This plan of instruction, study guides, and workbooks for a secondary-postsecondary-level course in refrigeration and air conditioning are one of a number of military-developed curriculum packages selected for adaptation to vocational instruction and curriculum development in a civilian setting. It is the third section of a three-part course (see Note for other sections) intended to train students in identification, location, function, installation, operational checking, servicing, repair, and maintenance of refrigeration and air conditioning systems. Dealing specifically with special refrigeration systems, water conditioning, absorption air conditioning (AC), AC controls, AC equipment, and evaporative cooling systems, this section contains four blocks covering 269.5 hours of instruction: Special Refrigeration System, Cooling Towers, Water Pumps, Water Conditioning, and Absorption AC System (5 lessons); AC Controls; (5 lessons); AC (7 lessons); and evaporative Cooling Systems (1 lesson). The plan of instruction contains an outline of the teaching steps, criterion objectives, lesson duration, correlation of tasks with a training standard, and support materials and guidance. Student materials include eight study guides with text information, objectives, review exercises, and references and eight workbooks with performance exercises. Commercial texts, military technical manuals, and audiovisual aids are suggested, but not provided. Materials may be adapted for individualized instruction or presented in a group setting. (YLB)