Lennox EL297DFV(K) Elite Series Gas Furnace

This document provides detailed specifications for the Lennox EL297DFV(K) Elite Series gas furnace, a residential unit designed for downflow, two-stage heating with a variable speed blower and refrigerant detection capabilities.

Product Overview

The EL297DFV(K) is a high-efficiency gas furnace with an AFUE of 97%. It offers input capacities ranging from 44,000 to 110,000 Btuh and nominal add-on cooling capacity from 2 to 5 tons. The unit features a compact cabinet suitable for downflow applications and is designed to work with the Lennox Smart Zoning System.

Key Features and Components

Heat Exchanger: Lennox Duralok Plus™ Aluminized Steel Heat Exchanger (primary) and a secondary heat exchanger made of aluminum fins with stainless steel tubes.
Burners: Aluminized steel inshot burners for efficient combustion.
Ignitor: SureLight® Hot Surface Ignitor for reliable performance.
Gas Control Valve: Two-stage, 24-volt redundant combination gas control valve.
Blower: Two-speed combustion air inducer and a variable speed direct drive blower motor (ECM).
Cabinet: Heavy-gauge, cold-rolled steel with a pre-painted finish, insulated for efficiency and low noise. Features a sealed blower compartment and tool-less access panels.
Controls: SureLight® Integrated Furnace Control with advanced diagnostics and compatibility with Lennox communicating thermostats.
Safety Features: Flame sensor, safety interlock switch, and flame rollout switches.

Applications and Zoning

The EL297DFV(K) is suitable for residential applications and can be integrated with Lennox indoor coils, air cleaners, and humidifiers. Its design supports zoning applications with the Lennox Smart Zoning System, allowing precise control of airflow and heat output for up to four zones.

Technical Specifications

Input Capacities: 44,000, 66,000, 88,000, and 110,000 Btuh.
AFUE: 97%.
Cooling Capacity: 2 to 5 Tons.
Gas Manifold Pressure: Natural Gas: 3.5/10.0 in. w.g.; LPG/Propane: 1.7/4.5 in. w.g.
Ventilation: Designed for direct vent or non-direct vent sealed combustion systems. Supports various termination kits and vent pipe materials (PVC, PolyPro®, Centrotherm InnoFlue®).
Electrical: 120 volts, 60 Hertz, 1 phase.
Dimensions: Specific dimensions (A, B, C) are provided for different model numbers, with options for cabinet width.

Approvals and Warranty

Approvals: AHRI Certified, CSA International Certified, ENERGY STAR® certified. Meets California Nitrogen Oxides Standard (NOx) limits.
Warranty: Duralok Plus™ Aluminized Steel Heat Exchanger has a limited lifetime (twenty year transferable) warranty in residential applications. Other components have limited warranties (e.g., five years residential).

Indoor Air Quality Products

Lennox offers various indoor air quality products that can complement the furnace, including the PureAir® S Air Purification System, Healthy Climate® Media Air Cleaners, Whole Home In Duct Air Purifiers, Ultraviolet Germicidal Lights, and the Smart Air Quality Monitor.

Optional Accessories

A range of optional accessories are available, including:

Downflow Combustible Flooring Base
High Performance Economizer (Commercial Only)
Condensate Drain Heat Cable Kits
Crawl Space Vent Drain Kit
Thermostats (S40 Smart Wi-Fi, E30 Smart Wi-Fi)
Remote Outdoor Temperature Sensor
75VA Transformer
Downflow Filter Cabinet
Venting accessories (Flue Coupling, Left Side Vent Kit, Termination Kits)
Mufflers

Installation Clearances

Specific installation clearances are provided for sides, rear, top/plenum, front, front (service/alcove), and floor. These clearances ensure safe and proper operation.

Blower Data

Detailed blower performance data, including heating and cooling speed cfm and motor watts at various external static pressures, is provided for each model. This data is crucial for proper system setup and performance tuning.

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