintainthefloortohearthclear-  
ance established by the fireplace lower front  
face.  
Black Portion Of Frame  
Not To Be Covered With  
Combustible Materials  
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.  
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.  
Wall  
Covering  
7”  
30°  
Note: Safety strips are not required when fire-  
place rests on a noncombustible surface.  
4”  
Usually, no special floor support is needed for  
the fireplace, however, to be certain:  
Door  
Opening  
Safe  
Zone  
12”  
Min.  
1. Estimate the total weight of the fireplace  
system including chimney and surround ma-  
terials such as brick, stone, etc., to be in-  
stalled. Shippingweightsforthefireplacemay  
be found on page 20.  
Figure 5  
Hearth  
Hearth  
ASSEMBLY STEPS  
Metal Safety  
Strips  
Extension  
Extension  
2. Measure the square footage of the floor  
space to be occupied by the system, surrounds  
and hearth extensions.  
Note: The following steps represent the normal  
sequence of installation. Each installation is  
unique, however, and might require a different  
sequence.  
Floor  
Floor  
Figure 6  
3.Notethefloorconstruction,i.e.2x6’s,2x8’s  
or 2 x 10’s, single or double joists, type and  
thickness of floor boards.  
1. Position firebox prior to framing or into  
prepared framing.  
4. Use this information and consult your local  
building code to determine if you need addi-  
tional support.  
2. Install the chimney system.  
3. Install optional outside combustion air kit.  
Hearth  
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.  
Hearth  
Metal Safety  
Strips  
Extension  
Extension  
4. Plumb gas line if a decorative gas appliance  
will be used. (Gas connections should only be  
performed by an experienced, licensed/certi-  
fied tradesman).  
Platform  
Floor  
6. Install both door assemblies.  
CLEARANCES  
Figure 7  
7. Complete finish wall material, surround and  
hearth extension to your individual taste.  
Minimum clearance to combustibles for the  
appliance is as follows: sides - 1" (25 mm),  
floor-0"(0mm), adjacentwall-12"(305mm),  
ceiling - 37 ¹⁄₂" (953 mm).  
Note: Install the hearth extension only as illus-  
trated.  
Study the three dimensional illustration (Fig-  
ure 1 ) to get a general idea of each element of  
your fireplace system.  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
5
Download from Www.Somanuals.com. All Manuals Search And Download.  
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 SPAC-  
ERS. THE HEADER MAY BE IN DIRECT CON-  
TACTWITHTHETOPSPACERSBUTMAYNOT  
BE SUPPORTED BY THEM.  
FRAMING WALL VARIATIONS  
As many as six (6) different framed wall con-  
figurations can be constructed to enclose the  
LS43ST fireplace. The following illustrations  
depict these variations of wall enclosures. Sev-  
eral of these designs may incorporate book  
shelves, wood storage boxes, etc.  
Platform  
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  
*
“T” Type Wall  
“L” Type Wall  
Metal  
Safety Strips  
*
2" Min.  
Figure 10  
*
(51 mm)  
No Combustible  
Materials in  
Figure 9  
Shaded Areas  
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.  
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.  
“H” Type Wall  
“Y” Type Wall  
Figure 11  
Step 3. Refer to fireplace drawings and speci-  
fications on pages 7 and 8 for framing dimen-  
sions and details. False header may be posi-  
tioned directly on top of the fireplace spacers  
(see Figures 10, 11 and 12 ).  
No Combustible  
Materials in  
Shaded Areas  
Parallel Wall  
Figure 13  
Figure 12  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
6
Download from Www.Somanuals.com. All Manuals Search And Download.  
FRAMING SPECIFICATIONS  
58 ⁵⁄₈"  
(1490 mm)  
47 ¹⁄₈"  
(1197 mm)  
26 ¹⁄₄"  
(667 mm)  
54 ³⁄₄"  
(1391 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
Download from Www.Somanuals.com. All Manuals Search And Download.  
FIREPLACE SPECIFICATIONS  
27 ⁹⁄₁₆"  
(701 mm)  
52 ¹¹⁄₁₆" (1335 mm)  
58 ¹⁄₂"  
(1486 mm)  
44 ¹⁄₈"  
(1121 mm)  
Outside Air Inlet  
This Side Only  
24 ⁵⁄₈"  
(625 mm)  
47"  
(1194 mm)  
Gas Line Inlet  
20 ¹⁄₁₆"  
(508 mm)  
9 ¹⁄₂"  
(241 mm)  
8 ¹⁄₂"  
(216 mm)  
8"  
(203 mm)  
39 ⁵⁄₁₆" (1002 mm)  
42 ³⁄₄" (1086 mm)  
52 ³⁄₄" (1340 mm)  
Front View  
11 ³⁄₄"  
(298 mm)  
11 ³⁄₄"  
(298 mm)  
End View  
52 ³⁄₄" (1340 mm)  
27 ⁹⁄₁₆"  
(700 mm)  
Top View  
Figure 17  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
8
Download from Www.Somanuals.com. All Manuals Search And Download.  
Step 3. Position appropriate firestop spacer at  
ceiling and nail temporarily with two (2) 8d  
nails. Use flat firestop spacer, Model F10FS-2,  
ifchimneypenetratesceilingvertically.Ifchim-  
ney 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.  
