GUIDELINES | 73
Application Guidelines
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APPLICATION 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 must be a minimum of 18 AWG, two-conductor, stranded, shielded, and must comply with the applicable local
and national codes. Ensure the communication cable is properly grounded at the master outdoor unit only. Do not ground the ODU-IDU
communication cable at any other point.
• 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.
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