Commercial Refrigeration

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Commercial Refrigeration

Unit: 1 Safety Content Standard(s) and Depth of Knowledge Level(s): Students will:

1. Demonstrate safety rules, regulations, and procedures for commercial heating, ventilation, air-conditioning, and refrigeration (HVACR). Learning Objective(s) and Depth of Knowledge Level(s): Students will:

1. Explain the role that safety plays on the job-site.

2. Explain the appropriate safety precautions to take around common job-site hazards. 3. Demonstrate the use and care of appropriate personal protective equipment (PPE).

4. Properly don and remove personal protective equipment (safety goggles, hearing protection, hard hat, and personal fall protection).

5. Explain the importance of Hazard Communications (HazCom) and material safety data sheets (MSDSs). 6. Describe fire prevention and firefighting techniques.

7. Define safe work procedures to use around electrical hazards. 8. Demonstrate correct selection and use of electrical and hand tools.

Essential Question(s):

How do job-site rules and regulations (OSHA) apply to job-site safety?

Content Knowledge Suggested Instructional Activities

Rigor & Relevance Framework (Quadrant)

Suggested Materials, Equipment and Technology Resources

Walking – working surfaces Exit routes

Fire prevention plans Emergency action plans Hazardous materials

Personal protective equipment General environmental controls Fire protection

Materials handling and storage OSHA rules and regulations

Laboratory demonstrations and experiments Guided practice

Group investigation Listen, think, pair, share Demonstrations

Discussion

Individual and group practice Problem solving exercises Math application exercises Math application worksheets

Laboratory shop equipment Student work sheets

Tools and supplies adequate for class PowerPoint presentations

Handouts

Textbooks, online and print Online resources

Online technical reference Computers, laptop and desktop LCD projector

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SkillsUSA Professional Development

Unit

Assessment:

Evaluation of student practices in the classroom and in the laboratory Written and performance assessments

Unit/Course CTSO Activity:

1. Continue SkillsUSA Leadership Development Programs. 2. Establish documentation for students’ career portfolio.

3. Students review SkillsUSA Technical Standards and Contest Projects.

Unit/Course Culminating Product:

Successful completion of industry-based written and performance testing Student portfolio submission

Course/Program Credential(s): Credential Certificate Postsecondary Degree University Degree

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Commercial Refrigeration

Unit: 2 Troubleshooting Content Standard(s) and Depth of Knowledge Level(s): Students will:

2. Determine the condition of electrical defrost systems utilized in commercial refrigeration.

Learning Objective(s) and Depth of Knowledge Level(s): Students will:

1. Demonstrate proper use of test equipment. 2. Inspect physical conditions of defrost system. 3. Explain the defrost operation.

What role does the defrost system play in system performance?

Commercial refrigeration codes Use of test equipment

OSHA safety regulations

Discussion

Handouts

Video/DVD presentations SkillsUSA Technical Standards SkillsUSA Contest Projects

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Assessment: Written and performance assessments

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Commercial Refrigeration

Unit: 3-4 Service Content Standard(s) and Depth of Knowledge Level(s): Students will:

3. Apply correct procedures for evacuation and charge of a commercial refrigeration system. 4. Demonstrate how to adjust high and low pressure controls of a commercial system.

1. Connect gauges to system.

2. Read and interpret a pressure temperature chart. 3. Explain how to connect vacuum pump to a system.

What skills, education, and certifications are required to service refrigeration systems?

Suggested Materials, Equipment and Technology Resources Equipment evaluation Measuring devices Refrigerant handling Service skills

Discussion

Handouts

Video/DVD presentations SkillsUSA Technical Standards SkillsUSA Contest Projects

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Assessment: Written and performance assessments

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Commercial Refrigeration

Unit: 5-9 Commercial Refrigeration

Content Standard(s) and Depth of Knowledge Level(s): Students will:

5. Determine different types of condensers and evaporators used in commercial refrigeration systems. 6. Identify different types of metering devices used in commercial refrigeration systems.

7. Demonstrate the operation of service valves used in commercial refrigeration systems. Examples: front-seat, mid-position, back-seat, ball-check

8. Apply skills necessary to pump down a commercial refrigeration system. 9. Determine oil pressure in a commercial refrigeration system.

1. Identify the different types of condensers and evaporators required in a refrigeration system. 2. Demonstrate proper working knowledge of metering devices.

3. Demonstrate the operation of commercial service valves.

4. Explain where refrigerant is stored during the pump down process. 5. Explain how proper oil flow affects system operation

How does commercial refrigeration differ from residential cooling systems?

Compression theory Test equipment

Commercial refrigeration applications Metering devices

Service valves

Discussion

Handouts

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Unit

Assessment:

Evaluation of student practices in the classroom and in the laboratory Written and performance assessments