Lennox Hearth LBC-3824, LBR-3824 Installing the Fireplace, Assembly Steps, PRE-INSTALLATION Notes

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Black Portion Of Frame

Not To Be Covered With

Combustible Materials

Wall

18”Covering

45°

1”

 

Door

 

Opening

 

 

Safe

18”

Zone

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.

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:

INSTALLING THE FIREPLACE

Step 1. Slide the fireplace into prepared fram- ing or position fireplace in its final position and frame later.

The fireplace may not be recessed into a com- bustible floor. Maintain the floor to hearth clearance established by the fireplace lower front face.

Figure 5

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

ASSEMBLY STEPS

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

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.

2. Measure the square footage of the floor

space to be occupied by the system, surrounds

and hearth extensions.

3. Note the floor construction, i.e. 2 x 6’s, 2 x 8’s

or 2 x 10’s, single or double joists, type and

thickness of floor boards.

Combustible

Wall

Maintain 1/2" (13mm) Air Space at Sides and Back

1/2" (13mm)

Metal Safety Strip

Hearth

Extension

Floor

1.Position firebox prior to framing or into prepared framing.

2.Install the chimney system.

3.Install optional outside combustion air kit.

4.Plumb gas line if a decorative gas appliance will be used. (Gas connections should only be performed by an experienced, licensed/certi- fied tradesman.)

5.Complete the installation, finish wall mate- rial, surround and hearth extension to your individual taste.

6.Assemble and attach optional glass door assembly.

Study the three dimensional illustration (Fig- ure 1 ) to get a general idea of each element of your fireplace system.

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, ply- wood, particle board or other hard surfaces.

4. Use this information and consult your local

building code to determine if you need addi-

tional support.

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.

If you plan to raise the fireplace and hearth extension, build the platform assembly then position fireplace and hearth extension on top. Secure the platform to the floor to prevent possible shifting.

CLEARANCES

Minimum clearance to combustibles for the fireplace is as follows; sides and back – 1/2" (13mm), combustible floor – 0" (0mm), adja- cent wall 18" (457mm), adjacent shielded wall (K factor of .84 or less 40" W x 40" H ) 12" (305mm), ceiling – 37-1/2" (953mm). Refer to page 17 for more detail.

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.

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Figure 6

Combustible

Wall

Maintain 1/2" (13mm) Air Space at Sides and Back

Hearth Extension

1/2" (13mm)

Metal Safety Strip

Platform

Floor

Figure 7

Step 2. Insert the provided metal safety strips, beneath the fireplace as illustrated (Figures 6, 7 and 8 ). The safety strips should overlap 1/2" min. for continual coverage of the floor.

Note: Safety strips are not required when fire- place rests on a noncombustible surface.

Note: Install the hearth extension only as illus- trated (see Figures 43 and 44).

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Contents WH Report No -915173A Retain These Instructions For Future ReferenceTable of Contents Precautions Typical InstallationIntroduction Clearances and Height RequirementsChimney Height Assembly OutlineChase Enclosure Location of FireplaceAssembly Steps Installing the FireplacePRE-INSTALLATION Notes ClearancesFront LBC Shown Fireplace SpecificationsLeft Side Right Side Top ViewFTF10 Framing SpecificationsInstalling the Chimney System For Canadian Installations, Proceed with Steps 6 throughOr Ceiling 8d nails when completely installedFor Canada Only Chimney 30 Offset Through Floor12 to 12/12 Roof Pitch Model Flat to 6/12FTF10 Chimney Component Calculations TEN Foot Rule SummaryMultiple Terminations Offset Calculations Special Offset InstructionsFTF10-CT1 Termination FTF10-CT2 TerminationNumber Of FTF10 FTF10 Vertical Elevation ChartChimney Only InchesFirst, review the Offset Elevation Chart and for reference FTF10 Offset Elevation ChartInstalling Offsets Optional Equipment Considerations Fireplace Finishes Cold Climate InsulationMethods of Determining Hearth Extension and Wall Shield Hearth Extension DimensionsTL = minimum thickness of listed material Opening WidthRM = rM x TS = 0.05 x 3/4 = Finish to Your TasteThere are a wide variety of finished looks for Value = 1/k = r x thickness of material usedInstallation Components Orange, CA Installation Components850,003M REV. G 01/2010