8|   PRODUCT DATA
Single Zone Extended Piping Wall Mounted Engineering Manual
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MECHANICAL SPECIFICATIONS
General
LG Single Zone Wall Mounted Extended 
Piping 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 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). 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 65°F 
WB for heating.
Indoor Unit
Operating ranges for indoor units of 53°F to 
75°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 
Acrylonitrile Butadiene Styrene (ABS) and 
High Impact Polystyrene (HIPS) plastic.
Refrigerant System
The refrigeration system consists of a 
single refrigeration circuit and uses R410A 
refrigerant. 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 sufficient 
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 
twin rotary compressor to modulate capacity 
(modulation in 1 Hz increments).
Frequency ranges for the outdoor units are 
as follows:
LSU243HLV3: 10 Hz ~ 70 Hz for Cooling;  
10 Hz ~ 100 Hz for Heating.
LSU303HLV3: 10 Hz ~ 60 Hz for Cooling;  
10 Hz ~ 90 Hz for Heating.
LSU363HLV3: 10 Hz ~ 64 Hz for Cooling;  
10 Hz ~ 90 Hz for Heating.
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 fins have a 
factory applied corrosion resistant GoldFin
TM
 
material with hydrophilic coating. Outdoor 
units include factory-installed drain pan 
heaters.
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 included 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
The indoor unit casing has a factory-
standard, integral, infrared sensor designed 
to communicate with the supplied LG 
wireless handheld remote controller. An 
optional LG supplied wired controller is 
available as an additional accessory. 
Communication between the indoor unit and 
the outdoor unit is accomplished through 14 
AWG four-core, stranded, shielded power / 
communication cable. 
HLV3 indoor units have built-in Wi-Fi and 
can be controlled by LG’s Smart ThinQ™ 
app on a smartphone. A field-supplied Wi-Fi 
network and smart device are required. The 
Smart ThinQ app is free, and is available for 
Android™ and iOS. (Android is a trademark 
of Google LLC.)
Figure 3: LS303HLV3 and LS363HLV3 Ex-
tended Piping Wall Mounted System.
Extended Piping Wall Mounted System