Refrigeration Fundamentals

1 Week Evening Classes (Monday - Thursday)

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Course Prerequisites: ACHP 105 or 1 year field experience. Student should be familiar with the AC cycle, basic electricity, AC and HP electrical wiring diagrams, refrigerant handling including recovery, pressure testing, leak detection, evacuation and proper charging by super heat and subcooling.

Course Objective: This course is designed to supplement a student's current knowledge of air conditioning and heat pumps so that he/she has a thorough understanding of commercial refrigeration systems, components and operations.

Topics covered in course:

• accumulators
• receivers
• crankcase pressure regulating valves
• discharge by-pass valves
• headmasters
• lube oil protection switches
• oil separators
• evaporator regulating valves
• pressure relief valves
• three way valves


• Defrost Methods / Controls / Wiring Diagrams / Sequence of operation
• air defrost / manual / DP / pump down
• hot gas defrost
• electrical defrost


• Design of a commercial walk-in cooler - sizing of major components walk-in cooler

Classes: Limited to 24 students with excellent instructor/student interaction. We encourage you to visit the school and discuss the courses in greater detail.