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Lennox ELITE EL296DFE User Manual

Lennox ELITE EL296DFE
61 pages
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Page 1
INSTALLATION
INSTRUCTIONS
EL296DFE
507069-05
04/2022
Supersedes 10/2021
THIS MANUAL MUST BE LEFT WITH THE
HOMEOWNER FOR FUTURE REFERENCE
This is a safety alert symbol and should never be
ignored. When you see this symbol on labels or in man-
uals, be alert to the potential for personal injury or death.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer (or
equivalent), service agency or the gas supplier.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
© 2022 Lennox Industries Inc.
Dallas, Texas USA
ELITE
®
SEREIS GAS FURNACE
DOWNFLOW AIR DISCHARGE
Contents
Unit Dimensions - inches (mm) ......................................2
EL296DFE Gas Furnace ................................................3
Shipping and Packing List ..............................................3
Safety .............................................................................3
Use of Furnace as a Construction Heaterl .....................4
General ...........................................................................5
Combustion, Dilution, Ventilation Air...............................5
Setting Equipment ..........................................................8
Filters ............................................................................12
Duct System .................................................................12
Pipe Fittings Specications...........................................12
Venting Options ............................................................13
Joint Cementing Procedure .......................................... 16
Venting Practices ..........................................................16
Vent Pipe Guidleines ....................................................18
Gas Piping ....................................................................35
Electrical .......................................................................37
Integrated Control .........................................................39
Unit Start-Up .................................................................48
Gas Pressure Measurement.........................................49
Proper Combustion.......................................................50
High Altitude .................................................................50
Other Unit Adjustments.................................................52
Sequence of Operation.................................................52
Service..........................................................................53
Star-Up and Performance Checklist ............................. 55
Repair Parts List ...........................................................58
Blower Data ..................................................................59
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Lennox ELITE EL296DFE Specifications

General IconGeneral
ModelEL296DFE
TypeGas Furnace
EfficiencyUp to 96% AFUE
StagesTwo-stage
Blower MotorVariable-Speed
Fuel TypeNatural Gas or Propane

Summary

EL296DFE Gas Furnace

Shipping and Packing List

Lists components included in the furnace package. Unit must be checked for damage.

Safety Information

Warnings and Cautions

Highlights potential hazards like explosion, fire, and property damage. Read carefully.

Building Codes and Locations

Locations and Clearances

Specifies requirements for furnace placement, including garages and hazardous atmospheres.

Combustion, Dilution & Ventilation Air

Combustion Air Requirements

Details indoor air quality considerations for non-direct vent systems and hazardous substances.

Installation - Setting Equipment

Equipment Leveling and Placement

Provides guidance on leveling the unit and selecting a proper installation location with clearances.

Downflow Application Clearances

Installation on Flooring

Details procedures for installing the furnace on non-combustible and combustible floors.

Duct System and Filters

Duct System Requirements

Covers industry-approved standards for sizing and installing supply and return air ducts.

Venting Options and Pipe Specifications

Pipe and Fittings Specifications

Lists approved materials and standards for PVC, CPVC, and ABS vent piping systems.

Venting Practices and Joint Cementing

Joint Cementing Procedure

Provides detailed, step-by-step instructions for properly cementing PVC and ABS pipe joints.

Vent Piping Guidelines

Piping Size Process

Guides users through determining the correct vent pipe diameter based on furnace capacity and configuration.

Vent Termination Clearances

Non-Direct Vent Clearances

Specifies required clearances for vent terminals in non-direct vent installations based on US and Canadian codes.

Direct Vent Piping Terminations

Exhaust and Intake Pipe Routing

Details how to route intake and exhaust pipes for direct vent installations, including separations and supports.

Non-Direct Vent Exhaust Terminations

Condensate Piping

Explains how to route and connect condensate piping, including trap installation and slope requirements.

Gas Piping and Leak Check

Gas Piping Installation

Covers gas pipe routing, connection torque, support, and slope requirements. Includes leak testing.

Electrical Connections

Wiring and Grounding

Details electrical safety, wiring size, grounding, and connection of accessories and thermostats.

Integrated Control Configuration

On-Board Links and DIP Switches

Explains on-board links and DIP switches for configuring blower speeds and system options.

Integrated Control Diagram

Terminal Connections

Identifies various terminals on the integrated control board for wiring thermostats, sensors, and accessories.

Field Wiring Applications

Conventional Thermostat Wiring

Illustrates wiring connections for conventional thermostats with various heating and cooling stage configurations.

Unit Start-Up Procedures

Gas Valve Operation

Provides safety instructions and steps for operating the gas valve and initiating furnace startup.

Heating Sequence and Gas Pressure

Heating Sequence of Operation

Describes the step-by-step process of the furnace's heating cycle, from thermostat call to burner operation.

Combustion Analysis and High Altitude

Proper Combustion Checks

Details how to perform combustion analysis and check CO levels, along with high altitude adjustments.

Other Unit Adjustments and Two-Stage Heat

Two-Stage Thermostat Heating Sequence

Explains the heating sequence when using a two-stage thermostat, including blower speed control.

Service and Maintenance

Annual Furnace Maintenance

Provides a checklist for annual system checks, including electrical, gas, filter, and blower assembly inspections.

Start-Up & Performance Check List

Unit Set Up Checklist

A comprehensive checklist covering gas supply, venting, duct system, and electrical connections for unit setup.

Unit Operation Checks

Heating & Cooling Mode Checks

Outlines key operational checks for heating and cooling modes, including pressure, CO2, blower amps, and temperatures.

Repair Parts List

Canadian Venting Requirements

Specific venting requirements for Canada, particularly Ontario, for horizontal sidewall terminations.

Blower Performance Data

Blower Speed Performance

Provides tables detailing air volume and watts consumed at various static pressures and blower speeds.

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