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MECHANICAL SPECIFICATIONS
General
System
LG single zone four-way ceiling cassette system comprises of a
single frame outdoor unit connected to a single indoor unit with a
single refrigerant circuit. An LG single zone four-way ceiling cassette
is a 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
maintained. LG components are manufactured in a facility registered
to ISO 9001 and ISO 14001, which is a set of standards applying
to environmental protection set by the International organization
for Standardization (ISO). The system components comply with
CSA Standard for Safety and bear the CSA 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 Standard 210 / 240
certified product directory.
9,000 and 12,000 Btu/h Ceiling Cassette Temperature
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 cool-
ing; 61°F to 86°F (WB) for heating.
18,000, 24,000, 36,000, and 42,000 Btu/h Ceiling Cassette
Temperature Operating Ranges
• Operating ranges for outdoor units of 5°F to +118°F (DB) for cool-
ing (Cooling range can be extended from 5°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 cool-
ing; 61°F to 86°F (WB) for heating.
Refrigerant System
The 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,
including 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.
8 | PRODUCT DATA
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Electrical
The system was designed to
operate using 208–230/60/1
power with voltage variances
of ±10% and includes
overcurrent protection.
The indoor unit is powered
through the outdoor unit.
Controls
Indoor and outdoor units are
factory wired with necessary
electrical control components,
printed circuit boards,
thermistors, sensors, terminal
blocks, and lugs for power
wiring. Factory installed
microprocessor controls in
the outdoor unit and indoor
unit perform functions to
efficiently operate the single zone system, communicating via a 14
AWG four-conductor, stranded, shielded or unshielded (if shielded,
must be grounded to the chassis at the outdoor unit only) power/
transmission cable (and must comply with applicable local and
national codes. Microprocessor-based algorithms provide component
protection, soft-start capability, refrigeration system pressure,
temperature, defrost, and ambient control. System can be operated
through a handheld wireless controller supplied with the four-way
ceiling cassette indoor unit.
Outdoor Unit
Sound Levels
The outdoor units have sound levels not exceeding 54 dB(A) tested
in an anechoic chamber under ISO Standard 3745.
Casing / Frame
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.
Compressors
The 9,000 ~ 24,000 Btu/h outdoor units are equipped with one
hermetically sealed, digitally controlled, inverter-driven twin rotary
compressor to modulate capacity (modulation in 1 Hz increments).
The 36,000 and 42,000 Btu/h outdoor units are equipped with
one hermetically sealed, digitally controlled, inverter-driven scroll
compressor to modulate capacity (modulation in 1 Hz increments).
Teflon coated bearings, overcurrent protection and vibration isolation
are integrated with the compressor.
Figure 2: Four-Way Ceiling Cassette
System (LC098HV and LC128HV
Models).
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