Lennox Hearth EST-42, EST-50, EST-36 User Manual

Page 1

INSTALLATION INSTRUCTIONS

Estate Series 36"/42"/50" Wood-Burning Fireplaces

P/N 506023-11 Rev. E 06/2011

This manual is one of a set of three supporting this product. Refer to P/N 506025-04 for Care and Operation Instructions and P/N 750094M for detailed refractory panel placement instructions.

Ce manuel est disponible en francais, simplement en faire la demande. Numéro de la pièce 506223-17.

MODELS

EST-36 EST-42 EST-50*

WH Report No. J20054576-231

PFS Report No. 09-185

Please read and understand these instructions before beginning 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 ENSURE PROPER ALIGNMENT OF GLASS DOORS: INSTALL THIS FIREPLACE IN A SQUARE AND PLUMB CONDITION, USING SHIMS AS NECESSARY AT SIDES AND/OR BOTTOM.

*Note: Model EST-50 is not available in Canada.

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE.

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LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

TABLE OF CONTENTS

Packaging List ...................................page 2

SAFETY RULES ........................ page 2

Tools and Building Supplies ..............page 2

PRECAUTIONS ......................... page 3

Introduction ......................................page 3

Clearances/Height Requirements ......page 3

Chimney System ...............................page 3

Assembly Outline ..............................page 4

Location of Fireplace .........................page 4

Pre-Assembly Steps ..........................page 5

Pre-Installation Notes .......................page 5

Clearances ........................................page 5

Assembly Steps ................................page 5

Installing the EST-50 Outer

Transition Assembly ......................page 6

Installing the Fireplace ......................page 9

Fireplace Specications .....................page 10

Framing Specications ......................page 11

Installing the Chimney System ..........page 12

Ten Foot Rule Summary ....................page 14

Multiple Terminations........................page 15

Chimney Component Calculations ....page 15

Special Offset Instructions ................page 15

Offset Calculations ............................page 16

Vertical Elevation Chart ....................page 17

Offset Elevation Chart ........................page 17

Installing Offsets ...............................page 18

30° Chimney Offset through

Floor/Ceiling ..................................page 18

Installing the Refractory Panels ........page 18

Optional Equipment Considerations ..page 19

• Outside Combustion Air Kits .........page 19

• Glass Doors ..................................page 19

Gas Line Connection .........................page 20

Vent Free Appliances .........................page 20

Cold Climate Insulation .....................page 20

Fireplace Finishes ..............................page 20

• Mantels and Trim ..........................page 20

• Hearth Extensions/Wall Shields ....page 21

Finish Requirements .........................page 23

Shipping Weights ..............................page 23

Installation Components ...................page 24

PACKAGING LIST

Included with all models:

• (1) Fireplace Assembly

• (1) Metal Safety Strip Assembly

• (1) Grate Assembly

• (2) Grate Brackets

• (2) Pull Screen Panels (Mesh Firescreens)

• (2) Screen Rods

• Hardware

Also included with EST-36 and EST-42 models:

• (2) Refractory Clips

Also included with EST-42 models:

• (2) Front Refractory Retainers (LH & RH)

Also included with EST-50 models:

• (1) Outer Transition Assembly

• (1) Inner Collar Assembly

• (1) Damper Link

SAFETY RULES

IMPORTANT: PLEASE READ AND

UNDERSTAND THESE RULES TO

FOLLOW FOR SAFETY.

1. Before starting replace installation, read

these installation instructions carefully to be sure you understand them completely and in

entirety. Failure to follow them could cause a

ﬁreplace malfunction resulting in serious injury and/or property damage.

2. Always check your local building codes. The installation must comply with all local, regional, state and national codes and regulations.

3. The Estate™ Series 36" and 42" models may be installed with Security Chimneys™

FTF10 [10" (250mm) inside diameter] chimney

systems. The Estate Series 50" model may only be installed with Security Chimneys™

FTF13 [13" (330mm) inside diameter] chimney

system. These systems are intended for use in any application where a traditional masonry type ﬁreplace would apply. The chimney system must always vent to the outside of the building.

4. To ensure a safe ﬁreplace system and to prevent the build-up of soot and creosote, inspect and clean the ﬁreplace and chimney prior to use and periodically during the heating season.

5. Use solid fuel only. DO NOT use chemical chimney cleaners or ﬂame colorants in your ﬁreplace.

Never burn treated construction lumber or scraps. These woods burn excessively hot and may contain chemicals used to treat insects and fungus. When burned, these chemicals can pose a signiﬁcant hazard.

6. DO NOT use charcoal or coal under any

circumstances.

7. NEVER use gasoline, gasoline-type lantern fuel, kerosene, charcoal lighter ﬂuid, or similar liquids to start or “freshen up” a ﬁre in this

replace. Keep any ammable liquids at safe

distance from the ﬁreplace.

8. NEVER leave children unattended when there is a ﬁre burning in the ﬁreplace.

9. Always keep ﬂue damper open when heat is present in the ﬁreplace.

10. Before servicing, allow the replace to cool.

Always shut off any electricity or gas to the ﬁreplace while working on it. This will prevent any possible electrical shock or burns.

11. This ﬁreplace is not intended to heat an entire home or be used as a primary heat source. It is designed to ensure homeowner comfort by providing supplemental heat to the room.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

12. Always ensure that an adequate supply of replacement combustion air from the outside of the house is accessible to the ﬁre to support

normal combustion. Fireplaces consume large

volumes of air during the normal combustion process.

If the home is tightly sealed with modern energy efﬁcient features, the optional combustion air kit may not provide all the air required to support combustion. The manufacturer is not responsible for any smoking or related problems that may result from the lack of adequate combustion air. It is the responsibility of the builder/ contractor to ensure that adequate combustion air has been provided for the ﬁreplace.

13. DO NOT use a ﬁreplace insert or any other products not speciﬁed herein by the manufacturer for use with this ﬁreplace. All gas log sets must be operated with the damper clamped open, including unlisted “vent-free” log sets. Listed “vent-free” log sets may be operated with the damper closed.

14. “Smoke free” operation is not warranteed nor are we responsible for inadequate system draft caused by mechanical systems, general construction conditions, inadequate chimney heights, adverse wind conditions and/or unusual environmental factors or conditions beyond our control.

15. Never, under any circumstances, install a ﬁreplace, chimney component or any accessories, that has visible or suspected physical damage as a result of handling or transportation. These items should be inspected by your distributor or qualiﬁed factory representative to

ensure safe condition. When in doubt, consult

your distributor.

16. For additional safety considerations and

complete operating instructions, refer to the Care and Operation Manual provided with the ﬁreplace.

TOOLS AND BUILDING SUPPLIES NORMALLY REQUIRED

Tools required: Phillips screwdriver Measuring tape Electric drill and bits Hammer Plumb line Pliers Saw and/or Sabersaw Square Level

Additional tools for EST-50 installation: 5/16" and 1/4" nut driver Two 7/16" wrenches

Building supplies required: Framing materials Wall nishing materials

Caulking materials (noncombustible)

Fireplace surround and hearth extension materials (noncombustible)

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LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

PRECAUTIONS

Note: These ﬁreplace systems are not difﬁcult to install. However, in the interest of safety, it is recommended that the installer be a qualiﬁed or certiﬁed “tradesman” familiar with commonly accepted ﬁreplace installation and safety techniques as well as prevailing local codes.

The most important areas of concern dealing with the installation of factory-built ﬁreplaces are clearances to combustible materials, proper assembly of component parts, height of the chimney system, the proper use of accessories supplied by the manufacturer and the techniques employed in using ﬁnishing materials applied to the wall surrounding the ﬁreplace, hearth

extensions and wall shields. Each of these topics

will be covered in thorough detail throughout this manual. Please give each your special attention as you progress with your installation.

IMPORTANT NOTES:

• WHEN INSTALLING IN CANADA (EST-36 AND EST-42 ONLY), THE COLD CLIMATE KIT MUST BE INSTALLED PER THE WARNOCK HERSEY LISTING (see Step 6 on page 12

and “Installation Components” on page 24.

• THE MINIMUM AIR SPACE TO COMBUSTIBLES FOR THE CHIMNEY SYSTEM IS 2" (51mm).

• THE FTF13 CHIMNEY SYSTEM IS NOT FOR USE IN CANADA. MODEL EST-50 IS NOT FOR USE IN CANADA.

Chimney and

Termination

INTRODUCTION General Information

These ﬁreplaces are conventional radiant heat ﬁreplaces with standard bar grates, optional outside combustion air kits and optional decorative glass doors.

Note: Illustrations 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.

Models EST-36 and EST-42 have been tested and listed to U.L. 127 standard for U.S. installations and U.L.C. S610 standard for Canadian

installations by Warnock Hersey Inc. (Report No. J20054576-231). Model EST-50 has been

tested and listed to U.L. 127 standard for U.S.

installations by PFS-US (Report No. 09-185)

for EST-50.

These units are intended for installation in residential homes and buildings of conventional construction, not in mobile homes.

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 Mechanical Code, Uniform Building Codes and/or the

Canadian National Code.

WARNING

Failure to use manufacturerprovided parts, variations in techniques and construction materials, or practices other than those described in this manual may create a ﬁre hazard and void the limited warranty.

When complete, these replace systems consist

of ﬁve basic “sub-systems”:

1. Fireplace

2. Chimney and Termination

3. Optional Glass Doors

4. Optional Combustion Air Kit

5. Chimney Collar Enclosure Kit (Canada only)

CLEARANCES AND HEIGHT REQUIREMENTS

The ﬁreplace may be placed on or near normal construction materials.* The combustion air kit, ﬁrestop spacer and roof ﬂashings (not chase ﬂashings) may be placed directly on or against normal construction materials.* The chimney requires a minimum 2" (51 mm) air space to combustibles. A combustible mantel may be

installed a minimum of 12" (305 mm) above the opening of the replace as per NFPA 211,

“Mantel/Trim Clearances” Section. In Canada the minimum is 24" (610 mm) above the opening.

