LSU243HLV3 User Manual

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24 | PRODUCT DATA

Single Zone Extended Piping Wall Mounted Engineering Manual

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ELECTRICAL CONNECTIONS

• Terminal screws will become loose during transport. Properly tighten the terminal connections during installation or risk electric shock, physi-

cal injury, or death.

• Loose wiring will cause unit to malfunction, overheat, and catch fire, resulting in severe injury or death.

• Terminal screws will loosen during transport. Properly tighten the terminal connections during installation or risk equipment malfunction or

property damage.

• Loose wiring will cause unit malfunction, the wires to burnout or the terminal to overheat and catch fire. There is a risk of equipment malfunc-

tion or property damage.

A voltage drop will cause the following problems:

• Magnetic switch vibration, fuse breaks, or disturbance to the normal function of an overload protection device.

• Compressor will not receive the proper starting current.

WARNING

General Power Wiring / Communications Cable Guidelines

• Follow manufacturer’s circuit diagrams displayed on the inside of the control box cover.

• Confirm power source specifications.

• Properly ground the outdoor unit and the indoor unit per National Electrical Code (NEC) and local codes.

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

• Confirm that the electrical capacity is sufficient.

• Power supply to the outdoor unit must be selected based on NEC and local codes. Maximum allowable voltage fluctuation ±10% or name-

plate rated value.

• It is recommended that a circuit breaker is installed, especially if conditions could become wet or moist.

• Include a disconnect in the power wiring system. Add an air gap contact separation of at least 1/8 inch in each active (phase) conductor.

• Any openings where the field wiring enters the cabinet must be completely sealed.

Power Supply / Power Wiring

• LG Single Zone Extended Piping 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. See the next page for communication / connection (power) cable specifications from the

outdoor unit to the indoor unit.

• Ground wire must be longer than the common power / communication wires.

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

• 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 to the indoor unit in the same conduit.

Use separate conduits.

Figure 14: LS243HLV3 General Power / Communications System Sche-

matic.

Figure 15: LS303HLV3 and LS363HLV3 General Power / Communica-

tions System Schematic.

Indoor Unit

Outdoor Unit

Ground Wiring

Power Supply

Circuit Breaker