AHR 110 Introduction to Refrigeration

Lecture: 2 Lab: 6 Clinic: 0 Credits: 5

This course introduces the basic refrigeration process used in mechanical refrigeration and air conditioning systems. Topics include terminology, safety, and identification and function of components; refrigeration cycle; and tools and instrumentation used in mechanical refrigeration systems. Upon completion, students should be able to identify refrigeration systems and components, explain the refrigeration process, and use the tools and instrumentation of the trade.

Course is typically offered in Fall and Spring.
Student Learning Outcomes (SLOs)
At completion of the course, the student should be able to do the following:

Demonstrate safe practices in the HVAC shop following established safety procedures with a score of 90% or above.
Learn process of system charging by weight.
Learn proper usage of vacuum gauges in lab.
Learn system charging criteria based on metering device selection.
Learn process of Recovery, Recycle and Reclamation of refrigerant and refrigeration handling laws per EPA Section 608 guidelines in lab.
Complete Lockout/Tagout tags for equipment and electrical disconnects at 100% accuracy.
Recover refrigerant from lab equipment.
Charge system per selected equipment manufacturers specifications.
Demonstrate evacuation on lab unit using pump and micron gauges per ACCA standards.
Calculate Superheat and Subcooling on system to verify refrigerant level per selected equipment manufacturers specifications.
Convert temperature pressure scales from Fahrenheit to Celsius and absolute to gauge using a calculator at 80% or higher accuracy on a written test.
Calculate energy requirements with the use of a Volt/Ohm meter.
Demonstrate the correct usage of general hand tools in the HVAC lab.
Use HVAC/R specific refrigerant leak detectors, leak repair tools, propane and oxygen acetylene torches, and equipment regulators based on a guideline developed by the instructor.
Connect PVC, copper, black iron, piping in lab.
Pressure test piping connections.