Wiring Guidelines - LG Multi V Art Cool ARNU093SFA4 Engineering Manual

APPLICATION GUIDELINES

Wiring Guidelines

General Power Wiring / Communications Cable Guidelines
• Follow manufacturer's circuit diagrams displayed on the inside of the control box cover.
• Have a separate power supply for the indoor units.
• Provide a circuit breaker switch between the power source and the indoor unit.
• Confirm power source specifications.
• Confirm that the electrical capacity is sufficient.
• Starting current must be maintained ±10 percent of the rated current marked on the name plate.
• Confirm wiring / cable thickness specifications:
• Power wiring is field supplied. Wire size is selected based on the larger MCA value, and must comply with the applicable local and
national codes.
• Communication cable between Master ODU to IDUs / HRUs to be 18 AWG, 2-conductor, twisted, stranded, shielded. Ensure the com-
munication cable shield is properly grounded to the Master ODU chassis only.
cable at any other point. Wiring must comply with all applicable local and national codes.
• 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.
• Terminal screws may loosen during transport. Properly tighten the terminal connections during installation or risk electric shock, physical
injury or death.
• Loose wiring may cause unit the wires to burnout or the terminal to overheat and catch fire. There is a risk of electric shock, physical injury
or death.
• Terminal screws may loosen during transport. Properly tighten the terminal connections during installation or risk equipment malfunction or
property damage.
• Loose wiring may cause unit malfunction, the wires to burnout or the terminal to overheat and catch fire. There is a risk of equipment mal-
function or property damage.
A voltage drop may 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.
120 | GUIDELINES
Due to our policy of continuous product innovation, some specifications may change without notification.
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LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Do not ground the ODU to IDUs / HRUs communication