Setting Equipment

		EL280DF UNIT
		COOLING COIL
	PROPERLY	PLENUM
	SIZED FLOOR	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
	CABINET SIDE
(Field Provided)	PANEL
	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.

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 EL280DF gas furnace as shipped in the down- flow 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.

UNITS 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.

Page 9

EL280DF specifications

Lennox International Inc. has been a leader in the HVAC (Heating, Ventilation, and Air Conditioning) industry for decades, consistently delivering high-quality and energy-efficient products. Among their lineup, the Lennox EL280DF Gas Furnace stands out as an excellent option for homeowners seeking reliable heating solutions.

The EL280DF is a two-stage gas furnace that offers improved efficiency and comfort, making it an ideal choice for moderate climates. One of the main features of the EL280DF is its energy efficiency, boasting an AFUE (Annual Fuel Utilization Efficiency) rating of up to 80%. This means that a significant portion of the fuel consumed is converted into heating energy, resulting in lower energy bills and reduced environmental impact.

Another noteworthy characteristic of the EL280DF is its quiet operation. Equipped with advanced sound-dampening technologies, the furnace operates with minimal noise, ensuring that your home remains a serene environment. This is especially important during the colder months when the furnace is often in frequent use.

The EL280DF also employs a two-stage heating system, which allows it to operate at a lower capacity during milder temperatures and ramp up to full capacity during the coldest days. This feature not only enhances comfort by maintaining a more consistent temperature but also contributes to energy savings by reducing unnecessary energy consumption.

In terms of installation, the EL280DF is designed for flexibility. It can be configured for various types of homes and installations, making it suitable for both new constructions and system replacements. Its compact size allows it to fit in tight spaces, providing versatility in home design.

Moreover, the EL280DF is equipped with a durable heat exchanger that ensures longevity and reliability. Lennox has also included features like a self-diagnostic control board, making troubleshooting easier and enhancing the overall reliability of the system.

In conclusion, the Lennox EL280DF Gas Furnace is a remarkable combination of efficiency, quiet operation, and versatility. With its two-stage heating capabilities and advanced technologies, it stands as a solid choice for homeowners looking to invest in a durable and energy-efficient heating solution. Whether building a new home or upgrading an old system, the EL280DF promises comfort and reliability during the coldest months of the year.