INSTALLATION
INSTRUCTIONS
WOOD BURNING FIREPLACES
MODELS BC36MH & BCD36MH
36" Wood Burning Fireplaces
P/N 700,034M REV. A 03/2006
MODELS
BC36MH
BCD36MH
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
WH Report No.
J99025865A
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Theminimuminstalledheightofthecompleted
fireplacesystemis10'6". Themaximumheight
is 40' 0". See the Chimney Height section on
Page 3 for more information.
INTRODUCTION
WARNING
General Information
Failure to use manufacture
provided parts, variations in
techniques and construction
materialsorpracticesotherthan
those described in this manual
maycreateafirehazardandvoid
the limited warranty.
These fireplaces are conventional heat circulat-
ing appliances with standard grates, outside
combustion air kit and standard decorative
glass doors. The BCD36MH model is fitted
with a blower and is available as an option for
model BC36MH.
The fireplace and chimney system must be
enclosed when installed in or passing through
alivingareawherecombustiblesorpeoplemay
comeincontactwithit.Thisisimportanttopre-
vent possible personal injury or fire hazard.
Thegrateincludedproperlypositionsthefireand
limits the amount of fuel. IF A REPLACEMENT
GRATEISNEEDEDREPLACETHEGRATEWITH
MODEL 87L20 ONLY.
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 16 and 17).
WARNING
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.
CHIMNEY SYSTEM
Do not pack or fill required air
spaces with insulation or other
material.Nomaterialisallowed
in these areas. Secure the
airspace around the chimney
with the firestop/thimble before
completing the installation.
Maintain 1" clearance between
chimney and thimble.
Thesefireplacesaredesignedandcodelistedfor
usewithSecurityChimneysFTF8chimneysys-
tem only. Always use Security Chimneys FTF8
chimney components with these fireplaces. Do
not modify or alter these components as this
may cause a potential serious hazard and void
the Warranty.
These fireplaces have been tested and listed
by Warnock Hersey (Report No. J99025865A)
to U.L. standard 127. These units are intended
for installation in manufactured homes. These
units may also be installed in buildings of con-
ventional construction including commercial,
providing all instructions provided herein are
strictly adhered to.
*Construction Materials:
• Framing Materials • Paneling
• Particle Board
• Dry Wall
• Flooring
• Plywood
WARNING
• Noncombustible Insulating Materials
• Etc.
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-
latest edition and in accordance with codes
such as the BOCA Basic/National Codes, the
Standard Mechanical Code and the Uniform
Building Codes.
Ifinsulationisused,thefireplace
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
materialtoassureinsulationand
vapor barriers remain in place.
Chimney Height
The total height of your completed fireplace
systemfromthesurfacethefireplacerestsonto
the chimney top must not exceed 40' and must
alsomeetminimumheightrequirements.Refer
to the minimum system height chart.
TYPICAL
INSTALLATION
Minimum System Height
Security's FTF8 Pipe
When complete these fireplace systems con-
sists of four basic “sub-systems”:
1. The Fireplace
Vertical Installation
One Offsets
10' 6"
12' 0"
25' 0"
2. The Chimney and Termination
3. Glass Doors
Two Offsets
4. Combustion Air Kit
Table 1
CLEARANCES AND HEIGHT
REQUIREMENTS
Chimney and
Termination
Firestop
Thimble
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
1" air space to insulation and building materi-
als. A combustible mantel may be installed 12"
above the opening of the fireplace as per NFPA
211-latest edition.
Figure 1
Outside Combustion Air Kit
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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Insulate Joists
WARNING
Same As Ceiling
Do not obstruct the collar open-
ingsaroundthebaseofthechim-
ney at the top of the fireplace.
Do not insulate the chimney
enclosure cavity with blown or
fill type insulation materials.
Hearth
Draft Stops
Firestop
Hearth
CTDT
ASSEMBLY OUTLINE
Before You Start
Figure 4
Termination
Note: Non-
Combustible
Chase
Check your inventory list to be sure you have
all the necessary parts supplied in good us-
able condition. Check also for any concealed
damage.
WARNING
Flashing
Must Be
Used To
Cover
This fireplace and chimney
system is not approved for use
in a bedroom or any room used
for sleeping.
Chase
Opening
Checktheoperationofthedamper. Thedamper
is controlled through the use of a control lever
located within the firebox opening at the top
center in front of the firebox lintel (Figure 3).
The control lever snaps into place at either
extreme of its range of motion. When locked
in position all the way to the right, the damper
is open. When locked in position all the way to
the left, the damper is closed.
Optional
Insulation
In Outside
Walls Of
Chase
Carefully consider the position of the fireplace
opening with respect to the location of adjacent
or nearby stairwells, bath or kitchen exhaust fans
and/orreturnairregistersforforcedairfurnaces/air
conditionersthatcouldcauseasmokingfireplace
condition if the house is tightly insulated.
8'
Level
Solid
Continuous
Surface
Whenlocatingthefireplace,considerationmust
begiventocombustiblesandfinalfinishing. See
Figure 5 and confine the final location of com-
bustible finish materials to the "Safe Zone".
Outside
Base
Insulation
(Thermal Barrier)
Figure 2
Damper
Open
Damper
Closed
DO NOT permanently place furniture or other
items such as decorative pillows within 60" of
the fireplace front face.
Lintel
Chimney Enclosure
Combustion
Air Actuator
Constructabox-likeframedstructuretoenclose
the fireplace and chimney within the confines
of the manufactured home, not necessarily
above the roof line.
Black Portion Of Frame
Not To Be Covered With
Combustible Materials
Figure 3
Aswithallchimneyinstallations,avoidoverhead
obstructions such as trees, power lines, etc.
The chimney/fireplace enclosure should be
constructed and insulated just like any outside
wall. In a cold climate, we recommend the base
of the chimney/fireplace enclosure should also
beinsulatedbetweenthesolidcontinuousfloor
beneath the fireplace and the chase bottom.
Insulation in a cold climate installation is not
required for safety.
Wall
Covering
12”
45°
LOCATION OF FIREPLACE
1”
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.
Door
Opening
Safe
Zone
12”
Figure 5
Note: Local codes may not require firestopping
at the ceiling levels for outside chimney enclo-
sure installations. However, itisrecommended
for safety and the reduction of heat loss.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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ASSEMBLY STEPS
Top Spacer
CAUTION
Note: The following steps represent the normal
sequence of installation. Each installation is
unique, however, and might require a different
sequence.
The structural integrity of the
manufactured home floor, wall,
ceiling and roof must be main-
tained.
Maintain
1" (25 mm)
Air Space
At Back
And Sides
1. Position firebox prior to framing or into
prepared framing.
2. Install the chimney system.
Thefirestopthimblesuppliedwiththeunitmust
be used on a manufactured home installation.
The firestop thimble must extend completely
though the roof cavity to the outermost plane
of the roof (See Figures 16, 17 and 18).
Maintain 1" clearance between the thimble and
the chimney.
3. Connect house wiring to the fireplace
for blower (blower is optional for model
BC36MH).
4. Install the outside combustion air kit.
5. Plumb gas line if a decorative gas appliance
will be used. (Gas connections should only
be performed by an experienced, licensed/
certified tradesman).
