HART 1407 is the student’s introduction to the refrigeration cycle of air conditioning and refrigeration systems.  This course includes basic thermodynamics, heat transfer, temperature/pressure relationship, safe handling of refrigerants, refrigeration containment, and refrigeration components.

Soft-drawn copper is often used in refrigeration. Often two or more lengths of copper must be connected; students learn how to cut, swag (expand) and braze this type of copper. One end of each copper section is swaged so the next copper piece can fit inside it.
Instructor demonstrates how to swag copper.	Students measure copper...
...and cut pieces to braze	Students swag their copper...
then begin to braze it.

Once students have brazed numerous pieces together, they pressure test to check for leaks. If they find any leaks, they seal them and retest.