Lennox International Inc. EL280UH User Manual
E 2012 Lennox Industries Inc.
Dallas, Texas, USA
506895−01
02/2012
EL280UH
SERIES
GAS FURNACE
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 installer (or
equivalent), a service agency, or the gas supplier.
FIRE OR EXPLOSION HAZARD.
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.
Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
Litho U.S.A.
WARNING
WHAT TO DO IF YOU SMELL GAS:
D Do not try to light any appliance.
D Extinguish any open flames.
D Do not touch any electrical switch; do not use any
phone in your building.
D Leave the building immediately.
D Immediately call your gas supplier from a neighbor’s
phone. Follow the gas supplier’s instructions.
D If you cannot reach your gas supplier, call the fire
department.
02/12
*2P0112*
506895−01
*P506895-01*
EL280UH Parts Identification
COMBUSTION AIR
INDUCER
COMBUSTION AIR INDUCER
PRESSURE SWITCH
BURNER BOX
ASSEMBLY
HEAT EXCHANGER
ASSEMBLY
GAS VALVE
ACCESS PANEL
FIGURE 1
NOTE − This manual is the property of the homeowner
and must be left with the equipment user.
Notice to Homeowner
This furnace is equipped with safety devices that protect
you and your property. If one or more of these devices is
BLOWER
MOTOR
®
INTEGRATED CONTROL
SURELIGHT
activated, furnace operation will stop. If your home is left
unattended for an extended period of time, equipment operation must be checked periodically. If this is not possible,
the water supply to the house should be shut off and the
pipes should be drained. This will prevent problems associated with a NO HEAT condition (frozen pipes, etc.)
Page 2
CAUTION
Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at the
disconnect switch.
NOTICE
Your furnace is a gas appliance. It is critical that the gas
supplied to the unit be completely burned to avoid the pro-
duction of carbon monoxide gas. Complete combustion of
the gas requires, but is not limited to, correct gas pressure
and gas flow rate, adequate combustion air and proper
venting.
Any additions, changes, or conversions required in
order for the appliance to satisfactorily meet the application needs must be made by a licensed professional installer (or equivalent) using factory−specified and approved parts.
Safety Instructions
1 − Keep the furnace area clear and free of combustible
material, gasoline, and other flammable vapors and
liquids. If it is installed in an insulated area, the furnace
must be kept free of insulating material. Insulating material may be combustible.
2 − DO NOT obstruct air flow to unit. Unit must receive an
unobstructed flow of combustion and ventilating air.
DO NOT block or obstruct air openings on the furnace
or air openings to the area in which the furnace is
installed. Take care to maintain established clearances surrounding the furnace.
3 − DO NOT store chlorine or fluorine products near unit
or introduce these products into the combustion air.
These products can cause furnace corrosion.
4 − DO NOT draw return air from a room where this fur-
nace, or any other gas appliance (ie., a water heater), is installed. When return air is drawn from a room,
a negative pressure is created in the room. If a gas appliance is operating in a room with negative pressure,
the flue products can be pulled back down the vent
pipe and into the room. This reverse flow of the flue
gas may result in incomplete combustion and the
formation of carbon monoxide gas. This toxic gas
might then be distributed throughout the house by the
furnace duct system.
WARNING
Asphyxiation Hazard
The exhaust vent for this furnace must be leak−free
and must be securely connected to the furnace flue
collar at all times.
For your safety and to fulfill the terms of the limited
warranty, a licensed professional service technician
(or equivalent) must annually inspect this furnace
and its vent system.
Exposure to carbon monoxide gas can cause personal inju-
ry and even death to all occupants, including pets. Any item
that is powered by, or gives off heat from, a combustion pro-
cess (including lawn mowers, automobiles, and fireplaces)
has the potential to produce carbon monoxide gas. Because
of this, Lennox recommends the use of a carbon monox-
ide detector in your home, even if you do not own gas
appliances. Reliable detectors are available at reasonable
retail prices. Contact your Lennox dealer for more details
about this investment in your safety.
Your furnace is designed to meet standards set by nation-
al agencies, and to operate safely when properly installed
and maintained. However, the unit’s performance can be
greatly impacted by the individual installation and the op-
erating environment. It is your responsibility to ensure that
this appliance is maintained.
WARNING
The blower door must be securely in place when the
blower and burners are operating. Gas fumes, which
could contain carbon monoxide, can be drawn into
the living space resulting in personal injury or death.
Page 3
Proper maintenance is critical for your safety and the satisfactory operation of the product. Lennox strongly rec-
ommends annual inspection and maintenance of this
appliance. Contact your Lennox dealer for an inspection
by a licensed professional service technician.
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