RAC 101: Refrigeration I

GENERAL INFORMATION:

Course Title: RAC 101 Refrigeration I

 

Campus: CTE Center

Initiator: Bertoldo Esteban Jr.

Date: April 21, 2021

Course Description:


    This course introduces the student to the principles and practices as applied to applications of refrigeration systems. Discussions include basic refrigeration systems, refrigeration cycle, mechanical components, refrigerants, hand tools, instruments, and equipment. It also consists of the fundamentals of electricity, analyzing electrical circuits, and testing electrical components. Practical exercises are dismantling/assembling mechanical parts, refrigerant recovery, system reprocess, and rewiring electrical circuits. Troubleshooting and repairs are concentrated mainly on refrigerators, freezers, drinking fountains, and water dispensers for mechanical and electrical defects. Safe handling and storage of refrigerants are emphasized. The good servicing practices of refrigeration units as mandated in the Montreal Protocol and the Kigali Amendments will be observed. The student will be able to perform preventive maintenance, troubleshoot, and repair household refrigerators, drinking fountains, and freezers assessed through practical projects.

   

 

COURSE HOURS/CREDITS:

 

 

 

Hours per Week

 

No.  of  Weeks

 

Total Hours

 

Semester Credits

Lecture

 

           5

x

16

x

 80

=

5

Laboratory

 

         15

x

16

x

240

=

5

Workshop

 

          

x

 

x

 

=

 

 

 

 

 

 

     

Total  Semester

 

Credits

 

 

            10

                     

 

PURPOSE OF COURSE:        

                                            [    ] Degree requirement

                                            [    ] Degree elective

                                            [ x ] Certificate

                                            [    ] Other

 

PREREQUISITES: None

 

PSLO’S OF OTHER PROGRAMS THIS COURSE MEETS:

  

PSLO#

                             Program

None

None

 

 

  1)  INSTITUTIONAL STUDENT LEARNING OUTCOMES (Check all that apply)

 

[    ]

1. Effective oral communication: capacity to deliver prepared, purposeful presentations designed to increase knowledge, to foster understanding, or to promote change in the listeners’ attitudes, values, beliefs, or behaviors.

 

[    ]

2. Effective written communication: development and expression of ideas in writing through work in many genres and styles, utilizing different writing technologies, and mixing texts, data, and images through iterative experiences across the curriculum.

[x]

3. Critical thinking: a habit of mind characterized by the comprehensive exploration of issues, ideas, artifacts, and events before accepting or formulating an opinion or conclusion.

[x]

4. Problem-solving: capacity to design, evaluate, and implement a strategy to answer an open-ended question or achieve a desired goal.

 

[    ]

5. Intercultural knowledge and competence: a set of cognitive, affective, and behavioral skills and characteristics that support effective and appropriate interaction in a variety of cultural contexts.

 

[    ]

6. Information literacy: the ability to know when there is a need for information, to be able to identify, locate, evaluate, and effectively and responsibly use and share that information for the problem at hand.

[x]

7. Foundations and skills for life-long learning: purposeful learning activity, undertaken on an ongoing basis with the aim of improving knowledge, skills, and competence.

 

[    ]

8. Quantitative Reasoning: the ability to reason and solve quantitative problems from a wide array of authentic contexts and everyday life situations; comprehends and can create sophisticated arguments supported by quantitative evidence and can clearly communicate those arguments in a variety of formats.

 

2)  PROGRAM STUDENT LEARNING OUTCOMES (PSLOs): The student will be able

     to:

 

  1. Determine the safety and occupational health requirements in the refrigeration and air conditioning industry.
  2. Demonstrate proper use of refrigeration and air conditioning materials, tools, equipment, and instruments.
  1. Perform installation, preventive maintenance, and repair of refrigeration and air conditioning units.  
  1. Participate in the refrigeration and air conditioning trade.

                                          

3)  COURSE STUDENT LEARNING OUTCOMES (CSLOs) (General): The student will be

     able to:

 

  1. Discuss the fundamentals of refrigeration.
  2. Manipulate materials, tools, instruments, and equipment used in the refrigeration industry.
  3. Troubleshoot and repair domestic refrigeration systems.
  4. Observe safety precautions as guided by the Montreal Protocol and Kigali Amendment.

