SL280DFV UNIT

 

COOLING COIL

PROPERLY

PLENUM

SIZED FLOOR

 

OPENING

 

FIGURE 8

Return Air Opening −− Downflow Units

The following steps should be taken when installing ple- num:

1 − Bottom edge of plenum should be flanged with a hemmed edge (See figure 9).

PLENUM

SECURE FROM

 

OUTSIDE CABINET

Side View

 

 

HEMMED EDGE

SEALING STRIP (Field Provided)

CABINET SIDE PANEL

FIGURE 9 2 − Sealing strip should be used.

3 − In all cases, plenum should be secured to top flanges of furnace with sheet metal screws.

 

PLENUM

SECURE FROM IN-

Side View

SIDE CABINET

 

 

HEMMED EDGE

FIBERGLASS

 

SEALING STRIP

CABINET SIDE

 

(Field Provided)

PANEL

 

FIGURE 10

4 − In closet installations, it may be impossible to install sheet metal screws from the outside. In this case, make plenum with a removable front and install screws from the inside (See figure 10).

5 − Make certain that an adequate seal is made.

Setting Equipment

WARNING

Do not install the furnace on its front, back or in the horizontal position. See figure 12. Do not connect the return air ducts to the back of the furnace. Doing so will adversely affect the operation of the safety con- trol devices, which could result in personal injury or death.

Install the SL280DFV gas furnace as shipped in the downflow position only. Do not install the furnace hori- zontally.

Select a location that allows for the required clearances that are listed on the unit nameplate. Also consider gas supply connections, electrical supply, vent connection, and installation and service clearances [24 inches (610

mm)at unit front]. The unit must be level.

NOTE − Units with 1/2 hp blower motors are equipped with three flexible legs and one rigid leg. See figure 11. The rigid leg is equipped with a shipping bolt and a flat white plastic washer (rather than the rubber mounting grommet used with a flexible mounting leg). The bolt and washer must be removed before the furnace is placed into opera- tion. After the bolt and washer have been removed, the rig- id leg will not touch the blower housing.

SL280DFV07036A WITH 1/2 HP

BLOWER MOTOR

RIGID LEG

remove shipping bolt and washer

FIGURE 11

WARNING

The blower access panel must be securely in place when the blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal inju- ry or death.

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Lennox International Inc Setting Equipment, SL280DFV Unit, Cooling Coil, Properly Plenum Sized Floor Opening
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DAVE LENNOX SIGNATURE COLLECTION GAS FURNACE, SL280DFV specifications

Lennox International Inc has made a significant mark in the heating, ventilation, and air conditioning (HVAC) industry, known for its commitment to innovation and energy efficiency. One of its standout products is the SL280DFV model, a high-efficiency gas furnace designed to meet the needs of modern homes.

The SL280DFV boasts an impressive Annual Fuel Utilization Efficiency (AFUE) rating of up to 80%. This rating indicates that the furnace converts 80% of the fuel it consumes into usable heat, making it a cost-effective choice for homeowners. The high efficiency not only reduces energy bills but also lessens the environmental impact by minimizing greenhouse gas emissions.

One of the key features of the SL280DFV is its two-stage gas valve operation. This technology allows the furnace to operate at two levels of heating output: low stage for milder days and high stage for extremely cold temperatures. This adaptability enhances comfort by maintaining more consistent indoor temperatures while also saving energy when full power is unnecessary.

Another innovative aspect of the SL280DFV is its variable-speed blower motor. This smart technology enables the furnace to adjust airflow based on the heating needs of a home, which promotes quiet operation and improved temperature consistency throughout living spaces.

The SL280DFV is equipped with a durable heat exchanger that is designed to withstand the rigors of daily use, contributing to the unit’s longevity. Additionally, the furnace features a smart ignition system that ensures reliable start-ups, so homeowners can depend on it through the coldest winter nights.

Safety is also a priority in the design of the SL280DFV. It includes various safety features such as a built-in flame sensor and advanced venting system, designed to avert hazardous situations and ensure optimal operation.

Furthermore, Lennox offers convenient installation and maintenance support, making the SL280DFV not only an efficient heating solution but also a practical choice for homeowners. With its blend of advanced technology, high efficiency, and reliability, the Lennox SL280DFV is an appealing option for those looking to upgrade their home’s heating system, promising comfort and peace of mind for many winters to come.
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