of the circuit being connected to one of the provided neutral terminals. If an accessory rated at greater than one amp is connected to this terminal, it is necessary to use an exter- nal relay.

One line voltage adeterminnal is provided on the furnace integrated control. See figure 21 for integrated control configuration. This terminal is energized in the heating mode when the combustion air inducer is operat- ing. Any humidifier rated up to one amp can be connected to this terminal with the neutral leg of the circuit being con- nected to one of the provided neutral terminals. If a humidi- fier rated at greater than one amp is connected to this termi- nal, it is necessary to use an external relay relay.

One 24V "H" 1/4" spade terminal is provided on the furnace integrated control. See figure 21 for integrated control con- figuration. The terminal is energized in the heating mode when the combustion air inducer is operating and the pres- sure switch is closed. Any humidifier rated up to 0.5 amp can be connected to this terminal with the ground leg of the circuit connected to ground or the "C" terminal.

Generator Use − Voltage Requirements

The following requirements must be kept in mind when specifying a generator for use with this equipment:

SThe furnace requires 120 volts + 10% (Range: 108

volts to 132 volts).

SThe furnace operates at 60 Hz + 5% (Range: 57 Hz to 63 Hz).

SThe furnace integrated control requires both proper polarity and proper ground. Both polarity and proper grounding should be checked before attempting to op- erate the furnace on either permanent or temporary power.

SGenerator should have a wave form distortion of less than 5% total harmonic distortion (THC).

Thermostat

Install the room thermostat according to the instructions provided with the thermostat. See table 9 for thermostat designations. If the furnace is being matched with a heat pump, refer to the FM21 installation instruction or appropri- ate dual fuel thermostat instructions.

Indoor Blower Speeds

1 − When the thermostat is set to AN ON," the indoor blower will run continuously on the low heat speed when there is no cooling or heating demand.

2 − When the EL280DF is operating in the high−fire or low− fire heating mode, the indoor blower will run on the cor- responding heating speed.

3 − When the EL280DF is operating in the low cool or the high cool cooling mode, the indoor blower will run on the corresponding cooling speed.

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Lennox International Inc EL280DF installation instructions
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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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