Step 2. Using standard construction framing  
techniques,constructopeningforchimneyroute  
upthroughtheceiling(s)androoforthroughan  
outside chase.  
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 op-  
posite 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.  
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 VERTI-  
CAL OR OFFSET CHIMNEY INSTALLATION.  
ALSO MAINTAIN AIR SPACE ON TOP OF THE  
FIREPLACE AS DEFINED BY THE SPACERS  
AND STANDOFFS.  
Slidetheunitintothepreparedframinguntilthe  
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.  
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).  
A minimum 2" (51 mm) air space must be  
reserved for all materials extending for any  
continuous length surrounding the chimney.  
See Figures 26 and 27 and charts “Framing  
Dimensions for Ceiling and Roof” on page 10,  
which specify minimum ceiling and roof di-  
mensions.  
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.  
Framing  
Stud  
Firestop Spacer  
Figure 20  
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.  
Nailing  
Flange  
Attic Above  
Firestop Spacer  
Figure 18  
Plumb Line  
Figure 21  
Note: The nailing tabs are exempt from the  
fireplace clearances described on the fireplace  
clearance label.  
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 dam-  
aged. Be certain tabs are properly formed to  
ensure tabs engage properly.  
INSTALLING THE CHIMNEY SYSTEM  
Step 1. Check flue damper for proper opera-  
tion. To open, pull handle down and release.  
Damperwillopenautomatically. Toclose, 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 19  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
9
Download from Www.Somanuals.com. All Manuals Search And Download.  
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 ).  
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 rein-  
forcement is not necessary, except in certain  
offset conditions (see to page 16, Figure 47 ).  
Framing Dimensions for Ceiling  
Ceiling Opening  
Flue Type  
A
B
FTF13, Vertical  
at 2" (51 mm)  
19"  
19"  
(483 mm) (483 mm)  
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.  
FTF13, Offset  
At 2" (51 mm)  
19" 29"  
(483 mm) (737 mm)  
Note:TheModelFTF13-S4adds3"(76mm)net  
effective height to the total chimney system.  
Figure 22  
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 ).  
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 ).  
D
C
Roof Framing  
Figure 27  
Locking Tabs  
(Lances)  
Framing Dimensions for Roof  
FTF13 at 2" (51 mm)  
Pitch  
C
D*  
0/12  
6/12  
12/12  
19"  
(483 mm)  
19"  
(483 mm)  
Figure 23  
FTF13-S4 Stabilizer  
19"  
(483 mm)  
20"  
(508 mm)  
Note: Assemble one component of chimney at a  
time (inner section first, then outer section last)  
beforeproceedingwiththenextcompletesection.  
Figure 25  
19"  
(483 mm)  
27"  
(686 mm)  
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.  
* Perpendicular to Roof Ridge.  
Continue to assemble the chimney up through  
framedceilingopening. Assemblejustenough  
to penetrate the roof flashing openings (Figure  
24 ). Alwaysmaintain2"(51mm)minimumair  
space to combustible materials and always  
check each pipe joint (inner and outer) to  
ensure proper engagement.  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
10  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Step 6. Select proper Security Chimneys roof  
flashingbasedonpitchofroof. Usechartbelow  
for selection:  
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 caulk-  
ing 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 (Fig-  
ure30).Checkalljointsverycarefullytoensure  
no water intrusion can take place.  
Step 10. Using an FTF13-CTD Round Ter-  
mination:  
1. Hold FTF13-CTD over top of last chimney  
section (see Figure 32 ).  
Roof Pitch  
FTF10  
F10-F6  
F10-F12  
Flat to 6/12  
6/12 to 12/12  
2. Center inner slip section in inner flue pipe-  
slip down.  
3. Center outer locking section over outer flue  
pipe. Push down until locking tabs are firmly  
engaged.  
Next,slideroofflashingoverextendedchimney  
sectionthatpreviouslyhasbeeninstalledabove  
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.  
4. Pull up slightly on CTD to ensure locking  
joint has firmly engaged.  
Locking Band  
Mastic  
20"  
Note: Do not caulk or seal the ventilating  
openings.  
(508mm)  
FTF13 Chimney  
Do Not Seal  
Figure 30  
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  
useoflockingbandsisadvisabletostrengthen  
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 ).  
FTF10 Flashing  
Figure 32  
Using a FTF13-CTDT Chase Termination:  
Refer to specific installation instructions in-  
cluded with the FTF13-CTDT chase termination  
for clearance and installation details.  
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  
roofcaulking. Covernailheadswithroofcaulk-  
ing (Figure 29 ).  
Using a FTF13-CT1 Chase Termination:  
Refer to specific installation instructions in-  
cluded with FTF13-CT1 chase terminations for  
clearance and installation details.  
Note: If chimney extends more than 8' (2.4 m)  
above roof surface, guy wires are also recom-  
mended. 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.  
Using a FTF13-CT2 Chase Termination:  
Refer to specific installation instructions in-  
cluded with FTF13-CT2 chase terminations for  
clearance and installation details.  
Roof Ridge  
Note: It is recommended that all exterior ex-  
posed metal fireplace components; such as ter-  
minations, flashings, storm collars and/or flue  
be painted with a premium quality, high tem-  
perature, rust preventative paint designed for  
metal. This is especially important when instal-  
lationsaremadeinabnormallyadverseorcorro-  
siveenvironments;suchasnearlakes,oceansor  
in areas with consistently high humidity condi-  
tions. Consult the paint manufacturers instruc-  
tions for proper preparation and application.  
