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Lennox EL296UH045XV36B User Manual

Lennox EL296UH045XV36B
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Page 1
UNIT INFORMATIONUNIT INFORMATION
Service Literature
©2016 Lennox Industries, Inc.
EL296UHV(X)
Corp 1125-L5
Revised 03/2022
COMMUNICATING - ENABLED EL296UHV(X) SERIES UNITS
EL296UHV(X) series units are 90% e󰀩ciency gas furnac-
es used for upow or horizontal applications only, man-
ufactured with Lennox Duralok heat exchangers formed
of aluminized steel. EL296UHV(X) units are available in
heating capacities of 44,000 to 132,000 Btuh and cooling
applications up to 5 tons. Refer to Product Specications
Manual for proper sizing.
Units are factory equipped for use with natural gas. Kits
are available for conversion to LPG operation. EL296UH-
V(X) model units are equipped with the icomfort
®
enabled
SureLight ® two-stage variable speed integrated control.
EL296UHV(X) unit meets the California Nitrogen Oxides
(NOx) Standards and California Seasonal E󰀩ciency re-
quirements. All units use a redundant gas valve to assure
safety shut-o󰀨 as required by C.S.A.
All specications in this manual are subject to change.
Procedures outlined in this manual are presented as a
recommendation only and do not supersede or replace lo-
cal or state codes. In the absence of local or state codes,
the guidelines and procedures outlined in this manual (ex-
cept where noted) are recommendations only and do not
constitute code.
TABLE OF CONTENTS
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
Blower CFM Data . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
I Unit Components . . . . . . . . . . . . . . . . . . . . . . . Page 27
II Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 58
III Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 81
IV Heating System Service Checks . . . . . . . . . Page 82
V Typical Operating Characteristics . . . . . . . . . Page 86
VI Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . Page 86
VII Wiring and Sequence of Operation . . . . . . Page 89
VIII Field Wiring and Jumper Settings . . . . . . . Page 95
IX Program Unit Capacity Size Mode . . . . . . . Page 109
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . Page 110
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.

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Lennox EL296UH045XV36B Specifications

General IconGeneral
ModelEL296UH045XV36B
TypeGas Furnace
Efficiency Rating96% AFUE
Blower TypeVariable Speed
Fuel TypeNatural Gas
WarrantyLimited Lifetime Heat Exchanger warranty; 5-Year Limited warranty on covered components
Heating Capacity44, 000 BTU/h
Stages of Heat2-Stage

Summary

COMMUNICATING - ENABLED EL296UHV(X) SERIES UNITS

SPECIFICATIONS

Detailed technical specifications for different furnace models, including AFUE, input/output ratings, and pressure ranges.

OPTIONAL ACCESSORIES - ORDER SEPARATELY

List of available optional accessories such as kits, sensors, and thermostats with their part numbers.

BLOWER DATA

Information on blower performance, speed settings, motor wattage, and cfm ratings for various operating conditions.

I-UNIT COMPONENTS

ELECTROSTATIC DISCHARGE (ESD) Precautions and Procedures

Guidelines to prevent electrostatic discharge damage to electronic components during handling.

WARNING

Critical safety warning regarding electrical hazards and integrated control repair procedures.

A- Control Box

Description of the control box components like transformer, circuit breaker, and integrated control.

INTEGRATED CONTROL CONFIGURATION GUIDE

THERMOSTAT CONNECTIONS (TB1)

Detailed terminal connections for various thermostat types, including communicating and conventional systems.

CONVENTIONAL THERMOSTAT (non-communicating)

DIP switch settings and on-board link configurations for conventional thermostat operations.

VI-MAINTENANCE

Blower Checks and Filter Maintenance

Procedures for checking blower operation, cleaning, and maintaining air filters for optimal performance.

Safety Warnings and Heat Exchanger Cleaning

Critical safety warnings and step-by-step instructions for cleaning the heat exchanger assembly.

VII- Wiring and Sequence of Operation

EL296 Schematic Diagram

Electrical schematic diagram illustrating furnace wiring and component connections for the ignition control.

Ignition Control 107045-01

Detailed wiring diagram and component identification for the ignition control module.

Electronic Ignition

Two-Stage Thermostat Heating Sequence

Describes the heating sequence when using a two-stage thermostat with the integrated control.

Safety Precautions

Critical warnings regarding wiring, circuit breakers, and aluminum wire usage.

Single-Stage Thermostat Heating Sequence

B - Heating Sequence -- Integrated Control Thermostat Selection DIP Switch 1 ON in “Single-Stage” Position

Explains the heating sequence when using a single-stage thermostat with the integrated control.

VIII- Field Wiring With Conventional and Communicating Enabled Thermostat

Communicating Enabled Furnace with a Non-Communicating Outdoor Unit

Wiring diagram for communicating furnaces with non-communicating outdoor units.

Communicating Enabled Furnace with a Communicating Enabled Outdoor Unit

Wiring diagram for communicating furnaces with communicating outdoor units.

Ignition Control 103130-05 DIP Switch Settings and On Board Links

1 Heat / 1 Cool

DIP switch and on-board link settings for 1 heat/1 cool thermostat configurations.

1 Heat / 2 Cool

DIP switch and on-board link settings for 1 heat/2 cool thermostat configurations.

1 Heat / 2 Cool with t'stat with humidity control

DIP switch and on-board link settings for 1 heat/2 cool with humidity control.

IX- Program Unit Capacity Size Modes

X- Troubleshooting

Heating Sequence of Operation Troubleshooting

Flowchart for diagnosing heating operational issues and sequences.

Cooling Sequence of Operation Troubleshooting

Flowchart for diagnosing cooling operational issues and sequences.

Continuous Fan Operation Troubleshooting

Flowchart for diagnosing issues related to continuous fan operation modes.

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