INSTALLATION
INSTRUCTIONS
CUSTOM SERIES
36" Wood Burning Fireplaces
P/N 700,009M REV. D 11/2003
MODELS
RD-36
RD-36-H
RDI-36
HC-36
HC-36-H
HCI-36
RDI-36-H
HCI-36-H
This installation manual will enable you to obtain a safe, efficient and
dependable installation of your fireplace system. Please read and under-
stand 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.
PLEASE RETAIN THIS MANUAL FOR FUTURE REFERENCE.
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WH Report No. J9902-5865C-231
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Note: Illustrations shown reflect “typical”
installations with nominal dimensions and
are for design and framing reference only.
Actual installations may vary due to indi-
vidual design preferences. However, always
maintain minimum clearances to combus-
tible materials and do not violate any specific
installation requirements.
PRECAUTIONS
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.
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.
These fireplaces have been tested and listed
by Warnock Hersey (Report No. J9902-
5865C-231) 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.
The most important areas of concern dealing
with the installation of factory-built fireplaces
areclearancestocombustiblematerials,proper
assembly of component parts, height of the
chimney system, the proper use of accesso-
ries supplied by the manufacturer and the
techniques employed in using finishing mate-
rials applied to the wall surrounding the fire-
place, hearthextensionsandwallshields. 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.
When complete these fireplace systems con-
sists of five basic “sub-systems”:
1. The Fireplace
2. The Chimney and Termination
3. The Optional Glass Doors
4. The Optional Combustion Air Kits
5. Optional Cold Climate Kit (Mandatory in
Canada).
These fireplaces have been tested for installa-
tion in Canada to ULC-S610. For installations
in Canada, the chimney clearance to com-
bustibles must be 2 inches and the Cold
Climate Kit must be installed.
CLEARANCES AND HEIGHT
REQUIREMENTS
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
requires a minimum 2" air space clearance to
combustibles. The fireplace outer wrapper
requires a minimum 1" air space clearance to
combustibles. A combustible mantle may be
installed12"abovetheopeningofthefireplaceas
per NFPA 211, Section 7-2.3.3. In Canada, the
minimum is 18" above the fireplace opening.
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
and in accordance with codes such as the
BOCA Basic/National Codes, the Standard Me-
chanicalCodeandtheUniformBuildingCodes.
INTRODUCTION
General Information
These fireplaces are conventional radiant heat
fireplaces with standard bar grates, optional
outside combustion air kits and optional deco-
rativeglassdoors. The"C"modelsaredesigned
as heat circulating fireplaces and may be fitted
with accessory fans.
TYPICAL INSTALLATION
The minimum installed height of the completed
fireplacesystemis15'0". Themaximumheight
is 60' 0".
The fireplace and chimney system must be
enclosed when installed in or passing through
alivingareawherecombustiblesorpeoplemay
come in contact with it. This is important to
prevent possible personal injury or fire hazard.
Blower Kit
(Optional)
Chimney and
Termination
Chimney and
Termination
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, 17 and 18 ).
Outside
CHIMNEY SYSTEM
Combustion
Air Kit
Outside
Combustion
Air Kit
(Optional)
These fireplaces are designed and code listed
for use with Security Chimneys FTF8 chimney
System only. Always use Security Chimneys
FTF8 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.
(Optional)
Radiant Model Shown
Figure 1
Circulating Model Shown
*Construction Materials:
• framing materials • paneling
• particle board
• millboard
• flooring
• dry wall
• etc.
• plywood
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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Insulate Joists
Chimney Height
LOCATION OF FIREPLACE
Same As Ceiling
The total height of your completed fireplace
system from the surface the fireplace rests on
to the chimney top must not exceed 60' and
mustalsomeetminimumheightrequirements.
Refer to the minimum system height chart.
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.
Draft Stops
Firestop
Minimum System Height
Security's FTF8 Pipe
Vertical Installation
One Offset
15' 0"
15' 0"
25' 0"
CTDT
Termination
Hearth
Hearth
Note: Non-
Combustible
Chase
Two Offsets
Flashing
Must Be
Used To
Cover
Chase Enclosure
Chase
A chase is a vertical box-like structure con-
structedtosurroundthefireplaceandchimney.
