97 Copyright by Goodheart-Willcox Co., Inc. Aft er studying this chapter, you will be able to: • Identify the purposes of refrigerants. • List regulations involving the use and handling of refrigerants. • Identify current refrigerants and identify systems where they are used. • Compare advantages and disadvantages of various refrigerants. • Identify modern refrigerant oils and the refrigerants they are used with. • List the purposes of refrigeration desiccants. • Explain the purposes of refrigeration system fl ushing compounds. • Identify refrigeration system fl ushing compounds and explain why some are no longer used. • Explain the purposes of refrigeration leak detector dyes. American Society of Refrigerating and Air Conditioning Engineers (ASHRAE) azeotropic blend barrier hose biocide blended refrigerant carbon dioxide (CO2) CFC-12 chlorine (Cl) chlorofl uorocarbons (CFCs) Clean Air Act dichlorodifl uoromethane (CCl2F2) drop-in refrigerant fl ushing agent Freon HFC-134a hydrochlorofl uorocarbon (HCFC) hygroscopic mineral oil miscible Montreal Protocol one pound can polyol ester (POE) R-11 R-113 R-12 R-1234yf R-134a R-141b refrigerant oil retrofi tting Signifi cant New Alternatives Policy (SNAP program) tetrafl uoroethane (CF3CH2F) zeotropic blend Technical Terms Chapter 6 Refrigerants, Refrigerant Oils, and Related Chemicals