The ﬁreplace and chimney system must be enclosed when installed in or passing through a living area where combustibles or people may come in contact with it. This is important to prevent possible personal injury or ﬁre hazard.

For questions, please call your distributor or

the manufacturer. Special restrictions apply to the front and facing of the ﬁreplace and nearby walls (see pages 20 and 21).

Optional Position

for Cold Climate Kit

(Canada Only)

Outside

Combustion

Air Kit

(Optional)

Figure 1: Typical Installation

Cold Climate Kit (Canada Only)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

CHIMNEY SYSTEM

These ﬁreplaces are designed and code listed for

use with Security Chimneys FTF10 and FTF13

chimney System only. Always use Security Chimneys FTF10 and FTF13 chimney components with these ﬁreplaces. Do not modify or alter these components as this may cause a

potential serious hazard and void the Warranty.

*Construction Materials:

 •framingmaterials  •paneling  •particleboard  •ooring  •drywall  •plywood  •noncombustibleinsulationboard

(for hearth)

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LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

Hearth

Optional Outside Chase

Insulate Joists Same as Ceiling

Draft Stops

F10FS-2 Firestop

FTF10-CTDTM Termination

Note: NonCombustible Chase Flashing Must be Used to Cover Chase Opening

Insulation (Thermal Barrier)

Figure 2

8’

(2.4m)

Level

Typical Installation

Optional Insulation in Outside Walls of Chase

Solid Continuous Surface

Outside Base

Note: Do not insulate the chase cavity with blown or ﬁll type insulation materials.

CHIMNEY HEIGHT

The total height of your completed ﬁreplace system from the surface the ﬁreplace rests on to the

chimney top must not exceed 80' (24.4m) and

must also meet minimum height requirements. Refer to the minimum system height chart.

Minimum System Height

Security Chimneys™ FTF10 & FTF13 Pipe

Installation

Vertical 16' 0" (4.8m) 17' 6" (5.3m)

One Offset 18' 6" (5.6m) 20' 0" (6.1m)

Two Offsets 22' 0" (6.7m) 25' 0" (7.6m)

EST-36 &

EST-42

EST-50

Chase Enclosure

A chase is a vertical box-like structure constructed to surround the ﬁreplace and chimney. Refer to Figure 2 for a typical chase conﬁguration. 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 climate installation is not required for safety.

ASSEMBLY OUTLINE - Before You Start

Damper

OPEN

Lintel

EST-36 & EST-42

Combustion Air Actuator

Damper CLOSED

Damper

CLOSED

Lintel

Figure 3

LOCATION OF FIREPLACE

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.

Damper OPEN

Combustion Air Actuator

EST-50

WARNING

If insulation is used, the ﬁreplace must not be placed directly against it. Insulation or vapor barriers, if used, must ﬁrst be covered with gypsum board, plywood, particle board or other material to assure insulation and vapor barriers remain in place.

WARNING

Do not pack or ﬁll required air spaces with insulation or other material. No material is allowed in these areas.

Note: Local codes may not require ﬁrestopping at the ceiling levels for outside chase installations; however, it is recommended for safety and the reduction of heat loss.

Check your inventory list to be sure you have all the necessary parts supplied in good usable condition. Check also for any concealed damage.

Check the operation of the damper. The damper is controlled through the use of a control lever

located within the rebox opening at the top center just behind the rebox lintel (Figure 3).

EST-36 and 42 models: To lock the damper blade in the OPEN position, push the damper handle back and up (away from the front of the ﬁreplace). To lock the damper blade in the CLOSED position, pull the damper handle

FORWARD and DOWN (toward the front of

the ﬁreplace).

EST-50 model: To lock the damper blade in the OPEN position, pull the damper handle

FORWARD and DOWN (toward the front of

the ﬁreplace). To lock the damper blade in the CLOSED position, push the damper handle back and up (away from the front of the ﬁreplace).

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Figure 4

Carefully consider the position of the ﬁreplace opening with respect to the location of adjacent

or nearby stairwells, bath or kitchen exhaust

fans and/or return air registers for forced air furnaces/air conditioners that could cause a smoking ﬁreplace condition if the house is tightly insulated.

When locating the replace, consideration must

be given to combustibles and ﬁnal ﬁnishing. See Figure 5 and conﬁne the ﬁnal location of combustible ﬁnish materials to the “Safe Zone.”

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LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

Black Portion Of Frame

Not To Be Covered With

Combustible Materials

Wall

4-3/4”

15°

1/2”

Door

Opening

18”

Covering

Safe

Zone

Figure 5

NOTE: Do NOT permanently place furniture or other items such as decorative pillows within 60" of the ﬁreplace front face.

PRE-ASSEMBLY STEPS

EST-50: Install the outer transition assembly

before installing the ﬁreplace. See “Installating the EST-50 Outer Transition Assembly” (next page).

EST-36 and EST-42: See Figure 6, below.

Remove all items packed under the grate and set aside for later installation. Cut the two wire ties securing the grate, and discard the ties. Remove the grate, and set aside for later installation. Using a 1/4" nut driver, remove the two

tie brackets from the rebox oor, and discard the tie brackets.

PRE-INSTALLATION NOTES

The ﬁreplace may be installed directly on a combustible ﬂoor or raised on a platform of an appropriate height. Do not place ﬁreplace on carpeting, vinyl or other soft ﬂoor coverings. It may, however, be placed on ﬂat wood, plywood, particle board or other hard surfaces.

Be sure replace 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.

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.

Usually, no special ﬂoor support is needed for the ﬁreplace, however, to be certain:

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 23.

2. Measure the square footage of the ﬂoor space to be occupied by the system, surrounds and

hearth extensions.

3. Note the oor 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 additional support.

Cut the wire ties holding the grate to the ﬁrebox ﬂoor, and remove the grate.

Use a 1/4" nut driver to remove the screws from the tie brackets.

Discard wire ties and tie brackets after removal.

Wire Ties and Tie Brackets

Grate

Front Refractory Retainers

(EST-42 only)

Screen Rods

CAUTION: DO NOT BLOCK THE HEAT-CIRCULATING AIR INLET AND OUTLET PORTS ON CIRCULATING MODELS. DOING SO MAY RESULT IN A POTENTIAL FIRE HAZARD.

If you plan to raise the ﬁreplace and hearth

extension, build the platform assembly, then position replace and hearth extension on

top. Secure the platform to the ﬂoor to prevent possible shifting.

CLEARANCES

Minimum clearance to combustibles for the Estate ﬁreplace is as follows; sides and back – 1" (25.4 mm), combustible ﬂoor – 0" (0 mm), adjacent wall 18" (457 mm), adjacent shielded wall (K factor of .84 or less 24" W x 36" H) 12"

(305 mm), ceiling – 37-1/2" (953 mm).

Note: Clearance at the nailing ﬂange for both ﬁreplace models is 0" (0mm).

Note: Adjacent wall considerations are for an adjacent wall on only a single side. Walls should not be placed at minimum distance at both sides of the ﬁreplace.

ASSEMBLY STEPS

Note: The following steps represent the normal sequence of installation. Each installation is unique, however, and may require a different sequence.

1. Position rebox prior to framing or into

prepared framing.

2. Install Cold Climate Kit (Canada only).

3. Install the chimney system.

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ed

tradesman.)

6. Complete the installation; ﬁnish wall mate-

rial, surround and hearth extension to your

individual taste.

7. Assemble and attach optional glass door assembly.

See Figure 1 on page 3 for a general idea of each element of the ﬁreplace system.

Figure 6: EST-36 and EST-42 Assembly

Wire (Mesh) Firescreens

Literature and Hardware

Grate Brackets

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

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LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

INSTALLING THE EST-50 OUTER TRANSITION ASSEMBLY

This section contains instructions for attaching the outer transition assembly on the EST-50 rebox. The transition assembly parts are shipped inside the EST-50 rebox (Figure A- 1 , below) and are not available as separate kit or accessory items.

Inner Transition

Outer Transition Assembly

Lennox Hearth Products Estate™ Series EST-50 ﬁrebox assembly, as shipped, with outer transition assembly packed inside ﬁrebox.

Figure A-1

Step 1. Remove outer transition assembly from ﬁrebox.

1.1. See Figure A-2, below. Using a 1/4" nut driver, remove the two

screws securing the outer transition to the rebox (one screw on

each side).

1.3. With the other hand, grasp the top of the outer transition and pull

forward (Figure A-4, below).

1.4. When the top of the transition is outside the rebox, let go of the

damper handle, and use both hands to lift the entire transition

assembly out of the rebox.

Figure A-4

Step 2. Remove all items from ﬁrebox.

2.1. See Figure A-5, below. Remove the box, damper link, screen rods,

and mesh ﬁrescreens, and set aside for later installation.

2.2. Cut the two wire ties securing the grate to the rebox.

2.3. Using a 1/4" nut driver, remove the screws from the brackets under

the grate. Discard the wire ties and brackets.

2.4. Remove the grate from the rebox, and set aside for later installation.

Figure A-2

1.2. With one hand, hold the damper handle back (Figure A-3, below).

Damper Handle

Figure A-3

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Inner Transition Collar (hardware bag underneath)

Grate Brackets

Grate

Mesh Firescreens

Damper Link and Screen Rods

Figure A-5

Cut and discard wire ties. Use 1/4" nut driver to remove screws from brackets.

