NVCC COLLEGE-WIDE COURSE CONTENT SUMMARY
AIR 251 - AIR CONDITIONING SYSTEMS I (4 CR.)

 


COURSE DESCRIPTION

Prepares the student for advanced evaluation of Air Conditioning Systems. The course of study covers the skills and knowledge needed to apply technical data to the evaluation of residential and commercial air conditioning systems. Lecture 3 hours. Laboratory 3 hours. Total 6 hours per week.

GENERAL COURSE PURPOSE

Prepares the student to be able to evaluate and solve problems involving coil construction, capacities, selection, and repair. Also to evaluate and diagnose technical problems associated in the design, installation, and repair/replacement of residential and commercial air conditioning systems.

ENTRY LEVEL COMPETENCIES

Prerequisites: AIR 102 - Principles of Refrigeration II and AIR 134 - Circuits and Controls

COURSE OBJECTIVES

As a result of the learning experiences provided in the course, the student will be able to:

  1. use and describe refrigerant properties
  2. interpret and use in calculations the various properties values found in tables and charts
  3. calculate system and component capacities
  4. determine refrigeration effect
  5. determine refrigerant quantity (GPM)
  6. determine coil-compressor/coil relationship
  7. repair damage to coil
  8. evaluate residential and commercial refrigeration systems
  9. install or repair existing residential or commercial air conditioning systems
  10. evaluate capacity control systems and methods of capacity control
  11. apply tables charts and calculations to sizing system components
  12. apply data systems tables to installation procedures
  13. develop an in-depth knowledge of the various refrigerant flow control devices including multi-evaporator operation
  14. know the various components of a commercial air conditioning system
MAJOR TOPICS TO BE INCLUDED
  1. Refrigeration properties
  2. Refrigerant tables
  3. Absolute - Gauge - Partial pressures
  4. Specific volume - specific density of refrigerants
  5. Enthalpy of various refrigerants
  6. Weight of refrigerant to be circulated
  7. Calculating the refrigerant effect
  8. Calculating the coil compressor efficiency
  9. Determining the effects of superheat - subcooling
  10. Evaluating the system components
  11. Determining fluid flow through evaporators/condensers
  12. Determining pressure drop through evaporators
  13. Determining refrigerant pipe size and installation procedure


    14. Revised 1/96

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