Figure 29  
120°  
Figure 31  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
11  
Download from Www.Somanuals.com. All Manuals Search And Download.  
2. Determine the number of chimney compo-  
nents 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:  
LS43ST Fireplace  
=
58 ¹⁄₂" (1486 mm)  
2' Min.  
(610mm)  
FTF13-12  
FTF13-18  
=
=
10 ¹⁄₄" (260 mm)  
3' Min.  
(916mm)  
16 ¹⁄₄" (413 mm)  
FTF13-36  
=
=
=
=
34 ¹⁄₄" (870 mm)  
4" (102 mm)  
CTD Termination  
CT1 Termination  
CT2 Termination  
Figure 33  
18" (457 mm)  
TEN FOOT RULE SUMMARY  
18"  
15" to 23"  
(457mm)  
(381 mm – 584 mm)  
The minimum chimney height above the roof  
and/ortoadjacentwallsandbuildingsisspeci-  
fied by all major building codes.  
18"  
(457mm)  
CTDT Termination  
=
12" to 18"  
(305 mm – 457 mm)  
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.  
S4 Stabilizer *  
=
3" (76 mm)*  
* Required for every 30' (9.1 m) of vertical  
chimney and 10' of offset chimney.  
24"  
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 hori-  
zontally 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.  
(610mm)  
4. Determine amount of chimney height re-  
quired by subtracting total combined height  
of all pre-selected components (fireplace  
and chimney components from total desired  
height.)  
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.  
Reference Vertical Elevation Chart and deter-  
minethenumberofchimneysections(quantity  
and length) required.  
FTF13 CHIMNEY COMPONENT  
CALCULATIONS  
The 2' in 10' rule is necessary in the interest of  
safety, but does not ensure smoke-free opera-  
tion. Trees, buildings, adjoining roof lines,  
adverse wind conditions, etc., may require a  
taller chimney should the fireplace not draft  
properly (Refer to Figure 33 ).  
SPECIAL OFFSET INSTRUCTIONS  
The minimum installed height of the LS43ST  
fireplace system (including fireplace and chim-  
ney components) is 15' (4.6 m). 22' (5.6m)  
with two offsets. The maximum system height  
is 80' (24.4 m).  
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.  
MULTIPLE TERMINATIONS  
To determine the number of chimney sections  
and chimney components required, follow  
these steps:  
If more than one termination is located in the  
same chase or within the same general prox-  
imity, we suggest they should be separated in  
distance at least 24" (610 mm) horizontally  
from flue center to flue center and stacked or  
staggeredverticallyatleast18"(410mm)apart,  
from the termination of one smoke exit to the  
termination of another smoke exit (Figure 34 ).  
1. Determine total vertical height of the fire-  
place 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.  
12  
Download from Www.Somanuals.com. All Manuals Search And Download.  
FTF13 VERTICAL ELEVATION CHART  
Height Of  
Chimney Only  
Number Of FTF13  
Chimney Lengths  
Height Of  
Chimney Only  
Height Of  
Chimney Only  
Number Of FTF13  
Chimney Lengths  
Height Of  
Chimney Only  
Inches Feet/Inches 12"  
18"  
36"  
MM  
M
Inches Feet/Inches 12"  
