LG Multi V VRF Systems: Indoor Units

About LG

LG Electronics USA, Inc., based in Englewood Cliffs, New Jersey, is the North American subsidiary of LG Electronics, Inc., a global force and technology leader. LG Electronics, recognized as an ENERGY STAR® Partner of the Year for many years, offers a range of stylish and innovative home entertainment products, home appliances, commercial displays, air conditioning systems, and solar energy solutions in the United States, all under LG's "Life's Good" marketing theme. For more news and information, visit www.LG.com.

The LG Electronics USA Air Conditioning Technologies business, headquartered in Alpharetta, Georgia, is a leading player in the global air conditioning market. LG manufactures commercial and residential air conditioners and provides comprehensive sustainability and building management solutions. LG offers a wide array of products for heating, ventilating, and air conditioning, from consumer units to industrial and specialized systems. For more information, visit www.lghvac.com.

About LG VRF

A Variable Refrigerant Flow (VRF) system utilizes a single refrigerant circuit connecting multiple indoor units to one outdoor unit. VRF systems offer a superior method for heating and cooling any space, providing enhanced humidity control, individual set points for each indoor unit, and a very quiet comfort experience. In heat recovery configurations, VRF systems enable simultaneous heating and cooling in different zones, further boosting energy savings and occupant comfort. These systems are energy-efficient, easy to design, install, and maintain, resulting in a low life cycle cost compared to other market systems.

Why LG VRF?

LG VRF systems offer numerous benefits, including simplified installation with less piping, energy efficiency for owners, and modern indoor units that complement any interior design. LG VRF products are known for their industry-leading low sound levels, allowing for installation in noise-sensitive environments. LG's inverter scroll compressors optimize system energy efficiency.

The Multi V™ 5, with the addition of LGRED™ heating capability, delivers continuous operational performance, providing heating down to -22°F and cooling up to 122°F for all units without requiring additional accessories or modifications, making it a robust solution for diverse climates.

Key Features & Performance:

• Piping Capabilities: Supports high elevation differences and extensive total piping lengths (e.g., 3,280 ft total piping, 738 ft longest piping, 360 ft ODU-IDU height difference, 131 ft IDU-IDU height difference).
• Optimized Heat Recovery: Flexible piping layout reduces installation costs. LG Heat Recovery Units (HRUs) are quiet, compact, lightweight, and do not require condensate drains. They are configured for independent heating and cooling to ensure occupant comfort.
• Operation Range: Industry-leading operation ranges include heating from -22°F to 61°F WB and cooling from 5°F to 122°F DB. Simultaneous operation is available between 14°F and 81°F DB.
• Quiet Operation: Indoor units operate as quietly as 23 dB(A), comparable to rustling leaves, contributing to a relaxing environment. (Noise Level Comparison: 23 dB(A) for LG Low-Static Ducted Unit, 40 dB(A) for Bird Calls, 50 dB(A) for Conversation at Home, 60 dB(A) for Conversation in Restaurant, 70 dB(A) for Vacuum Cleaner).

LG VRF Advantages

Efficiency

Advanced features ensure superior efficiency:

• Advanced Smart Load Control: Automatically adjusts system target pressures based on outdoor temperature and humidity for increased cooling performance.
• Active Refrigerant Control: Dynamically adjusts refrigerant levels based on operating mode and conditions for improved part-load and heating efficiency.
• Variable Path Heat Exchanger: Adjusts refrigerant flow path and velocity for enhanced efficiency across different operating modes.
• Advanced PCB Cooling: Utilizes liquid refrigerant for improved cooling performance of the inverter PCB, replacing traditional heat sink methods.
• LG Inverter Scroll: Features an innovative high side-shell design for a more compact unit with greater reliability in cold climates.
• HiPORTM (High-Pressure Oil Return): Ensures efficient oil return to the compressor via a separate inlet pipe, optimizing compressor energy usage.
• Smart Oil Control: Eliminates timed oil-return cycles, significantly reducing oil return time compared to timed systems.
• Intelligent Heating: Monitors outdoor humidity to reduce system target pressures, extending heating operation, delaying defrost cycles, and lowering power consumption.

Performance

Expansive operating range in cooling and heating without additional accessories:

• LG Multi V 5 utilizes vapor injection technology for improved heating performance in ambient conditions as low as -22°F.
• The variable path heat exchanger in LG Multi V™ 5 enables cooling performance down to 5°F in low ambient conditions.

Comfort

• Quiet Operation: Multi V indoor units offer some of the quietest operation in the industry, with sound levels as low as 23 dB(A). This, combined with precise temperature control and dehumidification, creates a relaxing environment.
• Individualized Zone Control: Multi V systems allow precise temperature control for each space, enhancing comfort and promoting reduced power consumption.
• Indoor Air Quality: All Multi V indoor units feature a reusable, washable filter. The absence of required distribution and return ducts minimizes dust and duct mold accumulation, contributing to improved indoor air quality.

Design Flexibility

• Higher-Elevation Piping Technology (HiPORTM): Enables multi-story applications with fewer systems, reducing installation costs and eliminating heating capacity losses due to long pipe runs.
• Compact and Lightweight: Offers greater flexibility for indoor zone configurations and outdoor space utilization, providing cost advantages on larger projects.