Hearth
Extension
1" (25 mm) Space
Metal Safety Strip
Floor
Note: Hearth extensions must not interfere with
circulating grillwork
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.
6. Complete the installation, finish wall mate-
rial, surround and hearth extension to your
individual taste.
Figure 6
Studythethreedimensionalillustration(Figure
1) to get a general idea of each element of your
fireplace system.
Maintain
1" (25 mm)
Air Space
At Back
CLEARANCES
PRE-INSTALLATION NOTES
Minimum clearance to combustibles for the
appliance is as follows: sides and back - 1" (25
mm), floor - 0" (0 mm), adjacent wall - 12" (305
mm), ceiling - 37-1/2" (953 mm).
And Sides
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,beplacedonflatwood,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.
INSTALLING THE FIREPLACE
Hearth
Extension
1" (25 mm) Space
IMPORTANT: Plated polished brass glass
doors may have a plastic covering over all
brass pieces for protection during shipping
and handling. The plastic covering should
be removed after installation of the fireplace
before its use. Under the plastic covering is
a protective lacquer coating which should
not be removed. In some instances, if it is
removed, irreversible damage to the brass
finish could occur.
Metal Safety Strip
Platform
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.
Note: Hearth extensions must not interfere with
circulating grillwork
Figure 7
Usually, no special floor support is needed for
the fireplace, however, to be certain:
Note: Install the hearth extension only as il-
lustrated (see Pages 16 through 18).
Step 1. Slidethefireplaceintopreparedframing
orpositionfireplaceinitsfinalposition
and frame later.
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 7.
2. Measurethesquarefootageofthefloorspace
tobeoccupiedbythesystem,surroundsand
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.
4. Use this information and consult your local
building code to determine if you need ad-
ditional support.
The safety strips should extend from front of
the fireplace at least 1-1/2" and should extend
to be at least flush with the sides. In the event a
woodensupportisusedtoelevatethefireplace
above the floor, a “Z” type safety strip should
be fabricated and used to protect the front
surfaceofthewoodsupportaswellasthefloor
beneath the hearth extension (Figures 8 and
9). The safety strips should be tacked down to
prevent possible movement.
The fireplace may not be recessed into
a combustible floor. Maintain the floor
to hearth clearance established by the
fireplace lower front face.
Step 2. Inserttheprovidedmetalsafetystrips,
beneath the fireplace as illustrated
(Figures 6 through 9). The safety
stripsshouldoverlap1/2"forcontinual
coverage of the floor.
Note: The “Z” type safety strip is not sup-
plied.
Note: Safety strips are not required when fire-
place rests on a noncombustible surface.
CAUTION
Donotblocktheheat-circulating
air inlet and outlet ports. Doing
so may result in a potential fire
hazard.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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B
Optional
Floor
Bracket
A
1 ¹⁄₂"
Metal Safety Strips
D
Ceiling Framing
C
Framing Dimensions for Ceiling
Figure 8
Roof Framing
Framing Dimensions for Ceiling
Inches (millimeters)
Framing Dimensions for Roof
Inches
Flue Type
A
B
FTF8 at 1" (USA)
Blocking
Pitch
FTF8, Vertical
14-1/2"
14-1/2"
C
D*
(368 mm) (368 mm)
14-1/2" 25"
(368 mm) (635 mm)
14-1/2"
14-1/2"
14-1/2"
14-1/2"
17"
0/12
6/12
FTF8 Offset 30°
12/12
21-1/2"
Metal Safety Strips
Figure 10
* Perpendicular to roof ridge
Figure 9
Figure 11
Note:Theframeddepth,20-5/8"(524mm)from
a framed wall, must always be measured from
a finished surface. If a wall covering such as
drywall is to be attached to the rear wall, then
the 20-5/8" (524 mm) must be measured from
the drywall surface. It is important that this
dimension be exact.
Step 3. Refer to fireplace drawings and speci-
fications on Pages 6 and 7 for framing dimen-
sionsanddetails.Frameapplianceenclosureas
illustrated in Figure 12 on Page 7.
If the appliance is to be elevated above floor
level, a solid continuous platform must be
constructed.
WARNING
Under no circumstances can the
fireplacetopspacers(seeFigure
12)beremovedormodified, 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.
The header may rest on the top metal spacers,
but must not be notched to fit around them.
Consult all local codes.
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FIREPLACE SPECIFICATIONS
Product Reference Information
Cat.
No.
Model
Ship.
Wt.
Ship.
Volume
Back Wall of Chase/Enclosure
Including Finising Materials if any
FOAK-6 Outside
Air Kit
H4630
H4631
BC36MH
175 lb. 20.7 cu. ft.
BCD36MH 180 lb. 20.7 cu. ft.
ꢀ
(
(
s
S
e
e
e
e
n
N
o
o
tetes)
)
G
Framing Dimensions
Fireplace Opening Width
Header
A
B
C
D
E
41-1/4”
37-1/2"
28-3/4"
15-3/8"
70"
1048 mm
953 mm
730 mm
391 mm
1778 mm
889 mm
524 mm
498 mm
1257 mm
A
Rough
Framing Face
Inside Chase
(Unfinished Shown)
B
F
35"
Back wall of Chase/Enclosure
A
G
H
J
20-5/8"
19-5/8"
49-1/2"
Including Finising Materials if any
C
Fireplace Framing
Back Wall of
Chase/Enclosure
Including Finising
Materials
G
H
Notes
if any
Due to Lennox' ongoing commitment to quality,
all specifications, ratings and dimensions are
subject to change without notice.
D
A
J
F
Rough Framing Face (Unfinished Shown)
ꢀ All framing dimensions calculated for 1/2"
dry wall at the fireplace face. If sheathing the
chase or finishing with other thickness materials,
calculations will need to be made.
A
E
See Page 6 for Ceiling and Roof Framing
Dimensions
Rough
Framing Face
(Unfinished Shown)
27-1/4"
Diagrams & Illustrations Not to Scale
(692 mm)
Corner Installation
7-13/16"
(198 mm)
20-1/4"
(514 mm)
Appliance
Top Spacer
12-1/2"
(318 mm)
40"
(1016 mm)
1"
WH Report No.
J99025865A
(25 mm)
42"
(1067 mm)
Top View
Appliance Top Spacer
9-5/8"
(244 mm)
Combustion
Air Inlet
9-7/8"
(251 mm)
36"
(914 mm)
37"
(940 mm)
Gas Line
32"
(813 mm)
Access
37"
20-3/16"
Gas Line
Access
(940 mm)
(513 mm)
27-7/8"
(708 mm)
2"
(51 mm)
9-3/16"
9-1/16"
17-3/8"
(233 mm)
3-5/16"
(84 mm)
(230 mm)
(441 mm)
12-7/8"
7-3/16"
(183 mm)
(327 mm)
40"
Junction
Box
20-1/4"
(1016 mm)
42"
(1067 mm)
(514 mm)
Right Side
Left Side
Front
Figure 12
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Step 4. Fireplace should be secured to side
framing members using the full length
nailing tabs at the top and bottom of
the fireplace front face. Use screws,
8dnailsorequivalentfasteners(Figure
13). Thismanufacturedhomemodelis
also provided with floor brackets used
to secure the fireplace to the floor to
prevent shifting in transit.
