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Heating-Ventilation-Air Conditioning – Refrigeration (HVACR) Technician
Published
Hybrid Apprenticeship
Industries
O*Net Code
49-9021.00
Rapids Code
0637HY
Req. Hours
7550
State
DC
Created
Jul 16, 2021
Updated
Jul 16, 2021
Time-Based Skills
7 skill sets | 56 total skills
General trade orientation - 325 req. hrs
Use and care of tools
Test and measurement devices
Types and sizes of piping, tubing, and fittings
Introduction to refrigeration system components
Safety procedures and first aid
Equipment records and reports
Fabrication of system components - 525 req. hrs
Cut, thread, flare, bend, and shape piping and tubing
Install fittings
Solder, braze, and tin fittings and components
Care and use of oxy-acetylene and air-acetylene torches
Silver and soft soldering
System installation and connection - 1550 req. hrs
Electrical supply lines and cables
Electrical connections
Water service lines
Air supply lines
Steam lines
Steam return lines
Steam traps and strainers
Pressure reduction, expansion, evaporator, stop valves
Suction and discharge lines
Gauges
Dehydrators
Filters and strainers
Controls
Equipment installation - 900 req. hrs
Install condensers
Prepare compressor and motor bases
Install and align compressors and motors
Install evaporators and other cooling coils
Install and align centrifugal pumps and bases
Safe equipment moving - slings, lines, blocks and falls, chain hoists, rollers, dollies, and skids
System maintenance - 1100 req. hrs
Troubleshoot field systems
Test pressure, flow, etc.
Check liquid levels
Check repair leaks (refrigerants, liquids)
Purge, dehydrate, and charge systems
Repair, align, and adjust fans and blower sections
Align pulleys, bearing blocks, belt tension
Equipment repair - 2850 req. hrs
Disassemble and clean, repair, perform shop tests and run-in compressors
Repair, pressure test, dehydrate evaporators
Repair, acidize condensers, and roll condenser tubes
Remove, replace, disassemble, test, clean, calibrate, and renew defective parts on controls of all types including: pneumatic, electrical, electro-pneumatic, thermostatic, humidity, pressure, vacuum
Energy Efficiency - 300 req. hrs
Demand controlled ventilation
Dedicated outdoor air systems—conditioning outdoor makeup air separately from indoor return air.
Displacement ventilation—uses a low velocity stream of fresh, cold air at floor level to displace stale air near the ceiling
Electronically commutated motors—variable-speed HVACR Blower
Energy recovery ventilation (ERV)—captures energy from exhausted air and uses it to precondition incoming makeup air.
Zero-degree heat pumps
Duct sealing
Adaptive logic control—adapting to HVACR systems with a wide range of operating states.
Desiccant dehumidification—absorbs moisture with a liquid desiccant solution and then evaporates it using heat.
Micro channel heat exchangers
Micro environments—create a virtual zone for occupant environmental control.
Thermal energy storage—provides cooling capacity by extracting heat from storage material, such as ice or chilled water.
Chilled beam cooling—uses natural convection and radiative heat transfer.
Adjustable speed drives (ASD) reducing motor speed to accommodate varying HVACR loads.
Variable flow volume (VFV) systems—are ductless systems with multiple compressors to provide part-load performance and zoned temperature control.