Training and Support

Training

LG's US Air Conditioning division, based in Alpharetta, Georgia, operates a comprehensive training academy. Additional academies are located in California, Texas, and New Jersey. Since 2008, LG has trained thousands of professionals on the advantages of its air conditioning systems, with many more benefiting from online training modules. Experienced trainers provide classes on duct-free technology, covering installation to service for LG's air conditioning products. LG maintains strategically located training academies across the United States offering various training classes. For HVAC professionals, LG provides online instruction via its Learning Management System and classroom training at its academies. Training is open to all contractors; consult your LG Electronics authorized distributor for details. For more information and to register for upcoming training, visit https://lghvac.com/training.

Design and Service Tools

LG offers innovative tools to enhance service technician experience:

• LG Monitoring View (LGMV) Software and Mobile App: Connects to LG Multi V Systems for accurate troubleshooting and performance evaluation by interfacing directly with the unit. It provides real-time system status without manual temperature checks or refrigerant circuit access, streamlining troubleshooting.
• LATS HVAC: A system design tool for LG Air Conditioning Technologies systems, including Multi V, Multi F, Single Zone, and ERV. LATS CAD and LATS Revit plugins are also available for design assistance. This tool facilitates quick system design with drag-and-drop functionality, calculating critical details like output capacity and refrigerant requirements, and verifying pipe lengths against allowable tolerances. Contact your local LG representative for assistance with system design using LATS.

Indoor Unit Lineup Overview

LG indoor units offer a diverse range of styles and features to meet various cooling and heating needs. Options include ceiling-recessed cassettes, concealed ducted units, and LG's award-winning Art Cool Gallery and mirror-finished wall-mounted units, designed to complement any décor. The Multi V system provides unparalleled aesthetic design and versatile indoor unit solutions for multiple applications.

Indoor Unit Types:

• Art Cool™: Gallery, Mirror
• Wall Mounted: Standard
• Cassette: 1-Way, 2-Way, 4-Way (2'x2'), 4-Way (3'x3')
• Ceiling Suspended / Ceiling Mounted
• Ceiling Concealed Duct: Low Static, Mid Static, High Static
• Vertical AHU: Vertical/Horizontal (With Case)
• Floor Standing: (Without Case)

Outdoor Unit Lineup

LG offers a comprehensive lineup of outdoor units for various system types:

Detailed Indoor Unit Specifications

LG offers a wide variety of indoor units with detailed specifications for each model. The following sections provide capacity, power, dimensions, sound pressure, and airflow data for different unit types.

Art Cool™ Gallery

Digital Airflow Control: Airflow can be adjusted for maximum comfort and convenience (Normal, Jet Cool, Sleep Mode). The Customizable Picture Frame feature allows users to personalize the unit's appearance.

Art Cool™ Mirror

Standard Wall Mounted

1-Way Cassette and 2-Way Cassette

4-Way Cassette (2x2)

4-Way Cassette (3x3)

Ceiling Suspended

Vertical AHU

Low Static Ducted

Mid Static Ducted

High Static Ducted

Floor Standing Unit

Indoor Options and Accessories

Hydro Kit

The Hydro Kit system uses a refrigerant-to-water heat exchanger to produce chilled or heated water. It can be used for preheating domestic water, snow melt, or radiant heating systems. The K4 Hydro Kit can also supply chilled or heated water for two-pipe fan coils. LG Hydro Kits are compatible with LG Multi V 5, Multi V Water IV, and Multi V S systems.

Features & Benefits:

• Provides hot water and floor heating with less energy consumption than a boiler.
• Requires no exhaust or exhaust piping.
• Compact and easy to install.
• Compatible with LG Central controller and BMS interface.
• Offers flexible design options.

Applications:

• Universities, Offices, Schools, Hospitals
• Hotels, Retail stores, Restaurants, Multi-use facilities

Split Rooftop Unit (RTU)

Specifications for LG Split Rooftop Units (RTU) are provided, detailing capacity, power input, operating conditions, refrigerant type, and dimensions for models ARNU363DDA4, ARNU483DDA4, ARNU603DDA4, and ARNU723DDA4.

Accessories

A comprehensive list of indoor accessories is available, including:

• Cassette Auto Elevation Kit (PTEGM0)
• Cassette Cover (PTDCM)
• Cassette Grilles (PT-UTC, PT-UUC1, PT-USC, PT-QCHW0, PT-UMC1)
• Ceiling Cassette Ventilation Kits (PTVK410, PTVK420, PTVK430)
• Plasma Kits (PTPKU0, PTPKT0, PTPKM0, PTPKQ0)
• High-Capacity Filter Boxes (ZFBXM101A, ZFBXM201A, ZFBXM301A, ZFBXB801A)
• Air Cleaners (ZFBXD201A, ZFBXD402A) and Media (ZFLT1301A, ZFLT1302A)
• Return Air Plenums (ZPLMV201A, ZPLMV402A)
• Auxiliary Heat Kits (PRARH1, PRARS1, ANEH***B1, ANEH***B2 series)
• Wi-Fi Module (PWFMDD200) and Extension Cable (PWYREW000)

Unit Nomenclature

The unit nomenclature system (e.g., ARNU 07 3 TN C 4) provides a standardized way to identify LG VRF units. Each segment represents specific product attributes:

• Family: ARN (Multi V Indoor Unit, R410A)
• Type: U (DC Inverter Heat Pump)
• Indoor Unit Nominal Capacity: e.g., 07 (7,000 Btu/h), 30 (30,000 Btu/h)
• Model: Indicates unit type and features (e.g., SF for Wall Mounted/Art Cool™ Gallery, TT for 1-Way Ceiling Cassette, M1 for Ducted Mid Static).
• Feature: e.g., A (Standard), U (Uncased), G (Low Static).
• Generation: e.g., 2 (Second), 4 (Fourth).