Academic Catalog

APPR 186B: REFRIGERATION THEORY FOR SHEET METAL AIR CONDITIONING SERVICE

Foothill College Course Outline of Record

Foothill College Course Outline of Record
Heading Value
Units: 4.5
Hours: 30 lecture, 78 laboratory per quarter (108 total per quarter)
Prerequisite: Per California Code of Regulations, this course is limited to students admitted to the Sheet Metal-Air Conditioning Service Mechanic Program.
Degree & Credit Status: Degree-Applicable Credit Course
Foothill GE: Non-GE
Transferable: None
Grade Type: Letter Grade (Request for Pass/No Pass)
Repeatability: Not Repeatable

Student Learning Outcomes

  • A successful student will be able to charge a refrigerant system using three methods: weight, subcooling and superheat.
  • A successful student will be able to explain how the refrigeration cycle is reversed in a heat pump.

Description

Continuing refrigeration theory with emphasis on all the major parts of refrigeration systems. The explanation of the principles and function of the heat pump in a residential application.

Course Objectives

The student will be able to:
A. Explain the factors that limit the maximum and minimum size of the evaporator.
B. Demonstrate system charging methods.
C. Discuss the function of the two evaporator sections.
D. Explain and demonstrate the operation of the heat pump.

Course Content

A. Explain the factors that limit the maximum and minimum size of the evaporator
1. Explanation of how low ambients affect capillary tubes
2. Explanation of the capillary tube function
3. Definition of flash gas and explanation of its cause
B. Demonstrate system charging methods
1. Charge a system using a combination of three methods-weight, head pressure, and superheat
C. Discuss the function of the two evaporator sections
1. Identification of all the parts of an expansion valve
2. Operation of thermostatic expansion valves and reversing valves
3. Procedure for charging a thermostatic expansion system
D. Explain and demonstrate the operation of the heat pump
1. Explanation of how a refrigeration cycle can be reversed in a heat pump
2. Identification of the basic parts and accessory components of a heat pump

Lab Content

A. Disassembly and assembly of selected refrigeration system components
B. Demonstrate understanding of function and possible repairs and adjustments

Special Facilities and/or Equipment

Laboratory equipped with air conditioning equipment.

Method(s) of Evaluation

A. Results of written quizzes and tests, and comprehensive written final examination
B. Shop participation
C. Assignments that may include outside readings, reports and worksheets
D. Maintenance of a workbook of student's daily work activities

Method(s) of Instruction

A. Lecture
B. Discussion
C. Laboratory
D. Demonstration

Representative Text(s) and Other Materials

Whitman, B., B. Johnson, J. Tomczyk, and E. Silberstein. Refrigeration and Air Conditioning Technology. Delmar, Cengage Learning, 2009.

International Training Institute for the Sheet Metal and Air Conditioning Industry. Service Work Lab Manual. IDI Multimedia, 2008.



NOTE: These are the standard Sheet Metal textbooks/workbooks used for this course. Although they may not be within 5 years of the required published date, they are the most current books used when teaching this course.

 

Types and/or Examples of Required Reading, Writing, and Outside of Class Assignments

A. An example of a reading assignment is to read Unit 24, Expansion Devices‚ in the Refrigeration and Air Conditioning Technology text.

B. An example of a written assignment is to write answers to the review questions at the end of Unit 43, Air Source Heat Pumps‚ in the Refrigeration and Air Conditioning Technology text.

 

Discipline(s)

Air Conditioning, Refrigeration, Heating