Refer to Figure 2 for a typical chase configura-
tion. As with all chimney installations, avoid
overhead obstructions such as trees, power
lines, etc. A chase should be constructed and
insulated just like any outside wall. In a cold
climate, we recommend the base of the chase
should also be insulated between the solid
continuous floor beneath the fireplace and the
chase bottom. Chase insulation in a cold cli-
mate installation is not required for safety.
Opening
Optional
Outside Chase
Figure 4
Optional
Insulation
In Outside
Walls Of
Chase
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.
8'
Level
Solid
Continuous
Surface
ASSEMBLY OUTLINE
Before You Start
Outside
Base
Insulation
Whenlocatingthefireplace,considerationmust
be given to combustibles and final finishing.
See Figure 5 and confine the final location of
combustiblefinishmaterialstothe"SafeZone".
(Thermal Barrier)
Check your inventory list to be sure you have all
the necessary parts supplied in good usable
condition.Checkalsoforanyconcealeddamage.
Figure 2
DO NOT permanently place furniture or other
items such as decorative pillows within 60" of
the fireplace front face.
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.
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.
Black Portion Of Frame
Not To Be Covered With
Combustible Materials
Wall
Covering
12”
45°
WARNING: DO NOT PACK OR FILL RE-
QUIRED AIR SPACES WITH INSULATION
OR OTHER MATERIAL. NO MATERIAL IS
ALLOWED IN THESE AREAS.
1”
Damper
Closed
Damper
Open
Door
Opening
Safe
Zone
Lintel
12”
Note: Do not insulate the chase cavity with
blown or fill type insulation materials.
Combustion
Air Actuator
Figure 5
Note: Local codes may not require firestopping
at the ceiling levels for outside chase installa-
tions. However, it is recommended for safety
and the reduction of heat loss.
Figure 3
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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1. Estimate the total weight of the fireplace
system including chimney and surround ma-
terials such as brick, stone, etc., to be in-
stalled. Shipping weights for the fireplace
may be found on page 18.
ASSEMBLY STEPS
Top Spacer
Note: The following steps represent the normal
sequence of installation. Each installation is
unique, however, and might require a different
sequence.
Maintain
1" (25 mm)
Air Space
At Back
And Sides
2. Measure the square footage of the floor
space to be occupied by the system, surrounds
and hearth extensions.
1. Position firebox prior to framing or into
prepared framing.
Hearth
3.Notethefloorconstruction,i.e.2x6’s,2x8’s
or 2 x 10’s, single or double joists, type and
thickness of floor boards.
2. Install the chimney system.
Extension
1" (25 mm) Space
3. Connect house wiring to the fireplace for
later attachment of optional blower.
Metal Safety Strip
Floor
4. Use this information and consult your local
building code to determine if you need addi-
tional support.
Note: Hearth extensions must not interfere with
circulating grillwork
4. Install optional 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/certi-
fied tradesman.)
Figure 6
CAUTION: DO NOT BLOCK THE HEAT-CIRCU-
LATING AIR INLET AND OUTLET PORTS ON
CIRCULATING MODELS. DOING SO MAY RE-
SULT IN A POTENTIAL FIRE HAZARD.
Maintain
1" (25 mm)
Air Space
At Back
6. Complete the installation, finish wall mate-
rial, surround and hearth extension to your
individual taste.
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.
And Sides
7. Assemble and attach optional glass door
assembly.
CLEARANCES
Study the three dimensional illustration (Fig-
ure 1 ) to get a general idea of each element of
your fireplace system.
Hearth
Extension
1" (25 mm) Space
Minimum clearance to combustibles for the
appliance is as follows: sides and back - 1" (25
mm), floor-0"(0mm), adjacentwall-12"(305
mm), ceiling - 37 ¹⁄₂" (953 mm).
PRE-INSTALLATION NOTES
Metal Safety Strip
Platform
Floor
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.
