1. The indoor and outdoor units use independent sources of energy.
2. Draw power from separate branch circuits and install grounded switches / switches. Also be sure to ground the units. The external unit requires a 380V, 60Hz three-phase power source, while the indoor unit requires a 220V, 60Hz single-phase source.
3. Use a common power source and grounded manual switches / switches on all indoor units connected to the same outdoor unit. (Do not divide the power circuit of the indoor units connected to the same system into two or more circuits.)
4. Keep the refrigerant piping system and the control wiring system together (both between the outdoor and indoor units).
5. To avoid electrical interference, it is recommended to use a shielded cable with two wires for the control wiring. Do not use cables with multiple internal wires (three or more).
6. Refer to the table for details on wire size, circuit breakers, manual switches and ground wire. Regarding the electrical characteristics of the Intelligent Variable Refrigerant System, which is installed with a refrigerator, a motor capable of withstanding the characteristics of an overloaded refrigerator (high internal temperature, high compressed pressure, etc.) must be used, as it uses the input characteristics according to standard conditions (internal suction temperature of 27 ° C DB / 19 ° C and external of 35 ° C DB) as specification values.
Therefore, obey the specifications of each equipment, or the manufacturer's table to choose the size of the power cable. Regarding the length of the connection cable, select one so that the average low voltage is within the acceptable 2% at the time of departure, because different types of current than those of the general motor enter the connection cable.