(continued on next page)

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LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

INSTALLING THE EST-50 OUTER TRANSITION ASSEMBLY

(continued from previous page)

Step 4. Attach damper link to damper bracket on inner transition collar.

4.1. Turn the inner transition collar upside down, and attach the damper

link to the damper bracket with the enclosed 1/4-20 bolt and nut, as shown in Figure A-6, below.

Damper Link

Damper Bracket

Step 5. Attach damper assembly to inner transition ﬂange.

5.1. See Figure 8, below. Insert the damper link through the inner

transition ﬂange, and then place the inner transition collar over the inner transition ﬂange.

Damper Assembly:

Inner Transition Collar Damper Link

Inner Transition Flange

Firebox Front

Figure A-8

[DETAIL]

Inner Transition Collar

(upside down)

Figure A-6

4.2. Using two 7/16" wrenches, tighten the nut completely (Figure

A-7, below).

4.3.

After tightening the nut, loosen it 1/2-turn.

5.2. See Figure A-9, below. Align the notch in the rear of the inner

transition collar with the dimple in the rear of the inner transition.

5.3. Using a rubber mallet, gently tap the damper assembly (at the top

of the inner transition collar) until all screw holes align.

Inner Transition Collar (rear)

Align notch and dimple.

Inner Transition (rear)

Figure A-9

5.4. See Figure A-10, below. Using a 5/16" hex head nut driver, secure

the damper assembly with the ve (5) provided zinc-plated #10 x 3/8"

screws.

Figure A-7

Figure A-10

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

(continued on next page)

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LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

WARNING

SINGLE-PERSON LIFT COULD CAUSE INJURY. USE ASSISTANCE WHEN MOVING OR LIFTING.

LIFTING HAZARD.

INSTALLING THE EST-50 OUTER TRANSITION ASSEMBLY

(continued from previous page)

Step 6. Attach damper link to damper handle.

6.1. Attach the damper link to the factory-installed bolt on the damper

handle with one supplied nut, as shown in Figure A-11, below.

NOTE: Use the additional supplied nut. (Do NOT remove the existing factory-installed nut from the damper handle.)

6.3. Using two 7/16" wrenches, tighten the nut completely; then loosen

1/2-turn.

Damper Link

Inner Transition Collar (with Damper)

Damper Link

Damper Handle

(See DETAIL, at right.)

Supplied Nut

(After installing, loosen 1/2-turn.)

Damper Handle with factory-installed Bolt and Nut

(Do not remove.)

[DETAIL]

7.2. See Figure A-13, below. While tilting one of the front standoffs

forward, slide the front ﬂange of the outer transition under the rear holes of the standoff, and align the screw holes.

7.3. Repeat Step 7.2 for the other front standoff.

Outer

Transition

(Front)

Front Standoff

Slide transition ﬂange under rear holes of standoff.

Figure A-11

6.4.

BEFORE installing the outer transition, make

sure the damper assembly works properly.

The damper should freely move to a fully closed and fully open position without interference, and the damper should remain fully closed when latched. Refer to page 2 of the Care and Operation Instructions (P/N 506025-04 ) for details on proper damper operation.

Step 7. Install outer transition.

7.1. Using at least two people, lift the outer transition into place, as

shown in Figure A-12, below.

Figure A-13

7.4. See Figure A-14, below. Attach fourteen (14) of the provided screws

to secure the outer transition.

Note:

• Make sure the lower ﬂange of the outer transition is UNDER the rear holes of each front standoff.

• The hardware bag contains more screws than are required for installation.

Figure A-14

Figure A-12

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

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LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

Combustible Wall

Metal Safety Strip

Hearth Extension

Floor

Platform

(25mm)

INSTALLING THE FIREPLACE

Step 1. Slide the ﬁreplace into prepared fram-

ing or position ﬁreplace in its ﬁnal position and frame later.

Step 2. Insert the metal safety strips, packaged with the ﬁreplace, beneath the ﬁreplace, as illustrated in Figures 7-1 and 7-2, below). The safety strips should overlap 1" (25 mm) for continual coverage of the ﬂoor.

Note:

• Safety strips are not required when ﬁreplace rests on a noncombustible surface.

• Install the hearth extension only as illustrated.

Combustible Wall

Zero Clearence to Rear and Side Spacers

Metal Safety Strip

Hearth

(25mm)

Figure 7-1

Extension

Floor

The safety strips should extend from front and

sides of the ﬁreplace 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

oor beneath the hearth extension (see Figures 8 and 9, below). The safety strips should be

tacked down to prevent possible movement.

Note: The “Z” type safety strip is not supplied.

(51mm)

Metal Safety Strips with 1" (25mm) Overlap

Figure 8

Blocking

Platform

Step 3. Refer to ﬁreplace drawings and speci ﬁcations on pages 10 and 11 for framing

dimensions and details. Frame appliance

enclosure as illustrated in Figures 12 through 15 on page 11.

IMPORTANT:

• NEVER REMOVE OR MODIFY THE FIREPLACE TOP SPACERS UNDER ANY CIRCUMSTANCES.

• NEVER NOTCH THE HEADER TO FIT AROUND THE SPACERS.

• NEVER INSTALL THE HEADER LOWER THAN THE SPACERS.

• THE HEADER MAY BE IN DIRECT CONTACT WITH THE TOP SPACERS BUT MAY NOT BE SUPPORTED BY THEM.

Step 4. Fireplace may be anchored to oor.

Bend down four (4) anchor tabs located at the

base of the ﬁreplace and secure to the ﬂoor by nailing with 8d nails (Figure 10, below).

Anchor Tab

Figure 7-2

Figure 9

(51mm)

Special Z Metal Safety Strips with 1" (25mm) Overlap

Figure 10

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 10

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

15" O.D.

FIREPLACE SPECIFICATIONS

(381 mm)

Front View

Note: Outside air kit

installs on RIGHT side for EST-50.

Left Side

Right Side

Figure 11

Model No.

EST-36 & EST-42

EST-50

Model No.

EST-36 & EST-42

EST-50

Top View

Unit

A B C D E F G H

42-9/16 47-7/8 28-9/16 37-1/4 11 66-1/16 47-1/8 36 (EST-36) / 42 (EST-42)

in.

1081 1216 725 946 279 1678 1197 914 (EST-36) / 1067 (EST-42)

53-1/4 59-1/2 29-5/8 44-5/8 14-1/4 84 61-7/8 50

in.

1353 1511 753 1133 362 2134 1572 1270

J K L M N P Q R

in.

(EST-36) / 3 (EST-42)

737 152 (EST-36) / 76 (EST-42) 267 222 330 305 178

36 4-3/4 15 10 10-5/8 11-1/8 8-1/2

914 121 381 254 270 283 216

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

10-1/2 8-3/4 13 12 7

6-9/16

167

8-9/16

218

Page 11

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

Back Wall of Chase/Enclosure

FRAMING SPECIFICATIONS

NOTE:

• The framed depth from a framed wall (item “G” in the Framing Dimensions table

below) must always be measured from a ﬁnished surface. If a wallcovering (such as drywall) is to be attached to the rear wall, measure the framed depth from the drywall surface. This dimension MUST be exact.

• If the appliance is to be elevated above oor

level, a solid, continuous platform must be constructed.

• The header may rest on the top metal

spacers; however, NEVER notch the header to ﬁt around the spacers.

• Consult all local codes.

FOAK-4

Figure 15

Corner Installation

Including Finishing Materials if any

A E

Framing Face

(Unfinished Shown)

Rough

Fireplace Framing

Figure 12

FOAK-4 Air Kit

Rough Framing Face (Unfinished Shown)

Outside Chase

Figure 13

FOAK-4

Air Kit

Rough Framing Face (Unfinished Shown)

Header

False Header

Including Finishing Materials

Inside Chase

if any

Framing Dimensions EST-36 and EST-42 EST-50 A 48 in (1219 mm) 60-3/4 in (1543 mm) B

47-1/4 in (1200 mm) 62-1/4

B2 66-1/2 C 37-1/4 D 18-5/8 E 94-7/8 F 47-7/16 G 28-13/16 J 11-3/8 K 67

in (1689 mm) in (946 mm) in (473 mm) in (2410 mm)

in (1205 mm)

in (732 mm)

in (289 mm)

in (1702 mm)

Flue Type A B

FTF10 & 13 19" 19"

Vertical (483 mm) (483 mm)

FTF10 & 13 19" 29" 30° Offset (483 mm) (737 mm)

Ceiling Framing

*Perpendicular to roof ridge

Figure 16Figure 14

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Figure 17

in (1581 84-1/2 in (2146 44-5/8 in (1133 22-5/16 in (567 104-1/8 in (2645 52-1/16 in (1322 29-3/4 in (756 10 in (254 73-5/8 in (1870

Pitch C D* 0/12 19" 19"

(483 mm) (483 mm)

6/12 19" 22"

(483 mm) (559 mm)

12/12 19" 27"

(483 mm) (686 mm)

mm) mm) mm)

mm)

mm) mm) mm)

mm)

Roof Framing

Page 12

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

Firestop Spacer

Room Above

Firestop Spacer

Attic Above

(Optional

Position)

Cold Climate Kit

(Canada only)

Step 5. Secure the ﬁreplace to the side framing members using the nailing ﬂange. Use 8d nails or equivalent (Figure 18).

Nailing

Flange

Framing

Stud

8d Nail

Figure 18

Note: The nailing ﬂange and the area directly

behind the nailing ﬂange are exempt from the clearances described on page 5.

Maintain the following minimum clearance from the ﬁrebox wrapper to the framing at the closest point of contact, directly adjacent to the ﬂange:

• EST-36 and EST-42: 1/2" min.

• EST-50: 3/4" min.

