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Apr 2021
2021 Refrigerant Rulemaking
THE REGULATION OF REFRIGERANTS continues to be a source of great uncertainty in the commercial refrigeration industry. At the heart of this issue is the potential for carbon emissions from hydrofluorocarbon (HFC) refrigerants and their collective contribution to climate change.
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Apr 2021
Troubleshooting: Too Young to Die
We had a compressor fail that was just seven years old. Some people would say “that is an old compressor,” however, for this application, it is not. Refrigeration compressors should give many years of service unless there are unusual circumstances. A brief description of the system follows.
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Apr 2021
Training Corner: Refrigerant Manufacturer Looks to the Future with Webinar Series
Every year the refrigerant landscape changes with new rules and regulations. Every day HVACR techs find themselves in the field tackling jobs that require them to not only be aware of proper regulations but also use them correctly.
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Apr 2021
Last Word: The Change Necessary to Evolve
Itook the back page this month to stretch my verbal legs a bit. I have a few big announcements that I realize are better suited for the front of the issue, but sometimes space constraints in magazine production terms have the final say—and so this month, so do I.
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Apr 2021
Leading Off: Something in the Air
If you saw EVP Lori Schiavo’s article in the March issue of the RSES Journal, you know that there was a high level of carbon monoxide in the office in February. The reading that the gas company representative got was 50 ppm. In doing some research for this article, I found varying opinions on what levels are CO exposures are acceptable. None of them say that 50 ppm are good for long periods of time.
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Mar 2021
Cast Iron: When, Where, and Why?
The internet has changed every aspect of the way we live. More and more people are doing their shopping on the internet; need shampoo, order online; need laundry detergent, order online. How does it affect the HVAC and plumbing industry?
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Mar 2021
Bringing Safety and Sustainability to Ice Machines
According to a study from John Hopkins Bloomberg School of Public Health, a single foodborne illness outbreak at a fast-casual establishment could cost a quick-service restaurant between $6,330 and $2.1 million, casual-dining operations between $8,030 and $2.2 million and fine-dining establishments between $8,273 and $2.6 million per incident.
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Mar 2021
Understanding the Basic Refrigeration Cycle
Ensuring refrigeration systems operates effectively and efficiently requires a fundamental understanding of the refrigeration cycle and how each component works together.
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Mar 2021
Relays and Contactors: Part 2
Impedance relays are also called lock-out relays, reset relays, and anti-short cycle controls. All of these terms refer to the same device and the same function. Figure 5-15 shows a typical lock-out relay circuit.
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Mar 2021
Troubleshooting: Too Hot to Handle
I had a call for a routine furnace inspection. The customer said “It’s just a furnace check-up, everything is fine. “This is a 1,400-sq-ft, three bedroom house with a 75,000-Btuh 80% furnace and a 3-ton A/C. Maybe a little oversized for the San Antonio, TX area, but in the ballpark.
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Results: 2360 Articles Found
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