Nelson Higher Education

Higher Education

Commercial Refrigeration for Air Conditioning Technicians, 3rd Edition

  • Dick Wirz
  • ISBN-10: 130550643X
  • ISBN-13: 9781305506435
  • 432 Pages | Hardcover
  • Previous Editions: 2010, 2006
  • COPYRIGHT: 2018 Published
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About the Product

Now in its third edition, the ever-popular COMMERCIAL REFRIGERATION FOR AIR CONDITIONING TECHNICIANS helps HVAC professionals apply existing skills to new concepts in order to service medium and low-temperature refrigeration equipment such as walk-ins, reach-ins, refrigerated cases, and ice machines. Chapters emphasize refrigeration in the food service industry, offering practical tips from the author and other seasoned pros on installing, servicing, and troubleshooting commercial equipment. Freshly updated throughout, the third edition adds more than 150 new illustrations, pictures, and diagrams—including a step-by-step flowchart for quickly diagnosing and addressing the nine most common refrigeration problems on the job—as well as six new sections on the latest advancements in commercial refrigeration. A handy resource to keep in any truck or shop, COMMERCIAL REFRIGERATION FOR AIR CONDITIONING TECHNICIANS, 3rd Edition, is an indispensable tool for any technician working with commercial refrigeration today.


  • High Esteem: Recognized as the number one book on commercial refrigeration by instructors and field technicians, the third edition is a practical resource that makes problem-solving easy in both workplace and classroom settings.

  • Tech Friendly: Conversational and fun, chapters deliver refrigeration concepts in an easy-to-understand tone and alongside practical applications.

  • Helpful Troubleshooting: "Rules of Thumb" throughout the readings help technicians diagnose common service problems and prepare technicians for those times when factory recommendations and specifications are not readily available.

  • Cool Visuals. Abundant diagrams, photos, and illustrations help readers "see" concepts more clearly as they work through complex technical processes.

  • Coordinating Slides: FREE for instructors who adopt the 3rd Edition, Instructor Resources include animated PowerPoint® presentations that coordinate with each chapter to streamline course planning and enhance the student experience.

  • Testing: Designed for your convenience, Instructor Resources include chapter quizzes, mid-term exams, a final exam, and a flexible test bank for constructing your own tests, complete with answers.

  • Step-by-Step Diagnostics: Chapter 7 delivers a comprehensive approach for identifying refrigeration problems, including a flowchart which illustrates the key readings to take and logical sequence to follow when diagnosing nine of the most common issues.

About the Author

Dick Wirz

Dick Wirz is a Master Electrician and Master HVACR Mechanic in the states of Virginia and Maryland, as well as Washington, DC. A NATE-certified technician with more than four decades of professional experience, Dick owned and operated a successful commercial refrigeration company for 25 years and taught HVACR at a community college for another 15 years. Now semi-retired, Dick produces HVACR instructor aids in the form of animated slideshows under the name of Refrigeration Training Services at

Table of Contents

1. Refrigeration.
2. Evaporators.
3. Condensers.
4. Compressors.
5. Metering Devices.
6. Controls and Accessories.
7. Refrigeration System Troubleshooting.
8. Compressor Motor Controls.
9. Retrofitting, Recovery, Evacuation, and Charging.
10. Supermarket Refrigeration.
11. Walk-in Refrigerators and Freezers.
12. Ice Machines.
13. Product Temperatures for Preservation and Health.
14. Refrigeration Business Tips.
Appendix A: Summary of T.R.O.T.
Appendix B: Pressure Temperature (P/T) Chart.
Appendix C: Troubleshooting Charts.

New to this edition

  • New Sights: Expanded coverage now includes more than 150 extra pictures and diagrams, and six all-new sections of content, to boost the book’s already popular standing in the commercial refrigeration trade.
  • Service Scenarios: Offering firsthand perspectives from working technicians, these new "Service Scenarios" share a variety of problem-solving situations on commercial jobsites, as well as a realistic view of a HVAC careers.
  • Supermarket Advances: An entire new section includes in-depth discussions of the growing use of CO2 as a refrigerant in supermarket applications, helping readers gauge the rapidly changing world of commercial refrigeration today.
  • New Controls: Coverage of the latest electronic controls and controllers demonstrates their typical use in supermarket racks, along with creative applications for smaller commercial refrigeration units and residential air conditioning.
  • Oil Return: An entire new section on oil return for compressor parallel racks and related problems has been added to the book.
  • Industry Updates: Multiple enhancements throughout the book bring information up to date, making it more relevant to readers and the current industry trends.


All supplements have been updated in coordination with the Main title.
Please see Main title page for new to this edition information.

Instructor Supplements

Instructor's Companion Website  (ISBN-10: 1305506464 | ISBN-13: 9781305506466)

Everything you need for your course in one place! This collection of book-coordinated lecture and class tools is available online via the instructor resource center at You'll be able to access and download a number of helpful materials such as the instructor’s manual, PowerPoint® presentations, images, videos, and more.

Delmar Online Training Simulation: HVAC 4.0, 4 terms (24 months) Instant Access  (ISBN-10: 1305584406 | ISBN-13: 9781305584402)

DELMAR ONLINE TRAINING SIMULATION: HVAC is a 3-D, immersive simulation that offers a rich learning experience that mimics field performance. It challenges learners to master diagnostic and troubleshooting skills across six pieces of HVAC equipment found in industry: Gas Furnace, Oil Furnace, Gas Boiler, Small Commercial Air Conditioner, Central Air Conditioners, and Heat Pump. Soft skills are also included within the Simulation. To create successful learning outcomes, the Delmar Online Training Simulation: HVAC offers more than 150 scenarios which allow students to troubleshoot and build diagnostic and critical thinking skills. Two modes within the Simulation promote incremental learning: Training Mode has fixed scenarios to aid in initial familiarization with the equipment and the problem needing attention. The capabilities of the Simulation Challenge Mode are randomized with three levels: Beginner, Intermediate, and Advanced. Both modes require learners to diagnose a fault or faults and perform the repair successfully while materials and labor costs are tracked. Online access is for two years upon activation. The instructional design allows for full open engagement, so students do not have artificial guard-rails leading them to a conclusion.

Student Supplements

Delmar Online Training Simulation: HVAC 4.0, 4 terms (24 months) Instant Access  (ISBN-10: 1305584406 | ISBN-13: 9781305584402)

DELMAR ONLINE TRAINING SIMULATION: HVAC 4.0 is a 3-D, immersive simulation based on authentic troubleshooting scenarios. The first part of the simulation walks you through a series of tutorials covering electricity for HVAC, wiring diagrams, safety, and professionalism. The second part delivers HVAC troubleshooting simulations that will challenge you to master diagnostic and troubleshooting skills across seven pieces of HVAC equipment – Gas Furnace, Oil Furnace, Gas Boiler, Split Residential A/C, Commercial A/C, Heat Pumps, and Commercial Walk-in Freezers. In Delmar Online Training Simulation: HVAC 4.0 you'll find approximately 200 scenarios to help you learn troubleshooting procedures through practice and to enhance your critical thinking skills. You can choose between two modes: the Training Mode provides guided practice through fixed scenarios that will help you learn the equipment, understand the problem needing attention, and navigate in the simulation environment. The Challenge Mode offers randomized scenarios that you will troubleshoot independently. Both modes require you to complete the diagnostic steps and perform the repair successfully while materials and labor costs are tracked.