The power mains supply for an air conditioner is typically connected to the outdoor unit rather than the indoor unit for several practical and safety reasons:
High Power Requirements: Air conditioning units require a significant amount of power to operate effectively. The outdoor unit houses the compressor, which is the main component responsible for cooling the refrigerant and circulating it through the system. Compressors typically draw a large amount of electrical current to function, and it is more practical to have a high-power connection at the outdoor unit to handle this load.
Distance and Efficiency: The indoor unit and the outdoor unit of an air conditioner are connected by refrigerant lines and electrical cables. By locating the main power connection at the outdoor unit, the need for running high-power cables over long distances is minimized. This setup ensures efficiency in power transmission and reduces the potential for energy loss over long cable runs.
Safety Concerns: The outdoor unit is generally placed outside the building or in a well-ventilated area. By having the power mains supply connected to the outdoor unit, there is a reduced risk of electrical hazards within the indoor living spaces. It also keeps the electrical components away from moisture and potential water leaks, further enhancing safety.
Easy Installation: Installation becomes more straightforward when the power supply is connected to the outdoor unit. The indoor unit can then be connected to the outdoor unit using lower-voltage control wiring, which is easier to handle and poses less risk during installation.
Serviceability: If there is a need for maintenance or repairs, it is more convenient and safer for technicians to work with electrical components in the outdoor unit, especially if it requires shutting off the power supply during service.
Overall, connecting the power mains supply to the outdoor unit of an air conditioner is a more practical and safer approach, ensuring efficient operation, easy installation, and simplified maintenance procedures.