AVTEC

Refrigeration



Refrigeration StudentRefrigeration technicians install, maintain, and repair Freon and Ammonia air conditioning and refrigeration systems and troubleshoot and repair their electrical controls.  Their knowledge and skills are in demand throughout Alaska in homes, office buildings, restaurants, public buildings, seafood processing and manufacturing plants and shipping industries.

The Refrigeration program offers a blend of classroom instruction, lab, and live work practice to ensure students learn the necessary skills to become good Refrigeration Technicians. The program is fast-paced and challenging. Students should have good mechanical aptitude, strong mathematics and reading skills, and the ability to manage time productively. Students train on a variety of domestic and commercial refrigeration systems.  Students practice installing, troubleshooting  and repairing refrigeration, heat pump, and air conditioning systems, compressors, evaporators, condensers, control devices, control valves, electrical controls and motors, and electrical wiring.

Typically 50% of the training is hands-on and 50% is classroom instruction. Training may include outdoor activities, so students need appropriate work clothing.

Mission

To provide training through classroom instruction, demonstration, and practical application, methods for installation, maintenance, service, repair and diagnostics of refrigeration and heat pump systems.

Length of Course

609 clock hours, 87 training days

Enrollment

Early January, Late August

Training Hours

8:30 a.m. to 4:30 p.m., Monday through Friday

Refrigeration Prerequisites

Strong reading and mathematics skills are essential to achieve top graduation levels and the best paying jobs. For specific program entry guidelines and testing requirements in reading and mathematics, contact the Admissions Office at (800) 478-5389.

TABE tests scores for this program must be:

Reading - 555
Combined Math - 552

Physical requirements of the occupation are the ability to lift and carry 50 lbs., and stoop, kneel, crawl, and walk continuously. It also requires being able to work from a ladder at heights up to 30 ft. The occupation may also require working outdoors in a variety of weather and climate conditions where physical hazards may exist.

Students who wear prescription glasses are recommended to have prescription safety glasses.

Occupational Levels

Occupational levels of Refrigeration Technician, Refrigeration Repairer and Refrigeration Assistant Repairer will be assigned upon successful completion of the training program.

Occupational levels are assigned based on the student’s proficiency of the program’s competencies.

Industry Certifications

During the program, students receive training and testing for the following industry certifications: 10-hour OSHA Construction Safety Certification, EPA 608 Refrigeration Technician, and Industrial First Aid and CPR.

Program Content

To achieve a Refrigeration certificate, students must complete the following requirements.

Refrigeration Program Hours
Theory of Heat 35
Safety Tools and Equipment and Shop Practices 126
Electricity 161
Commercial and Marine Refrigeration 126
Domestic Appliances 35
Heat Pumps 35
Industrial Refrigeration and Chilled Water Systems 42
Related Studies 49
   

Total

609


Program Content Detail


Related Studies

Participate in school safety orientation, complete achievement tests, obtain First Aid & CPR card, complete basic applied mathematics, participate in resume writing and job search training, and participate in interview and communications training. Complete OSHA 10 hour certification.

Note: First Aid & CPR, job search and job interview training will be optional and offered in evenings or on weekends.

Theory of Heat

Compare standard statements of refrigeration theory. Demonstrate a working knowledge of matter and energy. Describe properties of refrigeration and refrigerants.  Demonstrate an understanding of basic thermodynamic theory and perform heat transfer calculations.

Safety, Tools, and Equipment and Shop Practices

Recognize and practice good general safety practices. Properly utilize common tools and equipment. Identify and properly use common hand and power tools. Use propane and oxyacetylene torches. Install refrigeration piping and accessories.  Identify fasteners and fastening procedures.  Work with tubing and piping. Practice leak detection, system evacuation, and system cleanup. Discuss refrigeration and oil chemistry, and management procedures. Properly recover and charge systems. Calibrate common instruments.

Electricity

Demonstrate an understanding of basic electrical theory and proper use of test instruments; build and test motor control circuits; perform electrical tests; analyze basic series, parallel and combination resistive AC and DC circuits; sketch wiring diagram symbols and circuits; Use wiring diagram software to design and print out professional looking diagrams. Maintain and replace solenoids, pressure switches, thermostats and relays; identify, select, install and maintain common electrical control devices; demonstrate circuit construction workmanship, techniques and practices; identify, install, troubleshoot, repair and maintain common motors; state the different characteristics of electric motors; apply different types of motors to their proper uses; describe automatic controls; apply and test automatic control components; describe, adjust and install advanced automatic controls. 

Commercial and Marine Ammonia Refrigeration

Troubleshoot and repair commercial and marine refrigeration systems including energy efficient ammonia refrigeration systems. Maintain and repair commercial and marine refrigeration components including evaporators, condensers, compressors, expansion devices, and special refrigeration system components. Compare different system refrigerants. Operate and maintain commercial and marine refrigeration machines including ice machines, chillers, freezers, special refrigeration applications, and ammonia systems. 

Domestic Appliances

Diagnose and repair domestic refrigerators and freezers. Install and repair room air conditioners.

Heat Pumps

Discuss Reverse-Cycle Refrigeration. Locate and identify heat pump components. Calculate balance points and co-efficient of performance. Compare heat pump systems and heat sources. Evaluate heat pump controls. Distinguish between different heat pump system types. Describe Heat pumps and heat pump systems. Understand ground-source heat pump operation and installation.

Industrial Refrigeration and Chilled Water Systems

Compare different industrial refrigeration systems. Describe cooling towers and pumps. Relate operation, maintenance, and troubleshooting of chilled-water air-conditioning system. Discuss commercial packaged rooftop, variable refrigerant flow and variable air volume systems.

 

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