18"  
36"  
MM  
M
11  
17  
21 ¹⁄₄  
27 ¹⁄₄  
33 ¹⁄₄  
35  
0
1
1
2
2
2
3
3
4
4
5
5
5
6
7
7
7
8
9
9
11  
5
9 ¹⁄₄  
3 ¹⁄₄  
9 ¹⁄₄  
11  
1 ¹⁄₄  
7 ¹⁄₄  
3 ¹⁄₄  
7 ¹⁄₄  
1 ¹⁄₄  
7 ¹⁄₄  
9 ¹⁄₄  
7 ¹⁄₄  
1 ¹⁄₄  
5 ¹⁄₂  
11 ¹⁄₂  
7 ¹⁄₄  
5 ¹⁄₂  
11 ¹⁄₂  
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
279  
432  
540  
692  
845  
889  
946  
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  
461 ¹⁄₂  
465 ¹⁄₂  
471 ¹⁄₂  
479 ¹⁄₂  
489 ¹⁄₂  
495 ¹⁄₂  
499 ³⁄₄  
505 ³⁄₄  
513 ¹⁄₂  
523 ³⁄₄  
529 ³⁄₄  
534  
38 5 ¹⁄₂  
38 9 ¹⁄₂  
39 3 ¹⁄₂  
39 11 ¹⁄₂  
40 9 ¹⁄₂  
41 3 ¹⁄₂  
41 7 ³⁄₄  
42 1 ³⁄₄  
42 9 ¹⁄₂  
43 7 ³⁄₄  
44 1 ³⁄₄  
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  
37 ¹⁄₄  
43 ¹⁄₄  
51 ¹⁄₄  
55 ¹⁄₄  
61 ¹⁄₄  
67 ¹⁄₄  
69 ¹⁄₄  
79 ¹⁄₄  
85 ¹⁄₄  
89 ¹⁄₂  
95 ¹⁄₂  
103 ¹⁄₄  
113 ¹⁄₂  
119 ¹⁄₂  
123 ³⁄₄  
129 ³⁄₄  
137 ¹⁄₂  
147 ³⁄₄  
153 ³⁄₄  
158  
164  
171 ³⁄₄  
182  
188  
192  
198  
206  
215 ³⁄₄  
222  
226 ¹⁄₄  
232 ¹⁄₄  
240  
250 ¹⁄₄  
256 ¹⁄₄  
260 ¹⁄₂  
266 ¹⁄₂  
274 ¹⁄₄  
284 ¹⁄₂  
290 ¹⁄₂  
294 ³⁄₄  
300 ³⁄₄  
308 ¹⁄₂  
318 ³⁄₄  
324 ³⁄₄  
328 ³⁄₄  
334 ³⁄₄  
342 ³⁄₄  
352 ³⁄₄  
358 ³⁄₄  
363  
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  
44  
45  
6
0
540  
547 ³⁄₄  
558  
45 7 ³⁄₄  
46  
47  
6
0
564  
568 ¹⁄₄  
574 ¹⁄₄  
582  
47 4 ¹⁄₄  
47 10 ¹⁄₄  
48  
6
592 ¹⁄₄  
598 ¹⁄₄  
602 ¹⁄₄  
608 ¹⁄₄  
616 ¹⁄₄  
626 ¹⁄₄  
632 ¹⁄₄  
636 ¹⁄₂  
642 ¹⁄₂  
650 ¹⁄₄  
660 ¹⁄₂  
666 ¹⁄₂  
670 ³⁄₄  
676 ³⁄₄  
684 ¹⁄₂  
694 ³⁄₄  
700 ³⁄₄  
705  
711  
718 ³⁄₄  
729  
735  
739  
745  
753  
763  
769  
49 4 ¹⁄₄  
49 10 ¹⁄₄  
50 2 ¹⁄₄  
50 8 ¹⁄₄  
51 4 ¹⁄₄  
52 2 ¹⁄₄  
52 8 ¹⁄₄  
53 0 ¹⁄₂  
53 6 ¹⁄₂  
54 2 ¹⁄₂  
55 0 ¹⁄₂  
55 6 ¹⁄₂  
55 10 ³⁄₄  
56 4 ³⁄₄  
57 0 ¹⁄₂  
57 10 ³⁄₄  
58 4 ³⁄₄  
10 3 ³⁄₄  
10 9 ³⁄₄  
11 5 ¹⁄₂  
12 3 ³⁄₄  
12 9 ³⁄₄  
13  
13  
2
8
14 3 ³⁄₄  
15  
15  
16  
16  
17  
2
8
0
6
2
17 11 ³⁄₄  
18  
18 10 ¹⁄₄  
19 4 ¹⁄₄  
20  
6
58  
59  
9
3
0
20 10 ¹⁄₄  
21 4 ¹⁄₄  
21 8 ¹⁄₂  
22 2 ¹⁄₂  
22 10 ¹⁄₄  
23 8 ¹⁄₂  
24 2 ¹⁄₂  
24 6 ³⁄₄  
25 0 ³⁄₄  
25 8 ¹⁄₂  
26 8 ³⁄₄  
27 0 ³⁄₄  
27 4 ³⁄₄  
27 10 ³⁄₄  
28 6 ³⁄₄  
29 4 ³⁄₄  
29 10 ³⁄₄  
59 10 ³⁄₄  
60  
61  
61  
62  
62  
63  
64  
9
3
7
1
9
7
1
773 ¹⁄₄  
779 ¹⁄₄  
787  
64 5 ¹⁄₄  
64 11 ¹⁄₄  
9
9
9
9
65  
7
797 ¹⁄₄  
803 ¹⁄₄  
807 ¹⁄₂  
813 ¹⁄₂  
821 ¹⁄₄  
831 ¹⁄₂  
837 ¹⁄₂  
841 ³⁄₄  
847 ³⁄₄  
855 ¹⁄₂  
865 ³⁄₄  
871 ³⁄₄  
875 ³⁄₄  
881 ³⁄₄  
889 ³⁄₄  
899 ³⁄₄  
905 ³⁄₄  
910  
66 5 ¹⁄₄  
66 11 ¹⁄₄  
67 3 ¹⁄₂  
67 9 ¹⁄₂  
68 5 ¹⁄₄  
69 3 ¹⁄₂  
69 9 ¹⁄₂  
70 1 ³⁄₄  
70 7 ³⁄₄  
71 3 ¹⁄₂  
72 1 ³⁄₄  
72 6 ³⁄₄  
72 11 ³⁄₄  
73 5 ³⁄₄  
74 1 ³⁄₄  
74 11 ³⁄₄  
75 5 ³⁄₄  
75 10  
10  
10  
10  
10  
10  
11  
11  
11  
11  
11  
12  
12  
12  
12  
12  
13  
13  
30  
30  
3
9
369  
376 ³⁄₄  
387  
31 4 ³⁄₄  
32  
32  
33 1 ¹⁄₄  
33 7 ¹⁄₄  
3
9
393  
397 ¹⁄₄  
403 ¹⁄₄  
411  
421 ¹⁄₄  
427 ¹⁄₄  
431 ¹⁄₂  
437 ¹⁄₂  
445 ¹⁄₄  
455 ¹⁄₂  
34  
3
35 1 ¹⁄₄  
35 7 ¹⁄₄  
35 11 ¹⁄₂  
36 5 ¹⁄₂  
37 1 ¹⁄₄  
37 11 ¹⁄₂  
916  
924  
76  
77  
4
0
13  
Download from Www.Somanuals.com. All Manuals Search And Download.  