 

4)  COURSE STUDENT LEARNING OUTCOMES (CSLOs) (Specific): The student will be 

     able to:

CSLO (General) 1: Discuss fundamentals of refrigeration.

Student Learning Outcome (specific)

ISLO

PSLO

Assessment Strategies

1.1. Recognize the career opportunities and development of refrigeration

3,4,7

4

The student will be given a quiz using a rubric to determine their knowledge about job opportunities in the refrigeration industry.

 

1.2. Discuss heat, cold, temperature, and pressure

3,4,7

4

The student will be given a unit test using a rubric to determine their knowledge regarding heat, temperature, and pressure.

 

1.3. Explain the operation of basic refrigeration systems

3,4,7

4

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by explaining the refrigeration cycle.

 

1.4. Determine the mechanical parts of a compression system

3,4,7

4

The student will be given a quiz using a rubric to determine their knowledge about the mechanical parts of a compression system.

 

1.5 Explain the types of compressor and refrigerant controls commonly used in domestic units.

3,4,7

4

The student will be given a unit test using a rubric to determine their knowledge regarding types of compressors and refrigerant controls used in the domestic units.

 

1.6 Enumerate the types of refrigerants and their applications

3,4,7

4

The student will be given a unit test using a rubric to determine their knowledge about types of refrigerants and their applications.

 

1.7 Explain refrigerant recovery, recycling, and reclaiming

3,4,7

4

The student will be given a unit test using a rubric to determine their knowledge about refrigerant recovery, recycling, and reclaiming.

 

1.8 Discuss the fundamentals of electricity and electric motors

3,4,7

4

The student will be given a unit test using a rubric to determine their understanding of basic electricity and electric motors.

 

1.9 Understand and interpret electrical symbols, circuit, and controls

3,4,7

4

The student will be given a quiz using a rubric to determine their knowledge

about the schematic diagram of a manual defrost refrigerator.

 

CSLO (General) 2: Manipulate materials, tools, instruments, and equipment used in the refrigeration industry.

Student Learning Outcomes (specific)

ISLO

PSLO

Assessment Strategies

2.1. Determine the refrigeration tubing’s, fittings, supplies, and materials in the trade

3,4,7

2

The student will be given a quiz using a rubric to determine their knowledge

about the different tubing used in refrigeration and air conditioning.

 

2.2. Demonstrate the proper use of measuring tools

3,4,7

2

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by demonstrating the proper use of measuring tools.

 

2.3. Perform refrigeration tube cutting, reaming, flaring, bending, and swaging

3,4,7

2

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by performing tube processes.

 

2.4. Set up and perform gas and arc welding practices

3,4,7

2

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by setting up gas and arc welding equipment.

 

2.5. Silver-braze refrigerant pipes

3,4,7

2

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by brazing refrigerant lines.

 

2.6. Dismantle and assemble refrigeration system

3,4,7

2

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by dismantling and assembling a refrigeration system.

 

2.7. Set up refrigerant recovery machine

3,4,7

2

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by setting up a refrigerant recovery machine.

 

2.8. Set up refrigeration system evacuation.

3,4,7

2

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by vacuuming a refrigeration system.

 

2.9. Set up refrigerant charging.

3,4,7

2

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by recharging the refrigeration system.

 

2.10. Measure resistances, voltages, and current using digital and analog electrical measuring instruments.

3,4,7

2

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by measuring resistances, voltages, and current using digital and analog electrical measuring instruments.

 

CSLO (General) 3: Troubleshoot and repair domestic refrigeration system.

Student Learning Outcomes (specific)

ISLO

PSLO

Assessment Strategies

3.1. Identify the types of domestic refrigerators and freezers

3,4,7

3

The student will be given a quiz using a rubric to determine their knowledge

about the types of domestic refrigerators and freezers.

3.2. Familiarize the mechanical and electrical parts of a domestic refrigeration system

3,4,7

3

The student will be given a quiz using a rubric to determine their knowledge

about the mechanical and electrical parts of a domestic refrigeration system.

 

3.3. Determine the types of condensing units and evaporators used in a domestic system

3,4,7

3

The student will be given a quiz using a rubric to determine their knowledge about condensing units and evaporators used in domestic refrigeration systems.

 

3.4. Select proper tools and instruments for servicing refrigerators and freezers

3,4,7

3

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by selecting proper tools and instruments for servicing refrigerators and freezers.

