This standard specifies that a refrigeration cycle consists of a centrifugal compressor, compressor drive equipment (electric motor, turpin, engine, etc.), evaporator, condenser (water-cooled or air-cooled), attached refrigerant piping, control equipment, etc. This specifies recirculating refrigeration equipment that cools or heats water and has a refrigeration capacity of 348.8 kW {300 000 kcal/h} or more (hereinafter referred to as refrigeration equipment) as measured based on this standard.