ReferenceFigures10and11andtheirchartsfor
framing dimensions at Ceilings and Roofs.
Room Above
Innewconstruction,todeterminechimneycenter
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 14). Then plumb from ceiling or
roof level directly above hole which has just
been completed.
Firestop Spacer
Figure 15
Note: The use of floor brackets are optional.
They are included (unbent) inside the Com-
bustion Air Kit package, located inside the
firebox. RefertoFigure8forsuggestedbracket
placement.
Attic Above
1”
Clearance
Minimum
Firestop Thimble
Figure 16
Ensure the thimble penetrates the roof opening.
Thethimblemustextendcompletelythroughthe
ceiling or roof cavity to the outermost plane of
the roof. Note: Thimble extensions (F8-TE26)
are available from your dealer for constructions
in which the distance between the outside of the
roof and the inside of the ceiling exceeds 13".
The thimbles and their extensions provide for
zero clearances to combustibles and must be
usedattheceiling/roofinmanufacturedhomes
(Figures 17 and 18).
Screw, 8d
Nail Or
Equivalent
Fastener
Figure 13
Note: The nailing tabs and the area directly
behind the nailing tabs are exempt from the
clearances described on Page 5. Maintain at
least 1/2" clearance from the firebox wrapper
to the framing at the closest point of contact,
directly adjacent to the flange.
Figure 14
Step 3. Position appropriate thimble/firestop
spacer combination at ceiling and
nail temporarily with two (2) 8d nails
or equivalent fasteners (see Figures
16, 17 and 18). Use one fastener on
oppositesidestoholdthimble/firestop
spacer combination in position. Nail
permanently, using at least two (2)
morefasteners,afterchimneysections
have been assembled through the
thimble/firestop spacer combination
and after any necessary adjustments
havebeenmade. Firestopspacermust
besecuredbyatleastfour(4)fasteners
when completely installed.
Outer Pipe Of
Chimney
INSTALLING THE CHIMNEY SYSTEM
14" Min.
Step 1. Beforecontinuing,checktheoperation
of the damper, as described on Page
4, (refer to Figure 2).
Step 2. Using standard construction fram-
ing techniques, construct opening
for chimney route up through the
ceiling(s) and roof or through an
outside chase.
Thimble
FM8-AT1
Pitched Roof
Outer Pipe Of
Chimney
Note: Trim Thimble/
Extension To Desired Length
And Pitch At The Rood Line
14" Min.
Thimble
Extension
F8-TE26
Framing must maintain adequate minimum air
space clearance at all times.
13"
Thimble
FM8-AT1
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 thimble must be installed on the
bottom side of ceiling joist (Figure 15).
CAUTION
Pitched Roof
Allow minimum 1" chimney
air space to framing members
throughoutchimneyinstallation.
A minimum 1" air space must be
maintained from all insulation
and building materials extend-
ing for any continuous length
surrounding the chimney.
Outer Pipe Of
14" Min.
Chimney
Thimble
FM8-AT1
Bow Roof
Figure 17
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Install the Model FTF8-S4 stabilizer by fitting
inner section down into respective section of
proceeding flue pipe and locking outer stabilizer
section into place over the outer chimney pipe.
Position for proper clearance through framed
opening and nail straps securely (under tension
in “shear”) into place on framing. Use 8d nails.
Attach successive lengths of chimney pipe
directly to stabilizer using same techniques as
described in Step 4 (Figure 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 20).
WARNING
Donotallowinsulatingmaterialsto
be blown into the space inside the
thimbleandthechimney. Todoso
could result in a fire hazard.
Outer Pipe Of
Thimble Cathedral
Ceiling
Chimney
Locking
Tabs
(Lances)
14" Min.
Figure 20
Use Adjustable Thimble
FM8-AT1 For All Ceiling
Piches, From Flat To
3/12 Pitch.
FTF8-S4 Stabilizer
Note: Assemble one component of chimney
at a time (inner section first, then outer section
last) before proceeding with the next complete
section.
Figure 22
Figure 18
Note: Do not apply excessive pressure to any
subsequent chimney sections following the
stabilizer when installing. Ensure each subse-
quent chimney section is securely attached by
testing as noted in Step 4.
Step 4. Note: Chimney sections are con-
structed with a unique locking tab
design, which ensures an immediate,
tight assembly between sections. Plan
your chimney requirements carefully
beforeassemblyaschimneyisdifficult
to disassemble after installation. If
disassembled, the tabs might become
damaged. Be certain tabs are properly
formed to ensure locking tabs engage
properly.
Continue to assemble the chimney up through
framed opening. Assemble just enough to
penetrate the roof flashing openings (Figure
21). Maintain 1" minimum air space to insula-
tion and building materials and always check
each chimney joint (inner and outer) to ensure
proper engagement. Check vertical alignment
of chimney so that it projects from the roof in
true vertical position.
Step 6. Select the proper Security Chimneys
roof flashing based on pitch of roof.
Use chart below for selection:
Roof Pitch
Flat to 6/12
6/12 to 12/12
FTF8
F8-F6
F8-F12
The Security Chimneys FTF8 chimney system
is a two piece chimney, which snap together
from the fireplace up. Start with the inner flue
section with the lanced end up, snap lock it in
to the matching collar on top of the fireplace.
At all subsequent joints, the upper flue section
fits into the preceding flue section. Each piece
snaps together by means of locking tabs (9
locking tabs per joint). Check each piece by
pullingupslightlyfromthetoptoensureproper
engagement before installing the next section.
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 19).
Table 2
Next,slideroofflashingoverextendedchimney
sectionthatpreviouslyhasbeeninstalledabove
the roof opening in Step 4. Slide flashing all the
way down until the flashing base rests flat on
the roof (Figure 23). Again, check the vertical
position of the chimney and the minimum air
space to combustibles.
Figure 21
Security's chimney sections do not need to be
screwed together. Additional reinforcement is
notnecessaryexceptincertainoffsetconditions
(refer to Page 13, Figure 35).
FTF8 Chimney
FTF8 Flashing
Step 5. Theheightofverticalchimneypipesup-
ported only by the fireplace must not
exceed30'.Chimneyheightsabove30'
mustbesupportedbyaModelFTF8-S4
stabilizer installed at 30' intervals.
Note: The Model FTF8-S4 adds 3" net effective
height to the total chimney system.
Figure 23
Figure 19
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Step 7. Secure flashing by nailing along the
perimeter into roof using 8d nails or
equivalent fasteners. If shingled roof,
slideupperendandsidesofroofflash-
ing under shingles (trim if necessary),
seal the top and both sides of the
flashing to the roof with roof caulking.
Coverfastenerheadswithroofcaulking
(Figure 24).
Note: If chimney extends more than 8' 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 trian-
gular pattern (Figure 26). Guy wires are not
supplied by the manufacturer.
3. Center outer locking section over outer flue
pipe.Pushdownuntillockingtabsarefirmly
engaged.
4. Pull up slightly on CTD to ensure locking
joint has firmly engaged.
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 manu-
facturers instructions for proper preparation
and application.
Roof Ridge
120°
Figure 26
TEN FOOT RULE SUMMARY
Figure 24
Step 10. Using a CTD Termination:
The minimum chimney height above the roof
and/or to adjacent walls and buildings is speci-
fied by all major building codes.
