When mechanical refrigeration came along, refrigerants such as sulfur dioxide and ammonia and the fluorocarbons were introduced. The latter two — ammonia and f-gases — are still being used. Of the fluorocarbons, the choices were pretty simple: CFCs -11, -12, and -502. It is not so simple these days.
Available as either air-cooled or water-cooled, the models of ice-only Symphony™ ice and water dispensers have expanded. These new ice-only models are extensions of the 25CI and 50CI Series.
The Electronic Unit Controller is designed for Copeland® condensing units with low-pressure controls. According to the manufacturer, electronic pressure-sensing accuracy maintains a tighter low-pressure control tolerance.
New Hampshire contractor Steve Berger is — like the state he lives in — somewhat of a nonconformist by his own admission. What does he do differently and how does he make it work?
A flurry of recent announcements is signaling some new directions for controllers that can be used in refrigeration applications. See what some of these new announcements and products have to offer.
Properly sizing and installing the suction line of a refrigeration system is very important to its overall operation. What happens when they aren’t installed properly and how can you avoid this?
Compressor electronics technology can enhance compressor and system performance by sensing and interpreting information found inside the compressor, providing new levels of protection and diagnostics.
The use of R-744 (carbon dioxide/CO2) as a refrigerant in HVACR applications has been gaining attention. But it faces installation and servicing challenges for technicians familiar with fluorocarbon refrigerants.
Photos from the 2013 ACCA Conference & IE3 Expo in Orlando, Fla.
Podcasts
Cade Clark, assistant vice president of government affairs for the Air-Conditioning, Heating & Refrigeration Institute (AHRI), gives a brief overview of the new version of the Shaheen-Portman bill, what AHRI thinks of the energy-efficiency legislation, and how it might affect the HVACR industry if it becomes law.
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