 

3.5. List supplies and materials needed on a typical service call

3,4,7

3

The student will be given a quiz using a rubric to determine their knowledge

about the supplies and materials needed on a typical service call.

 

3.6. Recognize trouble signals

 

3,4,7

3

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by recognizing trouble signals.

 

 

3.7. Reprocess domestic refrigeration units

3,4,7

3

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by reprocessing domestic refrigeration units.

 

3.8. Retrofit refrigeration units

3,4,7

3

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by retrofitting refrigeration units.

 

3.9. Start a stuck-up compressor

3,4,7

3

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by starting a stuck-up compressor.

 

3.10. Check for restrictions in the system

3,4,7

3

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by checking for restrictions in the system.

 

3.11. Troubleshoot common refrigeration problems

3*,4,7

3

The student will be given a quiz using a rubric to determine their knowledge

about troubleshooting common refrigeration problems.

 

 

CSLO (General) 4: Observe safety precautions as guided by the Montreal Protocol and Kigali Amendment.

 

Student Learning Outcomes (specific)

ISLO

PSLO

Assessment Strategies

4.1 Demonstrate an understanding of the Montreal Protocol and Kigali Amendment

3,4,7

1

The student will be given a unit test using a rubric to determine their understanding of the Montreal Protocol and the Kigali Amendment.

 

4.2. Follow safety procedures in handling tools, instruments, and equipment.

 

3,4,7

1

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by safely measuring resistances, voltages, and current using digital and analog electrical measuring instruments.

 

4.3. Follow approved safety procedures and observe good practices in servicing refrigeration systems

3,4,7

1

Through a checklist/rubric, the student will be assessed using direct observation of procedural skills by following approved safety procedures and observing good practices in servicing refrigeration systems.

 

 

5) COURSE CONTENT:

  1. Fundamentals of refrigeration
  2. Materials, tools, instruments, and equipment used in the refrigeration industry
  3. Troubleshooting and repair of domestic refrigeration systems
  4. Safety precautions in the refrigeration industry

 

6)  METHOD(S) OF INSTRUCTION:

          [ x ]  Lecture                    [    ]  Cooperative learning groups

          [ x ]  Laboratory               [ x ]  In-class exercises

          [ x ]  Audio visual            [ x ]  Demonstrations

          [   ]  Other

 

 

7)  REQUIRED TEXT(S) AND COURSE MATERIALS:

  1. Silberstien, E., Obrzut, J., Tomczyk, J., Whitman, B., & Johnson, B. (2020). Refrigeration and Air Conditioning Technology. 9th Edition. 200 Pier 4 Boulevard, Boston, MA 02210, USA: Cengage (or most recent edition) 
  2. Russel A. Smith. Electricity for Refrigeration, Heating, and Air Conditioning. 8th Edition. 5 Maxwell Drive, Clifton Park, NY 12065 2919 USA. Delmar Cengage Learning (or most recent edition)

Course Materials:

  1. CAI classroom with whiteboard
  2. Laboratory workshop, equipment, and tools of the trade
  3. Refrigeration toolkit
  4. Text, Teacher’s Resource Guide, workbook
  5. Multi-media projector

 

8)  REFERENCE MATERIALS:

National Center for Construction Education and Research, Heating Ventilating and Air Conditioning. Upper Saddle River, New Jersey Columbus, Ohio, USA. Prentice-Hall, 2001 (or most recent edition).

 

Althouse, A., Turnquist, C., & Bracciano, A. (2004). Modern Refrigeration and Air Conditioning. 18th Edition. Tinley Park, IL: The Goodheart-Wilcox Co., Inc. (or most recent edition) 

Scaringe, R. P. Environmentally Safe Refrigerant Service Techniques for the Next Generation. Mainstream Engineering Corporation, Rockledge, Florida, USA. 12th Edition, 2004 (or most recent edition).

Air Conditioning Hand Out

 

9) INSTRUCTIONAL COSTS:

None

 

10) EVALUATION:

The student must achieve a grade of C to pass the course.

The summative assessment will be given during the mid-term and final term examinations.

 

11) CREDIT BY EXAMINATION:

None

RAC 101 Refrigerator I Endorsed by CC: 05/05/21
  Approved by VPIA: 05/06/21

 

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