Heating, Air Conditioning, and Refrigeration Mechanics and Installers ·  Install or repair heating, central air conditioning, or refrigeration systems, including oil burners, hot-air furnaces, and heating stoves.



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Occupational Tasks ·  Obtain and maintain required certifications.
· Comply with all applicable standards, policies, and procedures, including safety procedures and the maintenance of a clean work area.
· Repair or replace defective equipment, components, or wiring.
· Test electrical circuits and components for continuity, using electrical test equipment.
· Reassemble and test equipment following repairs.
· Inspect and test system to verify system compliance with plans and specifications and to detect and locate malfunctions.
· Discuss heating-cooling system malfunctions with users to isolate problems or to verify that malfunctions have been corrected.
· Record and report all faults, deficiencies, and other unusual occurrences, as well as the time and materials expended on work orders.
· Test pipe or tubing joints and connections for leaks, using pressure gauge or soap-and-water solution.
· Adjust system controls to setting recommended by manufacturer to balance system, using hand tools.
· Recommend, develop, and perform preventive and general maintenance procedures such as cleaning, power-washing and vacuuming equipment, oiling parts, and changing filters.
· Lay out and connect electrical wiring between controls and equipment according to wiring diagram, using electrician's hand tools.
· Install auxiliary components to heating-cooling equipment, such as expansion and discharge valves, air ducts, pipes, blowers, dampers, flues and stokers, following blueprints.
· Assist with other work in coordination with repair and maintenance teams.
· Install, connect, and adjust thermostats, humidistats and timers, using hand tools.
· Generate work orders that address deficiencies in need of correction.
· Join pipes or tubing to equipment and to fuel, water, or refrigerant source, to form complete circuit.
· Assemble, position and mount heating or cooling equipment, following blueprints.
· Study blueprints, design specifications, and manufacturers' recommendations to ascertain the configuration of heating or cooling equipment components and to ensure the proper installation of components.
· Cut and drill holes in floors, walls, and roof to install equipment, using power saws and drills.
· Wrap pipes in insulation, securing it in place with cement or wire bands.
· Measure, cut, thread, and bend pipe or tubing, using pipe fitter's tools.
· Fabricate, assemble and install duct work and chassis parts, using portable metal-working tools and welding equipment.
· Braze or solder parts to repair defective joints and leaks.
· Observe and test system operation, using gauges and instruments.
· Test lines, components, and connections for leaks.
· Dismantle malfunctioning systems and test components, using electrical, mechanical, and pneumatic testing equipment.
· Adjust or replace worn or defective mechanisms and parts, and reassemble repaired systems.
· Read blueprints to determine location, size, capacity, and type of components needed to build refrigeration system.
· Supervise and instruct assistants.
· Install wiring to connect components to an electric power source.
· Perform mechanical overhauls and refrigerant reclaiming.
· Cut, bend, thread, and connect pipe to functional components and water, power, or refrigeration system.
· Adjust valves according to specifications and charge system with proper type of refrigerant by pumping the specified gas or fluid into the system.
· Estimate, order, pick up, deliver, and install materials and supplies needed to maintain equipment in good working condition.
· Install expansion and control valves, using acetylene torches and wrenches.
· Mount compressor, condenser, and other components in specified locations on frames, using hand tools and acetylene welding equipment.
· Keep records of repairs and replacements made and causes of malfunctions.
· Lay out reference points for installation of structural and functional components, using measuring instruments.
· Schedule work with customers and initiate work orders, house requisitions and orders from stock.
· Fabricate and assemble structural and functional components of refrigeration system, using hand tools, power tools, and welding equipment.
· Lift and align components into position, using hoist or block and tackle.
· Drill holes and install mounting brackets and hangers into floor and walls of building.


Educational Requirements: ·  Long-term on-the-job training (> 12 months)


Occupational Skill Set
Skill Relevance
·  Troubleshooting 84%
·  Troubleshooting 84%
·  Repairing 83%
·  Reading Comprehension 83%
·  Installation 82%
·  Operation Monitoring 82%
·  Active Listening 80%
·  Repairing 80%
·  Active Listening 77%
·  Equipment Maintenance 76%