What type of control is classified as operating or primary in refrigeration systems?

In refrigeration systems, the primary or operating control is crucial because it directly regulates the system's operation to maintain the desired conditions. Operating controls function continuously during normal operation to ensure that the refrigeration cycle effectively meets the cooling demands.

These controls are responsible for activating and deactivating components like compressors and condensers. For instance, a common operating control is a thermostat, which monitors temperature within the refrigerated space and signals the compressor to turn on or off accordingly to maintain the set temperature.

In contrast, safety controls are designed to protect the system and its components from operating outside of safe parameters, while pressure and temperature controls may be used in conjunction with operating controls but do not directly govern the primary operation of the system. They may act as supplementary controls responding to specific conditions but do not serve the primary function of maintaining the operational integrity and baseline performance of the refrigeration system.