INSTALLING THE FIREPLACE
Note: Hearth extensions must not interfere with
circulating grillwork
Step 1. Slide the fireplace into prepared fram-
ing or position fireplace in its final position and
frame later.
Figure 7
Note: Install the hearth extension only as illus-
trated.
The fireplace may not be recessed into a com-
bustiblefloor.Maintainthefloortohearthclear-
ance established by the fireplace lower front
face.
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
wooden support is used to elevate the fireplace
abovethefloor,a“Z”typesafetystripshouldbe
fabricated and used to protect the front surface
ofthewoodsupportaswellasthefloorbeneath
the hearth extension (Figures 8 and 9 ). The
safety strips should be tacked down to prevent
possible movement.
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.
Step 2. Insert the provided metal safety strips,
beneaththefireplaceasillustrated(Figures6, 7
and 8 ). The safety strips should overlap ¹⁄₂" for
continual coverage of the floor.
Usually, no special floor support is needed for
the fireplace, however, to be certain:
Note: Safety strips are not required when fire-
place rests on a noncombustible surface.
Note: The “Z” type safety strip is not supplied.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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FIREPLACE SPECIFICATIONS
12 ¹⁄₂"
(318 mm)
9"
(229 mm)
16 ¹⁵⁄₁₆"
(428 mm)
1 ¹⁄₂"
Metal Safety Strips
36"
44 ¹⁄₄"
(1124 mm)
(914 mm)
20 ³⁄₁₆"
2 ⁷⁄₈"
(513 mm)
(73 mm)
Figure 8
7 ¹⁄₈"
(181 mm)
Blocking
41 ³⁄₄"
(1060 mm)
Front
Fireplace Top Spacer
Metal Safety Strips
Combustion
Air Inlet
9 ⁷⁄₈"
Figure 9
(251 mm)
Gas Line
Access
Step 3. Refer to fireplace drawings and specifi-
cationsonpages6and7forframingdimensions
and details. Frame appliance enclosure as illus-
trated in Figures 11 through 14 on page 8.
44 ¹⁄₄"
(1124 mm)
10 ¹⁄₈"
39 ³⁄₁₆"
(257 mm)
(995 mm)
36 ⁵⁄₁₆"
(922 mm)
Gas Line
Access
IMPORTANT: UNDER NO CIRCUMSTANCES
CAN THE FIREPLACE TOP SPACERS (FIGURE
10 ) BE REMOVED OR MODIFIED, NOR MAY
YOU NOTCH THE HEADER TO FIT AROUND OR
BE INSTALLED LOWER THAN THE SPACERS.
THE HEADER MAY BE IN DIRECT CONTACT
WITH THE TOP SPACERS BUT MAY NOT BE
SUPPORTED BY THEM.
17 ⁷⁄₁₆"
11 ⁷⁄₁₆"
(443 mm)
(290 mm)
Junction
Box
21 ⁵⁄₁₆"
20 ¹¹⁄₁₆"
(541 mm)
(525 mm)
Right Side
Left Side
Note: The framed depth, 21 ³⁄₄" (552 mm) 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 21 ³⁄₄" (552 mm) must be measured from
the drywall surface. It is important that this
dimension be exact.
28 ¹⁄₈"
(714 mm)
12 ¹⁄₂"
(318 mm)
8 ¹⁄₁₆"
(205 mm)
21 ⁵⁄₁₆"
(541 mm)
Fireplace
Top Spacer
If the appliance is to be elevated above floor
level, a solid continuous platform must be
constructed.
1"
41 ³⁄₄"
(1060 mm)
(25 mm)
The header may rest on the top metal spacers,
but must not be notched to fit around them.
43 ³⁄₄"
(1111 mm)
Top View
Consult all local codes.
