A rack/power pack system is a type of refrigeration system commonly used in commercial and industrial settings for cooling large spaces or multiple smaller spaces. It typically consists of a series of evaporators, condensers, compressors, and controls, all arranged in a modular rack configuration.

The rack component of the system is responsible for generating and distributing refrigerant to the individual evaporator units. This allows for greater flexibility in the configuration of the cooling system, as individual evaporators can be added or removed as needed to suit the specific requirements of the space or product being cooled.

The power pack component of the system contains the compressor, condenser, and other key components that generate and regulate the flow of refrigerant. These components are typically housed in a compact, self-contained unit that is designed for easy installation and maintenance.

Overall, a rack/power pack system offers a highly efficient and flexible solution for large-scale cooling applications, such as in supermarkets, cold storage facilities, and food processing plants. However, proper design, installation, and maintenance are critical to ensure the system operates effectively and reliably. It's recommended to work with a qualified refrigeration contractor who has experience with these types of systems to ensure proper installation and ongoing maintenance.