How is the label for the run terminal on a single phase compressor identified?

The label for the run terminal on a single-phase compressor is identified by the letter "R." In HVAC systems, the "R" terminal typically represents the run or power terminal for the compressor, which is responsible for supplying the necessary voltage for the compressor to operate efficiently. This identification is crucial for technicians when diagnosing issues or performing maintenance, as it helps ensure they connect components correctly and understand the electrical flow through the system.

Other labels in HVAC systems have specific designations: for instance, "C" usually refers to common, which is a return path for the electrical current. Similarly, "S" might represent a start terminal or switch, and "T" is less commonly used and does not typically represent the run terminal in this context. Understanding these labels helps HVAC technicians to work safely and effectively with electrical components in heating and cooling applications.