This course introduces special tools and instruments used in the refrigeration and air conditioning field and their use in performing basic operations. This involves the handling of copper tubing and pipe, fittings, gauges and manifold. Adjusting of refrigerant controls, temperature controls and charging of systems are also covered. This course covers the diagnosis of abnormal pressures, use of torches, soldering techniques and electrical wiring of refrigeration systems. Included are jobs on pumpdown cycles, TEVs, special solders and relays.
Students learn to evacuate systems for cleaning and charging.
Wiring of a heat-cool system is also one of many wiring jobs. This course includes the study of the mechanisms and applications found in commercial and industrial refrigeration, such as defrost systems, ice makers, unloaders, winter controls and computerized pressure controls. Designs of evaporators, condensers, cooling towers, closed circuit evaporative water coolers, and supermarket systems are studied. Cycles in refrigeration are analyzed and plotted on the pressure enthalpy diagram. The usage method of calculating heat loads is covered.