FTF13 OFFSET ELEVATION CHART  
A
B
FTF13-ES30  
Offset/Return FTF13-S4  
Number of FTF13  
Chimney Sections  
A
B
Offset  
Height  
Offset  
Height  
(Inches) (Inches)  
Elbow Set  
Stabilizer  
12"  
18"  
36"  
(mm)  
(mm)  
4
9
12  
14 ¹⁄₄  
17 ¹⁄₄  
20 ¹⁄₄  
21  
15 ³⁄₄  
24 ¹⁄₂  
29 ³⁄₄  
33 ¹⁄₂  
38 ¹⁄₂  
43 ³⁄₄  
45 ¹⁄₄  
47 ¹⁄₂  
52 ¹⁄₂  
54 ¹⁄₄  
57 ³⁄₄  
59 ¹⁄₄  
63  
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  
400  
622  
756  
851  
978  
FTF13-E30  
Return Elbow*  
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  
FTF13 Chimney  
Sections  
22 ¹⁄₄  
25 ¹⁄₄  
26 ¹⁄₄  
28 ¹⁄₄  
29 ¹⁄₄  
31 ¹⁄₄  
32 ¹⁄₂  
34 ¹⁄₄  
36 ¹⁄₄  
37 ¹⁄₄  
38 ¹⁄₄  
39 ¹⁄₄  
41 ¹⁄₂  
43 ¹⁄₄  
44 ¹⁄₂  
45 ¹⁄₄  
46 ¹⁄₄  
48 ¹⁄₄  
49 ¹⁄₂  
51 ¹⁄₄  
54 ¹⁄₄  
55 ¹⁄₄  
56 ¹⁄₂  
59 ¹⁄₂  
62 ¹⁄₂  
65 ³⁄₄  
67 ³⁄₄  
69 ³⁄₄  
70 ³⁄₄  
73 ³⁄₄  
75 ³⁄₄  
79 ³⁄₄  
81  
A
B
FTF13-30  
Offset Elbow*  
65  
68 ¹⁄₄  
71 ³⁄₄  
73 ¹⁄₄  
75  
972  
997  
77  
80 ¹⁄₂  
83 ³⁄₄  
85 ³⁄₄  
87 ¹⁄₂  
89  
91 ¹⁄₂  
94 ¹⁄₂  
97 ³⁄₄  
1054  
1099  
1130  
1149  
1175  
1226  
1257  
1302  
1378  
1403  
1435  
1511  
1588  
1664  
1721  
1772  
1797  
1873  
1924  
2026  
2057  
2102  
2229  
58 ¹⁄₂"  
(1486 mm)  
103  
104 ¹⁄₂  
106 ¹⁄₂  
111 ³⁄₄  
116 ³⁄₄  
122  
125 ¹⁄₂  
128 ¹⁄₂  
130 ³⁄₄  
136  
139 ¹⁄₂  
146 ¹⁄₄  
148 ¹⁄₄  
151 ¹⁄₂  
160 ¹⁄₄  
* Part of Offset/Return Package, Model FTF13-ES30.  
Figure 35  
82 ³⁄₄  
87 ³⁄₄  
A1  
A2  
A2  
C2  
C2  
20' Max.  
(6m)  
Stabilizer  
B2  
B2  
B1  
A1  
A1  
10' Max.  
(3m)  
B1  
B1  
C1  
C1  
Figure 36  
Figure 37  
Figure 38  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
14  
Download from Www.Somanuals.com. All Manuals Search And Download.  
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).  
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).  
OFFSET ELBOW ASSEMBLY  
Offset elbows install the same as chimney  
sections. First, snap the inner section INTO the  
preceding inner section of flue. Check connec-  
tion 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.  
Return elbow support straps must be securely  
attached under tension (in shear) to structural  
framing members above.  
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:  
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 ).  
Step 1. Hold return elbow over top of last  
chimney section.  
2. Use “Height of Chimney Only” column to  
determine combinations of pipe used above  
return elbow to achieve desired heights. Refer-  
ence Components Effective Height Chart in  
vertical elevation chart section.  
Step 2. Center inner slip section into inner flue  
pipe-slip down.  
Step 3. Center outer locking section over outer  
chimneypipe-pushdownuntillockingjointhas  
firmly engaged.  
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.  
Joints  
Step 4. Pull up slightly on return elbow to  
ensure locking joint has firmly engaged.  
Chimney  
Section  
4'  
INSTALLING OFFSETS  
Step 5. Secure support straps to framing  
members by nailing under tension in sheer  
(Figure 41 ).  
No. 8 x ¹⁄₂" SMS  
First, review Offset Elevation Chart and Figure  
35 on page 14 for reference.  
6'  
Step 1. Determine the offset distance where  
chimney is to pass through the first ceiling-  
dimension “A.” To find this point on your ceil-  
ing, first determine the center point for a verti-  
cal chimney following the instructions for ver-  
tical installation.  