For installations in Canada, continue with Steps 6 through 9, below.

Step 6. Remove one of the knockouts from the ﬁreplace transition and attach the 4" (102 mm)

collar from the Cold Climate Kit to the transition with four (4) No. 8 x 1/2" screws provided (Fig-

ure 19, below). See “Installation Components” on page 24 for catalog/part numbers.

Note: If the ﬁreplace is installed against an inside wall, the Class 0 air duct may be extended into a ventilated attic space at least 18" (457 mm) above the attic ﬂoor. Secure the duct hood to a vertical post with the inlet positioned downward. Ensure nothing blocks the hood opening. This air duct must never terminate higher than the chimney.

Step 9. Cut or frame hole through the outside wall for the installation of the duct inlet hood. A 4-1/2" (114 mm) diameter hole is sufﬁcient.

Feed the loose end of the exible duct through

the hole cut for the inlet hood and attach to

collar on inlet hood using two (2) No. 6 x 3/8"

screws provided. Insert hood into opening.

Secure hood in place with the No. 8 x 1-1/2"

screws provided or with nails driven through holes in hood ﬂange. Seal with noncombustible waterproof silicon type caulking. If additional duct is needed, use Class 0 metallic duct.

INSTALLING THE CHIMNEY SYSTEM

Step 1. Before continuing, check the operation

of the damper, as described on page 4, (refer to Figure 3).

Step 2. Using standard construction framing techniques, construct opening for chimney route up through the ceiling(s) and roof or through an outside chase.

Framing must maintain adequate minimum air

space clearance at all times.

CAUTION: ALLOW MINIMUM 2" CHIMNEY AIR SPACE TO COMBUSTIBLE FRAMING MEMBERS THROUGHOUT VERTICAL OR OFFSET CHIMNEY INSTALLATION.

Plumb Line

Figure 20

Step 3. Position appropriate ﬁrestop spacer at ceiling and nail temporarily with two (2) 8d

nails. Use at restop spacer, Model F10FS-2, if

chimney penetrates ceiling vertically. If chimney

penetrates ceiling at 30° angle (offset chimney), use 30° restop spacer, Model F10FS30-2 (refer to “30° Chimney Offset through Floor or Ceiling” and Figures 42 and 43 on

page 18). 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 adjustments have been made.

Firestop spacer must be secured by at least four

(4) 8d nails when completely installed.

Note: If there is a room above ceiling level, ﬁrestop spacer must be installed on the bottom side of the ceiling. If an attic is above ceiling level, ﬁrestop spacer must be installed on top side of ceiling joist (Figures 21 and 22).

Step 7. Connect the 4" (102 mm) Class 0 air

duct to the collar with two (2) No. 8 x 1/2"

screws provided in the hardware kit.

Step 8. Route the Class 0 air duct out the back wall or side wall, up through the ceiling or ﬂoor joists to an outside wall. The air duct should be located above snow level.

Figure 19

A minimum 2" air space must be reserved for all combustible materials extending for any continuous length surrounding the chimney.

For minimum ceiling and roof dimensions, see Figure 16 (Ceiling Framing) and Figure 17 (Roof Framing) on the previous page.

In new construction, to determine chimney center line, use plumb line from roof or ceiling above ﬁreplace to center of ﬂue collar on ﬁreplace.

For remodeling, plumb to center of ue 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.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Figure 21

Figure 22

Page 13

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

FTF8-S4 Stabilizer

2" (51mm) Min. Air Space to Combustibles

FTF10 Chimney

FTF10 Flashing

Flashing Spacers

Do Not Seal

For Canada Only

When installing the chimney system through

an open attic space, the attic shield assemblyﬁrestop spacer must be used (Figure 23). This installation procedure is listed and approved

by Warnock Hersey, Inc., and only required

for use in Canada.

Open Attic Space

Figure 23

Step 4. Note: Chimney sections are constructed with a unique locking tab design, which ensures an immediate, tight assembly between sections. Plan your chimney requirements carefully before assembly as chimney is difﬁcult to disassemble after installation. If disassembled, the tabs might

become damaged. Be certain tabs are properly

formed to ensure locking tabs engage properly.

Security Chimneys™ FTF10 and FTF13 chimney systems are 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 pulling up slightly from the top to ensure proper

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 24).

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 25).

Locking Tabs (Lances)

Figure 25

Note: Assemble one component of chimney at

a time (inner section ﬁrst, then outer section last) before proceeding with the next complete section.

Continue to assemble the chimney up through framed opening. Assemble just enough to penetrate the roof ﬂashing openings (Figure

26). Always maintain 2" minimum air space to combustible 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.

Figure 26

Chimney sections from Security Chimneys do not need to be screwed together. Additional reinforcement is not necessary except in certain offset conditions (refer to Figure 38 on page 16).

Install the Model FTF10-S4 stabilizer by tting

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 27).

Figure 27

Note: Do not apply excessive pressure to any

subsequent chimney sections following the stabilizer when installing. Ensure each subsequent chimney section is securely attached by testing as noted in Step 4.

Step 6. Select the proper Security Chimneys roof ﬂashing based on pitch of roof. Use chart below for selection:

Roof Pitch Model

Flat to 6/12 F10F6

6/12 to 12/12 F10F12

Next, slide roof ashing over extended chimney

section that previously has been installed above

the roof opening in Step 4. FTF10 ashings

require ﬂashing spacers. Slide ﬂashing 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" minimum air space to combustibles.

Figure 24

Step 5. The height of vertical chimney pipe supported only by the ﬁreplace must not

exceed 30'. Chimney heights above 30' must be supported by a Model FTF10-S4 stabilizer, installed at 30' intervals.

Note: The Model FTF10-S4 adds 3" net effective height to the total chimney system.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Figure 28

Note: Do not caulk or seal the ventilating

openings.

Page 14

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

Locking Band

Waterproof

Caulk

Roof Ridge

FTF10-CT2RS Termination

2" (51mm) Min.

Air Space to

Combustibles

Studs

Above Roof

20"

(508mm)

Step 7. Secure ﬂashing by nailing along the perimeter into roof using 8d nails. If shingled roof, slide upper end and sides of roof ﬂashing under shingles (trim if necessary), seal the top and both sides of the ﬂashing to the roof with roof caulking. Cover nail heads with roof caulking (Figure 29).

Figure 29

Step 8. The standard Security Chimneys™

FTF10 roof ashing assemblies include a storm

collar. Slide the storm collar over outer chimney, rest on ﬂashing spacers 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. Also add

extra roof caulking to the tab/slot area to seal

completely against water penetration (Figure

30). Check all joints very carefully to ensure no

water intrusion can take place.

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 triangular pattern (Figure 31 ). Guy wires are not supplied by the manufacturer.

120°

Figure 31

Step 10. Using the FTF10-CTDTM (36" & 42" models) and FTF13-CTD (50" models) Round Termination:

1. Hold termination over top of last chimney

section (Figure 32).

2. Center inner slip section in inner ﬂue pipeslip down.

3. Center outer locking section over outer ﬂue pipe. Push down until locking tabs are ﬁrmly engaged.

Figure 33

Note: It is recommended that all exterior

exposed related metal ﬁreplace components; such as terminations, ﬂashings, storm collars and/or ﬂue be painted with a premium-quality, high-temperature, rust-preventative paint designed for metal. This is especially important when installations are made in abnormally adverse or corrosive environments; such as near lakes, oceans or in areas with consistently high-humidity conditions. Consult the paint manufacturers instructions for proper preparation and application.

For Canadian installations, all chimney installed

outside the building must be galvalume (outer sections only), effective January 1, 1992. The appropriate model designations (with a “C”

sufx) are located in the back of this manual.

TEN-FOOT RULE SUMMARY

Figure 30

Step 9. Security Chimneys 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 joints equally covering the joints of both pipe sections.

Use the nut provided and TIGHTEN snugly. Do not overtighten as this might damage the chimney section (refer to Figure 30).

4. Pull up slightly on termination to ensure locking joint has ﬁrmly engaged.

(FTF10-CTDTM shown FTF13-CTD Similar)

Figure 32

Using a CT2 Chase Termination

Refer to speciﬁc installation instruction included with the CT2 chase termination for clearance statements and installation details.

The minimum chimney height above the roof and/or to adjacent walls and buildings is speciﬁed by all major building codes.

If the horizontal distance from the peak of

the roof is less then 10' (3 m), the top of the chimney must be at least 2' (610 mm) above

the peak of the roof.

If the horizontal distance from the chimney

edge to the peak of the roof is more than 10' (3 m), a chimney height reference point is established on the roof surface 10' (3 m) hori-

zontally 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 than 3' (914 mm) above the roof

at the edge of the chimney.

The 2' in 10' rule is necessary in the interest

of safety, but does not ensure smoke-free operation. Trees, buildings, adjoining roof lines, adverse wind conditions, etc., may require a taller chimney should the ﬁreplace not draft properly (see Figure 35).

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 15

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

18"

(457mm)

18"

(457mm)

24"

(610mm)

MULTIPLE TERMINATIONS

If more than one termination is located in the same chase or within the same general proximity, we suggest they should be separated in distance at least 24" (610 mm) horizontally from ﬂue center to ﬂue center and stacked or staggered vertically at least 18" (457 mm) apart,

from the termination of one smoke exit to the termination of another smoke exit (Figure 34).

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.

CHIMNEY COMPONENT CALCULATIONS

The minimum installed height of the completed

replace system is 16'0" (4.8 m) for 36" and 42" models and 17'6" for 50" models. The maximum system height is 80'0" (24.38 m).

