Lennox ELITE EL280UH(X)E Series - User Manual

Page 1
INSTALLATION
INSTRUCTIONS
EL280UH(X)E
507908-02
04/2024
Supersedes 01/2023
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.
IMPORTANT
DO NOT use the heat exchanger bracket to lift, drag
or pull the furnace to its installation location. Doing so
will loosen the bracket causing noise and or unsafe
operation.
Bracket
© 2024 Lennox Industries Inc.
Dallas, Texas USA
ELITE
®
SERIES GAS FURNACE
UPFLOW / HORIZONTAL AIR DISCHARGE
Contents
Unit Dimensions - inches (mm) ......................................2
EL280UH(X)E Gas Furnace ........................................... 3
Shipping and Packing List ..............................................3
Safety .............................................................................3
Use of Furnace as a Construction Heaterl .....................4
General ...........................................................................4
Combustion, Dilution, Ventilation Air...............................5
Setting Equipment ..........................................................8
Filters ............................................................................ 11
Duct System .................................................................12
Venting..........................................................................13
Gas Piping ....................................................................21
Electrical .......................................................................23
Integrated Control .........................................................30
Unit Start-Up .................................................................32
Gas Pressure Measurement.........................................35
Proper Combustion.......................................................36
High Altitude .................................................................36
Other Unit Adjustments.................................................37
Sequence of Operation.................................................37
Service..........................................................................39
Repair Parts List ...........................................................41
Start-Up & Performance Check List .............................42
Blower Data ..................................................................43
OFF
ONON
CC
CC
HIHI
II
II
LOLO
HIHI

Lennox ELITE EL280UH(X)E Series Specifications