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(Figure40).Besuretodrillonlythrough  
the outer chimney casting. Do not puncture the  
inner flue.  
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.  
Figure 41  
Note: The return elbow assembly performs the  
same function as a stabilizer. Consider this  
when determining the need for a stabilizer.  
Step2.ProceedbyusingtheStraightUpInstal-  
lation Instructions for cutting and framing ceil-  
ing and roof openings.  
Note: Do not apply excessive pressure to any  
subsequent chimney section following return  
elbow assembly when installing. Ensure sub-  
sequentchimneysectionsaresecurelyattached  
by testing as noted above.  
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.  
Underside of Chimney  
Figure 40  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
15  
Download from Www.Somanuals.com. All Manuals Search And Download.  
CAUTION: REMOVE THE PLASTIC PROTEC-  
TIVE COATING FROM THE DOORS BRASS  
PIECES BEFORE ASSEMBLY AND INSTALLA-  
TION. FAILURE TO REMOVE THE COATING  
BEFORE FIRST USE WILL RESULT IN DAM-  
AGE TO THE BRASS FINISH.  
CHIMNEY OFFSET 30° THROUGH FLOOR  
OPTIONAL EQUIPMENT  
Combustion Air Kit  
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.  
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.  
Make a careful inspection of all parts before  
installing the doors to insure they are un-  
damaged and complete. Always use two (2)  
glass door assemblies for each side of the  
LS43ST fireplace.  
Support the chimney at floor or ceiling pen-  
etration 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.  
IMPORTANT: ALTHOUGH THE COMBUSTION  
AIR KIT IS DESIGNATED AS AN OPTIONAL  
ACCESSORY IT IS HIGHLY RECOMMENDED  
THAT IT BE INSTALLED. DUE TO THE OPER-  
ATING CHARACTERISTICS OF MULTI-OPEN  
FIREPLACES, A PROPERLY INSTALLED  
SOURCEOFOUTSIDECOMBUSTIONAIRCAN  
ENHANCE THE OPERATING PERFORMANCE  
OF THE APPLIANCE. THE COMBUSTION AIR  
KIT IS NOT REQUIRED FOR THE SAFE OP-  
ERATION OF THE LS43ST.  
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.  
Attic Space  
F10FS30-2  
2" (51mm)  
Firestop  
Min. Air  
Spacer  
Note: Designcharacteristicsofadual-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.  
Space  
FTF13-S4  
Stabilizer  
2" (51mm)  
Min. Air  
Space  
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  
operationandfullyclosedwhenthefireplaceis  
not in use to prevent outside air from entering  
your home.  
10'  
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.  
(3m) Max.  
30° Firestop  
and Attic Above  
Figure 42  
Room Above  
F10FS30-2  
2" (51mm)  
Min. Air  
Space  
Firestop  
Spacer  
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.  
FTF13-S4  
Stabilizer  
2" (51mm)  
Min. Air  
Space  
10'  
Combustion  
Air Kit  
30° Firestop  
and Room Above  
(3m) Max.  
Figure 43  
GLASS DOORS  
Glass Doors  
Fully Open  
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.  
Figure 44  
Figure 46  
Outside combustion air may be run upwards  
orverticallythroughframingandceilingjoists,  
with the hood installed through an outside wall  
and 3' (914 mm) below the termination. Duct-  
ing 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.  
IMPORTANT: IT IS NECESSARY TO ORDER  
AND INSTALL THE DOOR STYLE OF YOUR  
CHOICE.GLASSDOORSARENOTOPTIONAL.  
Glass Doors  
Fully Closed  
Figure 45  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
16  
Download from Www.Somanuals.com. All Manuals Search And Download.  
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 APPLI-  
ANCE OR PRODUCTS EMITTING COMBUS-  
TIBLE GASES SUCH AS PAINT, GASOLINE,  
ETC. IN COLD CLIMATES, IT IS RECOM-  
MENDED THAT THE COMBUSTION AIR DUCT  
BE INSULATED.  
IMPORTANT:REPACKINSULATIONMATERIAL  
IN SQUARE HOLE AROUND GAS LINE, INTE-  
RIOR AND EXTERIOR, TO SEAL.  
FIREPLACE FINISHES  
Mantels and Trim  
It is sometimes best to frame your fireplace  
after it is positioned and the chimney is in-  
stalled. Frame enclosure for chimney and  
fireplace with 2 x 4’s (or heavier) lumber.  
This provision is intended for connection to a  
decorative gas appliance incorporating an au-  
tomatic 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 re-  
quirementsforGas-FiredLogLightersforWood  
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.  
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.  
Note: Do not terminate combustion air kit in  
attic space under any circumstances.  
In installations, combustible mantels and trim  
may be installed 12" (305mm) above the open-  
ing 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.  
CAUTION:INNOEVENTMAYTHETOTALDUCT  
FOR BRINGING IN OUTSIDE AIR EXCEED 50'  
(15.2 M).  
CAUTION: WHEN USING THE DECORATIVE  
GAS APPLIANCE, THE FIREPLACE DAMPER  
MUST BE SET IN THE FULLY OPEN POSITION.  