Step 8. The standard Security Chimneys FTF8
roof flashing assemblies include a
stormcollar.Slidethestormcollarover
outerchimney,restonflashingspacers
and align with top surface of flashing.
Insert 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.Alsoaddextraroofcaulkingtothe
tab/slotareatosealcompletelyagainst
water penetration (Figure 25). Check
all joints very carefully to ensure no
water intrusion can take place.
1. HoldtheCTDovertopoflastchimneysection
(Figure 27).
If the horizontal distance from the peak of the
roofislessthen10',thetopofthechimneymust
be at least 2' above the peak of the roof.
2. Center inner slip section in inner flue pipe-
slip down.
If the horizontal distance from the chimney
edge to the peak of the roof is more than 10' a
chimney height reference point is established
on the roof surface 10' horizontally from the
chimney edge. The top of the chimney must
be at least 2' above this reference point. In all
cases,thechimneycannotbelessthen3'above
the roof at the edge of the chimney.
CTD
Termination
Chimney
The 2' in 10' rule is necessary in the interest
of safety but does not ensure smoke-free op-
eration. Trees, buildings, adjoining roof lines,
adverse wind conditions, etc., may require a
taller chimney should the fireplace not draft
properly (Figure 28).
Locking Band
Mastic
Or Roof
Caulking
Figure 27
Less than
10' (3m)
Figure 25
2' (610mm) Min.
Step 9. FTF locking bands, 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' above the roof flashing,
the use of locking bands is advisable
to strengthen the chimney assembly.
Align the locking band at the chimney
joint. Locking bands wrap around pipe
jointsequallycoveringthejointsofboth
pipesections.Usethenutprovidedand
TIGHTENsnugly.Donotovertightenas
thismightdamagethechimneysection
(refer to Figure 25).
3' (914mm)
Min.
10' (3m)
3' (914mm)
Min.
Figure 28
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Maximum offset of chimney system is 30°.
Two offsets 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 25'.
FTF8 CHIMNEY COMPONENT
CALCULATIONS
Room Above
F8FS30
1" Min.
Firestop Spacer
The minimum installed height of the completed
fireplacesystemis10'6". Themaximumheight
is 40' 0" when the chimney is exposed.
Air Space
Return elbow support straps must be securely
attached under tension (in shear) to structural
framing members above. Do not substitute a
FTF8-30 offset elbow in place of a FTF8-E30
return elbow.
To determine the number of chimney sections
and chimney components required, follow
these steps:
1" Min.
FTF8-S4 Stabilizer
Air Space
30° Firestop
10'
Max.
And Room Above
1. Determinetotalverticalheightofthefireplace
installation. This dimension is the distance
from the surface the fireplace sets on to the
point where smoke exits from the termina-
tion.
Figure 29
OFFSET CALCULATIONS
To clear any overhead obstructions, you may
offsetyourchimneysystemusingSecurity's30°
offset and return elbows. Use two elbows - an
offset elbow to initiate the offset and a return
elbowtoterminateit.A30°offsetelbow,angling
inanydirection,maybethefirstcomponentused
off the top of the fireplace flue collar.
Step1.UseOffsetCharttodetermineamountof
horizontal offset (A) and height (B) for various
chimney section assemblies.
2. Determine the number of chimney compo-
nents required, except chimney sections.
This would include thimbles, extensions,
roof flashing, etc.
Step 2. Use “Height of Chimney Only” column
in The Vertical Elevation Chart to determine
combinations of chimney used above return
elbow to achieve desired heights. Reference
Components Effective Height Chart in vertical
elevation chart section.
3. The effective heights of the components
are:
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' in
total length between elbows. If sections of pipe
exceed10'betweenelbows,achimneystabilizer
must be used at the midpoint (see Figure 30).
The stabilizer support straps must be attached
under tension (in shear) to structural framing
members above. When two sets of elbows
are used, the maximum combined length of
chimney used between elbows cannot exceed
20' (see Figure 31). Example: If C1 = 10' then
C2 cannot exceed 10'.
The Fireplace
FTF8-12
FTF8-18
FTF8-24
FTF8-36
=
=
=
=
=
=
37”
Step3.UseElevationChartasjobestimatoronly.
Add necessary firestop spacers and stabilizers
as required. Firestop spacers must be used as
shown in Figure 29 and stabilizers as shown
in Figure 22.
10-1/4”
16-1/4”
22-1/4”
34-1/4”
46-1/4”
FTF8-48
FTF8-CTD Termination = 6”
4 Determineamounofchimneyheightrequired
by subtracting total combined height of all
pre-selected components (fireplace and
chimney components from total desired
height).
A1
Return
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
metalscrewlocatedattheundersideofthejoint
(see Figure 33).
Elbow
C2
20'
Max.
Reference Vertical Elevation Chart and deter-
minethenumberofchimneysections(quantity
and length) required.
B1
Stabilizer
C1
A 1/8" diameter hole must be drilled in the
chimney joint using a 1/8” diameter drill. Hole
should be drilled in center of joint overlap (see
Figure 33). Be sure to drill only through the
outer chimney casting. Do not puncture the
inner flue.
SPECIAL OFFSET INSTRUCTIONS
10' Max.
Chimney 30° Offset through Floor or Ceiling
Offset
Elbow
It may be necessary to assemble the chimney
at30°whenpassingthroughthefloororceiling
area.UsetheF8FS30-2firestopspacerasshown
in Figure 29. Support the chimney at floor or
ceiling penetration with a FTF8 stabilizer if dis-
tance of chimney below ceiling is 10' or more.
Maintain1"minimumairspacetocombustibles
fromchimneysections. Thechimneymustpass
vertically through the attic space.
