We all create our own individual histories every day. At the same time, we become part of a larger history. With that in mind, we asked a few industry colleagues what the most significant changes were that they have witnessed in the HVACR industry.
Honeywell has announced that Bitzer has approved the use of HFC-407F (marketed by Honeywell as Genetron® Performax™ LT refrigerant in North America) as an HCFC-22 retrofit solution for medium-temperature systems, such as supermarket refrigerated cases.
The increased use of high pressure refrigerants has created new challenges for technicians, yet it is still possible to perform high speed recovery of high pressure refrigerants. The tips and practices in this article will help keep your refrigerant recovery speeding toward the finish.
Once every three years, the International Institute of Ammonia Refrigeration ups the ante within the expo portion of its annual conference by calling the expo a Heavy Equipment Show and including some especially large pieces of equipment. The most recent show in Orlando demonstrated the wide product range.
Carrier Corp. recently filed a petition with the U.S. Environmental Protection Agency (EPA), formalizing a request to reclassify a residential condensing unit as a subsystem of a system to extend the manufacturing prohibition to dry R-22 condensing units. The petition urges EPA to reconsider its current position and to issue a new rulemaking.
A lot of talk these days about natural refrigerants focuses on CO2, propane, isobutene, and the like. Stateside, they may be new kids on the block in terms of HVACR applications. But one natural refrigerant that has been around seemingly forever is ammonia. So it - like those “newcomers” - is drawing a lot of attention.
Actually, frost on the suction line only indicates that at the location where the frost is present, the suction line piping is below the dew point temperature of the surrounding ambient air and at or below 32°F. That’s it. It is neither an indication of a properly operating system nor a system defect.
In response to environmental concerns raised by the use of high global warming potential (GWP) refrigerants, the Air-Conditioning, Heating, and Refrigeration Institute (AHRI) is launching an industry-wide cooperative research program to identify and evaluate promising alternative refrigerants for major product categories.
Eurammon - a joint European initiative of companies, individuals, and institutions who advocate natural refrigerants - is calling for entries for the Natural Refrigeration Award which will be presented to the best scientific dissertation in the field of natural refrigerants.
At the Euroshop 2011 Expo in Dusseldorf, Germany, in March, Carrier Corp. introduced what it called “the latest innovations in CO2 and hydrocarbon refrigerant solutions, turnkey and heat recovery systems, and after-sales support and services for the food retail business.”
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