​This course covers basic of vapor compression refrigeration cycle theory of action. The refrigeration system main components and its functions will be covered. Types of refrigerants used in air conditioning and refrigeration systems will be included. Air conditioning process and its Psychrometric will be covered. Most of air conditioning & Refrigeration systems components, operation such as domestic refrigerators, window A/C, split A/C, central package, automobile A/C will be covered.  Practically, the servicing process such as charging and evacuation, recovery processes of air conditioning and refrigeration systems will be studied. Maintenance and best operation of residential A/C and refrigeration systems will be covered.