Lennox EL296DF070XV48B User Manual

Page 1
UNIT INFORMATIONUNIT INFORMATION
Service Literature
©2016 Lennox Industries, Inc.
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.
EL296DFV(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. EL296DFV(X) units are available in
heating capacities of 44,000 to 110,000 Btuh and cooling
applications up to 5 tons. Refer to Engineering Handbook
for proper sizing.
Units are factory equipped for use with natural gas. Kits
are available for conversion to LPG operation. EL296D-
FV(X) model units are equipped with a communicating
enabled SureLight
®
two-stage variable speed integrated
control.
EL296DFV(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
I Unit Components . . . . . . . . . . . . . . . . . . . . . . . . Page 9
II Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 39
III Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 63
IV Heating System Service Checks . . . . . . . . . Page 64
V Typical Operating Characteristics . . . . . . . . . Page 67
VI Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . Page 67
VII Wiring and Sequence of Operation . . . . . . Page 70
VIII Field Wiring and Jumper Settings . . . . . . . Page 73
IX Program Unit Capacity Size Mode . . . . . . . Page 87
X Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . Page 88
EL296DFV(X)
Corp 1126-L5
Revised 03/2022
COMMUNICATING - ENABLED EL296DFV SERIES UNITS

Lennox EL296DF070XV48B Specifications

General

Model	EL296DF070XV48B
Type	Gas Furnace
Efficiency Rating	96% AFUE
Stages	Two-Stage
Blower Motor	Variable Speed
Vent Type	Direct Vent
Fuel Type	Natural Gas
Warranty	Limited Lifetime Heat Exchanger
Heating Capacity	70, 000 BTU/h

Summary

II-PLACEMENT AND INSTALLATION

Pipe & Fittings Specifications

Specifies approved piping and fitting materials for furnace installations.

Venting Options

Details options for furnace venting configurations and modifications.

III-START-UP

A-Preliminary and Seasonal Checks

Pre-start-up checks of electrical, condensate, and seasonal components.

B-Heating Start-Up

Procedures for initiating heating operation, including gas valve usage.

Gas Valve Operation

Instructions for operating the gas valve and safety precautions.

Failure To Operate

Troubleshooting steps for common furnace operation failures.

IV-HEATING SYSTEM SERVICE CHECKS

A-CSA Certification

States that units are CSA design certified without modifications.

B-Gas Piping

Covers gas piping requirements, torque limits, and pressure considerations.

C-Testing Gas Piping

Details procedures for testing gas lines and safety requirements.

D-Testing Gas Supply Pressure

Explains how to measure inlet and manifold gas supply pressures.

E-Check Manifold Pressure

Steps to measure manifold pressure and adjust if necessary.

F- Proper Gas Flow

Procedure for checking gas flow rate and comparing it to standards.

V-TYPICAL OPERATING CHARACTERISTICS

A-Blower Operation and Adjustment

Explains blower operation based on thermostat settings and adjustments.

B-Temperature Rise

Details how to calculate and check temperature rise for unit operation.

C-External Static Pressure

Instructions for measuring and setting external static pressure.

X- Troubleshooting

Troubleshooting: Heating Sequence of Operation

Analyzes the heating sequence to identify operational issues.