Figure 10
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FRAMING SPECIFICATIONS
Framing Dimensions
A
B
C
D
E
F
G
H
J
43"
1092 mm
Back Wall of
Chase/Enclosure
Including Finising
Materials
FOAK Combustion
Air Kit - Optional
44 ¹⁄₂" 1130 mm
if any
29 ¹⁄₂"
15 ³⁄₄"
73"
749 mm
400 mm
1854 mm
927 mm
552 mm
527 mm
D
J
F
Header
36 ¹⁄₂"
21 ³⁄₄"
20 ³⁄₄"
A
E
Rough
Framing Face
(Unfinished Shown)
B
Corner Installation
51 ⁵⁄₈" 1311 mm
Figure 14
A
Note: All framing dimensions calcu-
lated for 1/2" dry wall at the fireplace
face. Ifsheathingthechaseorfinish-
ing with other thickness materials,
calculations will need to be made.
Fireplace Framing
Note: When Framing With 6” Studs Header Must
Be 17” (432mm) Higher. Use Security’s OR15
Offset/Return Elbow To Recess The Chimney Back
2 1/2” (64mm). Maintain Required Clearance To
Chimney At All Times.
Figure 11
Back Wall of Chase/Enclosure
FOAK Combustion
Air Kit
Including Finising Materials if any
Framing Dimensions for Ceiling
B
Flue Type
A
B
A
FTF8 Vertical
16 ¹⁄₂"
(419 mm) (419 mm)
16 ¹⁄₂"
G
Ceiling Framing
Figure 15
FTF8 Offset 30° 16 ¹⁄₂"
25"
A
H
(419 mm) (635 mm)
Rough
Framing Face
(Unfinished Shown)
Inside Chase
Figure 12
Back Wall of Chase/Enclosure
Including Finising Materials
if any
FOAK
Combustion
Air Kit - Optional
Framing Dimensions for Roof
C
Pitch
0/12
C
D*
16 ¹⁄₂"
(419 mm)
16 ¹⁄₂"
(419 mm)
G
H
C
6/12
16 ¹⁄₂"
(419 mm)
19"
(483 mm)
A
D
Rough
Framing Face
(Unfinished Shown)
Outside Chase
Roof Framing
12/12
16 ¹⁄₂"
23 ¹⁄₂"
(419 mm)
(597 mm)
Figure 13
Figure 16
* Perpendicular to roof ridge
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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 8d nails (Figure 17 ).
Step 6. Connect the 6" (102 mm) Class 0 air
duct provided by installer, to the duct collar on
the fireplace and secure with two (2) screws
from the kit’s hardware package.
Framing must maintain adequate minimum air
space clearance at all times.
CAUTION: ALLOW MINIMUM 2" CHIMNEY
AIRSPACETOCOMBUSTIBLEFRAMINGMEM-
BERS THROUGHOUT VERTICAL OR OFFSET
CHIMNEY INSTALLATION.
Step 7. Route the Class 0 air duct out the back
or side wall, up through the ceiling or floor
joists to an outside wall. The air inlet hood
should be located above snow level or above
any anticipated snow level, (Figure 19 ).
A minimum 2" air space must be reserved for
all combustible materials extending for any
continuous length surrounding the chimney.
Install As Shown With Opening
In Downward Position, Do Not
Block Entrance
Reference Figures 15 and 16 and charts Fram-
ing Dimensions for Ceiling and Roof, which
specify minimum ceiling and roof dimensions.
8d Nail
In new construction, to determine chimney cen-
terline,useplumblinefromrooforceilingabove
fireplace to center of flue collar on fireplace.
5 Foot Min. Height
From Outside
Ground Level
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 20 ). Then plumb from ceiling or
roof level directly above hole which has just
been completed.
Figure 17
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 19
Note: If the fireplace is installed against an
inside wall, the class 0 air duct may be ex-
tended into a ventilated attic space at least 18"
(475mm) above the attic floor. Secure the air
inlet hood to a vertical post with the inlet
positioned downward. Ensure that nothing
blocks the hood opening. This hood must
never terminate higher than three (3) feet
below the termination.
For Canadian Installations
A cold Climate Kit FTF8-CCK2-LD must be
installed. CCK2 kits are available from
FireCraft through your local dealer. Installer
must supply suitable length of 6" Diameter,
class "0" metallic air duct.
