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©
2017 Lennox Industries Inc.
EL180DFE
Service Literature
Corp. 1301-L1
Revised 09/2017
EL180DFE series units are mid-efficiency gas furnaces
used for downflow applications only, manufactured with
Lennox Duralok
t
heat exchangers formed of aluminized
steel. EL180DFE units are available in heating capacities
of 44,000 to 110,000 Btuh and cooling applications 1.5 to 5
tons. Refer to Engineering Handbook for proper sizing.
Units are factory equipped for use with natural gas. Kits are
available for conversion to LP/Propane operation.
EL180DFE model units are equipped with a hot surface igni
tion system and a constant torque ECM motor. The motor is
programmed to provide constant torque at each of the five
selectable speed taps. All units use a redundant gas valve to
assure safety shut-off as required by C.S.A.
All specifications in this manual are subject to change. Pro
cedures outlined in this manual are presented as a recom
mendation only and do not supersede or replace local or
state codes. In the absence of local or state codes, the
guidelines and procedures outlined in this manual (except
where noted) are recommended only and do not constitute
code.
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 HVAC in
staller (or equivalent), service agency or the gas sup
plier.
TABLE OF CONTENTS
Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Data
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Identification
. . . . . . . . . . . . . . . . . . . . . . . . .
I Unit Components
. . . . . . . . . . . . . . . . . . . . . . . .
II Installation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
III Start Up
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IV Heating System Service Checks
. . . . . . . . .
V Typical Operating Characteristics
. . . . . . . . .
VI Maintenance
. . . . . . . . . . . . . . . . . . . . . . . . . .
VII Wiring and Sequence of Operation
. . . . . .
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at discon
nect switch(es). Unit may have multiple
power supplies.
WARNING
Fire Hazard. Use of aluminum wire with this
product may result in a fire, causing property dam
age, severe injury or death. Use copper wire only
with this product.
CAUTION
Failure to use properly sized wiring and circuit
breaker may result in property damage. Size wiring
and circuit breaker(s) per Product Specifications
bulletin (EHB) and unit rating plate.
CAUTION
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal in
jury. Take care while handling this equipment and
wear gloves and protective clothing.
