GAS UNIT

Dampers

(open during heating

operation only)

AIR HANDLER

Dampers

(open during cooling

operation only)

D A room thermostat must control the furnace. The use of

fixed jumpers that will provide continuous heating is not

allowed.

D The return air duct must be provided and sealed to the

furnace.

D Return air temperature range between 60°F (16°C) and

80°F (27°C) must be maintained.

D Air filters must be installed in the system and must be

maintained during construction.

D Air filters must be replaced upon construction comple-

tion.

D The input rate and temperature rise must be set per the

furnace rating plate.

D One hundred percent (100%) outdoor air must be pro-

vided for combustion air requirements during construc-

tion. Temporary ducting may supply outdoor air to the

furnace. Do not connect duct directly to the furnace.

Size the temporary duct following these instructions in

FIGURE 1

When installed, this furnace must be electrically grounded according to local codes. In addition, in the United States, installation must conform with the current National Elec- tric Code, ANSI/NFPA No. 70. The National Electric Code (ANSI/NFPA No. 70) is available from the following ad- dress:

National Fire Protection Association

1 Battery March Park

Quincy, MA 02269

NOTE − This furnace is designed for a minimum continu- ous return air temperature of 60°F (16°C) or an intermit- tent operation down to 55°F (13°C) dry bulb for cases where a night setback thermostat is used. Return air tem- perature must not exceed 85°F (29°C) dry bulb.

The EL280DF furnace may be installed in alcoves, closets, attics, basements, garages, and utility rooms in the down- flow position.

This furnace design has not been CSA International certified for installation in mobile homes, recreational vehicles, or outdoors.

Use of Furnace as Construction Heater

Lennox does not recommend the use of EL280DF units as a construction heater during any phase of construction. Very low return air temperatures, harmful vapors and op- eration of the unit with clogged or misplaced filters will dam- age the unit.

EL280DF units may be used for heating of buildings or structures under construction, if the following conditions are met:

D The vent system must be permanently installed per these installation instructions.

section for Combustion, Dilution and Ventilation Air in a

confined space with air from outside.

D The furnace heat exchanger, components, duct system,

air filters and evaporator coils must be thoroughly

cleaned following final construction clean−up.

D All furnace operating conditions (including ignition, in-

put rate, temperature rise and venting) must be verified

according to these installation instructions.

General

These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation.

In addition to the requirements outlined previously, the fol- lowing general recommendations must be considered when installing a EL280DF furnace:

DPlace the furnace as close to the center of the air dis- tribution system as possible. The furnace should also be located close to the chimney or vent termination point.

DDo not install the furnace where drafts might blow direct- ly into it. This could cause improper combustion and un- safe operation.

DDo not block the furnace combustion air openings with clothing, boxes, doors, etc. Air is needed for proper combustion and safe unit operation.

DWhen the furnace is installed in an attic or other insu- lated space, keep insulation away from the furnace.

NOTE − The Commonwealth of Massachusetts stipu- lates these additional requirements:

DGas furnaces shall be installed by a licensed plumb- er or fitter only.

DThe gas cock must be

DWhen a furnace is installed in an attic, the passage- way to and service area surrounding the equipment shall be floored.

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Lennox International Inc EL280DF installation instructions Use of Furnace as Construction Heater, General
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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.
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