Facebook this Page (opens a new window)
Tweet this Page (opens a new window)

HVAC 211 - Refrigeration II

PREREQUISITES: HVAC 103 - Refrigeration I  and INDT 113 - Industrial Electrical I , or BCTI 130 - Introduction to Electrical .
PROGRAM: Heating, Ventilation, and Air Conditioning
CREDIT HOURS MIN: 3
LECTURE HOURS MIN: 2
LAB HOURS MIN: 2
DATE OF LAST REVISION: Fall 2023

Continues the study of air conditioning and refrigeration with further study of compressors, metering devices, system charging, refrigerant recovery, equipment installation and an introduction to troubleshooting procedures [electrical, mechanical and refrigeration]. Includes clean-up procedures following compressor burnout and analysis of how a single problem affects the rest of the system. Introduces electrical control systems and electrical motor basics as they apply to air conditioning and refrigeration including motor types, starting components, and motor troubleshooting basics. This course will use lecture, lab and online simulation to prepare students for the nationally recognized certification exam as part of the outcome assessment learning objectives.

MAJOR COURSE LEARNING OBJECTIVES: Upon successful completion of this course the student will be expected to:

  1. Identify and correctly locate on a system the air conditioning and refrigeration system components normally found in residential and light commercial A/C systems.
  2. Describe the proper operation and function of system components covered in the course.
  3. Identify the most common types of system component failure and the effect each has on the performance of the system.
  4. Using manifold gauges, pressure/temperature charts, and thermometers, determine the following for a refrigeration system: superheat, subcooling, evaporator coil TD, evaporator coil ΔT, condensing temperature, saturated suction temperature and condenser split.
  5. Apply the basic refrigeration cycle and a refrigerant temperature/pressure chart to analyze and troubleshoot A/C and/or refrigeration systems.
  6. Recover refrigerants; evacuate systems, leak check and field charge systems using the methods covered in the course.
  7. Outline the basics of electrical control of residential A/C systems.
  8. Identify the different single-phase motor types used in HVAC/R systems and their applications.
  9. Describe motor starting components, their application and how they work.
  10. Describe electrical troubleshooting techniques for compressor motors and fan motors and their associated starting components.
  11. Describe how changes in evaporator loading will affect the system.
  12. Describe the effect on the system from the common system problems such as undercharging, overcharging, dirty condensers, low evaporator airflow, etc.
  13. Safely perform assigned tasks following lab safety regulations.
  14. Attain readiness to take the ESCO HVAC Excellence Air Conditioning Service Exam

Terminology Definitions:

TD = EAT - BP where EAT is evaporator entering air temperature and BP is the refrigerant boiling point temperature in the evaporator.

Evaporator coil ΔT = EAT - LAT where EAT is evaporator entering air temperature and LAT is the evaporator leaving air temperature.

Saturated suction temperature = evaporator boiling point temperature.

Condenser split = condensing temperature - condenser entering air temperature.

CERTIFICATION STATEMENT:

Ivy Tech cannot guarantee that any student will pass a certification or licensing exam. Your success will be determined by several factors beyond the instruction you are given in the classroom including your test-taking skills, your willingness to study outside of class, and your satisfactory completion of appropriate practice exams. Certification and licensure exam questions are drawn from databases of hundreds of possible questions; therefore, a thorough understanding of the subject matter is required. Ivy Tech's coursework is designed to assist you in understanding the material sufficiently to provide a firm foundation for your studies as you prepare for the exam.

COURSE CONTENT: Topical areas of study include -  

  • System components
  • Troubleshooting of electrical and mechanical components
  • Troubleshooting and evaluating the refrigeration system
  • Common system problems and their causes
  • Equipment installation, evacuation, recovery and charging procedures
  • Motors and motor starting components
  • A/C electrical control systems
  • Lab practice

 
GRADING POLICY

A 90-100
B 80-89
C 70-79
D 60-69
F 0-59

Course Addendum - Syllabus (Click to expand)  


Print-Friendly Page (opens a new window)
Close Window