Principles of HVAC and Refrigeration Training

670-01 Air Conditioning Fundamentals

When you complete this lesson, you will understand the basic refrigeration cycle and how it applies to air conditioning.

  • Describe how heat is transferred from one fluid to another
  • List the common types of refrigerant used in air conditioning applications
  • Explain the purpose of the compressor, condenser, metering device, and evaporator
  • Describe the four steps of the basic refrigeration cycle

670-02 Ductless Air Conditioning

When you complete this lesson, you will understand the various types of ductless air conditioners and how the components function, including basic maintenance.

  • Describe the different types of ductless air conditioners
  • Explain the purpose of each major component in a ductless air conditioning system
  • Demonstrate an understanding of how each component's operation relates to the basic refrigeration cycle
  • Describe the basic preventive maintenance procedures performed on a ductless air conditioner
  • Explain the common problems that can occur with an air conditioning system and how they may be corrected

670-03 Introduction to Industrial and Commercial Refrigeration

When you complete this lesson, you will understand the purpose and function of industrial and commercial refrigeration, how heat transfer and the refrigeration cycle drive the process, and the types of components and refrigerants that may be used in units of this type.

  • Define the purpose of refrigeration
  • Identify the types of industries that use refrigeration
  • Describe the fundamentals of heat transfer
  • Describe the four steps of the basic refrigeration cycle
  • Explain the purpose of the compressor, condenser, metering device, and evaporator
  • Recall the purpose of using different refrigerants in different industrial and commercial operating conditions

670-05 Refrigerant System Troubleshooting

When you complete this lesson, you will understand how to systematically troubleshoot and diagnose refrigerant systems based on their universal application of the refrigeration cycle. You will also be familiar with industry standard diagnostic and testing tools for these systems.

  • Identify various types of tools and testing instruments necessary for refrigerant system troubleshooting
  • State three or more safety precautions to adhere to when troubleshooting refrigerant systems
  • Follow a logical, step-by-step approach to troubleshooting refrigerant systems
  • Describe the most common causes of refrigerant system malfunctions as discussed in this lesson
  • Identify indicators for airflow, refrigerant, compressor, mechanical, and electrical failures in the system

670-06 Chiller Design and Maintenance

When you complete this lesson, you will know the purpose of an industrial HVAC chiller and understand how its main components work together to remove heat from the system’s refrigerant, allowing the HVAC circuit to provide cool air to the facility.
You will also understand how heat exhausted from the chiller can be captured and reused as energy elsewhere at the facility, and you will be familiar with general maintenance recommendations which help keep the chiller operating at peak performance.

  • Explain the role of a chiller in an HVAC circuit
  • State specific conditions under which a water-cooled chiller would be better employed than an air-cooled chiller
  • Sketch the flow paths of chilled water, refrigerant, and cooling water through a water-cooled chiller’s main components; include the following:
    • Evaporator
    • Compressor
    • Condenser
    • Metering Device
    • Cooling tower
  • Give examples of two or more industry standard maintenance operations for industrial chillers and describe the purpose of each
  • Summarize the rationale of capturing heat exhausted by a chiller

670-09 Ducting and Air Movement for HVAC Systems

When you complete this lesson, you will understand the important role ducting plays in the HVAC system’s ability to provide maximum airflow. You will also be able to identify common HVAC airflow issues related to poorly implemented ducting.

  • State the three functions of an HVAC system and briefly discuss each
  • Describe the difference between HVAC ducting and HVAC equipment in relation to airflow
  • Discuss three reasons sheet metal ductwork provides superior airflow over flexible ducting; include the topics of installation, mold, and maintenance
  • Describe a hybrid duct system and state why flex ducting is often used at the end of the run
  • List industry standard ducting components and describe the role each plays in the ducting system
  • State the main differences between smoke dampers and fire dampers
  • Describe three commonly reported HVAC related issues which are caused by reduced airflow

670-15 District Energy Basics

When you complete this lesson, you will be able to define district energy and provide examples of the types of situations where district energy could be a solution. You will also be able to recall some advantages and disadvantages of the technology.

  • Define district energy
  • Identify examples in which district energy is a viable solution
  • Recall the advantages and disadvantages of district heating/cooling

670-17 Package Boiler Fundamentals

When you complete this lesson, you will be able to describe the purpose of the package boiler, the type and relationship of components within the system, and discuss the various situations in which a package boiler may be used, including its advantages and disadvantages.

  • Examine package boiler systems
  • List the components of a typical package boiler
  • Identify the functionality of the components of a package boiler
  • Describe the situations in which the use of a package boiler is appropriate
  • Recall the advantages and disadvantages of package boilers