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
Wiring / Cable Connections
Power Wiring
Wired
Controller
Cable
Control Box Cover
Control Box
Cover Screws
Connecting the Power Wiring and
Communications Cable
1. To access the terminal block, open the control box cover.
2. Insert the power wiring / communications cable from the outdoor unit or branch
distribution unit (Multi F MAX systems only) through the sides of the indoor unit and
control box. Pass the wiring through the designated access holes to prevent dam-
age. To prevent electromagnetic interference and product malfunction, leave a space
between the power wiring and communications cable outside of the indoor unit.
3. Connect each wire to its appropriate terminal on the indoor unit control board. Verify
that the color and terminal numbers from the outdoor unit or branch distribution unit
(Multi F MAX systems only) wiring match the color and terminal numbers on the
indoor unit.
4. Neatly arrange power wiring / communications cable and secure with the appropriate
cable restraint. When clamping, do not apply force to the wiring connections.
5. Firmly reattach the control box cover, do not catch the wiring in the electric box
cover and make sure the cover firmly closes.
6. Fill in any gaps around the wiring access holes with sealant to prevent foreign
particles from entering the indoor unit.
Figure 207:Power Wiring and Communications
Cable Connection Access.
Figure 208:Simplied View of Indoor Unit to Outdoor Unit / Branch
Distribution Unit Terminal Connections.
Installation and Best Layout Practices
FOUR-WAY CEILING CASSETTE INDOOR UNITS
Ceiling cassette 4-way _ 19
Rubber Stopper
Cable
Conduit
Screws
Conduit Bracket
Using a Conduit
1. Remove the rubber stopper on the indoor unit. Pass the power wiring / communications cable
through the conduit, the conduit mounting plate, and to / through the control panel of the indoor unit.
2. Tighten the conduit and the conduit mounting plate together.
3. Connect the power wiring / communications cable to the indoor unit terminal block.
4. Screw the conduit mounting plate to the indoor unit.
Figure 209:Using a Conduit.
If the distance between the outdoor unit and indoor unit is greater than 131 feet, connect the power
wiring and communications cable separately (i.e., a conduit cannot be used).
Indoor Unit Terminal Block
GND
Outdoor Unit Terminal Block or
Branch Distribution Unit Terminal Block
(Multi F MAX Systems Only)
GND
GRN / YLW
BR
BL
RD
3 or S
3(C)2(L2)1(L1)
CEILING-CASSETTE | 149
Four-Way Ceiling-Cassette
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.
MULTI
F
MAX
MULTI
F