BES702 - Air Conditioning

Outline info
Last revision date 2018-09-12 13:10:48.782
Last review date 2018-09-12 13:10:48.784

Subject Title
Air Conditioning

Subject Description
The Air Conditioning and Refrigeration subject is designed to prepare students to operate air-conditioning and refrigeration systems in buildings in a safe, energy efficient, economical and environmentally conscious manner.

Credit Status
One credit toward the Building Environmental Systems (BES) Operator Class II Certificate.

Learning Outcomes
Upon successful completion of this subject the student will be able to:

1. Perform simple calculations involving temperature, heat and changes of state and be able to define the terms involved.

2. Describe, using relevant diagrams, the basic refrigeration cycle.

3. Explain the purpose of compressors in refrigeration and describe the safe operation of the main different types of compressors.

4. Explain the purpose of heat exchangers in condensers and evaporators and describe the efficient operation of the main types of heat exchanger.

5. Describe the purpose of metering devices in refrigeration and identify the advantages and disadvantages of the different types in common use.

6. Interpret electrical control diagrams associated with air conditioning and refrigeration and describe the functioning and trouble-shooting of the main electrical components involved.

7. Use a psychrometric chart to perform simple calculations involving air conditions.

8. Prepare an effective preventive maintenance schedule along with relevant reading and trouble-shooting charts.

9. State and explain regulations and procedures involving the safe and environmentally friendly use of refrigerants and refrigeration equipment.

10. Describe how the vapour compression cycle can be reversed to deliver heating as well as cooling to a building.

11. Explain the principles of operation of the various types of chillers.

12. Describe alternative refrigeration systems.

Cheating and Plagiarism
Each student should be aware of the College's policy regarding Cheating and Plagiarism. Seneca's Academic Policy will be strictly enforced.

To support academic honesty at Seneca College, all work submitted by students may be reviewed for authenticity and originality, utilizing software tools and third party services. Please visit the Academic Honesty site on for further information regarding cheating and plagiarism policies and procedures.

All students and employees have the right to study and work in an environment that is free from discrimination and/or harassment. Language or activities that defeat this objective violate the College Policy on Discrimination/Harassment and shall not be tolerated. Information and assistance are available from the Student Conduct Office at

Accommodation for Students with Disabilities
The College will provide reasonable accommodation to students with disabilities in order to promote academic success. If you require accommodation, contact the Counselling and Disabilities Services Office at ext. 22900 to initiate the process for documenting, assessing and implementing your individual accommodation needs.

BES700 is recommended but not required

Topic Outline

Principles of Refrigeration

  • Refrigeration Cycle
  • Mechanical Components of the Refrigeration System
  • Psychrometry

  • Properties of Refrigerants
  • Environmental Impact of Refrigerants
  • Management of Refrigerants

The Compressor
  • The Function of the Compressor
  • Types of Compressors
  • Lubrication Systems

Condensers and Cooling Towers
  • The Function of the Condenser
  • Types and Specifications of Condensers
  • Operation of Cooling Towers

Evaporators and Cooling Coils
  • Operation of Evaporators
  • Types of Evaporators
  • Maintenance of Evaporators
  • Chillers and Cooling Coils

Metering Device
  • Purpose of the Metering Device
  • Types, Specification and Applications of Metering Devices

Heat Pumps
  • Principle of Operations
  • Ground Source Heat Pumps
  • Air Source Heat Pumps
  • Heat Pump Applications

Centrifugal Chiller Systems
  • Principles of Chillers
  • Controls
  • Economizers
  • Maintenance and Trouble-Shooting of Chillers

Absorption Chillers
  • Principles of Cooling by Absorption
  • Types of Absorption Chillers
  • Maintenance of Absorption Systems

Efficient Operation and Maintenance
  • Preventative Maintenance
  • Efficiency from Operation and Maintenance Practices
  • Trouble-Shooting

Electrical Controls
  • Electrical Devices in Refrigeration Systems
  • Other Electrical Components and their Functions

Alternative Refrigeration Systems
  • Free Cooling
  • Deep Lake Water Cooling
  • Thermal Storage

Mode of Instruction
Traditional Classroom
Lectures, discussions in the classroom, video 

Independent learning with tutor support.  Instructor will contact you by email.

Prescribed Texts
BES 702 - Air Conditioning and Refrigeration, Seneca College,ISBN/Sku #: 0-00011-714-B. Available from the Seneca Bookstore. 

Correspondence students, your text fee is included and your text will be shipped to you.

Reference Material

Required Supplies

Promotion Policy

Grading Policy
A+ 90%  to  100%
A 80%  to  89%
B+ 75%  to  79%
B 70%  to  74%
C+ 65%  to  69%
C 60%  to  64%
D+ 55%  to  59%
D 50%  to  54%
F 0%    to  49% (Not a Pass)
EXC Excellent
SAT Satisfactory
UNSAT Unsatisfactory

For further information, see a copy of the Academic Policy, available online ( or at Seneca's Registrar's Offices.

Modes of Evaluation
Marking standards reinforce professional practice by demanding legible, tidy work. Written projects should be well organized and grammatically correct, with proper spelling and punctuation. Late projects are penalized. Please obtain standards, dates and additional information from your instructor.

While attendance is not a formal part of the evaluation process, absenteeism will almost guarantee your inability to achieve a satisfactory grade, as there is no formal provision for make-up tests or projects you may miss.

For further information on evaluation and academic standing, see a copy of the Academic Policy. They are available at Seneca Registration offices.

All exams are written in person, either in class, or in a test centre in the case of online students.

Grading is based on the following marking scheme:

Projects 20%
Midterms 40%
Finals 40%

Correspondence and Online
Project 1              30%
Project 2              30%
Final                      40%

Approved by: Sharon Estok