74 | REFRIGERANT DESIGN
Single Zone High Efciency and Standard Wall Mount Engineering Manual
Due to our policy of continuous product innovation, some specications may change without notication.
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LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG ” is a registered trademark of LG Corp.
MECHANICAL SPECIFICATIONS
General
LG Single Zone High Efficiency, Single Zone
Standard and Single Zone Extended Pipe
systems are comprised of a single outdoor
unit connected to a single indoor unit with a
single refrigerant circuit.
These single zone systems can operate in
either cooling or heating mode. These
systems are capable of changing mode
within a maximum time of three (3) minutes
to ensure temperature can be properly
maintained.
LG components are manufactured in a facil-
ity registered to ISO 9001 and ISO 14001,
which is a set of standards applying to envi-
ronmental protection set by the International
Organization for Standardization (ISO). The
units are listed by Intertek Electrical Testing
Laboratories (ETL) and bear the ETL label.
Wiring in these units are in accordance with
the National Electrical Code (NEC).
Temperature Ranges
Outdoor Unit
Operating ranges for outdoor units of 14°F
to 118°F DB for cooling and -4°F to 75°F
WB for heating.
Indoor Unit
Operating ranges for indoor units of 64°F to
90°F WB for cooling and 60°F to 86°F DB
for heating.
Installing an optional Low Ambient Wind
Baffle Kit will allow operation down to 0°F in
cooling mode for all single zone systems.
Casing / Frame
Outdoor unit is constructed with pre-coated
metal (PCM).
Indoor unit is constructed of heavy duty Ac-
rylonitrile Butadiene Styrene (ABS) and High
Impact Polystyrene (HIPS) plastic.
Refrigerant System
The refrigeration system consists of a single
refrigeration circuit and uses R410A refriger-
ant. The outdoor unit is provided with factory
installed components, including a refrigerant
strainer, four-way reversing valve, electronic
controlled expansion valve (EEV), high and
low side charging ports, service valves, and
interconnecting piping.
Refrigeration Oil Control
Heat pump outdoor units have a centrifugal
oil separator and controls to ensure suf-
ficient oil supply is maintained, and that oil
does not travel with the refrigerant.
Compressors
The outdoor unit is equipped with one
hermetic digitally controlled inverter driven
rotary (9k/12k Btu/h systems) or twin rotary
(18k/24k/30k/36k Btu/h systems) compres-
sor to modulate capacity (modulation in 1 Hz
increments).
Frequency ranges for the outdoor units are
as follows:
LSU091HSV3, LSU121HSV3, LSU181HSV3
= 15-100 Hz
LSU240HSV3 = 20-100 Hz
LSU307HV3, LSU360HV3 = 20-100 Hz
LSU240HLV, LSU300HLV, LSU360HLV =
10-100 Hz.
Overcurrent protection and vibration isolation
are integrated with the compressor.
Outdoor Unit Coil
Heat pump outdoor unit coils are made of a
nonferrous construction with louvered fins
on copper tubing, and are protected with an
integral coil guard. Coil fans have a factory
applied corrosion resistant GoldFin
TM
mate-
rial with hydrophilic coating.
Fans and Motors
The outdoor unit includes one direct fan
drive, variable speed variable speed
propeller type fan.
The Brushless Digitally Controlled (BLDC)
fan motor shall have inherent protection,
permanently lubricated bearings, and
variable speed with a maximum speed up to
950 rpm. Raised guards are provided to limit
contact with moving parts.
The outdoor unit has horizontal discharge
airflow.
Electrical
These units are available in 208-230V, 60
Hz, 1-phase power supply. These units are
capable of operating within voltage limits of
± 10% rated voltage, and include
overcurrent protection.
Controls
These units are factory wired with necessary
electrical components, integral microproces-
sors, printed circuit boards, thermistors,
sensors, terminal blocks, and lugs for power
wiring.
Microprocessor-based algorithms provide
component protection, soft-start capability,
refrigeration system pressure, temperature,
defrost, and ambient control.
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