141 HVACR Refrigeration I (18 hours / 365 days to complete) Advanced Written by Chris Compton
HVACR Refrigeration 141 provides a thorough examination of the refrigeration cycle as it is applied to both air conditioning and refrigeration purposes, and presents a practical and systematic method to diagnose problems in the refrigeration cycle. If you understand the parameters governing the operation of the refrigeration cycle, you will be able to diagnose any piece of equipment. Prerequisite: It is recommended that you have a good understanding of HVACR Fundamentals, or have a working knowledge of them, prior to enrollment into this intermediate course. Instruction aligns with ACCA Quality Installation and ACCA/ ASHRAE Standard 180. This online refrigeration training course is recognized for 18 hours of continuing education (CEHs) applicable to NATE re-certification.
Modules cover:
- Basic Refrigeration Cycle Physics
- Condensation and Condensers
- Expansion and Metering Devices
- Evaporation and Evaporators
- Compression and Compressors
- Measure the Normal Cycle
142 HVACR Refrigeration II (18 hours / 365 days to complete) Advanced
Written by Chris Compton
This course is a continuation and elaboration of HVACR Refrigeration I. Presentations describe the application of common accessories found in a system, piping arrangements, sizing considerations and system operation. Instruction aligns with ACCA Quality Installation and ACCA/ ASHRAE Standard 180. Prerequisites: you will want to have completed 141 HVACR Refrigeration I, or have a working knowledge of the content of that course prior to enrollment into this advanced course. Please refer to the 141 course description in the Catalog for specific details. This online refrigeration training course is recognized for 18 hours of continuing education (CEHs) applicable to NATE re-certification.
Modules cover:
- Refrigerants
- Common Compressor Accessories
- Common High-Side Accessories
- Common Low-Side Accessories
- Piping System Sizing
- Common System Control Arrangements
246 Low GWP Refrigerants (3 hours / 365 days to complete)
The 246 Low GWP Refrigerants is an intermediate course, totaling 3 instructional hours.
Modules cover:
- Low GWP (Global Warming Potential) Refrigerants
“As the HVACR industry continues to move forward and innovate, the refrigerants that were once so commonplace are now being phased out. Replacing them are more energy efficient, environmentally friendlier refrigerants, known as Low GWP refrigerants. Many of these new refrigerants are classified by ASHRAE as A2L, or slightly flammable. The industry is also seeing expanded use of some hydrocarbon (A3) refrigerants, such as propane and isobutane. Students and technicians will require additional training for the safe handling and transportation of these refrigerants.” – ESCO
441 HVACR Commercial Refrigeration I (24 hours / 365 days to complete) Advanced
Written by Dick Wirz
We will compare things you’re already familiar with like space temperatures and common components of basic AC systems to those of commercial refrigeration systems. We will examine evaporators, condensers, compressors, metering devices, controls and accessories, and the refrigerants commonly used in commercial refrigeration. We will review the important terminology. At the end of this course we will cover some system troubleshooting, giving you a chance to put your knowledge to work on the 9 most common system problems. And you will understand when to apply TROT (The Rule Of Thumb) in the absence of a manufacturer’s recommendation. Recommended Prerequisites: you will need a strong working knowledge of HVACR Fundamentals prior to enrollment into this course. This online refrigeration training course is recognized for 24 hours of continuing education (CEHs) applicable to NATE re-certification. Required Text: Commercial Refrigeration for HVACR Technicians – by Dick Wirz.
Modules cover:
- Refrigeration Principles
- Evaporators
- Condensers
- Compressors
- Metering Devices
- Controls and Accessories
- Refrigeration System Troubleshooting Part 1
- Refrigeration System Troubleshooting Part 2
442 HVACR Commercial Refrigeration II (18 hours / 365 days to complete) Advanced
Written by Dick Wirz
This course is a continuation of 441 HVACR Commercial Refrigeration I. Again, we will compare things you’re already familiar with like basic AC systems to those of commercial refrigeration systems. We will examine compressor motor controls, retrofitting, recovery, evacuation, and charging; various supermarket refrigeration systems, walk-in refrigerators and freezers, and commercial ice machines so you can identify the components, their functions, and the refrigerants belonging with each application. After you have a good understanding of the equipment, we’ll explore appropriate temperatures for products kept in that equipment. And finally, you will understand when to apply TROT (The Rule Of Thumb) in the absence of a manufacturer’s recommendation. Recommended Prerequisites: you will need a strong working knowledge of HVACR Fundamentals prior to enrollment into this course. This online refrigeration training course is recognized for 18 hours of continuing education (CEHs) applicable to NATE re-certification. Required Text: Commercial Refrigeration for HVACR Technicians – by Dick Wirz.
Modules cover:
- Compressor Motor Controls
- Retrofitting, Recovery, Evacuation, and Charging
- Supermarket Refrigeration
- Walk-in Refrigerators and Freezers
- Ice Machines
- Product Temperatures for Preservation and Health – Refrigeration Business Tips
245 HVACR Compressor Failure Analysis w/ Bob Feathers
This is a 11 video / 5 hour series of Compressor tear downs performed by and commented on by Bob Feathers, also known as “Mr. Compressor”.He dissects a range of manufacturer’s reciprocating semi-hermetic commercialcompressors that have failed and points out the clues that point to the reason for failure.