Proceed with Steps 5 through 8
Step 8. Cut or frame a hole through the outside
wall for the installation of the air inlet hood. A
6-1/2"diameterholeisrequired. Feedtheloose
end of the flexible duct through the hole and
attach to the collar on the air inlet hood using
two (2) screws from the kit's hardware pack-
age. Insert the hood into the opening. Secure
the inlet hood in place with nails driven through
the holes in the flange. Seal with noncombus-
tible waterproof silicon type caulking.
Step 5. Install the Cold Climate Kit to the
fireplace following the instructions provided
with the kit, (Figure 18 ).
Chimney
Duct
Figure 20
Install Screws
Step 3. Position appropriate firestop spacer at
ceiling and nail temporarily with two (2) 8d
nails. Use flat firestop spacer, Model F8FS-2, if
chimney penetrates ceiling vertically. If chim-
neypenetratesceilingat30°angle(offsetchim-
ney), use30° firestopspacer, ModelF8FS30-2.
Use one nail 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 adjust-
ments have been made. Firestop spacer must
be secured by at least four (4) 8d nails when
completely installed.
Duct
Collar
INSTALLING THE CHIMNEY SYSTEM
Step 1. Before continuing, check the operation
of the damper, as described on page 4, (refer to
Figure 3 ).
Front Cover
Side Cover
Plates
Step 2. Using standard construction framing
techniques,constructopeningforchimneyroute
upthroughtheceiling(s)androoforthroughan
outside chase.
Plate
Figure 18
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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 21 and 22 ).
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 26 ).
Room Above
F8FS30-2
2" Min.
Firestop Spacer
Air Space
Room Above
2" Min.
FTF8-S4 Stabilizer
Air Space
30° Firestop
10'
Max.
And Room Above
Figure 24
Firestop Spacer
For Canada Only
When installing the chimney system through
an open attic space, the attic shield assembly-
firestop spacer must be used (Figure 25 ). This
installation is required only for use in Canada.
Figure 21
Attic Above
Figure 26
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 27 ).
Open Attic Space
Firestop Spacer
Locking
Tabs
Figure 22
(Lances)
CHIMNEY 30° OFFSET THROUGH FLOOR
OR CEILING
Figure 25
Note: For Canadian installations, all chimney
installedoutsidethebuildingmustbeconstructed
with galvalume (outer sections only) effective
January 1, 1992. The appropriate model desig-
nations are located in the back of this manual.
Itmaybenecessarytoassemblethechimneyat
30° when passing through the floor or ceiling
area.UsetheF8FS30-2firestopspacerasshown
in Figures 23 and 24. Support the chimney at
floor or ceiling penetration with a FTF8 stabi-
lizer if distance of chimney below ceiling is 10'
or more. Maintain 2" minimum air space to
combustibles from chimney sections.
Figure 27
Note: Assemble one component of chimney at a
time (inner section first, then outer section last)
beforeproceedingwiththenextcompletesection.
Step4.Note:Chimneysectionsareconstructed
with a unique locking tab design, which en-
sures an immediate, tight assembly between
sections. Plan your chimney requirements
carefully before assembly as chimney is diffi-
cult to disassemble after installation. If disas-
sembled, 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 pen-
etrate the roof flashing openings (Figure 28 ).
Always maintain 2" minimum air space to com-
bustiblematerialsandalwayscheckeachchim-
ney joint (inner and outer) to ensure proper
engagement. Checkverticalalignmentofchim-
ney so that it projects from the roof in true
vertical position.
Attic Space
F8FS30-2
2" Min.
Firestop Spacer
Air Space
The Security 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 fire-
place. At all subsequent joints, the upper
flue section fits into the preceding flue sec-
tion. Each piece snaps together by means of
locking tabs (9 locking tabs per joint). Check
each piece by pulling up slightly from the top
to ensure proper engagement before installing
the next section.
FTF8-S4 Stabilizer
2" Min.
Air Space
10'
Max.
30° Firestop
And Attic Above
Figure 23
2" Min. Air Space
To Combustibles
Figure 28
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