Lennox Hearth LSO-43 Waterproofing the Fireplace, Installing the Fireplace, Air Inlet, Clearances

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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.

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.

WATERPROOFING THE FIREPLACE

Although the LSO-43 fireplace is designed to drain to the front most of the water from rain and other sources that may enter the hearth area, condensation and unusual conditions may cause water to collect inside the fire- place bottom.

To prevent this, the builder must provide a means to drain water from under the fire- place by building or installing a water collec- tor of the builder's choice, or installing a PVC

Note: The LSO-43 has been provided with a drain plug under the fireplace by the air inlet opening. If the fireplace is on a platform or wooden surface, a hole must be bored to make room for an elbow connector. If the fireplace is on a concrete floor, it will be necessary to elevate the appliance at least 1" high to permit the installation of an elbow connector.

Step 1. Seal all joints, gaps and corners around the bottom of the fireplace before positioning the fireplace on its location (Figure 4 ).

Step 2. Locate the drainage plug and remove it by depressing the locking tabs and pushing down through the outside air opening at the bottom of the fireplace.

Step 3. On the exposed hole, install a PVC threaded coupling reducer, 3/4" x 1/2" going from inside of the fireplace out. Apply a silicone-based sealant around the base and threads before installation.

Step 4. Holding the reducer coupling with a wrench, thread a 3/4", 90 degree, PVC elbow to the reducer until it is tight to the metal.

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.

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.

Step 2. Insert the provided metal safety strips, beneath the fireplace as illustrated (Figures 5, 6 and 7 ). The safety strips should overlap ¹⁄₂" min. for continual coverage of the floor.

drain as follows:

Seal All

 

Seams,

Access

Joints

And

Drain Plug

Corners

Through

Around The

Air Inlet

Bottom Of

Opening

Fireplace

 

Note: To assure proper drainage, the fireplace must be installed on a leveled surface.

Air Inlet

The installation of the air inlet is required for safe fireplace operation.

Step 1. Determine the location for air inlet, which can be installed through an outside wall. A 6 1/2" diameter hole will be required for installation of the air inlet assembly (see Figure 17 ).

Combustible Wall

Maintain

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

¹⁄₂" (13mm)

Metal Safety Strip

Hearth Extension

Floor

Fireplace On Non-Combustible Floor

Drain Connector

 

(see Detail A )

 

Threaded

Threaded

Reducer

Elbow ³⁄₄”

³⁄₄” x ¹⁄₂”

@ 90°

(PVC)

(PVC)

 

Detail A

CAUTION: AVOID INSTALLING THE AIR IN- LET WHERE THE OPENING COULD BE BLOCKED BY SNOW, BUSHES OR OTHER OBSTACLES. THE MAXIMUM HEIGHT FOR THE OUTSIDE AIR IS 50 FEET ABOVE THE HEARTH, PROVIDING THE AIR INLET IS TER- MINATED A MINIMUM OF THREE (3) FEET BELOW THE CHIMNEY CAP LEVEL.

Note: Air inlet ducts must not terminate in attic space.

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

Figure 5

Combustible

Wall

Maintain

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

¹⁄₂" (13mm)

Hearth Extension

Figure 4

(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: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

Metal Safety Strip

Platform

Floor

Fireplace On Combustible Floor

Figure 6

5

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Contents Wood Burning Outdoor Fireplace P/N 850,015M REV. C 03/2007 Retain These Instructions For Future ReferenceOTL Report No -F-01-2 Table of Contents Introduction Typical Free Standing InstallationGeneral Information Clearances and Height RequirementsAssembly Steps Assembly OutlinePRE-INSTALLATION Notes Chimney SystemWaterproofing the Fireplace Installing the FireplaceAir Inlet ClearancesFront View Fireplace SpecificationsSide View Left Top ViewFTF10 Framing SpecificationsFeet Installing the Chimney SystemSpace 10 3m Max Firestop Space Above Or CeilingChimney 30 Offset Through Floor Using a FTF10-CT2 Chase Termination Using a FTF10-CT1 Chase TerminationUsing a FTF10-CTDT Chase Termination Roof Pitch Model Flat to 6/12FTF10 Chimney Component Calculations Multiple TerminationsTEN Foot Rule Summary Offset Calculations Special Offset InstructionsHeight FTF10 Vertical Elevation ChartChimney Only Chimney OnlyInstalling Offsets FTF10 Offset Elevation ChartFirst, review the Offset Elevation Chart and for reference Underside Of ChimneyFireplace Finishes Optional Equipment ConsiderationsHearth Extensions and Wall Shields RM = rM x TS = 0.05 x 3/4 = Value = 1/k = r x thickness of material usedRM = rM x TS = 0.20 x 1/2 = ShieldFinish to Your Taste Installation ComponentsModel Catalog Number LSO-43Firestop Spacer Flat 63L36 Round Termination 63L43Combination Offset/Return Elbow 63L34 Offset/ Return Package 63L23Orange, CA 850,015M REV. C 03/2007

LSO-43 specifications

The Lennox Hearth LSO-43 is a state-of-the-art gas fireplace that combines aesthetics with functionality, making it a popular choice for modern homeowners. This fireplace stands out due to its sleek design, efficient heating capabilities, and advanced technologies, ensuring that it not only enhances the ambiance of any living space but also provides warmth and comfort.

One of the main features of the LSO-43 is its contemporary design. With a wide viewing area and clean lines, it serves as a stunning focal point in any room. The fireplace is available in various finishes, allowing homeowners to choose a style that complements their decor. The large glass front provides an unobstructed view of the flames, creating an inviting atmosphere, whether used for cozy gatherings or quiet evenings at home.

In terms of technology, the LSO-43 employs a powerful heating system that ensures optimal warmth. It utilizes a high-efficiency burner that enhances the flame’s realism while maximizing heat output. This eco-friendly setup operates with minimal emissions, meeting stringent environmental standards. The unit also has a variable speed blower that effectively distributes heat throughout the room, ensuring consistent comfort.

Another notable characteristic of the Lennox Hearth LSO-43 is its ease of use. It comes with an intuitive remote control that allows homeowners to adjust flame height and heat settings at the touch of a button. Additionally, the fireplace can be operated with a wall switch, offering flexibility and convenience. This user-friendly design makes it accessible for everyone, from tech-savvy individuals to those who appreciate straightforward functionality.

Installation of the LSO-43 is relatively simple, as it can be vented through the wall or the roof, depending on the home’s layout. Moreover, it is compatible with various venting systems, which allows for flexible placement in both new constructions and existing homes.

Overall, the Lennox Hearth LSO-43 blends modern aesthetics with advanced heating technology. With its efficient energy use, stylish design, and user-friendly features, it presents an excellent option for anyone looking to enhance their living space with a gas fireplace. Whether for enjoying evenings with family or for entertaining guests, the LSO-43 promises warmth and elegance in any environment.
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