Figure 30
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FTF8 VERTICAL ELEVATION CHART
Height Of
Chimney Only
Number Of FTF8
Chimney Components
Height Of
Chimney Only
Height Of
Chimney Only
Number Of FTF8
Chimney Components
Height Of
Chimney Only
Inches Feet/Inches 12" 18" 24" 36" 48" -S4
Meters
Inches Feet/Inches 12" 18" 24" 36" 48" -S4
Meters
6.29
6.44
6.55
6.70
6.85
7.00
7.05
7.16
7.31
7.46
7.61
7.72
7.87
8.03
8.18
8.22
8.33
8.48
8.64
8.79
8.90
9.05
9.28
9.43
9.47
9.58
9.73
9.89
10.04
10.15
10.30
10.45
10.60
10.65
10.76
10.91
11.06
11.21
11.32
11.47
11.63
11.78
11.82
11.93
12.08
12.24
12.34
10 ¹⁄₄
16 ¹⁄₄
22 ¹⁄₄
26 ¹⁄₂
32 ¹⁄₂
34 ¹⁄₄
38 ¹⁄₂
44 ¹⁄₂
46 ¹⁄₄
50 ¹⁄₂
56 ¹⁄₂
62 ¹⁄₂
68 ¹⁄₂
72 ³⁄₄
78 ³⁄₄
84 ³⁄₄
90 ³⁄₄
92 ¹⁄₂
96 ³⁄₄
102 ³⁄₄
108 ³⁄₄
114 ³⁄₄
119
0
1
1
2
2
2
3
3
3
4
4
5
5
6
6
7
7
7
8
8
9
9
9
10
10 ¹⁄₄
4 ¹⁄₄
10 ¹⁄₄
2 ¹⁄₂
8 ¹⁄₂
10 ¹⁄₄
2 ¹⁄₂
8 ¹⁄₂
10 ¹⁄₄
2 ¹⁄₂
8 ¹⁄₂
2 ¹⁄₂
8 ¹⁄₂
³⁄₄
1
0
0
1
1
0
0
1
0
0
1
0
0
1
1
0
1
0
0
1
0
0
1
1
0
1
0
0
1
0
0
1
1
0
1
0
0
1
0
0
1
1
0
1
0
0
1
0
1
0
1
0
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
0
0
1
0
1
0
1
0
0
0
0
0
1
0
1
1
0
0
0
0
0
1
0
1
1
0
0
0
0
0
1
0
1
1
0
0
0
0
0
1
0
1
1
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
0
0
0
1
0
1
1
1
1
1
1
1
2
1
2
2
2
2
2
2
2
3
2
3
3
3
3
3
3
3
4
3
4
4
4
4
4
4
4
5
4
5
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
0.26
0.41
0.57
0.67
0.83
0.87
0.98
1.13
1.17
1.28
1.44
1.59
1.74
1.85
2.00
2.15
2.31
2.35
2.46
2.61
2.76
2.91
3.02
3.18
3.33
3.48
3.52
3.63
3.78
3.94
4.09
4.20
4.35
4.50
4.65
4.70
4.81
4.96
5.11
5.26
5.37
5.52
5.68
5.83
5.87
5.98
6.13
247 ¹⁄₂
253 ¹⁄₂
257 ³⁄₄
263 ³⁄₄
269 ³⁄₄
275 ³⁄₄
277 ¹⁄₂
281 ³⁄₄
287 ³⁄₄
293 ³⁄₄
299 ³⁄₄
304
20 7 ¹⁄₂
21 1 ¹⁄₂
21 5 ³⁄₄
21 11 ³⁄₄
22 5 ³⁄₄
22 11 ³⁄₄
23 1 ¹⁄₂
23 5 ³⁄₄
23 11 ³⁄₄
24 5 ³⁄₄
24 11 ³⁄₄
0
0
1
1
0
1
0
0
1
0
0
1
1
0
1
0
0
1
0
0
1
1
0
1
0
0
1
0
0
1
1
0
1
0
0
1
0
0
1
1
0
1
0
0
1
0
1
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
1
0
1
0
0
1
0
1
0
0
1
0
1
1
0
0
0
0
0
1
0
1
1
0
0
0
0
0
1
0
1
1
0
0
0
0
0
1
0
1
1
0
0
0
0
0
1
0
1
1
0
0
0
0
0
1
0
0
0
0
0
1
0
1
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
1
0
1
0
0
1
5
5
5
5
5
5
6
5
6
6
6
6
6
6
6
7
6
7
7
7
7
7
7
7
8
7
8
8
8
8
8
8
8
9
8
9
9
9
9
9
9
9
10
9
10
10
9
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
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
25
25 10
26
4
310
316
4
6 ³⁄₄
³⁄₄
322
323 ³⁄₄
328
334
340
26 10
26 11 ³⁄₄
6 ³⁄₄
8 ¹⁄₂
³⁄₄
27
27 10
28
4
4
6 ³⁄₄
³⁄₄
346
28 10
350 ¹⁄₄
356 ¹⁄₄
365 ¹⁄₄
371 ¹⁄₄
373
29 2 ¹⁄₄
29 8 ¹⁄₄
30 5 ¹⁄₄
30 11 ¹⁄₄
6 ³⁄₄
11
5
125
131
137
10 11
11
31
1
5
377 ¹⁄₄
383 ¹⁄₄
389 ¹⁄₄
395 ¹⁄₄
399 ¹⁄₂
405 ¹⁄₂
411 ¹⁄₂
417 ¹⁄₂
419 ¹⁄₄
423 ¹⁄₂
429 ¹⁄₂
435 ¹⁄₂
441 ¹⁄₂
445 ³⁄₄
451 ³⁄₄
457 ³⁄₄
463 ³⁄₄
465 ¹⁄₂
469 ³⁄₄
475 ³⁄₄
481 ³⁄₄
486
31 5 ¹⁄₄
31 11 ¹⁄₄
32 5 ¹⁄₄
32 11 ¹⁄₄
33 3 ¹⁄₂
33 9 ¹⁄₂
34 3 ¹⁄₂
34 9 ¹⁄₂
34 11 ¹⁄₄
35 3 ¹⁄₂
35 9 ¹⁄₂
36 3 ¹⁄₂
36 9 ¹⁄₂
37 1 ³⁄₄
37 7 ³⁄₄
38 1 ³⁄₄
38 7 ³⁄₄
38 9 ¹⁄₂
39 1 ³⁄₄
39 7 ³⁄₄
40 1 ³⁄₄
138 ³⁄₄
143
149
155
161
11 6 ³⁄₄
11 11
12
12 11
13
5
5
165 ¹⁄₄
171 ¹⁄₄
177 ¹⁄₄
183 ¹⁄₄
185
189 ¹⁄₄
195 ¹⁄₄
201 ¹⁄₄
207 ¹⁄₄
211 ¹⁄₂
217 ¹⁄₂
223 ¹⁄₂
229 ¹⁄₂
231 ¹⁄₄
235 ¹⁄₂
241 ¹⁄₂
13 9 ¹⁄₄
14 3 ¹⁄₄
14 9 ¹⁄₄
15 3 ¹⁄₄
15
5
15 9 ¹⁄₄
16 3 ¹⁄₄
16 9 ¹⁄₄
17 3 ¹⁄₄
17 7 ¹⁄₂
18 1 ¹⁄₂
18 7 ¹⁄₂
19 1 ¹⁄₂
19 3 ¹⁄₄
19 7 ¹⁄₂
20 1 ¹⁄₂
40
6
Table 3
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FTF8 OFFSET ELEVATION CHART
A
B
Number of FTF8
Chimney Sections
A
B
Offset
Height
FTF8-S4
Offset
Height
A2
(Inches)
(Inches)
Stabilizer
12"
18"
24"
36"
48" (meters) (meters)
4
9 ¹⁄₈
15 ³⁄₄
24 ⁵⁄₈
29 ³⁄₄
33 ¹⁄₂
35
38 ⁵⁄₈
43 ⁷⁄₈
45 ³⁄₈
47 ¹⁄₂
49
52 ³⁄₄
55 ³⁄₄
57 ⁷⁄₈
59 ³⁄₈
63 ¹⁄₈
64 ⁵⁄₈
66 ³⁄₄
69 ⁷⁄₈
72
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
1
0
2
0
1
0
0
2
0
1
0
1
0
0
0
2
0
2
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
0
0
1
2
0
1
1
2
0
1
1
2
0
1
1
0
0
1
2
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
0
0
0
1
0
0
0
0
1
0
0
1
0
1
1
1
0
2
0
1
2
0
0
0
0
1
0
0
1
0
0
0
0
1
0
0
1
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
1
0
1
0
0
0
2
1
0
1
2
0
1
1
0
2
1
1
2
0
1
1
0
2
1
1
2
0
1
1
0
2
1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
1
0
2
1
1
2
1
1
2
1
3
2
2
3
2
2
3
2
4
3
3
4
3
4
5
0.10
0.23
0.31
0.36
0.38
0.44
0.51
0.54
0.57
0.59
0.64
0.69
0.72
0.74
0.80
0.82
0.85
0.90
0.93
0.97
1.03
1.08
1.12
1.18
1.28
1.33
1.41
1.48
1.56
1.61
1.75
1.80
1.90
1.96
2.03
2.11
2.18
2.24
2.34
2.39
2.49
2.54
2.62
2.70
2.77
2.92
3.08
0.40
0.63
0.76
0.85
0.89
0.98
1.11
1.15
1.21
1.25
1.34
1.42
1.47
1.51
1.60
1.64
1.70
1.77
1.83
1.91
2.00
2.09
2.17
2.26
2.43
2.53
2.66
2.79
2.92
3.02
3.25
3.35
3.52
3.61
3.74
3.88
4.01
4.10
4.27
4.36
4.54
4.63
4.76
4.89
5.02
5.29
5.55
C2
B2
12 ¹⁄₈
14 ¹⁄₄
15 ¹⁄₈
17 ¹⁄₄
20 ¹⁄₄
21 ¹⁄₈
22 ³⁄₈
23 ¹⁄₄
25 ³⁄₈
27 ¹⁄₈
28 ³⁄₈
29 ¹⁄₄
31 ³⁄₈
32 ¹⁄₄
33 ¹⁄₂
35 ¹⁄₄
36 ¹⁄₂
38 ¹⁄₄
40 ³⁄₈
42 ¹⁄₂
44 ¹⁄₄
46 ³⁄₈
50 ¹⁄₄
52 ³⁄₈