GAS LINE INSTALLATION  
Vent Free Appliances  
The LS43ST fireplace has been approved to  
accept a ¹⁄₂" (13 mm) gas line for an approved  
gas appliance. Always have the appliance in-  
stalled by a qualified, licensed plumber in ac-  
cordance with all local building codes. The gas  
line may enter either end of the fireplace.  
8"  
Spacer  
(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 stan-  
dard for Factory-Built fireplaces, UL 127.  
1 ¹⁄₂"  
(38 mm)  
False  
Header  
The unit has been tested for use with any  
unventedgaslogsetshavingamaximumrating  
of 40,000 BTU. The minimum mantle configu-  
rations are outlined in Figure 47.  
Combustible  
Mantel  
CAUTION:PLUMBINGCONNECTIONSSHOULD  
ONLY BE PERFORMED BY A QUALIFIED, LI-  
CENSEDPLUMBER.MAINGASSUPPLYMUST  
BE OFF WHEN PLUMBING GAS LINE TO FIRE-  
PLACE OR PERFORMING SERVICE.  
12"  
and Trim  
(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 lim-  
its for all allowed installations of mantles.  
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 RE-  
MOVED 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-re-  
fractory damage may occur. With a medium-  
sized 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 insula-  
tion in the gas line channel.  
Fireplace Opening  
Typical Installation  
NEVER INSTALL AN UNVENTED GAS LOG  
SET WITH A BTU GREATER THAN 40,000.  
Figure 47  
Hearth Extensions and Wall Shields  
COLD CLIMATE INSULATION  
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 us-  
ing the formula and Page 18.  
If you live in a cold climate, it is especially  
important to seal all cracks around the fire-  
place and wherever cold air could enter the  
roomwithnoncombustiblematerial.Surround  
material must be caulked where it meets the  
black metal facing of the fireplace to avoid  
cold air intrusion. Use noncombustible caulk-  
ing 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.  
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.  
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 fire-  
place 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 fire-  
place and half under the hearth extension  
(refer to Figures 6 & 7).  
Always plumb gas line installation per local  
codes. Check all connections with soap suds;  
leaks will bubble. Never test any gas line con-  
nection with a match or open flame.  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
17  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Hearth Extension Dimensions  
A
B
C
D
20"  
39-3/8"  
12"  
63-3/8"  
C
C
B
D
Note: To convert inches to millimeters  
divide by 0.03937  
A
Figure 48  
Answer - The minimum required thickness of the Micore 160 is .417”,  
therefore round up to nearest standard thickness available which is 1/2”.  
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.  
Listed Material  
k (per inch) r (per inch)  
Listed Min.Thickness  
Example: If Micore 160 is to be used for the hearth extension fireplace,  
how thick must this material be?  
Listed Material  
.84  
1.19  
rL  
1
"
KL  
TL  
kM = k value per inch of alternate material  
** Approved Alternate Materials for Floor/Hearth Protection  
rM = r value per inch of alternate material  
TM = minimum thickness required for alternate material  
TS = standard thickness of the alternate material  
AlternativeMaterials  
Thermal Values  
MinimumThickness  
(rounded to nearest 1/8 inch)  
k (per inch) r (per inch)  
Min. Thickness  
KM  
rM  
TM  
kL = k value per inch of listed material  
rL = r value per inch of listed material  
TL = minimum thickness of listed material  
Kaowool M Board  
.47  
.35  
2.13  
2.86  
.56" (1/2")  
.42" (3/8")  
Micore 160™  
U.S. Gypsum  
Micore 300™  
U.S. Gypsum  
.46  
2.17  
.52  
.55" (1/2")  
Note: An asterix “*” indicates, it is a value taken from Table 1.  
Using the k formula:  
Durock™ Cement Board  
U.S. Gypsum  
1.92  
2.29" (2-1/4")  
Minimum  
thickness of  
alternate  
k-value (per Inch) of  
alternate material (kM) x  
k-value (per inch)  
Specified min.  
thickness  
of listed  
Hardibacker™  
1.95  
2.30  
2.82  
.513  
.435  
.355  
2.32" (2-3/8")  
2.74" (2-3/4")  
3.36" (3-3/8")  
=
Hardibacker 500™  
material (TM)  
of listed material (kM)  
material (TL)  
Cultered Stone Hearth-  
stone™  
TM (inches)  
=
=
kM  
*.84  
x
TL  
Wonderboard  
3.23  
.61  
.31  
3.85" (3-7/8")  
.73" (3/4")  
Super Firetemp M  
Johns-Manville  
1.64  
TM (inches)  
*.35  
*.84  
x
x
1"  
1"  
Super Firetemp L  
Johns-Manville  
.54  
1.85  
.64" (5/8")  
Face brick  
9.00  
5.00  
5.00  
12.5  
~11  
.111  
.20  
10.71" (10-3/4")  
5.95" (6")  
.416 (inches) =  
.416  
Common brick  
Cement mortar  
Ceramic tile  
Marble  
.20  
5.95" (6")  
Answer - The minimum required thickness of the Micore 160 is .417”,  
thereforerounduptoneareststandardthicknessavailablewhichis1/2”.  
