Type III: Low-Pressure Systems


Description:

The Type III classification certifies a technician for refrigerant service of low-pressure appliances. He can then also purchase refrigerants. This module is designed to help technicians understand the information necessary for obtaining Type III certification. Many of the questions for the Type III exam cover information that is covered in the "Core" module. But some of the information covered in this module is unique to Type III.

Learning Outcomes:

  1. Describe the guidelines for leak testing in low-pressure systems.
  2. Explain how different components in low-pressure systems work.
  3. Explain how cooling takes place in low-pressure systems.
  4. Describe the techniques for recovering refrigerants from low-pressure systems.
  5. Describe the requirements for recovering refrigerants from low-pressure systems.
  6. Describe the techniques for charging refrigerants in large low-pressure systems.
  7. Describe the refrigeration cycle in large low-pressure systems.
  8. Describe the safety precautions that technicians should follow when handling refrigerants in low-pressure systems.

Topic 1: Leak Detection

  • Topic Introduction and Objectives
  • Leak Testing Low-Pressure Systems
  • Overpressure in Low-Pressure Systems
  • Purge Units in Low-Pressure Systems
  • How Cooling Takes Place
  • Check-Point Question: Low-Pressure Systems
  • Check-Point Question: Low-Pressure Systems
  • Topic Summary

Topic 2: Recovering and Recharging Techniques

  • Topic Introduction and Objectives
  • Recovering Refrigerants from Chillers
  • Recovery Requirements
  • System Evacuations
  • Recovery and Recycling Equipment
  • Charging Liquid Refrigerants
  • Check-Point Question: Recovering and Recharging Techniques
  • Topic Summary

Topic 3: Refrigeration Cycle and Safety in Low-Pressure Systems

  • Topic Introduction and Objectives
  • Refrigeration Cycle for Low-Pressure Systems
  • Check-Point Question: Refrigeration Cycle and Safety in Low-Pressure Systems
  • Personal Safety
  • Check-Point Question: Refrigeration Cycle and Safety in Low-Pressure Systems
  • Topic Summary
  • Assessment