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MECHANICAL SPECIFICATIONS
Ceiling-Concealed Ducted System
General
System
LG single zone ceiling-concealed ducted system comprises of a
single frame outdoor unit connected to a single indoor unit with a
single refrigerant circuit. An LG single zone ceiling-concealed ducted
system 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 Underwriters Laboratories (UL) 1995
Heating and Cooling Equipment Standard for Safety and bear the
CSA label. Wiring in these units are in accordance with the national
Electrical Code (NEC). LG single zone ceiling-concealed ducted
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.
Outdoor Unit
The outdoor unit has sound levels not exceeding 54 dB(A) tested in
an anechoic chamber under ISO Standard 3745.
Indoor Unit
Ceiling-Concealed Ducted units are designed for air volume against
an external static pressure up to 0.59"WG for the 24,000 Btu/h and
36,000 Btu/h model.
Temperature Ranges
9,000 and 12,000 Btu/h Low Static Operating Ranges
• Operating ranges for outdoor units of 0°F to +118°F (DB) for
cooling (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, and 36,000 Btu/h Low Static Operating
Ranges
• Operating ranges for outdoor units of 5°F to +118°F (DB) for
cool ing; -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.
• Cooling range can be extended from 5°F down to -4°F using the
Low Ambient Wind Baffle Kit (sold separately).
8 | DUCTED
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
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 casing is designed to mount fully concealed above
a finished ceiling. Casing is manufactured of galvanized steel plate.
Cold surfaces of the unit are covered internally with a coated poly-
styrene insulating material, and covered externally with sheet insula-
tion made of ethylene propylene diene monomer (M-Class) (EPDM).
External insulation is plenum rated and conforms to ASTM Standard
D-1418. Hanger brackets are included on the casing to support the
weight on four corners. The indoor unit has a front horizontal supply
air discharge, and one dedicated rear horizontal return air. The
supply air opening is flanged to accept field-installed ductwork that
must not exceed the external static pressure limitation of the unit.
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.
Figure 3: Ceiling-Concealed Ducted
System (LH248HV4 High Static Model).
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