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ELECTRICAL SYSTEM INSTALLATION
Power Supply / Power Wiring Specifications
• Four-way ceiling-cassette systems operate at 1Ø, 208-230V, 60Hz.
• Power wiring / power wiring gauge to the outdoor unit(s) must be
solid or stranded, and must comply with all National Electrical Code
(NEC), UL, and local electrical codes.
• The indoor unit is powered by the outdoor unit.
• Power supply, wire types and sizes, and circuit breaker must be
selected based on NEC, UL, and local codes. Maximum allowable
voltage fluctuation ±10% or nameplate rated value.
• Properly ground the outdoor unit and indoor unit per NEC, UL, and local
codes.
• Ground wire must be longer than the common power / communication
wires.
• Connect the wiring firmly so the wires cannot be easily pulled out.
• Refer to the inside of the chassis cover or control cover for circuit and terminal block diagrams.
• Always match color codes of each wire and follow wiring diagram.
•
Do not install power wiring to the outdoor unit and the communication / connection (power) cable from the
outdoor unit to the indoor unit in the same conduit. Use separate conduits.
DANGER
WARNING
• All power wiring installation must be performed by trained service providers working in accordance with local, state, and NEC regulations
related to electrical equipment and wiring, and following the instructions in this manual. Failure to do so will lead to electric shock and bodily
injury or death.
• Use specified wiring for connections, and ensure that external force is not imparted to terminal connections. It will generate heat and / or
cause a fire, resulting in physical injury or death.
•
cause physical injury or death.
• Install appropriately sized breakers / fuses / overcurrent protection switches and wiring in accordance with local, state, and NEC regulation
related to electrical equipment and wiring, and following the instructions in this manual. Generated overcurrent will include some amount of
direct current. Using an oversized breaker or fuse will result in electric shock, physical injury or death.
• Use the appropriate type of overcurrent protection. Generated overcurrent will include some amount of direct current, and if the appropriate
type of overcurrent protection is not installed, there is a risk of fire, electric shock, and physical injury or death.
• Ground wiring is required to prevent accidental electrical shock during current leakage, communication problems from electrical noise, and
motor current leakage.
Do not connect the ground line to the pipes. There is risk of fire, electric shock, explosion, physical injury or
death.
• Per code, install a main indoor breaker, and an outdoor service disconnect that interrupts all power sources simultaneously. There is risk of
fire, electric shock, explosion, physical injury or death.
NOTE
• If there is a possibility of momentary blackout, or the power goes on and off while the system is operating, install a field-supplied phase loss
protection circuit. If not, the compressor and other components will be damaged.
•
• Install appropriately sized breakers / fuses / overcurrent protection switches and wiring in accordance with local, state, and NEC regulations
related to electrical equipment and wiring, and following the instructions in this manual. Generated overcurrent will include some amount of
direct current. Using an oversized breaker or fuse will result in equipment malfunction and property damage.
•
Do not connect ground wire to refrigerant, gas, or water piping; to lightning rods; to telephone ground wiring; or to the building plumbing
system. Failure to properly provide a NEC approved earth ground can result in property damage and equipment malfunction.
48
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.
Figure 60: Single Zone Outdoor Unit Power Wiring Diagram.
Power Wiring, Ground
to Outdoor Unit
Figure 61: Power Wiring
Conduit.
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