.08  
14.88" (14-7/8")  
13.10" (13-1/8")  
~.09  
Using the r formula:  
Table 1  
Minimum  
thickness of  
alternate  
material  
r-value (per Inch)  
of listed material  
r-value (per inch)  
of alternate material  
Specified min.  
thickness  
of listed  
=
x
** 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 k-  
value 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).  
material  
TM (inches)  
TM (inches)  
=
=
rL  
rM  
x
x
x
TL  
1"  
1"  
Note:AlsoseeNFI(NationalFireplaceInstitute)CertificationManualsshowing  
other acceptable calculation methods and acceptable alternate materials  
which can be used.  
*1.19  
*2.86  
.416 (inches) =  
.416  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
18  
Download from Www.Somanuals.com. All Manuals Search And Download.  
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.  
Next, a 3/4" marble slab set in 1/2" mortar cov-  
ers the brick, “R” for the marble and mortar  
becomes:  
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 ).  
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  
ACCESSORY PARTS AND COMPONENTS  
LIST FOR THE LS43ST  
If fireplace is installed diagonally across a 90°  
corner; no wall shields are required.  
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.  
The accessory parts and components shown  
on pages 19 and 20 are to be used only with  
your LS43ST fireplace system. Separate instal-  
lation instructions are packaged with all com-  
bustion air kits and chimney terminations.  
Side Wall  
12" (305 mm) Min.  
to Fireplace Opening  
Note: Also see NFI Certification Manuals for  
expanded explanation on calculating “R val-  
ues” when multiple materials are used.  
If you encounter any problems or have ques-  
tions concerning the installation or application  
of this system, please contact your distributor.  
For the name of your nearest distributor call:  
WARNING: THE CRACK BETWEEN THE  
FIREPLACE AND THE HEARTH EXTEN-  
SION MUST BE SEALED WITH A NON-  
COMBUSTIBLE MATERIAL.  
C
LENNOX HEARTH PRODUCTS  
1110 West Taft Avenue  
Orange, CA 92865  
B
D
A
C
Figure 49  
INSTALLATION COMPONENTS  
WARNING: WHEN INSTALLING HEARTH  
EXTENSION IN FRONT OF THE FIRE-  
PLACE,THEFIREPLACEMUSTBERAISED  
IF HEIGHT OF HEARTH EXTENSION EX-  
CEEDS8"ABOVEBOTTOMOFFIREPLACE  
(FIGURE 50 ).  
Calculating Minimum Thickness if Multiple  
Materials are Used  
The following items are available for use in the  
installation of this appliance.  
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  
materialsbecauseRvaluesareadditivewhere  
r and k values are not.  
“R value” = 1/k = “r” x thickness of material  
used  
8"  
Example: Given that the required “R value”  
for a suitable floor protector used must be  
equal to or greater than:  
(203 mm)  
Max.  
Outside Combustion Air Kits  
(with duct)  
81L87  
81L88  
FOAK  
FOAK-LD  
“R” = rL x TL = 1.19 x 1” = 1.19.”  
(without duct)  
Maximum Thickness of Hearth Extension  
when Fireplace is on the Floor.  
If it is desired to elevate a marble hearth ex-  
tension to a level of 5” or more above the floor  
surface. What combination of noncombustible  
materials can be used to accomplish this?  
Figure 50  
FINISH TO YOUR TASTE  
If common brick is used so that the 3 1/2” di-  
mension is the height, “R” for the common  
brick becomes:  
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.  
brick  
“R”M = rM x TS = 0.20 x 3 1/2" = .70  
Combination  
Offset/Return Elbow  
63L35  
FTF13-OR15  
Using 1/2” of mortar to set the brick, “R” for  
the mortar is calculated as follows:  
mortar  
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.  
Model  
LS43ST  
Part Number  
Weight  
400 lbs.  
“R”M = rM x TS = 0.20 x 1/2" = .10  
23M92  
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.  
19  
Download from Www.Somanuals.com. All Manuals Search And Download.  
INSTALLATION COMPONENTS  
63L19  
63L20  
63L21  
FTF13-12  
FTF13-18  
FTF13-36  
Chase Termination  
(Square)  
Chase Termination  
(Round)  
63L54  
FTF13-CT2  
Chimney Section  
63L44  
FTF13-CTD  
Chase Termination  
(Round)  
Chase Termination  
(Square)  
Offset/ Return  
Package (30°)  
63L47  
FTF13-CTDT  
63L50  
FTF13-CT1  
63L24  
FTF13-ES30  
63L40  
63L41  
F10F6  
F10F12  
Firestop Spacer (Flat)  
63L36  
F10FS-2  
Storm Collar  
63L59  
FSC  
Flashing  
Firestop Spacer (30°)  
63L37  
F10FS30-2  
Locking Band  
63L60  
FLB  
Stabilizer  
63L27  
FTF13-S4  
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  
1110 West Taft Avenue  
Orange, CA 92865  
P/N 850,004M REV. F 10/2006  
Download from Www.Somanuals.com. All Manuals Search And Download.  

La Crosse Technology Clock 519 1416 User Manual
LG Electronics Lawn Mower 29UB65 User Manual
Liebert Refrigerator 1800 User Manual
Linear Security Camera D5 User Manual
Marantz Home Theater System MS308 User Manual
Marmitek Network Router GIGAVIDEO80 User Manual
Martin Audio Portable Speaker S15+ User Manual
Melissa Beverage Dispenser 758039 User Manual
Melissa Mixer 646 059 User Manual
Micro Innovations Switch USB710P User Manual