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100025
LCM SERIES
Service Literature
13 to 25 ton
45.7 to 88 kW
Revised 08/2021
LCM156U through 300U
The LCM156H, 180, 210, 240 and 300 units are configure to
order units (CTO) with a wide selection of factory installed
options.
Cooling capacities range from 13 to 25 tons (45.7 to 88 kW).
LCM156 and 180 utilize three compressors and four con
denser fans, while LCM210, 240 and 300 utilize four com
pressors and six condenser fans.
Optional electric heat is factory- or field-installed. Electric
heat operates in single or multiple stages depending on the
kW input size. 15kW to 60 kW heat sections are available
for the LCM156 and 180 units and 15 kW to 90 kW heat sec
tions are available for the LCM210, 240, 300.
Multi-Stage Air Volume MSAV
®
blower option is available.
The VFD-driven blower will operate at lower speeds when
demand is low and increase to higher speeds when demand
is high.
Variable speed VAV system is available as an option which
enables supply duct static measurement to control blower
CFM and discharge air temperature to control cooling
stages.
All LCM units are designed to accept any of several differ
ent energy management thermostat control systems with
minimum field wiring. Factory- or field-provided control op
tions connect to the unit through Smartwiret connectors.
When "plugged in" the controls become an integral part of
the unit wiring.
The CORE Control System is designed to accelerate
equipment install and service. Standard with all Model L™
rooftop units, control system integrates key technologies
that lower installation costs, drive system efficiency, and
protect your investments.
The CORE Unit Controller is a microprocessor-based con
troller that provides flexible control of all unit functions.
Information contained in this manual is intended for use by
qualified service technicians only. All specifications are sub
ject to change. Procedures outlined in this manual are pre
sented as a recommendation only and do not supersede or
replace local or state codes.
If the unit must be lifted for service, rig unit by attaching four
cables to the holes located in the unit base rail (two holes at
each corner). Refer to the installation instructions for the proper
rigging technique.
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 qualified installer or service
agency.
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.
Table of Contents
Options / Accessories Page 2.....................
Specifications Page 6............................
Blower Data Page 9.............................
Electrical / Electric Heat Data Page 12..............
Electric Heat Capacities Page 17...................
Unit Parts Arrangement Page 18...................
I-Unit Components Page 18.......................
II-Charging Page 33..............................
III-Start Up - Operation Page 35....................
IV-System Service Checks Page 35................
V-Maintenance Page 35..........................
VI-Accessories Page 36...........................
VII-Hot Gas Re-Heat Page 40......................
VIII-Staged Blower Page 44.......................
IX- VAV System Page 46.........................
X-Wiring and Operation Sequence Page 48..........
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