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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 Specications...........................................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.
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