This includes generators, cooling tower systems with refrigeration compressors and condenser package heat pump units, exhaust fans, window air-conditioning units, split HVAC systems chillers, boilers (Naturals Gas, Propane, Fuel oil), Evaporative Coolers, Thermostatic controls, space and radiant heaters. Job Summary: Under the supervision of a Physical Plant Supervisor, the Refrigeration Mechanic installs, maintains, and repairs the heating, air-conditioning, and ventilation equipment for facilities under the care of the Arizona Army National Guard in the Central region, which include the areas of Phoenix, Buckeye, and Florence.