LG Electronics 705371 User Manual

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Wiring

Due to our policy of continuous product innovation, some specifications may change without notification.

MULTI

MAX

MULTI

• All power wiring and communication cable installation must be performed by authorized service providers working in accordance with local,

state, and National Electrical Code regulations related to electrical equipment and wiring, and following the instructions in this manual.

• Be sure that main power to the unit is completely off before proceeding. Follow all safety and warning information outlined at the beginning

of this manual. Failure to do so may cause electric shock and bodily injury.

• Familiarize yourself with the location of the circuit breaker. Be sure that a circuit breaker or some other emergency power cutoff device is in

place before any power wiring is done to the system. Failure to do so may cause bodily injury or death.

•

Never touch any power lines or live cables before all power is cutoff to the system. To do so, may cause bodily injury or death.

• Undersized wiring may lead to unacceptable voltage at the unit and may become a fire hazard, causing bodily injury or death

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• Install appropriately sized breakers / fuses / overcurrent protection switches and wiring in accordance with local, state, and National Electri-

cal Code regulations related to electrical equipment and wiring, and following the instructions in this manual. Using an oversized breaker or

fuse may result in electric shock, physical injury or death.

•

Do not connect ground wire to refrigerant, gas, or water piping; to lightning rods; to telephone ground wiring; or to the building plumb-

ing system. Failure to properly provide a National Electrical Code-approved earth ground can result in electric shock, physical injury or death.

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• Multi F and Multi F MAX systems operate at 1Ø, 208-230V, 60Hz.

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ation ±10% or nameplate rated value.

• Properly ground the outdoor units per National Electrical Code and local codes.

• For power to the outdoor units, use field-supplied copper wiring that is solid or stranded, and shielded with the wires separately insulated.

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• Connect the wiring firmly so the wires cannot be easily pulled out.

• Refer to the inside of the chassis cover for circuit and terminal block diagrams for your model unit.

• Always match color codes of each wire and follow wiring diagram.

• Outdoor unit wiring can be found on the inside of the outdoor unit control cover.

• Consider ambient conditions (temperature, direct sunlight, inclement weather, etc.) when selecting, installing, and connecting the power wiring.

• Properly ground the outdoor units. Improperly ground wire can cause communication problems from electrical noise and motor current

leakage. *URXQGZLULQJPXVWDOZD\VEHLQVWDOOHGE\DTXDOL¿HGWHFKQLFLDQ

• If the system operates in reversed phase, it may damage the compressors and other components.

• If there is a possibility of reversed phase, phase loss, momentary blackout, or the power goes on and off while the system is

operating, install a field-supplied phase loss protection circuit.

• Undersized wiring may lead to unacceptable voltage at the unit and may cause unit malfunction.

• Install appropriately sized breakers / fuses / overcurrent protection switches and wiring in accordance with local, state, and National Electri-

cal Code regulations related to electrical equipment and wiring, and following the instructions in this manual. Using an oversized breaker or

fuse may 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 National Electrical Code-approved earth ground can result in property damage and equipment malfunction.

WIRING

General Information

Air

Conditioner

Main Power Source

Circuit Breaker

Use a circuit breaker

or time delay fuse

Figure 71: Circuit Breaker

It is highly recommended to provide a circuit breaker between the power source and

the outdoor unit as shown.

Outdoor Unit Model Power Source Fuse or Breaker Capacity

LMU18CHV, LMU24CHV 1Ø, 208-230V 20A

LMU30CHV, LMU36CHV 1Ø, 208-230V 25A

LMU480HV, LMU540HV 1Ø,208-230V 40A

LMU600HV 1Ø,208-230V 45A

Table 39: Circuit Breaker / Fuse Size.

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LG Electronics 705371 LG Dual Zone Mini Split Air Conditioner System with 48000 BTU Cooling Capacity, 2 Indoor Units, and Outdoor Unit

User Manual - Page 53