01 ICE MACHINES, FREEZERS & COOLERS THE HVACR CONTRACTOR’S WEEKLY NEWSMAGAZINE SINCE 1926 JULY 10, 2017 | $5.00 | ONLINE AT WWW.ACHRNEWS.COM | Defining, Understanding, and Applying Proper Subcooling Beginning technicians often have difﬁ culty understanding and calculating subcooling BY NICOLE KRAWCKE THE NEWS STAFF ubcooling can be a somewhat difficult topic for new techni-cians starting out in the indus-try. In fact, few topics garner as many questions from green techs than subcooling does. “A lot of technicians often ask, ‘What should my subcooling be?’ as opposed to fully understanding what it even is,” said Bryan Orr, cofounder and vice president of service, Kalos Services Inc., Clermont, Florida, and founder of HVACRSchool. com. “The actual range of required subcooling is not that great, so it’s not a super difficult question to answer in a simplistic form, but the actual under-standing of what it is and how it func-tions is more in-depth.” Orr has written several articles on HVACRSchool.com discussing the whole range of subcooling and specifically defin-ing exactly what it means. “There are a few things beginning techs should know, and the first is what it is,” he explained. “Subcooling tells you that you have a full line of liquid refrigerant in the liquid line. A lot of new techs, especially S FYI HVAC BRIEFS RESIDENTIAL CONTRACTOR Goettl Air Conditioning (Las Vegas) acquired Walton’s Heating and Air (Corona, California). MANUFACTURERS Carrier Corp.’s (Indianapolis) C™r thermo-stat, which is now enabled to work with Apple’s HomeKit, is now available for sale. Asahi/America Inc. (St. Lawrence, Missouri) named John Romano vice president of sales and marketing He boasts 29 years of industrial plastics distri-ROMANO bution experience. Bryant Heating & Cooling Systems (Indianapolis) named Chapman Heat-ing, Air Conditioning, and Plumb-ing (Indianapolis) its Bryant Dealer of the Year. continued on Page 5 ■ See SUBCOOLING | Page 16 SUBCOOLING 101: John Tomczyk, author and professor emeritus, Ferris State University, Big Rapids, Michigan, describes subcooling as the difference between the measured liquid temperature and the liquid saturation temperature at a given pressure. So, any sensible heat taken away from the 100 percent saturated liquid point in the condenser can be defined as liquid subcooling. Emerging From the Regulatory Tunnel Freezer and cooler manufacturers are primed to get back to customer-centric innovation BY RON RAJECKI THE NEWS STAFF T hese are interesting times for manufacturers of freezers and coolers and the contractors who install and service these essential commercial refrigeration units. U.S. Department of Energy (DOE) standards that took effect March 27 have caused freezer and cooler manufac-turers to improve their equipment’s daily kilowattage consumption to DOE-man-dated levels in order to sell their prod-ucts in the U.S. In addition, the industry has simul-taneously had to gear up for numerous refrigerant changes. Workhorse refrigerants R-134a and R-404A are set to be delisted by the U.S. Environmental Protection Agency’s (EPA’s) Significant New Alternatives Policy (SNAP) program for stand-alone medium-and low-temperature units. The EPA changes take effect Jan. 1, 2019, for stand-alone medium-temp units with a compressor capacity below 2,200 Btuh, and Jan. 1, 2020, for stand-alone ■ See FREEZERS | Page 12 FROSTlines eNewsle er FROSTlines is a FREE monthly eNewsle er, brought to you by the editors of The NEWS, developed speciﬁ cally for refrigeration Tweet @achrnews www.achrnews.com achrnews.c om contractors and distributors. eNewsle ers / Sign Up Today! Is Now Featured On Our Home Page! Go to achrnews.com and view real-time tweets from The NEWS and other HVACR professionals. Post comments to Twitter and include @achrnews.