To determine the number of chimney sections and chimney components required, follow these steps:

Less Than 10' (3m)

CTDTM

Shown

2' Min. (610mm) 2' Min. (610mm)

Figure 35

Note: Both CTD and CTDTM terminations shown for illustration purposes. Use appropriate termination for the fireplace model installed.

1. Determine total vertical height of the ﬁreplace installation. This dimension is the distance from the surface the ﬁreplace sets on to the point where

smoke exits from the termination.

2. Determine the number of chimney compo-

nents required, except chimney sections. This

would include ﬁrestop spacers, stabilizers, roof ﬂashing, etc.

3. The effective heights of the components are

listed below.

Fireplace Effective Heights

EST-36 & EST-42 = 65-1/4" (1657 mm)

EST-50 = 84" (2134 mm)

Pipe Effective Heights

FTF10/13-12 = 10-1/4" (260 mm)

FTF10/13-18 = 16-1/4" (413 mm)

FTF10/13-36 = 34-1/4" (870 mm)

Termination Effective Heights

FTF10-CTDTM = 10" (254 mm)

FTF10/FTF13-CT2 = 15" - 23"

(381 - 584 mm)

FTF13-CTD = 4" (102 mm)

FTF13-CTDT = 12" - 18"

(305 - 457 mm)

FTF13-CT1 = 12" - 18"

(305 - 457 mm)

Stabilizer* Effective Heights

S4 Stabilizer = 3" (76 mm)

__________

*Stabilizer is required for every 30' (9.1 m) of vertical chimney and/or 10' (3.03 m) of

offset chimney.

2' Min.

(610mm)

3' Min.

(916mm)

4. Determine amount of chimney height required by subtracting total combined height of all preselected components (ﬁreplace and chimney components from total desired height.)

Reference Vertical Elevation Chart and determine the number of chimney sections (quantity and length) required.

SPECIAL OFFSET INSTRUCTIONS

To clear any overhead obstructions, you may

offset your chimney system using Security's 30°

offset and return elbows. Use two elbows - an offset elbow to initiate the offset and a return

elbow to terminate it. A 30° offset elbow, angling

in any direction, may be the ﬁrst component used off the top of the ﬁreplace ﬂue collar.

The offset and return elbows may be attached together, or a section or sections of chimney

may be used between, but must not exceed 20'

(6.1 m) in total length between elbows (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 elbows are used, the maximum combined length of chimney used between elbows cannot exceed 20' (6.1 m) (Figure 37). Example: If C1 = 10' (3

m) then C2 cannot exceed 10' (3 m).

If an offset exceeds 6' (1.8 m) in length, each chimney joint beyond the rst 6' (1.8 m) of

offset to the return elbow, must be secured by

a No. 8 x 1/2" sheet metal screw located at the

underside of the joint (Figure 38).

A 1/8" (13 mm) diameter hole must be drilled in the chimney joint using a 1/8" (13 mm)

diameter drill. Hole should be drilled in center of joint overlap (Figure 39 ). Be sure to drill only through the outer chimney casting. Do not puncture the inner ﬂue.

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 22' (6.7 m) (Figure 42).

Return elbow support straps must be securely attached under tension (in shear) to structural framing members above. Do not substitute a

FTF10-30 or FTF13-30 offset elbow in place of a FTF10-E30 or FTF13-ES30 return elbow.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 16

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

Stabilizer

20’ Max.

(6m)

10’ Max.

(3m)

FTF10 Chimney

Joints

No. 8 x 1/2" SMS

Screws Required at

Every Joint Past 6’

No Screw

s Required in

Joints for First 6’ of

Offset

4’ (1.2m)

6’ (1.8m)

Underside of Chimney

FTF10-E30* Return Elbow

FTF10 Chimney Section (s)

FTF10-30* Offset Elbow

65-1/4"

(1657mm)

* Part of Offset/Return Package, Model FTF10-ES30

OFFSET CALCULATIONS

Step 1. Use Offset Chart to determine amount of

horizontal offset (A) and height (B) for various

chimney section assemblies.

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.

Step 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 21 and 22 and stabilizers as shown in Figure 27.

Figure 38

Figure 36

Figure 39

Figure 37

Figure 40

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 17

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

FTF10 AND FTF13 VERTICAL ELEVATION CHART

Height Of Number Of Chimney Only Chimney Lengths

Inches Feet/Inches 12" 18" 36"

11 0 11 1 0 0

17 1 5 0 1 0

21 ¹⁄₄ 1 9 ¹⁄₄ 2 0 0

27 ¹⁄₄ 2 3 ¹⁄₄ 1 1 0

33 ¹⁄₄ 2 9 ¹⁄₄ 0 2 0

35 2 11 0 0 1

37 ¹⁄₄ 3 1 ¹⁄₄ 2 1 0

43 ¹⁄₄ 3 7 ¹⁄₄ 1 2 0

51 ¹⁄₄ 4 3 ¹⁄₄ 0 1 1

55 ¹⁄₄ 4 7 ¹⁄₄ 2 0 1

61 ¹⁄₄ 5 1 ¹⁄₄ 1 1 1

67 ¹⁄₄ 5 7 ¹⁄₄ 0 2 1

69 ¹⁄₄ 5 9 ¹⁄₄ 0 0 2

79 ¹⁄₄ 6 7 ¹⁄₄ 1 0 2

85 ¹⁄₄ 7 1 ¹⁄₄ 0 1 2

89 ¹⁄₂ 7 5 ¹⁄₂ 2 0 2

95 ¹⁄₂ 7 11 ¹⁄₂ 1 1 2

103 ¹⁄₄ 8 7 ¹⁄₄ 0 0 3

113 ¹⁄₂ 9 5 ¹⁄₂ 1 0 3

119 ¹⁄₂ 9 11 ¹⁄₂ 0 1 3

Height Of Number Of Chimney Only Chimney Lengths

Inches Feet/Inches 12" 18" 36"

123 ³⁄₄ 10 3 ³⁄₄ 2 0 3

129 ³⁄₄ 10 9 ³⁄₄ 1 1 3

137 ¹⁄₂ 11 5 ¹⁄₂ 0 0 4

147 ³⁄₄ 12 3 ³⁄₄ 1 0 4

153 ³⁄₄ 12 9 ³⁄₄ 0 1 4

158 13 2 2 0 4

164 13 8 1 1 4

171 ³⁄₄ 14 3 ³⁄₄ 0 0 5

182 15 2 1 0 5

188 15 8 0 1 5

192 16 0 2 0 5

198 16 6 1 1 5

206 17 2 0 0 6

215 ³⁄₄ 17 11 ³⁄₄ 1 0 6

222 18 6 0 1 6

226 ¹⁄₄ 18 10 ¹⁄₄ 2 0 6

232 ¹⁄₄ 19 4 ¹⁄₄ 1 1 6

240 20 0 0 0 7

250 ¹⁄₄ 20 10 ¹⁄₄ 1 0 7

256 ¹⁄₄ 21 4 ¹⁄₄ 0 1 7

Height Of Number Of Chimney Only Chimney Lengths

Inches Feet/Inches 12" 18" 36"

260 ¹⁄₂ 21 8 ¹⁄₂ 2 0 7

266 ¹⁄₂ 22 2 ¹⁄₂ 1 1 7

274 ¹⁄₄ 22 10 ¹⁄₄ 0 0 8

284 ¹⁄₂ 23 8 ¹⁄₂ 1 0 8

290 ¹⁄₂ 24 2 ¹⁄₂ 0 1 8

294 ³⁄₄ 24 6 ³⁄₄ 2 0 8

300 ³⁄₄ 25 0 ³⁄₄ 1 1 8

308 ¹⁄₂ 25 8 ¹⁄₂ 0 0 9

318 ³⁄₄ 26 8 ³⁄₄ 1 0 9

324 ³⁄₄ 27 0 ³⁄₄ 0 1 9

328 ³⁄₄ 27 4 ³⁄₄ 2 0 9

334 ³⁄₄ 27 10 ³⁄₄ 1 1 9

342 ³⁄₄ 28 6 ³⁄₄ 0 0 10

352 ³⁄₄ 29 4 ³⁄₄ 1 0 10

358 ³⁄₄ 29 10 ³⁄₄ 0 1 10

363 30 3 2 0 10

369 30 9 1 1 10

376 ³⁄₄ 31 4 ³⁄₄ 0 0 11

387 32 3 1 0 11

393 32 9 0 1 11

FTF10 AND FTF13 OFFSET ELEVATION CHART

Height Of Number Of Chimney Only Chimney Lengths

Inches Feet/Inches 12" 18" 36"

397 ¹⁄₄ 33 1 ¹⁄₄ 2 0 11

403 ¹⁄₄ 33 7 ¹⁄₄ 1 1 11

411 34 3 0 0 12

421 ¹⁄₄ 35 1 ¹⁄₄ 1 0 12

427 ¹⁄₄ 35 7 ¹⁄₄ 0 1 12

431 ¹⁄₂ 35 11 ¹⁄₂ 2 0 12

437 ¹⁄₂ 36 5 ¹⁄₂ 1 1 12

445 ¹⁄₄ 37 1 ¹⁄₄ 0 0 13

455 ¹⁄₂ 37 11 ¹⁄₂ 1 0 13

461 ¹⁄₂ 38 5 ¹⁄₂ 0 1 13

465 ¹⁄₂ 38 9 ¹⁄₂ 2 0 13

471 ¹⁄₂ 39 3 ¹⁄₂ 1 1 13

479 ¹⁄₂ 39 11 ¹⁄₂ 0 0 14

489 ¹⁄₂ 40 9 ¹⁄₂ 1 0 14

495 ¹⁄₂ 41 3 ¹⁄₂ 0 1 14

499 ³⁄₄ 41 7 ³⁄₄ 2 0 14

505 ³⁄₄ 42 1 ³⁄₄ 1 1 14

513 ¹⁄₂ 42 9 ¹⁄₂ 0 0 15

523 ³⁄₄ 43 7 ³⁄₄ 1 0 15

529 ³⁄₄ 44 1 ³⁄₄ 0 1 15

A B Number of A B Offset Height Offset/Return FTF10-S4 Chimney Sections Offset Height

