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Lennox EL196UH045XE36B User Manual

Lennox EL196UH045XE36B
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Page 1
INSTALLATION
INSTRUCTIONS
EL196UHE
507764-05
04/2020
Supersedes 507764-04
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.
© 2020 Lennox Industries Inc.
Dallas, Texas USA
ELITE
®
SERIES GAS FURNACE
UPFLOW / HORIZONTAL AIR DISCHARGE
Contents
Unit Dimensions - inches (mm) ......................................2
EL196UHE......................................................................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 ............................................................................13
Duct System .................................................................13
3LSH)LWWLQJV6SHFL¿FDWLRQV...........................................13
Joint Cementing Procedure ..........................................16
Venting Practices ..........................................................16
Gas Piping ....................................................................36
Electrical .......................................................................39
Unit Start-Up .................................................................42
Gas Pressure Measurement.........................................44
Proper Combustion.......................................................44
High Altitude .................................................................44
Testing Combustion Air For Non-Dierct Vent ................46
Other Unit Adjustments.................................................46
Service..........................................................................48
Repair Parts List ...........................................................49
Start-Up Checklist.........................................................51
Blower Data ..................................................................53

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Lennox EL196UH045XE36B Specifications

General IconGeneral
ModelEL196UH045XE36B
BrandLennox
Efficiency Rating96% AFUE
Heating Capacity45, 000 BTU
Blower MotorVariable Speed
Ignition TypeDirect Spark Ignition
StagesTwo-stage
Fuel TypeNatural Gas
Blower Motor TypeECM
Input BTU45, 000 BTU
Output BTU43, 200 BTU
TypeFurnace
WarrantyLimited Lifetime Warranty on Heat Exchanger, 5-Year Limited Warranty on Parts

Summary

Furnace Installation Basics

Safety Information

Crucial safety warnings and precautions for installation and operation.

Installation Locations

Combustion Air Requirements

Setting Equipment

Installation Clearances

Horizontal Installation Setup

Pipe and Fittings Specifications

Venting Procedures

Exhaust and Intake Piping

Piping Sizing Process

Typical Vent Pipe Connections

Intake Piping

General Vent Termination Guidelines

Vent Termination Clearances

Intake and Exhaust Piping Terminations

Condensate Piping and Traps

Gas Piping Installation

Gas Piping Safety Warnings

Critical safety warnings regarding gas piping installation hazards.

Common Vent System Procedures

Removal from Common Vent Safety

Hazard warning for carbon monoxide poisoning during venting.

Electrical Installation

Electrical Safety Warnings

Warnings about electrical shock, fire, and explosion hazards.

Wiring Diagram

Diagram showing typical electrical connections for the furnace.

Unit Start-Up Procedures

Start-Up Safety Warnings

Warning about using a furnace that has been underwater.

Gas Valve Operation

Step-by-step instructions for operating the gas valve safely.

Heating Sequence of Operation

Describes the sequence of events during the heating cycle.

Gas Flow and Pressure Checks

Supply Pressure Measurement

How to measure and check gas supply pressure.

Manifold Pressure Check

Procedure for checking manifold gas pressure.

Venting and Combustion Air Testing

Venting Test Warnings

Hazard warning for carbon monoxide poisoning during venting tests.

Furnace Operation and Maintenance

Service and Maintenance

Recommended annual maintenance tasks for the furnace system.

Start-Up and Performance Checklist

Unit Operation Overview

Blower Performance Data

General Safety Warnings

Fire or Explosion Hazard Warning

Critical warning about fire and explosion risks.

General Safety Instructions

Critical Furnace Operation Warnings

Multiple critical safety warnings for furnace operation and handling.

Furnace Operation

Placing Furnace into Operation

Steps to safely place the furnace into operation.

Operating the Gas Valve

Step-by-step guide to operating the gas valve safely.

Furnace Maintenance and System Checks

Annual Furnace Maintenance

Comprehensive guide to annual furnace maintenance procedures.

Service and Safety Precautions

General Safety Precautions

Important safety precautions to take if problems are discovered.

Thermostat User Settings

Thermostat Installation

Thermostat Installation Preparation

Installation 'DO' and 'DO NOT' Instructions

Critical 'DO NOT' instructions and warnings for thermostat installation.

Thermostat Wiring

Thermostat Installer Settings

Thermostat System Setup

Thermostat Configuration and Testing

Thermostat Diagnostic Information

Thermostat Installation Checklist

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