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This document is the User's Information Manual for the Lennox EL297DFV Series Gas Furnace, providing essential details for its safe operation, maintenance, and troubleshooting. The furnace is designed to provide heating for residential applications, utilizing natural gas or LP/propane gas as fuel. It incorporates various safety features to protect both the user and the property, emphasizing the importance of professional installation and service.
The Lennox EL297DFV Series Gas Furnace operates by burning gas to generate heat, which is then distributed throughout a building via a blower system. The combustion process is carefully controlled to ensure complete burning of the gas, minimizing the production of harmful carbon monoxide. Key components include burners where gas is ignited, a combustion air inducer that supplies air for combustion, a heat exchanger that transfers heat to the circulating air, and a blower motor that moves the heated air through the ductwork. An integrated control system manages the sequence of operation, including ignition, flame sensing, and safety shutdowns. The furnace is equipped with an automatic ignition system, eliminating the need for manual lighting of the burners. When the thermostat calls for heat, the ignitor automatically lights the burners, and the system monitors the flame to ensure safe operation.
The EL297DFV furnace is designed for user convenience and safety. It features a gas control switch that allows users to turn the gas supply to the burners on or off. This switch should only be operated by hand, and any difficulty in moving it warrants a call to a licensed professional service technician. The unit is designed to operate with a thermostat, which controls the desired temperature setting. Users are advised not to set the thermostat below 60°F (16°C) in heating mode, as this can reduce heating cycles and potentially damage the unit, which may not be covered by the warranty.
For safety, the manual provides clear instructions on what to do if a gas smell is detected, emphasizing immediate evacuation and contacting the gas supplier or fire department. It also warns against obstructing airflow to the unit, storing flammable materials nearby, or drawing return air from rooms where other gas appliances are installed, as these actions can create negative pressure and draw flue products back into the living space. The furnace's vent pipes, both intake and exhaust, must remain unobstructed, especially after heavy snow, ice, or frozen fog events, to prevent restrictions that could lead to unsafe operation.
The furnace's design includes an outer access panel, a blower access panel, and a top cap, which are part of the cabinet. The control panel houses a transformer, integrated control, and a door interlock switch, all contributing to the unit's safe and automated operation. The heating parts include a flame sensor, heat exchanger assembly, gas manifold, combustion air inducer, gas valve, main burner cluster, main burner orifices, pressure switch, ignitor, primary limit control, and flame rollout switches, all working in concert to provide efficient and safe heating.
Regular maintenance is crucial for the safe and efficient operation of the EL297DFV furnace and is a condition for the Lennox Limited Warranty. The manual strongly recommends an annual inspection and maintenance by a licensed professional service technician (or equivalent). This annual check should ideally be performed before the heating season begins.
Key maintenance tasks include:
The manual also emphasizes the importance of ensuring sufficient combustion air is available to the furnace, meaning fresh air grilles and louvers must be properly sized, open, and unobstructed. Users are warned that the blower access panel must be securely in place when the blower and burners are operating to prevent gas fumes, which could contain carbon monoxide, from entering the living space. Additionally, the manual advises caution when handling the unit due to sharp edges that could cause personal injury.
In case of any unusual sounds, odors, visible signs of malfunction, or symptoms of carbon monoxide exposure, users are instructed to shut down the unit and contact a Lennox dealer for inspection. The manual also provides a "Service Reminder" checklist for users to review before calling a service technician, covering common issues like electrical disconnect switches, thermostat settings, blown fuses, gas valve position, and gas supply.
General| Model | EL297DFV Series |
|---|---|
| Efficiency Rating | 97% AFUE |
| Blower Type | Variable Speed |
| Stages | Two-Stage |
| Fuel Type | Natural Gas or Propane |
| Warranty | 10-Year Limited Warranty on parts |
