A professional who installs and repairs industrial and commercial refrigerating systems according to blueprints and engineering specifications, using knowledge of refrigeration, structural layout, and function and design of components. Responsibilities include:

• Lays out reference points for installation of structural and functional components, using measuring instruments, such as tape, transit, plumb bob, levels, and square.
• Drills holes and installs mounting brackets and hangers into floor and walls of building.
• Lifts and aligns components into position, using hoist or block and tackle.
• Screws, bolts, rivets, welds, and brazes parts to assemble structural and functional components, such as motors, controls, switches, gauges, wiring harnesses, valves, pumps, compressors, condensers, cores, and pipes.
• Cuts, threads, and connects pipe to functional components and water or power system of premises.
• Pumps specified gas or fluid into system.
• Starts system, observes operation, reads gauges and instruments, and adjusts mechanisms, such as valves, controls, and pumps to control level of fluid, pressure, and temperature in system.
• Dismantles malfunctioning systems and tests components, using electrical, mechanical, and pneumatic testing equipment.
• Replaces or adjusts defective or worn parts to repair systems.
• May insulate shells and cabinets of systems.
• May install wiring to connect components to electric power source.
• May specialize in installing systems and be designated refrigeration-system installer.