Page 1
02/12
*2P0212*
506894−01
*P506894-01*
E
2012 Lennox Industries Inc.
Dallas, Texas, USA
UPFLOW
HORIZONTAL LEFT
HORIZONTAL RIGHT
AIR FLOW
AIR FLOW
AIR FLOW
INSTALLATION
INSTRUCTIONS
EL280UH
ELITE
®
SERIES GAS FURNACE
UPFLOW / HORIZONTAL AIR DISCHARGE
506894−01
02/2012
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 manuals, be alert
to the potential for personal injury or death.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person-
al injury or loss of life. Installation and service must
be performed by a licensed professional installer (or
equivalent), service agency or the gas supplier.
CAUTION
As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal
edges. Be careful when you handle this equipment.
Table of Contents
Unit Dimensions
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Arrangement
3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EL280UH Gas Furnace
4
. . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping and Packing List
4
. . . . . . . . . . . . . . . . . . . . . . . .
Safety Information
4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Use of Furnace as a Construction Heater
5
. . . . . . . . . . .
General
5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion, Dilution & Ventilation Air
6
. . . . . . . . . . . . . .
Setting Equipment
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filters
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Duct System
12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Venting
13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Piping
23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical
25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrated Control
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Start−Up
32
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Pressure Adjustment
33
. . . . . . . . . . . . . . . . . . . . . . . .
High Altitude
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Proper Combustion
33
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Other Unit Adjustments
35
. . . . . . . . . . . . . . . . . . . . . . . . . .
Sequence of Operation
36
. . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Performance Data
37
. . . . . . . . . . . . . . . . . . . . . . . .
Service
39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Planned Service
42
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair Parts List
42
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrated Control Diagnostic Codes
43
. . . . . . . . . . . . . . .
Troubleshooting
44
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litho U.S.A.