(Inches) (Inches) Elbow Set Stabilizer 12" 18" 36" (mm) (mm)

4 15 ³⁄₄ 1 0 0 0 0 102 400

9 24 ¹⁄₂ 1 0 1 0 0 229 622

12 29 ³⁄₄ 1 0 0 1 0 305 756

14 ¹⁄₄ 33 ¹⁄₂ 1 0 2 0 0 362 851

17 ¹⁄₄ 38 ¹⁄₂ 1 0 1 1 0 438 978

20 ¹⁄₄ 43 ³⁄₄ 1 0 0 2 0 514 1111

21 45 ¹⁄₄ 1 0 0 0 1 533 1149

22 ¹⁄₄ 47 ¹⁄₂ 1 0 2 1 0 565 1207

25 ¹⁄₄ 52 ¹⁄₂ 1 0 1 2 0 641 1334

26 ¹⁄₄ 54 ¹⁄₄ 1 0 1 0 1 667 1378

28 ¹⁄₄ 57 ³⁄₄ 1 0 0 3 0 718 1467

29 ¹⁄₄ 59 ¹⁄₄ 1 0 0 1 1 743 1505

31 ¹⁄₄ 63 1 0 2 0 1 794 1600

32 ¹⁄₂ 65 1 0 4 1 0 826 1651

34 ¹⁄₄ 68 ¹⁄₄ 1 0 1 1 1 870 1734

36 ¹⁄₄ 71 ³⁄₄ 1 0 3 0 1 921 1822

37 ¹⁄₄ 73 ¹⁄₄ 1 0 0 2 1 946 1861

38 ¹⁄₄ 75 1 0 0 0 2 972 1905

39 ¹⁄₄ 77 1 0 2 1 1 997 1956

41 ¹⁄₂ 80 ¹⁄₂ 1 0 1 4 0 1054 2045

43 ¹⁄₄ 83 ³⁄₄ 1 0 1 0 2 1099 2127

A B Number of A B Offset Height Offset/Return FTF10-S4 Chimney Sections Offset Height

(Inches) (Inches) Elbow Set Stabilizer 12" 18" 36" (mm) (mm)

44 ¹⁄₂ 85 ³⁄₄ 1 0 3 1 1 1130 2178

45 ¹⁄₄ 87 ¹⁄₂ 1 0 0 3 1 1149 2223

46 ¹⁄₄ 89 1 0 0 1 2 1175 2261

48 ¹⁄₄ 91 ¹⁄₂ 1 0 2 0 2 1226 2324

49 ¹⁄₂ 94 ¹⁄₂ 1 0 1 5 0 1257 2400

51 ¹⁄₄ 97 ³⁄₄ 1 0 1 1 2 1302 2483

54 ¹⁄₄ 103 1 0 0 2 2 1378 2616

55 ¹⁄₄ 104 ¹⁄₂ 1 0 0 0 3 1403 2654

56 ¹⁄₂ 106 ¹⁄₂ 1 0 2 1 2 1435 2705

59 ¹⁄₂ 111 ³⁄₄ 1 0 1 2 2 1511 2838

62 ¹⁄₂ 116 ³⁄₄ 1 1 1 0 3 1588 2965

65 ³⁄₄ 122 1 1 0 1 3 1664 3099

67 ³⁄₄ 125 ¹⁄₂ 1 1 2 0 3 1721 3188

69 ³⁄₄ 128 ¹⁄₂ 1 1 1 3 2 1772 3264

70 ³⁄₄ 130 ³⁄₄ 1 1 1 1 3 1797 3321

73 ³⁄₄ 136 1 1 0 2 3 1873 3454

75 ³⁄₄ 139 ¹⁄₂ 1 1 2 1 3 1924 3543

79 ³⁄₄ 146 ¹⁄₄ 1 1 1 0 4 2026 3715

81 148 ¹⁄₄ 1 1 3 1 3 2057 3766

82 ³⁄₄ 151 ¹⁄₂ 1 1 0 1 4 2102 3848

87 ³⁄₄ 160 ¹⁄₄ 1 1 1 1 4 2229 4070

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 18

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

Return Elbow

F10FS30-2 Firestop Spacer

FTF10-S4 Stabilizer

30 Degree Firestop And Room Above

10’

Max.

Room Above

2" Min.

Air Space

2" Min.

Air Space

INSTALLING OFFSETS

First, review the Offset Elevation Chart on the

previous page and Figure 40 on page 16 for reference.

Step 1. Determine the offset distance where chimney is to pass through the ﬁrst ceilingdimension “A.” To ﬁnd this point on your ceiling, ﬁrst determine the center point for a vertical chimney following the instructions for vertical installation.

Measure height to the ceiling from the top of

replace-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.

Step 2. Proceed by using the Straight Up Installation Instructions for cutting and framing ceiling and roof openings.

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.

Offset Elbow Assembly

Offset elbows install the same as chimney

sections. First, snap the inner section INTO the

preceding inner section of ﬂue. Check connection by pulling up slightly to ensure a tight ﬁt.

Next, the outer sections snap lock OVER the

preceding outer section of chimney. Again, check outer section by pulling up slightly to ensure proper connection is made.

Return Elbow Assembly

Return elbows install the same way as round terminations and stabilizers:

Step 1. Hold return elbow over top of last chimney section.

Step 4. Pull up slightly on return elbow to ensure locking joint has ﬁrmly engaged.

Step 5. Secure support straps to framing members by nailing under tension in sheer (Figure 41).

Figure 41

Note: The return elbow assembly performs the

same function as a stabilizer. Consider this when determining the need for a stabilizer.

Note: Do not apply excessive pressure to any subsequent chimney section following return elbow assembly when installing. Ensure that each subsequent chimney section is securely attached by testing as noted above.

30° CHIMNEY OFFSET THROUGH FLOOR OR CEILING

It may be necessary to assemble the chimney

at 30° when passing through the oor or ceiling area. Use the F10FS30-2 restop spacer

as shown in Figures 42 and 43. Support the chimney at ﬂoor or ceiling penetration with a

FTF10 stabilizer if distance of chimney below ceiling is 10' or more. Maintain 2" minimum air

space to combustibles from chimney sections.

Attic Space

F10FS30-2 Firestop Spacer

2" Min.

Air Space

Figure 43

INSTALLING THE REFRACTORY PANELS

All Estate Series refractory panels are shipped in a separate pallet from the ﬁreplace.

WARNING: Lifting Hazard. Installation of the refractory panels requires at least two people.

WARNING

LIFTING HAZARD.

SINGLE-PERSON LIFT COULD CAUSE INJURY. USE ASSISTANCE WHEN MOVING OR LIFTING.

NOTE: The side panels have a gas line knockout located near the center bottom of each panel. Make sure the side panels are properly oriented, with the knockout at the bottom of each panel.

To install the refractory panels, follow the detailed instructions provided with the ﬁreplace (P/N 750094M).

After positioning the panels, the grout lines and gaps between the panels may be optionally mortared (mortar not included). Apply

wet mortar mix to the panels with a rubber tile trowel. Work into the gaps and grout lines; and then remove excess mortar with a wet sponge.

Step 2. Center inner slip section into inner ﬂue

pipe-slip down.

Step 3. Center outer-locking section over outer chimney pipe. Push down until locking joint has ﬁrmly engaged.

2" Min.

Air Space

10’

Max.

FTF10-S4 Stabilizer

30 Degree Firestop And Attic Above

Figure 42

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Note: Application of mortar to grout lines and gaps is not required.

Page 19

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

OPTIONAL EQUIPMENT CONSIDERATIONS

Outside Combustion Air Kits

The installation of an outside combustion air kit is highly recommended. It is very important to ensure good ﬁreplace operation in homes which are tightly weather sealed or have ventilating appliances installed.

Outside air drawn into the ﬁreplace supplies air to the ﬁre for combustion. Only one combustion air duct is necessary if installed.

Use combustion air kit, Model FOAK-4 or Model FOAK-4LD, with the Estate Series replaces.

Refer to installation instructions packed with the air kit for speciﬁc installation information. The outside air kit must be installed before the ﬁreplace is framed and enclosed in the ﬁnished walls.

Refer to the installation instruction packed with each air kit for speciﬁc installation information. The outside air kit, if used, must be installed before the ﬁreplace is totally framed and enclosed within the ﬁnished walls.

OPEN

If additional length of duct is necessary, purchase locally available U.L. Class 0 or Class 1

metallic duct. The duct may extend up to 50'

(15.24 m) in any direction.

Note: When installing the air duct vertically, Do NOT terminate the duct closer than 3' (914mm) below the chimney top. The maximum height for the outside air duct is 50 feet above the hearth.

CAUTION: NEVER LOCATE INLET WHERE IT CAN BE BLOCKED BY SHRUBS, SNOW DRIFTS, ETC. NEVER LOCATE INLET IN GARAGE OR ANY AREA WHERE THERE IS ANOTHER FUEL-BURNING APPLIANCE OR PRODUCTS EMITTING COMBUSTIBLE GASES SUCH AS PAINT, GASOLINE, ETC., IN COLD CLIMATES IT IS RECOMMENDED THE COMBUSTION AIR DUCT BE INSULATED.

After completing the installation of the optional combustion air vent system, the actuator arm must be put in service and tested to ensure proper operation before completing any enclo-

sure around the rebox. Failure to do so may result in extensive and costly rework.

