Lennox Hearth LA41CF Assembly Steps, PRE-INSTALLATION Notes, Clearances, Installing the Fireplace

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Black Portion Of Frame

Not To Be Covered With

Combustible Materials

Wall

20”Covering

45°

1”

 

Door

 

Opening

 

 

Safe

20”

Zone

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.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.

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:

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.

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 LA41 fireplace is as follows; sides and back – 2" (51mm), combustible floor – 0" (0mm), adjacent wall 20" (508mm), adjacent shielded wall (K factor of .54 or less 24" W x 36" H ) 14" (356mm), ceiling – 37 ¹⁄₂" (953mm).

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.

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.

 

 

Maintain

 

 

2" (51 mm)

 

 

Air Space

 

 

At Back

 

 

And Sides

2" (51 mm)

 

Space

 

 

 

 

Hearth

 

 

Extension

Metal Safety Strip

Platform

Floor

Figure 6

 

Maintain

 

2" (51 mm)

 

Air Space

 

At Back

 

And Sides

2" (51 mm)

 

Space

 

 

Hearth

 

Extension

Metal Safety Strip

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" for continual coverage of the floor.

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Contents WH Report No. J20017261-231 Retain These Instructions For Future ReferenceWood Burning Fireplaces P/N 504,217M REV. E 04/2007 Table of Contents Precautions Typical InstallationIntroduction Clearances and Height RequirementsChimney Height Assembly OutlineChase Enclosure Before You StartPRE-INSTALLATION Notes Assembly StepsInstalling the Fireplace ClearancesBlocking Metal Safety Strips Fireplace SpecificationsFront Left SideFraming Specifications 8d Nail Or Equivalent Installing the Chimney SystemChimney 30 Offset Through Floor Or Ceiling 12 to 12/12 Roof Pitch Model Flat to 6/12FTF8-S4 Stabilizer FTF10 Chimney Do Not Seal Flashing Spacers FTF10 FlashingUsing a FTF10-CT1 Chase Termination Using a FTF10-CTDT Chase TerminationUsing a FTF10-CT2 Chase Termination TEN Foot Rule SummaryOffset Calculations Multiple TerminationsSpecial Offset Instructions FTF10 Vertical Elevation Chart Installing Offsets FTF10 Offset Elevation ChartOptional Equipment Considerations Cold Climate Insulation Glass DoorsFireplace Finishes Mantels and TrimUsing the k formula Minimum Hearth Extension DimensionsUsing the r formula Minimum Value per Inch Methods of Determining Hearth Extension and Wall ShieldValue = 1/k = r x thickness of material used Calculating Minimum Thickness if Multiple Materials are UsedMin. Distance To Installation ComponentsFinish to Your Taste Round Termination 63L423 504,217M REV. E 04/2007