The Hampden H-CRT-6 is a training equipment specifically designed to teach and demonstrate the principle and operation of high pressure commercial CO2 refrigeration cycle. The system helps students in understanding the principles of the refrigeration cycle by allowing them to gain hands-on experience. Students can measure pressure, vacuum, flow rate, and temperature using refrigerant grade CO2, R-744. This commercial refrigeration trainer can also be optionally supplied with integral fault package for troubleshooting experiments. This additional package comes with an locking box that has been configured with presets electrical faults. It allows the instructor to easily assess multiple students working on the same equipment. Optionally, the unit can also be equipped with carbon dioxide gas leak detector for safety purposes.