Following an introduction to the principles of thermodynamics, the course teaches the heat transfer principles, the basic operations of refrigeration systems and plant layouts. The working principles of each unit comprising the refrigeration process are explained. Electrical systems associated with refrigeration, their components and basic troubleshooting are described. Students successfully completing this course can understand the principles of refrigeration systems including plant layouts and refrigerant classifications. This is the first course of three courses required to obtain a Holland College Certificate in Industrial Refrigeration. Successful completion of all three courses provides the student with an exemption from the work-experience requirement for the province's class B refrigeration exam.