Commercial controls prove their worth with all the data and other information they provide on the building and the work they perform day to day. Three products have been selected to receive awards in The NEWS’ ninth annual Dealer Design awards in the Commercial Controls category.
Frost or ice buildup is a normal part of any freezer operation, and is removed by using heated defrost cycles at timed intervals. During normal operation, the amount of this buildup should not get to the point that problems will occur. However, in some abnormal circumstances, it can lead to problems.
Small businesses come and go, that’s a given. All sectors of the business community, including the HVAC contracting trade, are affected. That creates a lot of turmoil — or opportunity — for small business owners who see a chance to grab a bigger share of the market as competitors fold their tents.
Now that the Environmental Protection Agency (EPA) has approved the use of three hydrocarbon (HC) refrigerants in some smaller appliance applications, advocates of HCs are continuing to promote use in larger equipment, with commercial ice machines as well as reach-in/walk-in freezers and coolers possibly next in line.
The most recent Food Marketing Institute Expo in Dallas and National Restaurant Association Restaurant-Hotel-Motel Show in Chicago brought out the very latest in ice-making equipment, storage bins, and walk-in freezers and coolers as well as reach-in versions. This roundup of the latest in equipment is culled from both shows.
When talk first surfaced a number of years ago about using R-744 (CO2) in commercial refrigeration, there were two challenges — making the refrigerant work as a stand-alone in transcritical applications as well as in cascade systems and developing the components to make such approaches possible. Where does the refrigerant stand currently?
Source: Air-Conditioning, Heating, and Refrigeration Institute (AHRI). Industry figures are estimates that are derived from the best available figures supplied by a sample of AHRI member companies.
The conversation on ways to make ammonia work in a wider range of refrigeration applications is drawing increasing attention these days. At the most recent International Institute of Ammonia Refrigeration (IIAR) conference in Milwaukee, technical presentations covered its uses in supermarkets, with heat pumps, in absorption refrigeration, and in conjunction with CO2.
The three functions of the condenser are desuperheating, condensation, and subcooling. Read to find out more about what the Professor has to say about these three topics.
Manufacturers are increasingly designing their systems with unique controls and features that may apply only to their systems. Servicing, installing, and maintaining these new systems can be challenging. Sometimes they require us to reference material provided by the system or component manufacturer. Without this reference material, servicing, installing, or maintaining many of these new systems may be quite difficult or at times even impossible. What is a contractor to do?
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