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Page 3

CAUTION

Before attempting to perform any service or mainte­
nance, turn the electrical power to unit OFF at the
disconnect switch.

NOTICE

Any additions, changes, or conversions required in
order for the appliance to satisfactorily meet the ap­
plication needs must be made by a licensed profes­
sional installer (or equivalent) using factory-speci­
fied 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 ma­
terial 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 clear­
ances 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 heat­
er), is installed.

 When return air is drawn from a room,

a negative pressure is created in the room. If a gas ap­
pliance 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

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.

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.

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. Proper maintenance is criti­
cal for your safety and the satisfactory operation of the
product. 

Lennox strongly recommends annual in­

spection and maintenance of this appliance.

 Contact

your Lennox dealer for an inspection by a licensed profes­
sional  service technician (or equivalent).

Summary of Contents for EL180UHNE Series

Page 1: ...phone in your building 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 D Leave the building immediately GAS FURNACE FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exact ly could result in serious injury death or property damage WARNING Improper installation adjustment al...

Page 2: ...t 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 activated furnace operation will stop If your home is left unattended for an extended period of time equipment op eration 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 Th...

Page 3: ...re operating Gas fumes which could contain carbon monoxide can be drawn into the living space resulting in personal injury or death 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 combusti...

Page 4: ... 2 Set the thermostat to the lowest setting 3 Turn off all electrical power to the unit 4 This furnace is equipped with an ignition device which automatically lights the burners Do not try to light the burners by hand 5 Remove the upper access panel 6 Move switch on gas valve to OFF See figure 3 7 Wait five minutes to clear out any gas If you then smell gas STOP Immediately call your gas supplier ...

Page 5: ...ce 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 CAUTION To ensure proper operation a licensed professional service technician or equivalent should check the burner flame and conduct a combustion analysis annually Annually before heating season...

Page 6: ...WARNING Do not use this furnace if any part has been under water A flood damaged furnace is extremely dan gerous Attempts to use the furnace can result in fire or explosion Immediately call a licensed pro fessional service technician or equivalent to in spect the furnace and to replace all gas controls control system parts and electrical parts that have been wet or to replace the furnace if deemed...

Page 7: ...plete combustion analysis during the fur nace inspection to ensure proper combustion and oper ation Consult Service Literature for proper combustion values 12 Verify operation of smoke detectors and CO detectors and replace batteries as required Perform a general system test Turn on the furnace to check operating functions such as the start up and shut off operation 1 Check the operation of the ig...

Page 8: ...ller or equivalent service agency or gas supplier Cabinet Parts Access panel Blower panel Top cap Control Panel Parts Transformer Integrated control Door interlock switch Circuit breaker Blower Parts Blower wheel Blower housing Motor Motor mounting frame Motor power choke Blower housing cutoff plate Heating Parts Flame sensor Heat exchanger assembly Gas manifold Combustion air inducer Gas valve Ma...

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