CHASE CONSTRUCTION

The chase is a hollow vertical enclosure framed as a part of the building and covered with a suitable exterior veneer. Always consult local building codes for approved chase construction techniques.

The chase flashing, fabricated locally, is used to anchor the termination to the chase. The flashing should be constructed to overlap the chase to seal out the elements.

CHASE DIMENSIONS

The chase must be large enough to accommodate the vent system and its required clearances to combustibles. The base of the Direct Vent Chase Top Vertical Termination is nineteen and five eights inches (19 5/8" ) for the SV4.5CTS and twenty three inches (23") for the SV8CTS. The chase and its chase flashing must exceed those dimensions by one (1) inch on all sides. This means the minimum chase dimensions must be a minimum of twenty one and five eights inches (21 5/8" ) for the SV4.5CTS and twenty five (25") for the SV8CTS.

TO INSTALL THE TERMINATION

The installation of this termination also requires additional components.

•Chase Flashing - The flashing should be a minimum 0.018" thick G90 galvanized steel or equivalent per ASTM 525. The chase flashing must have, integrated into it, a vertical collar (see Figure 1 ).

 

*9"

3/4" (38 mm) Min. to

 

(229 mm) I.D.

2" (51 mm) Max.

 

 

2"

 

 

(51 mm)

**21-5/8" Min.

 

 

(550 mm)

 

 

 

 

**21-5/8" Min.

 

 

(550 mm)

*For SV8CTS - 12” (305 mm) I.D.

 

**For SV8CTS - 25” (635 mm)

 

 

Figure 1

Chase Flashing

Too short of a collar or no collar at all will allow water to seep into the chase around the outside of the pipe system, and too tall of a collar will interfere with the proper attachment of the termination.

The collared opening must be large enough to allow for the direct vent pipe system to be installed and the termination outer collar to move freely. The collared opening can be no larger than nine (9) inched in diameter.

•Strap Support - The SV4.5SU strap support is to be used for keeping the vent pipe system in the center of the chase (refer to Figure 3 ).

•Silicone Caulk - This is to be used for the final sealing of the installation. The collar must be properly sealed to the chase flashing with appropriate caulk. Hi-Temp sealant P/N 10K81 is recommended. Failure to properly seal the collared opening will result in leakage into the chase.

INSTALLATION STEPS

Step 1. Install the gas appliance in accordance with its installation instructions.

Step 2. Determine the chimney height vent configuration and number of strait direct vent pipe sections required to bring the top of the last pipe section flush with the chase top. Two inches (2") maximum above to three inches (3") maximum below are the acceptable limits. Please see the Installation Instructions accessories list for pipe information. Install the direct vent pipe system.

If the top of the last pipe section exceeds the 3" maximum from the chase top (up to 5" maximum), please use an adjustable length slip section SV4.5LA (Cat. No. 77L75) or SV8LA (Cat. No. H2255) to engage the termination with the pipe. See Step 3 for details.

Step 3. Install the sweaged side of the adjustable pipe section all the way inside the termination. Secure it with three sheet metal screws (not provided) one inch (1") above the termination outer collar bottom, in three equally spaced places around the termination (see Figure 2 ).

Outer Collar

1"

 

# 8-32 Sheet Metal Screw (Three Places)

Adjustable Slip Section (Sweaged Side At Top)

Figure 2

Step 4. Install the SV4.5 pipe strap support (Cat. No. 96K93) or SV8SU pipe strap support (Cat. No. H2262) to keep the vent system from moving (see Figure 3 ). The strap support should be placed a minimum of one foot (1') to a maximum of 2 feet (2') below the chase top.

Step 5. Install the chase flashing on the top of the chase. Secure the flashing to the top of the chase, using 8d nails.

Step 6. Connect the termination with the top pipe section. Slide the termination inside pipe and lower it onto the chase flashing.

Step 7. Rotate the termination as needed to square it to the chase flashing for proper aesthetic appearance.

2

NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

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Lennox Hearth SV4.5CTS Series Chase Construction, Chase Dimensions, To Install the Termination, Installation Steps
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SV8CTS series, SV4.5CTS Series specifications

The Lennox Hearth SV4.5CTS and SV8CTS Series represent an evolution in efficient heating solutions, designed to enhance both comfort and aesthetics in residential spaces. These versatile units combine modern technology with traditional heating methods, catering to a wide array of consumer needs.

The SV4.5CTS Series is particularly noteworthy for its compact design, which makes it an ideal choice for smaller spaces. This model features a 4.5 cubic foot firebox, allowing for longer burn times and a more efficient use of fuel. The large viewing area, complemented by the clean lines of its construction, provides an inviting ambiance that is a perfect fit for various home styles. Advanced combustion technology in the SV4.5CTS ensures that it operates with high efficiency, producing more heat with less wood, thereby minimizing emissions.

On the other hand, the SV8CTS Series boasts a more substantial firebox capacity of 8 cubic feet, perfect for larger homes or areas that require additional heating. This series is engineered with a focus on performance, featuring enhanced airflow systems that promote even heat distribution throughout the room. Additionally, the SV8CTS utilizes secondary combustion technology to maximize heat output while minimizing environmental impact.

Both series are equipped with user-friendly controls, making them accessible for homeowners. The intuitive design allows for easy adjustments to heat output, giving users control based on their specific needs. The inclusion of an automatic blower system in both models helps circulate warm air more effectively, further enhancing overall comfort levels.

Durability is a hallmark of Lennox products. The SV4.5CTS and SV8CTS are constructed using high-grade materials designed to withstand the rigors of daily use while maintaining their aesthetic appeal over time. Their robust build quality ensures a long lifespan, making them a sound investment for any homeowner.

In summary, the Lennox Hearth SV4.5CTS and SV8CTS Series merge modern heating technology with stylish design. Whether you're looking for an efficient solution for a small space or a powerful heater for a larger area, both series exemplify Lennox's commitment to quality, efficiency, and performance, offering users a comfortable and environmentally friendly heating option for their homes.
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