55 ³⁄₈
58 ³⁄₈
61 ³⁄₈
63 ¹⁄₂
68 ⁷⁄₈
71
74 ⁷⁄₈
77
80
83
86
88 ¹⁄₈
92
94 ¹⁄₈
98
100 ¹⁄₈
103 ¹⁄₈
106 ¹⁄₈
109 ¹⁄₈
115 ¹⁄₈
121 ¹⁄₈
A1
B1
C1
A2
75
C2
78 ³⁄₄
82 ³⁄₈
85 ³⁄₈
89 ¹⁄₈
95 ³⁄₄
99 ¹⁄₂
104 ⁵⁄₈
109 ⁷⁄₈
115 ¹⁄₈
118 ³⁄₄
128
131 ³⁄₄
138 ¹⁄₂
142 ¹⁄₈
147 ³⁄₈
152 ¹⁄₂
157 ³⁄₄
161 ³⁄₈
168 ¹⁄₈
171 ³⁄₄
178 ¹⁄₂
182 ¹⁄₈
187 ³⁄₈
192 ⁵⁄₈
197 ³⁄₄
208 ¹⁄₈
218 ¹⁄₂
B2
A1
B1
C1
Figure 31
Joints
t
A
'
d
6
e
Chimney
Section
r
t
s
i
u
a
q
P
t
e
4'
R
n
i
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Figure 32
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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Offset Elbow Assembly
IMPORTANT
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 lock OVER the
preceding outer section of chimney. Again,
check outer section by pulling up slightly to
ensure proper connection is made.
The fireplace must be wired to
thehouseelectricalsystematthe
time of installation in order for
thefanstooperate,(SeeFigures
36 and 37).
Underside Of Chimney
Figure 33
POWER TO THE FIREPLACE
The Optional Blower Kit
Operates on 115 volt 60 Hz
150 watts AC
Return Elbow Assembly
Return elbows install the same way as round
terminations and stabilizers:
FTF8-E30 Return Elbow*
Chimney Section (S)
FTF8-30 Offset Elbow*
HOUSE
Step 1. Hold return elbow over top of last
chimney section.
WIRING
Step 2. Center inner slip section into inner flue
pipe-slip down.
Step 3. Centerouter-lockingsectionoverouter
chimneypipe.Pushdownuntillocking
joint has firmly engaged.
Step 4. Pullupslightlyonreturnelbowtoensure
locking joint has firmly engaged.
Step 5. Secure support straps to framing
members by nailing under tension in
sheer (Figure 35).
B
A
GROUND
WIRE
COVER PLATE
Replace Cover Plate
After Electrical
Hook-Up
House Wiring Must Be Secured
With The Appropriate Electrical
Connector To The Fireplace
Convenience Outlet Wiring
Figure 36
*Part of Offset/Return Package Model FTF8-ES30
Figure 34
Return
Elbow
INSTALLING OFFSETS
Figure 35
Notes:
First, review the Offset Elevation Chart and
Figure 34 for reference.
•
The return elbow assembly performs the
same function as a stabilizer. Consider this
when determining the need for a stabilizer.
BLOWER THREE
PRONGED PLUG TO
GROUNDED OUTLET
Step 1. Determine the offset distance where
chimney is to pass through the first
ceiling-dimension “A.” To find this
point on your ceiling, first determine
the center point for a vertical chimney
following the instructions for vertical
installation.
• Do not apply excessive pressure to any
subsequentchimneysectionfollowingreturn
elbowassemblywheninstalling.Ensurethat
eachsubsequentchimneysectionissecurely
attached by testing as noted above.
Figure 37
Note: The utilization of fans will increase the
air flow around the firebox. However, only
a minimal increase in heat output should be
anticipated.
Measure height to the ceiling from
the top of fireplace-dimension “B.”
Use the appropriate 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.
OPTIONAL EQUIPMENT
CONSIDERATIONS
Blower Kit
A Blower Kit model BFK36 is preinstalled,
standard, on model BCD36MH and is available
as an option for model BC36MH. The optional
Blower Kit can be installed prior to or after
installation of the fireplace.
IMPORTANT
This fireplace is not intended
to be used as a substitute for a
furnace to heat an entire home.
Use for supplementary heating
only.
Step 2. Proceed by using the Straight Up In-
stallation Instructions for cutting and
framing ceiling and roof openings.
Note: These fireplace models are not supplied
with an optional wall switch (FWSK) for fan
operation. BFK36 blower kits may be operated
with their integral blower (On/Off) switch.
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.
TheBFK36BlowerKitisdesigncertifiedbyWar-
nock Hersey for use with these appliances.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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Always check local building codes. Instal-
lation of the BFK36 Blower Kit must comply
with local regulations as well as the National
Electric Code.
Combustion Air
Actuator
CAUTION
When using the decorative gas
appliance, the fireplace damper
must be set in the fully open
position.
Combustion Air Kits
These appliances are equipped with an outside
(make-up)airdoorandintegralactuatorarmand
an outside air kit with a collar, duct and hood
(90L83). The appliance must be installed with
an outside air vent system (Figure 38). These
kits come complete with detailed installation
instructions and all components necessary in
completing a combustion air vent system.
“Pop” Actuator to
the Left Before
Initial Use
CAUTION
Plumbing connections should
only be performed by a quali-
fied, licensed plumber. Main
gas supply must be off when
plumbing gas line to fireplace
or performing service.
