Lennox EL180UH040NE36A, Unit Information

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Page 1
©
2019 Lennox Industries Inc.
EL180UHNE
Service Literature
Corp. 1803-L1
Revised 10/2019
EL180UHNE series units are mid-efficiency gas furnaces
used for upflow or horizontal applications only, manufac­
tured with Lennox Duralok
t
heat exchangers formed of
aluminized steel. EL180UHNE units are available in heat­
ing capacities of 40,000 to 100,000 Btuh and cooling ap­
plications 2 to 5 tons. Refer to Engineering Handbook for
proper sizing.
EL180UHNE model units are equipped with a hot surface
ignition system. The EL180UHNE unit meets the new Cali­
fornia 14 ng/J Nitrogen Oxides (NO
x
) Standards and Califor­
nia Seasonal Efficiency requirements. All units use a redun­
dant 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.
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.
TABLE OF CONTENTS
Specifications Page 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Data Page 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Identification Page 5 . . . . . . . . . . . . . . . . . . . . . . . . .
I Unit Components Page 6 . . . . . . . . . . . . . . . . . . . . . . . .
II Installation Page 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
III Start Up Page 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IV Heating System Service Checks Page 17 . . . . . . . . .
V Typical Operating Characteristics Page 21 . . . . . . . . .
VI Maintenance Page 21 . . . . . . . . . . . . . . . . . . . . . . . . . .
VII Wiring and Sequence of Operation Page 24 . . . . . .
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.
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.