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MECHANICAL SPECIFICATIONS
Four-Way Ceiling Cassette System
Figure 70: Four-Way Ceiling Cassette
System (LC187HV, LC247HV Models).
General
System
LG single zone four-way ceiling cassette system comprises of a sin-
gle frame outdoor unit connected to a single indoor unit with a single
refrigerant circuit. An LG single zone four-way ceiling cassette is a
DFS system that can operate in either cooling or heating mode. The
system is capable of changing mode within a maximum time of three
(3) minutes to ensure indoor temperature can be properly main-
tained. LG components are manufactured in a facility registered to
ISO 9001 and ISO 14001, which is a set of standards applying to en-
vironmental protection set by the International organization for Stan-
dardization (ISO). The system components comply with Underwriters
Laboratories (UL) 1995 Heating and Cooling Equipment Standard
for Safety and bear the Electrical Testing Laboratories (ETL) label.
Wiring in these units are in accordance with the national Electrical
Code (NEC). LG single zone four-way ceiling cassette systems have
published performance ratings certified by AHRI (Air-Conditioning,
Heating, and Refrigeration Institute) and are listed in the AHRI Stan-
dard 210/240 certified product directory.
Outdoor Unit
The outdoor units have sound levels not exceeding 54 dB(A) tested
in an anechoic chamber under ISO Standard 3745.
Indoor Unit
The indoor units have sound ratings no higher than 46 dB(A) as
tested per ISO Standard 3745.
Temperature Ranges
9,000 and 12,000 Btu/h Ceiling Cassette Operating Ranges
• Operating ranges for outdoor units of 0°F to +118°F (DB) for cool-
ing (Cooling range can be extended from 0°F down to -4°F using
the Low Ambient Wind Baffle Kit [sold separately]); -4°F to +64°F
(WB) for heating.
• Operating ranges for indoor units of 57°F to 77°F (WB) for cooling;
59°F to 81°F (DB) for heating.
• Indoor unit temperature setting range of 65°F to 86°F (DB) for
cooling; 61°F to 86°F (WB) for heating.
18,000, 24,000, 36,000, and 42,000 Btu/h Ceiling Cassette
Operating Ranges
• Operating ranges for outdoor units of 5°F to +118°F (DB) for cool-
ing; 0°F to +64°F (WB) for heating.
• Operating ranges for indoor units of 57°F to 77°F (WB) for cooling;
59°F to 81°F (DB) for heating.
• Indoor unit temperature setting range of 65°F to 86°F (DB) for
cooling; 61°F to 86°F (WB) for heating.
Casing / Frame
Outdoor Unit
The outdoor condensing unit case is constructed from pre-coated
metal (PCM) that has been tested in accordance with ASTM B-117
salt spray procedure for a
minimum of 1,000 hours.
Case has a removable panel
to allow access to major
internal components, and
legs to secure the unit during
installation.
Indoor Unit
The indoor unit case is con-
structed of a galvanized steel
plate designed to recess in
the ceiling, and has a surface
mounted concentric grille on
the bottom of the unit. Unit
has four supply air outlets
and one return air inlet. The
supply air outlet has four-
directional slot diffusers, each
equipped with an independent
oscillating motorized guide vane to change airflow direction. A guide
vane algorithm sequentially changes the predominant discharge
airflow direction in counterclockwise pattern, or can be used to lock
each guide vane independently in a field-adjusted fixed position.
The four vanes can be individually adjusted from the wired remote
controller to customize the airflow pattern for the conditioned space.
A setting in the cooling and heating modes can cycle the vanes up
and down for uniform / random air distribution.
A required architectural grille is sold as a separate required acces-
sory. The four-way grille is off-white acrylonitrile butadiene styrene
(ABS) polymeric resin with a tapered trim edge.
Refrigerant System
System is designed for use with R410A refrigerant, and consists of a
single refrigeration circuit. The refrigeration circuit is pressure-tested
at the factory and shipped with a holding charge of helium gas. The
outdoor unit is provided with factory installed components, includ-
ing a refrigerant strainer, accumulator, four-way reversing valve,
electronic expansion valve (EEV), high and low side charging ports,
service valves, and interconnecting piping. All refrigerant lines from
the outdoor unit to the indoor unit are field-installed and must be
insulated separately.
Compressors
The outdoor unit is equipped with one hermetically sealed, digitally
controlled, inverter-driven twin rotary compressor to modulate capac-
ity (variable from 20 to 100 Hz, modulate in 1 Hz increments). Teflon
coated bearings, overcurrent protection and vibration isolation are
integrated with the compressor.
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
FOUR-WAY CASSETTE | 77
Electrical Connections and Mechanical Specs
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