Non-Combustible
Class 0 Or Class 1
6 Inch Air Inlet Duct
Pull Forward to Open,
Push Back to Close
Ifyou’reinstallingagasline,connectitbeforethe
fireplace is framed and enclosed in the finished
wall. The gas knockout is determined by the
indentation located at the bottom and slightly
off center in the side refractories. THE KNOCK-
OUTISALWAYSREMOVEDFROMINSIDETHE
FIREPLACE.DONOTREMOVETHEKNOCKOUT
UNLESS YOU ARE INSTALLING A GAS LINE.
If removal is attempted from the outer wrap-
per, side refractory damage may occur. With a
medium-sizedhammer,lightlytapthesurfaceof
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
doesnothavetoberemoved.Removeinsulation
in the gas line channel.
Actuator
Clamp
Arm
Securely
At Top And
Bottom
Figure 39
Gas Line Connection
Install a 1/2” gas supply line through fireplace
wallforconnectiontoadecorativegasappliance
inside the firebox. Outside, the gas supply line
connects to a gas shut-off valve recessed flush
into the wall or floor. The valve should be con-
trolled by a removable valve key for safety.
Air Inlet Assembly
(Attach To Floor)
Vented Crawl Space
Always plumb gas line installation per local
codes. Check all connections using a gas leak
test solution (also referred to as bubble leak
solution). Note: Using a soapy water solution
(50% dish soap, 50% water) is an effective
leak test solution but it is not recommended,
because the soap residue that is left on the
pipes/fittings can result in corrosion over time.
Never test any gas line connection with a match
or open flame.
Figure 38
After completing the installation of the com-
bustion air vent system the actuator arm must
be put in service and tested to ensure proper
operation before completing any enclosure
around the firebox. Failure to do so may result
in extensive and costly rework.
IMPORTANT
Repack insulation material in
square hole around gas line,
interiorandexterioroffireplace,
to seal.
Locate the actuator arm along the right side
of the appliance firebox opening and refer
to Figure 39. To operate, push the end of the
actuator to the left as shown in Figure 39, until
it "pops" free of its "locked" position. Pull the
actuator forward to open the combustion air
door, and push it back to close. To "lock" the
combustionairdoorclosed,ensuretheactuator
is pushed all the way back then push the end
of the actuators to the right until the step in the
actuator moves behind the appliance front face
within the slotted opening.
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 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.
COLD CLIMATE INSULATION
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
blackmetalfacingofthefireplacetoavoidcold
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 chim-
ney sections.
WARNING
Operate the actuator through several cycles
including the "lock position. Ensuring proper
operation and freedom of movement. Return
the actuator arm to the locked position.
Thisfireplacehasnotbeentested
with an unvented gas log set. To
reduce risk of fire or injury, do
not install an unvented gas log
set into this fireplace.
Note: 1" (25 mm) air space must be preserved
for all materials extending for any continuous
length adjacent to the chimney.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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Note: A 1" air space must be preserved for all
combustible materials extending for any con-
tinuous length adjacent to the chimney.
Hearth Extensions and Wall Shields
FIREPLACE FINISHES
Mantels and Trim
A hearth extension must be installed with all
fireplaces. Its purpose is twofold. It protects a
combustible floor in front of the fireplace from
bothradiantheatandsparksanditdistinguishes
theprescribedhearthextensionareafromother
non-protected surfaces.
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
notplaceinsulationdirectlyagainstthefireplace
or chimney system.
Itissometimesbesttoframeyourfireplaceafter
it is positioned and the chimney is installed.
Frameenclosureforchimneyandfireplacewith
materials of suitable grade and size as dictated
by the prevailing constructions standards for
the structure in which the fireplace system is
to be located within.
The hearth extension must extend 16" beyond
thefrontand8"beyondbothsidesofthefireplace
opening. 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. A minimum 3/8" (10 mm) thick
noncombustible material is all that is required
over a noncombustible or slab floor.
Glass Doors
Note: The header may rest on the two (2) metal
topspacersontopoftheunitbuttheheadermust
not be notched to fit around the spacers.
Glass doors have been installed on these
fireplaces as standard equipment. Shipping
and transit may have moved them out of
alignment.
These fireplaces may sit directly on a combus-
tible surface. A 1" air space is required between
framing, insulation, building materials and the
chimney. A 1" air space is required between
framing, insulation, building materials and the
fireplace outer wrapper.
The doors are properly adjusted when the top
door trim is in a straight, level line and the
gap between the doors is even at the top and
bottom. If adjustments are required, grasp the
doorhandleandloosenthelowerdoorpivotpin
using a 3/8” open end wrench*. Slide the door
panel on the hinge pin until the gap between
the upper door trim and upper frame is even.
Retighten the lower door pivot pin*. Repeat
this procedure for the opposite door if needed
(Figure 40).
If there is a continuous perpendicular side wall
closer than 12" (305 mm) from the fireplace
opening, it must be protected with a 24" x
30"x 1/2" (610 mm x 762 mm x 13 mm) wall
shield(seeFigure42)constructedofadurable,
noncombustible material having an equal or
better (lower k value) insulating value than k =
.84 BTU IN/FT2 HR °F. A continuous protected
side wall can not be closer than 7" (178 mm)
from the side of the fireplace opening.
Combustible mantels and trim may be installed
12" above the fireplace opening as per NFPA
211-latest edition. and Figure 41. If a mantel
is of a noncombustible material, it is exempt
from these requirements as long as it does
not interfere with the installation or operation
of glass doors.
Secure the hearth extension to the floor to
prevent possible shifting.
Spring Clip
Upper Door
Guide Track
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 and 7).
Roller
Pin
Finished
Pivot Pin
12"
Wall
Max.
1 1/2"
Header
Spacer
Combustible
Mantel
and Trim
12"
Min.
Figure 40
9 5/8"
*Note: Upper door pivot pins can also be
loosened for adjustment purposes; however,
it is easier to loosen lower pins.
Fireplace
Opening
Typical Installation
Figure 41
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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Wall Shield Required Where
Less Than 12". Adjacent Wall Is
Never Allowed Closer Than 7".
Hearth Extension Dimensions
24"
A
B
C
D
16"
30"
8"
Protected
Side Wall
30"
46"
C
C
B
D
Note: To convert inches to millimeters divide by .03937.
C
A
B
D
C
A
Figure 42
Methods of Determining Hearth Extension and Wall Shield
Listed Material
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.
k (per inch) r (per inch)
Listed Min.Thickness
Listed Material
.84
1.19
rL
1"
KL
TL
Example: If Micore 160 is to be used for the hearth extension fireplace,
how thick must this material be?
** Approved Alternate Materials for Floor/Hearth Protection
AlternativeMaterials
Thermal Values
MinimumThickness
(rounded to nearest 1/8 inch)
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
k (per inch) r (per inch)
Min. Thickness
KM
rM
TM
Kaowool M Board
.47
.35
2.13
2.86
.56" (1/2")
.42" (3/8")
Micore 160™
U.S. Gypsum
kL = k value per inch of listed material
rL = r value per inch of listed material
TL = minimum thickness of listed material
Micore 300™
U.S. Gypsum
.46
2.17
.52
.55" (1/2")
Durock™ Cement Board
U.S. Gypsum
1.92
2.29" (2-1/4")
Note: An asterix "*" indicates, it is a value taken from Table 5.