To operate, locate the hand operated shut-off lever at the lower right side of the ﬁreplace opening behind the screen (refer to Figure

44). To open the air damper, turn upwards. To close, turn down.

Outside combustion air ducting may be run upwards or vertically through framing and ceiling joists, with the hood installed through

an outside wall and 3' (914 mm) below the

termination. Ducting may also be run downward through ﬂoor joists and under the home to a ventilated crawlspace not considered part of the living area of the home.

Note: Do NOT terminate combustion air kit in attic space under any circumstances.

Glass Doors

If glass doors are to be installed on these ﬁreplaces, refer to speciﬁc installation instructions packed with the glass doors. Use only the doors that are listed for use with these ﬁreplaces. Use of other non-listed glass door on these ﬁreplaces may constitute a potential ﬁre hazard and is not recommended.

CAUTION: CERTAIN GLASS DOORS OVERLAP THE BLACK METAL FACING OF THE FIREPLACE. IF THE FIREPLACE HAS BEEN FACED WITH NONCOMBUSTIBLE MATERIALS, THERE MIGHT NOT BE SUFFICIENT CLEARANCE TO INSTALL THE GLASS DOORS OF YOUR CHOICE. ENSURE ADEQUATE CLEARANCE IS MAINTAINED AT ALL TIMES SO AS NOT TO INTERFERE WITH THE INSTALLATION AND OPERATION OF GLASS DOORS.

EST-50 shown

(EST-36 and EST-42 on left side)

Figure 44

CLOSED

Operate the actuator through several cycles. Ensuring proper operation and freedom of movement. Return the actuator arm to the closed position.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 20

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

GAS LINE CONNECTION

The Estate Series ﬁreplaces have been approved to accept a 1/2" (13 mm) gas line for an approved gas appliance. Always have the appliance installed by a qualiﬁed, licensed plumber in accordance with all local building codes. The gas line may enter either side of the ﬁreplace.

CAUTION: PLUMBING CONNECTIONS SHOULD ONLY BE PERFORMED BY A QUALIFIED, LICENSED PLUMBER. MAIN GAS SUPPLY MUST BE OFF WHEN PLUMBING GAS LINE TO FIREPLACE OR PERFORMING SERVICE.

If you’re installing a gas line, connect it before the

ﬁreplace is framed and enclosed in the ﬁnished wall. The gas knockout is determined by a 1-1/8" (29 mm) round indentation located at the bottom and slightly off center in the side refractories.

THE KNOCKOUT IS ALWAYS REMOVED FROM INSIDE THE FIREPLACE. DO NOT REMOVE THE KNOCKOUT UNLESS YOU ARE INSTALLING A GAS LINE. If removal is attempted from the

outer wrapper, side-refractory damage may

occur. With a 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 insulation in the gas line channel.

Install a 1/2" (13 mm) gas supply line through

ﬁreplace wall for connection to a decorative

gas appliance inside the rebox. Outside, the

gas supply line connects to a gas shut-off valve recessed ﬂush into the wall or ﬂoor. The valve should be controlled by a removable valve key for safety.

Always plumb gas line installation per local codes. Check all connections with soap suds; leaks will bubble. Never test any gas line connection with a match or open ﬂame.

IMPORTANT: RE-PACK INSULATION MATERIAL IN SQUARE HOLE AROUND GAS LINE; INTERIOR AND EXTERIOR, TO SEAL.

This provision is intended only 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.

Install in accordance with the National Fuel Gas Code, ANSI Z223.1. This complies with

the revised U.L. 127 standard.

Vent Free Appliances

These units have been tested and approved to ANSI/IAS/AGA Z21.11.2 for use with unvented gas appliances and complies with the standard

for Factory-Built replaces, UL 127.

The unit has been tested for use with any unvented

gas log sets having a maximum rating of 40,000 BTU. The minimum mantel congurations are

outlined in Figures 45 and 46.

These ﬁreplaces have been marked with a

maximum rating of 40,000 BTU to assure that homeowners do not exceed the allowable limits

for all allowed installations of mantels.

NEVER INSTALL AN UNVENTED GAS LOG SET WITH A BTU GREATER THAN 40,000.

COLD CLIMATE INSULATION

If you live in a cold climate, it is especially important to seal all cracks around the ﬁreplace opening with noncombustible material and wherever cold air could enter the room. Surrounding materials must be caulked where it meets the black metal facing of the ﬁreplace to avoid cold air intrusion. Use noncombustible caulking material only on ﬁreplace facing to seal. Also, the outside air inlet duct should be wrapped with noncombustible insulation to minimize the formation of condensation. Do not place insulation materials against chimney sections.

Note: A 2" (51 mm) air space must be preserved for all combustible materials extending for any continuous length adjacent to the chimney.

It is especially important to insulate between the studs of an outside chase cavity and under the ﬂoor if the ﬂoor is above ground level. Do not place insulation directly against the ﬁreplace or chimney system.

FIREPLACE FINISHES

Mantels and Trim

In Canada, the minimum height for a combustible mantel is 24" (610 mm) above the ﬁreplace opening (EST-36 and EST-42 only). Figure 45 shows a typical Canadian installation.

NOTE: The EST-50 is not for use in Canada.

In the U.S., combustible mantels and trim may be installed as shown in Figure 46 as per

NFPA 211-Mantel/Trim Clearances. 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.

Facing Flush

Fireplace Opening

Finished Wall

Noncombustible Wall Covering

Spacer

Finished Wall

1-1/2" (38mm)

Noncombustible Wall Covering

Spacer

EST-36 & EST-42:

6-9/16" (167mm)

EST-50:

10" (254mm)

Fireplace Opening

Combustible Mantel

24" Min.

(610mm)

Figure 45

Combustible Mantel and Trim

Figure 46

8" Max.

(203mm)

Canadian Installation

Typical Canadian Installation

(36 and 42 models only)

(EST-36 and EST-42 only)

12"

(305mm)

Max.

12"

(305mm)

Min.

Typical U.S. Installation

CAUTION: WHEN USING THE DECORATIVE GAS APPLIANCE, THE FIREPLACE DAMPER MUST BE SET IN THE FULLY OPEN POSITION.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 21

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

Models

EST-36

EST-42

EST-50

A B C D

20"

(508mm)

20"

(508mm)

20"

(508mm)

36"

(914mm)

42"

(1066mm)

50"

(1270mm)

Figure 47

Hearth Extensions and Wall Shields

A hearth extension must be installed with all

ﬁreplaces. Its purpose is twofold: 1) to protect a combustible ﬂoor in front of the ﬁreplace from both radiant heat and sparks; and 2) to

distinguish the prescribed hearth extension area

from other unprotected surfaces.

The hearth extension must extend beyond the

front at least 20" (508 mm) and both sides at

least 12" (305 mm) (Figure 47). Use a hearth extension constructed of a durable noncombus-

tible material having an equal or better (lower k

value) insulating value of k = .84 BTU IN/FT2 HR °F or a thermal resistance that equals or exceeds r = 1.19 HR °F FT2/BTU IN. With these values,

determine the minimum thickness/material required using the formulas shown at right.

When using multiple materials, see the next page.

Note: Any noncombustible material whose k value is less than .84 or whose r value is more than 1.19 is acceptable.

If the ﬁreplace is installed on a combustible ﬂoor, use the metal safety strips (provided) on

the oor extending half under the replace and half under the hearth extension.

A wall shield is required where a continuous perpendicular side wall is within 12" of the ﬁreplace opening (Figure 48 ). Use a 36" W

x 36" H wall shield constructed of a durable,

noncombustible material having an equal or better (lower k value) insulating value than

k = .54 BTU IN/FT2 HR °F. At no time may a

perpendicular side wall be located closer than 9" from the ﬁreplace opening.

If replace is installed diagonally across a 90°

corner; no wall shields are required.

12"

(305mm)

12"

(305mm)

12"

(305mm)

60"

(1524mm)

60"

(1524mm)

74"

(1880mm)

Methods of Determining Hearth Extension and Wall Shield Equivalents

To determine the thickness required for the alternate material, use the “k formula” when the “k” value is known, and use the “r formula” when the “r” value is known.

= k value per inch of alternate material

= r value per inch of alternate material

= minimum thickness required for alternate material

= standard thickness of the alternate material

= k value per inch of listed material

= r value per inch of listed material

= minimum thickness of listed material

EXAMPLE: What is the minimum required thickness when using Micore 160 for the

replace hearth extension?

NOTE: An asterisk (*) indicates a value taken from Table 1 (next page).

Using the “k formula” (when the “k” value is known):

Minimum

thickness of =

alternate

material (T

(inches) =

*.84

.416 (inches) = .416 x 1"

ANSWER: The minimum required thickness of the Micore 160 is .417";

therefore, round up to nearest standard thickness available, which is 1/2".

Using the “r formula” (when the “r” value is known):

Minimum r-value (per inch) Speciﬁed min. thickness of = of listed material x thickness alternate material

(inches) =

TM (inches) = *1.19 x 1"

k-value (per Inch) of alternate material (k

k-value (per inch)

)

of listed material (k

r-value (per inch) of alternate material

of listed

)

M x T

*.84

*.35

x 1"

of listed

material

L x T

*2.86

Speciﬁed min.

)

x thickness

material (T

)

.416 (inches) = .416 x 1"

ANSWER: The minimum required thickness of the Micore 160 is .417";

therefore, round up to nearest standard thickness available, which is 1/2".

