Lennox ELITE EL296V - User Manual

Page 1
INSTALLATION
INSTRUCTIONS
EL296DFV
507048-04
072022
Supersedes 10/2021
©
2022 Lennox Industries Inc.
Dallas, Texas USA
ELITE
®
SERIES GAS FURNACE
DOWNFLOW AIR DISCHARGE
Contents
Unit Dimensions - inches (mm) ......................................2
EL296DFV Gas Furnace ................................................3
Shipping and Packing List ..............................................3
Safety Information ..........................................................3
Use of Furnace as Construction Heater .........................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 Piping Guidelines ................................................18
Gas Piping ...................................................................35
Electrical ......................................................................37
Integrated Control ........................................................47
Blower Motor Performance ..........................................52
Unit Start Up ................................................................56
Gas Pressure Measurement ........................................57
Proper Combustion / High Altitude ..............................58
Heating Sequence of Operation ..................................60
Service .........................................................................61
Program Unit Capacity Size Mode ...............................63
Repair Parts List ...........................................................65
Start-Up Checklist.........................................................67
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.
NOTICE
A thermostat is not included and must be ordered
separately.
• A communicating thermostat must be used in
communicating applications.
• In non-communicating applications, the Lennox
ComfortSense
®
7500 thermostat may be used, as well
as other non-communicating thermostats.
In all cases, setup is critical to ensure proper system
operation.
Field wiring for both communicating and non-
communicating applications is illustrated in diagrams,
which begin on Page 39.
CAUTION
As with any mechanical equipment, personal injury can
result from contact with sharp sheet metal edges. Be
careful when you handle this equipment.

Summary

Installation Requirements and Guidelines

Building Codes and Standards

Location and Clearance Requirements

Specifies placement and space requirements for safe furnace installation.

General Installation Notes and Air Requirements

Combustion, Dilution, and Ventilation Air

Explains the critical requirements for providing adequate air for combustion and ventilation.

Air Supply for Confined and Unconfined Spaces

Unconfined Space Air Requirements

Confined Space Air Requirements

Furnace Setup and Handling

Installation - Setting Equipment

Guidance on selecting the location and properly setting the furnace unit.

Venting Options and Pipe Specifications

Venting Options

Describes how to modify the furnace for different vent configurations.

Pipe & Fittings Specifications

Joint Cementing, Venting Practices, and Common Vent Systems

Joint Cementing Procedure

Step-by-step guide for properly cementing PVC and ABS vent pipes.

Venting Practices

Guidelines for vent pipe sizing, suspension, and termination.

Vent Piping Guidelines

Non-Direct Vent Termination Clearances (USA;Canada)

Direct Vent Termination Clearances (USA;Canada)

Direct Vent Intake and Exhaust Piping Terminations

Condensate Piping Installation

Condensate Trap and Drain Assembly

Gas Piping Installation and Leak Check

Gas Piping Safety Precautions

Important warnings and cautions regarding gas piping installation and handling.

Leak Check Procedure

Steps for safely checking all gas piping connections for leaks.

Electrical Connections and Precautions

Electrostatic Discharge (ESD) Precautions

Electrical Safety Warnings

Critical safety information regarding wiring, grounding, and wire types.

Thermostat, Blower, and Generator Configuration

Thermostat Selection and Wiring

Indoor Blower Speed Configuration

How to set indoor blower speeds for heating, cooling, and continuous fan modes.

EL296 DFV Schematic Wiring Diagram

Integrated Control Terminal and Connector Guide

Integrated Control DIP Switch Settings (Conventional)

Heating Operation DIP Switch Settings

DIP switch settings for controlling heating operation stages and delays.

Indoor Blower Operation DIP Switch Settings

Unit Start-Up Procedure

Gas Valve Operation and Safety

Instructions for operating the gas valve and associated safety checks.

Heating Sequence of Operation and Gas Pressure

Heating Sequence of Operation

Gas Pressure Adjustment

Combustion Analysis and High Altitude Adjustments

Proper Combustion Testing

High Altitude Installation Considerations

Venting and Combustion Air Testing

Non-Direct Vent Testing Procedure

Steps to ensure proper venting and combustion air for safety.

Heating Sequence of Operation Details

Electronic Ignition Heating Sequence

Two-Stage Thermostat Heating Sequence

Single-Stage Thermostat Heating Sequence

Furnace Service and Maintenance

Furnace Service Warnings and Procedures

Critical safety warnings and general procedures before performing service.

Annual Furnace Maintenance Checklist

Program Unit Capacity;Size Mode

Start-Up and Performance Check List

Unit Operation Check List

Lennox ELITE EL296V Specifications

General

AFUE Rating	96%
Blower Motor	Variable speed
Energy Star Certified	Yes
Fuel Type	Natural gas
Ignition Type	Direct Spark Ignition
Heating Capacity	44, 000 to 132, 000 BTU/h
Warranty	Limited Lifetime Heat Exchanger Warranty, 10-Year Limited Parts Warranty
Thermostat Compatibility	Compatible with iComfort® thermostats