Using the k formula:
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™
Minimum
k-value (per Inch) of
alternate material (kM) x
k-value (per inch)
Specified min.
thickness
thickness of
alternate
=
Cultered Stone Hearth-
stone™
of listed
material (TM)
of listed material (kL)
material (TL)
Wonderboard
3.23
.61
.31
3.85" (3-7/8")
.73" (3/4")
Super Firetemp M
Johns-Manville
1.64
TM (inches)
=
=
k
M
x
x
x
TL
1"
1"
*.84
Super Firetemp L
Johns-Manville
.54
1.85
.64" (5/8")
TM (inches)
*.35
*.84
Face brick
9.00
5.00
5.00
12.5
~11
.111
.20
10.71" (10-3/4")
5.95" (6")
Common brick
Cement mortar
Ceramic tile
Marble
.416 (inches)=
.416
.20
5.95" (6")
.08
14.88" (14-7/8")
13.10" (13-1/8")
Answer -TheminimumrequiredthicknessoftheMicore160is.417,"there-
fore round up to nearest standard thickness available which is 1/2."
~.09
Table 5
Using the r formula:
Minimum
thickness of
alternate
material
r-value (per Inch)
of listed material
r-value (per inch)
of alternate material
Specified min.
thickness
of listed
** If the hearth extension material(s) that is intended to be used is NOT listed
on Table 5, the material can still be used if the material(s) is noncombustible.
However,themanufacturerofthematerialmustprovideeitherthelistedk-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).
=
x
x
material
rL
rM
TM (inches)
=
=
TL
Note: Also see NFI (National Fireplace Institute) Certification Manuals showing
other exceptable caluculation methods and acceptable alternate materials
which can be used.
TM (inches)
*1.19
* 2.86
x
x
1"
1"
.417 (inches)=
.416
Answer -TheminimumrequiredthicknessoftheMicore160is.417,"there-
fore round up to nearest standard thickness available which is 1/2."
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Calculating Minimum Thickness if
Multiple Materials are Used
WARNING
Combustible
Materials
When installing hearth extension
in front of a non-circulating fire-
place model, the fireplace must be
raised if height of hearth extension
exceeds 3-5/16" above the bottom
of fireplace (Figure 43).
At times it is important to know what
combinationofmaterialsareacceptableforuse
as floor protection. The “R values” are used to
determineacceptablecombinationsofmaterials
because “R values” are additive where r and k
values are not.
Allowed In
Shaded Area
“Safe Zone”
Fireplace
1"
7"
45
12"
Min. Distance To
7"
“R value” = 1/k = "r" x thickness of material
used
Protected Side Wall
When installing the hearth exten-
sion be careful not to block the
heat-circulating air inlet grill on
circulating models.
Min. Distance To
12"
Unprotected Side Wall
Example: Given that the required “R value”
for a suitable floor protector used must be
equal to or greater than:
Figure 44
“R” = rL x TL = 1.19 x 1” = 1.19."
ACCESSORY PARTS AND COMPONENTS
LIST FOR MODELS BCD36MH AND
BC36MH
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?
Theaccessorypartsandcomponentsshownon
Pages 18 and 19 are to be used only with your
BCD36MH or BC36MH fireplace system.
If common brick is used so that the 3 1/2”
dimension is the height, “R” for the common
3-3/4"
brick becomes:
Ifyouencounteranyproblemsorhavequestions
concerningtheinstallationorapplicationofthis
system, please contact your distributor. For the
name of your nearest distributor call:
brick
“R”M = rM x TS = 0.20 x 3 1/2" = .70
Using 1/2” of mortar to set the brick, “R” for
the mortar is calculated as follows:
mortar
3-5/16"
LHP
1110 West Taft Avenue
Orange, CA 92865
Max. Thickness Of Hearth Extension When
Fireplace Is On The Floor
“R”M = rM x TS = 0.20 x 1/2" = .10
Next, a 3/4" marble slab set in 1/2" mortar cov-
Figure 43
ers the brick, “R” for the marble and mortar
INSTALLATION COMPONENTS
becomes:
marble
Secure the hearth extension to the floor to
prevent possible shifting.
“R”M = rM x TS = 0.05 x 3/4" = .038
The following items are available for use in the
installation of this appliance.
mortar
“R”M = rM x TS = 0.20 x 1/2" = .10
FINISH TO YOUR TASTE
The sum of all “R values” is: .70 + .10 +. 038
+ .10 = .938
BlowerKitisinstalledas
a standard component
on model BCD36MH
(optional kit for model
BC36MH)
There are a wide variety of “finished looks” for
these fireplaces, from formal wall decor with
elaborate mantels to rustic wood paneling or
warm brick facings.
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.
Only noncombustible materials like stone, tile,
brick, etc., may overlap the black front facing.
Do not extend these materials beyond the black
facing and into the firebox area. Be sure not to
interfere with the installation and operation of
glass doors or block the upper or lower grilles.
Seal all joints between the black facing and
wall surrounds to prevent air intrusion. Use
noncombustible caulking material only to seal
the black metal facing to the surround material
on the finished wall.
Note: Also see NFI Certification Manuals for
expanded explanation on calculating “R val-
ues” when multiple materials are used.
WARNING
Forced Air Blower Kit
36L32
BFK36
The crack between the fireplace
andthehearthextensionmustbe
sealed with a noncombustible
material.
Combustible materials may project beyond the
sides of the fireplace opening as long as they
are kept within the shaded areas illustrated in
Figure 44.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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INSTALLATION COMPONENTS
Storm Collar
Storm Collar (12 pack) 94L77
63L59
FSC
FSC-B-12
Firestop Spacer (Flat) (Single Pack) 63L29
F8FS
F8FS-12
63L10
63L13
H0522
63L14
FTF8-12
FTF8-18
FTF8-24
FTF8-36
FTF8-48
Firestop Spacer (Flat) (12 Pack)
94L76
Chimney Section
63L15
19M55
19M56
63L38 (0-6/12)
F8F6MH
F8F12MH
F8F6
Stabilizer
63L25
FTF8-S4
Flashing
63L39 (6/12-12/12)
F8F12
Adjustable Chimney Pipe Kits
HO559
FM8-PK10
Ref. Form #750,080M
Locking Band
63L60
FLB
Adjustable Firestop/Thimble
HO325
FM8-AT1
Offset/ Return Package
30 Degree Offset/Return Elbow
15 Degree Offset/Return Elbow
FTF8-ES30
FTF8-OR15
63L22
63L28
Contemporary Termination -
Round
63L42
FTF8-CTD
Thimble Extension 26"
6" Duct
91L46
F8-TE26
Contemporary Termination -
Round, Black
H2238
FTF8-CTDP
Air Inlet Hood FOAK-6W
(optional)
Firestop Spacer (30°)
63L30
F8FS30
Floor Inlet Assembly
FOAK-6 (standard)
Outside Air Kit (optional)
Outside Air Kit (standard)
19M17
90L83
FOAK-6W
FOAK-6
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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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.
LHP
Printed in U.S.A. © 2006 by LHP
1110 West Taft Avenue
Orange, CA 92865
P/N 700,034M REV. A 03/2006
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