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 22

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

Wall Shield Required if less than 18" (457mm)

40"

(1016mm)

40"

(1016mm)

LISTED MATERIAL

k (per inch) r (per inch) Listed Min.Thickness

Listed Material .84

1.19 r

APPROVED ALTERNATE MATERIALS FOR FLOOR/HEARTH PROTECTION**

Alternate Materials Thermal Values

MinimumThickness

(rounded to nearest 1/8 inch)

k (per inch)

r (per inch)

Min. Thickness

Kaowool M Board .47 2.13 .56" (1/2")

Micore 160™

U.S. Gypsum

Micore 300™

U.S. Gypsum

Durock™ Cement Board

U.S. Gypsum

.35 2.86 .42" (3/8")

.46 2.17 .55" (1/2")

1.92 .52 2.29" (2-1/4")

Hardibacker™ 1.95 .513 2.32" (2-3/8")

Hardibacker 500™ 2.30 .435 2.74" (2-3/4")

Cultered Stone

2.82 .355 3.36" (3-3/8")

Hearthstone™

Wonderboard 3.23 .31 3.85" (3-7/8")

Super Firetemp M

Johns-Manville

Super Firetemp L

Johns-Manville

.61 1.64 .73" (3/4")

.54 1.85 .64" (5/8")

Face brick 9.00 .111 10.71" (10-3/4")

Common brick 5.00 .20 5.95" (6")

Cement mortar 5.00 .20 5.95" (6")

Ceramic tile 12.5 .08 14.88" (14-7/8")

Marble 11 .09 13.10" (13-1/8")

Table 1

**If the material intended to be used for the hearth extension is not listed in the above table, the material can still be used if it is noncombustible. To calculate the minimum required hearth thickness (per the instructions on this and the previous page and/or as speciﬁed in the NFI Certiﬁcation manuals), the material manufacturer must provide either the listed k-value per inch or r-value per inch with listed thickness.

NOTE: Also see NFI (National Fireplace Institute) Certiﬁcation Manuals for other acceptable calculation methods and acceptable alternate materials that can be used.

Figure 48

Calculating Minimum Thickness if Multiple Materials are Used

At times it is important to know what combination of materials are acceptable for use as ﬂoor protection. The “R values” are used to determine acceptable combinations of materials because “R values” are additive where r and k values are not.

“R value” = 1/k = “r” x thickness of material used

Example: Given that the required “R value” for

a suitable ﬂoor protector used must be equal to or greater than:

x TL = 1.19 x 1" = 1.19".

“R” = r

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?

If common brick is used so that the 3 1/2"

dimension is the height, “R” for the common brick becomes:

brick

= rM x TS = 0.20 x 3 1/2" = .70

“R”

Using 1/2" of mortar to set the brick, “R” for the mortar is calculated as follows:

mortar

“R”M = rM x TS = 0.20 x 1/2" = .10

Next, a 3/4" marble slab set in 1/2" mortar covers the brick, “R” for the marble and mortar becomes:

marble

“R”M = rM x TS = 0.05 x 3/4" = .038

mortar

“R”M = rM x TS = 0.20 x 1/2" = .10

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 23

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

The sum of all “R values” is: .70 + .10 +. 038 + .10 = .938

This would NOT be an acceptable combination

of material for the hearth extension since the

total calculated “R value” of the materials used is under the required “R value” of 1.19. An additional layer of insulating materials must be used.

Note: Also see NFI Certiﬁcation Manuals for expanded explanation on calculating “R values” when multiple materials are used.

WARNING

The crack between the ﬁreplace and the hearth extension must be sealed with a noncombustible material.

WARNING

When installing hearth extension in front, the ﬁreplace must be raised if height of hearth extension exceeds 7" (178mm) above the bottom of the ﬁreplace (see Figure 49).

FINISH REQUIREMENTS

Combustible materials may project beyond the

sides of the ﬁreplace opening as long as they There are a wide variety of “ﬁnished looks” for these ﬁreplaces, from formal wall decor with

are kept within the shaded areas illustrated in

Figure 50. elaborate mantels to rustic wood paneling or warm brick facings.

Only noncombustible materials (such as stone, tile, or brick) may overlap the black front facing.

Do not extend these materials beyond the black facing and into the rebox 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.

Combustible materials allowed in shaded Areas

4-3/4"

(121mm)

3-1/4"

(83mm)

Fireplace

1/2"

(13mm)

12" (305mm) Min. Distance to Protected Side Wall

18" (457mm) Min. Distance to Unprotected Side Wall

Figure 50: Vertical Surround Limitations

SHIPPING WEIGHTS

Description Cat. No. Model No. Wt. (lbs)

EST-36 Fireplace Assembly H7955 EST-36 298 EST-42 Fireplace Assembly H7956 EST-42 298 EST-36/42 Refractory Panel Kits:

Traditional Refractory Panel Kit - Gray (unstained) H7960 BLK-EST36/42RB 289 Traditional Refractory Panel Kit - Creamer H8170 BLK-EST36/42RBCR 289 Traditional Refractory Panel Kit - Rust H8172 BLK-EST36/42RBRT 289 Traditional Refractory Panel Kit - Cappuccino H8174 BLK-EST36/42RBCP 289 Herringbone Refractory Panel Kit - Gray (unstained) H7961 BLK-EST36/42SH 301 Herringbone Refractory Panel Kit - Creamer H8171 BLK-EST36/42SHCR 301 Herringbone Refractory Panel Kit - Rust H8173 BLK-EST36/42SHRT 301 Herringbone Refractory Panel Kit - Cappuccino H8175 BLK-EST36/42SHCP 301

7" (178mm) Max. 36” & 42” models 8-1/2" (216mm) Max. 50” models

Max. Thickness of Hearth Extension when Fireplace is on the Floor

Figure 49

Secure the hearth extension to the oor to

prevent possible shifting.

EST-50 Fireplace Assembly H7957 EST-50 330 EST-50 Refractory Panel Kits:

Traditional Refractory Panel Kit - Gray (unstained) H7970 BLK-EST50RB 430 Traditional Refractory Panel Kit - Creamer H8164 BLK-EST50RBCR 430 Traditional Refractory Panel Kit - Rust H8166 BLK-EST50RBRT 430 Traditional Refractory Panel Kit - Cappuccino H8168 BLK-EST50RBCP 430 Herringbone Refractory Panel Kit - Gray (unstained) H7971 BLK-EST50SH 456 Herringbone Refractory Panel Kit - Creamer H8165 BLK-EST50SHCR 456 Herringbone Refractory Panel Kit - Rust H8167 BLK-EST50SHRT 456 Herringbone Refractory Panel Kit - Cappuccino H8169 BLK-EST50SHCP 456

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 24

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

INSTALLATION COMPONENTS

The following items are available for use in the installation of this appliance. Separate installation instructions are packaged with all combustion air kits and chimney terminations.

If you encounter any problems or have questions concerning the installation or application of this system, please contact your distributor.

For the name of your nearest distributor, call:

LENNOX HEARTH PRODUCTS 1508 Elm Hill Pike, Suite 108 Nashville, TN 37210

Combination Offset/Return Elbow: EST-36 / EST-42: 63L34 FTF10-OR15 EST-50: 63L35 FTF13-OR15

Round Termination

EST-36 / EST-42: 63L55 FTF10-CTDTM

Chimney Section

EST-36 / EST-42: 63L16 FTF10-12 63L17 FTF10-18 63L18 FTF10-36 62L94 FTF10-18C 62L95 FTF10-36C

EST-50: 63L19 FTF13-12 63L20 FTF13-18 63L21 FTF13-36

Offset/Return Package (30°) EST-36 / EST-42: 63L23 FTF10-ES30 EST-50: 63L24 FTF13-ES30

Firestop Spacer (30°) All Models: 63L37 F10FS30-2

Firestop Spacer (Flat) All Models: 63L36 F10FS-2

Attic Shield Assembly Firestop Spacer All Models: 63L68 FTF10-FSAS

Round Termination

EST-50: 63L44 FTF13-CTD

Round Termination, Tall

EST-50: 63L47 FTF13-CTDT

Chase Termination / Square

EST-36 / EST-42: 63L52 FTF10-CT2RS

EST-50 63L54 FTF13-CT2

Stabilizer EST-36 / EST-42: 63L26 FTF10-S4 EST-50: 63L27 FTF13-S4

Outside Combustion Air Kit (Required in Canada) All Models: 81L87 FOAK-4 All Models, Less Duct: 81L88 FOAK-4LD

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Chase Termination / Pyramid

EST-50: 63L50 FTF13-CT1

Page 25

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

INSTALLATION COMPONENTS

(continued)

Locking Band All Models: 63L60 FLB

Storm Collar All Models: 63L59 FSC

Flashing All Models: 63L40 F10F6 All Models: 63L41 F10F12

Chase Top Shroud Kit, Arch Top 3X3 All Models: H1988 CTSA-33

Chase Top Shroud Kit, Open Top 3X3 All Models: H1985 CTSO-33

Chase Top Shroud Kit, Open Top 4X4 All Models: H1987 CTSO-44

Chase Top Shroud Kit, Open Top 4X6 All Models: H1986 CTSO-46

Termination Shroud EST-36 / EST-42: 63L56 FTF10-TMS

Termination Shroud Leg Kit All Models: H0911 SLK-4

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 26

LENNOX HEARTH PRODUCTS • ESTATE™ SERIES WOOD-BURNING FIREPLACES • MODELS EST-36, EST-42, EST-50 • INSTALLATION INSTRUCTIONS

Lennox Hearth Products reserves the right to make changes at any time, without notice, in design,

materials, speciﬁcations, and prices, and also to discontinue colors, styles, and products. Consult your local distributor for ﬁreplace code information.

P/N 506023-11 Rev. E 06/2011

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

1508ElmHillPike,Suite108•Nashville,TN37210

Lennox Hearth EST-42, EST-50, EST-36 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual