The main function of WL 312.12 is to provide compressed and subsequently condensed refrigerant for experiments with WL 312. Together with the WL 312.03 refrigerant evaporator, this results in a complete refrigeration circuit.
The condensing unit compresses the refrigerant and then condenses it in the condenser. The liquid refrigerant, under high pressure, flows via a refrigerant hose into the evaporator WL 312.03 (feed). From the evaporator, the low pressure gaseous refrigerant flows back into the condensing unit (return) via another refrigerant hose.
The pressures of the refrigerant are displayed on the high pressure side and the low pressure side. A rotameter indicates the refrigerant flow rate.