Engineering Manual
Table Of Contents
- Convergence of Technology, Innovation, Flexibility, & Style
- Unit Nomenclature
- Outdoor Unit Overview
- Indoor Unit Overview
- Controls and Options Overview
- Art Cool Mirror Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- Acoustic Data
- Air Velocity and Temperature Distribution
- Refrigerant Flow Diagram
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Art Cool Gallery Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- Acoustic Data
- Air Velocity and Temperature Distribution
- Refrigerant Flow Diagram
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Standard Wall-Mounted Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- Acoustic Data
- Air Velocity and Temperature Distribution
- Refrigerant Flow Diagram
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Duct (Low Static) Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- External Static Pressure
- Acoustic Data
- Refrigerant Flow Diagrams
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Duct (High Static) Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- External Static Pressure / Acoustic Data
- Refrigerant Flow Diagrams
- Wiring Diagrams
- Factory Supplied Parts and Materials / Installation
- Installation and Best Layout Practices
- Four-Way Ceiling Cassette Indoor Units
- General Data / Specifications
- Dimensions
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- Acoustic Data
- Air Velocity and Temperature Distribution
- Refrigerant Flow Diagram
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Vertical-Horizontal Indoor Units
- General Data / Specifications
- Dimensions
- Cooling Capacity Table
- Heating Capacity Table
- External Static Pressure
- Acoustic Data
- Refrigerant Flow Diagram
- Wiring Diagram
- Factory Supplied Parts and Materials
- Installation and Best Layout Practices
- Equipment Selection Procedure
- Building Ventilation Design Guide
- Placement Considerations
- Refrigerant Piping Design
- Design Guideline Summary
- Creating a Balanced System / Manual Layout Procedure
- LG Engineered Multi F MAX Y-Branch Kit
- Refrigerant Charge
- Installation & Layout Best Practices
- Refrigerant Piping System Layout
- Piping Insulation
- Condensate Drain Piping
- Y-Branch Kit
- Wiring Connections
- Power Wiring (208-230V) and Communications Cable Details
- Indoor Unit Group Control
- Acronyms
General Specifications
• Wired remote controllers can be connected to all indoor unit types.
• Wireless handheld controllers can be used in conjunction with
wired remote controllers.
• A dry contact unit can be connected with a central controller
simultaneously.
- The master indoor unit is recognized by the dry contact unit and
the central controller.
- Group Control only available for indoor units manufactured after
February 2009.
- The central controller can control indoor units after setting the
address of the master indoor unit only.
- Slave indoor unit cannot be individually controlled by central
controller.
- Slave indoor unit will operate like master indoor unit.
• If an error occurs with the indoor unit, the error will be displayed on
the wired remote controller.
• The following functions are available with group control:
• Selection of operation options (operation/mode/set temperature)
• Control of air flow rate (High/Medium/Low)
Communication Cables Between Multiple Indoor Units Operating as a Group
(Group Control)
1. If any indoor units were specified to operate in unison, use
one (or multiple) three-core Group Control Kit (sold separately)
containing extension and Y-splitter cables. One (1) group control
cable kit for each indoor unit in the group except for the last
indoor unit.
2. Always use an LG provided group control communications cable
(Group Control Kit; sold separately) between the indoor unit and
the wall-mounted zone controller.
3. NEVER splice, cut, or extend cable length with field provided
cable.
4. A maximum of 16 indoor units can be connected to a wired
remote controller (maximum wire length: 164 feet). Before
running cable, decide which indoor unit will be the “Master;” set
the remaining as “Slave.” The zone controller will be connected
to the “Master.”
5. Identify each indoor unit operating as a group as “Master” or
“Slave”. Adjust the pertinent DIP switch at each indoor unit. On
wall mounted indoor unit models, set the assignment using the
handheld remote controller.
6. Use a daisy chain configuration and connect all of the group’s
indoor units together starting at the “Master” unit.
CN-REMO
On All Indoor Unit Styles
CN-REMO
On All Indoor Unit Styles
CN-REMO
On All Indoor Unit Styles
LG
Supplied
LG Supplied Group Control Kit (PZCWRCG3)
Cable connected to Zone Controller is the factory default connection.
Figure 312:Indoor Unit Group to Zone Controller Connections.
Accessory Model Number Image
Wired Remote Group Control
Cable Assembly - Required
for connecting multiple indoor
units to a control group
PZCWRCG3
Wired Remote/Wired Remote
Extension Cable - Required
for extending the distance
between indoor units or
remote controllers in a control
group
PZCWRC1
Table 134:Accessories Required for Group Control.
Indoor Unit Group Control
WIRING CONNECTIONS
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
222 | WIRING CONNECTIONS
Multi F and Multi F MAX Indoor Unit Engineering Manual
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