01 COMPRESSORS THE HVACR CONTRACTOR’S WEEKLY NEWSMAGAZINE SINCE 1926 MARCH 27, 2017 | $5.00 | ONLINE AT WWW.ACHRNEWS.COM | Now Trending: HVACR L BY JOANNA R. TURPIN THE NEWS STAFF FYI HVAC BRIEFS AS VEGAS — While many edu-cational sessions were presented at the Air-Conditioning, Heating, and Refrigeration (AHR) Expo, perhaps the most popular was the course on global HVAC trends offered by the Building Services Research and Informa-tion Association (BSRIA). The research organization, which specializes in inter-national heating, air conditioning, renew-ables, and building controls markets, provided the results from its recent com-prehensive analysis of current and future HVAC markets around the world. This is the second consecutive year BSRIA pre-sented this information and its findings were similar to last year with the excep-tion of the global uncertainty surround-ing Brexit and the election of President Donald Trump. RESIDENTIAL CONTRACTOR American Residential Services (Mem-phis, Tennessee) acquired Comfort Heating & Air (Lexington, Kentucky). MANUFACTURERS RGF Environmental Group Inc. (Riv-iera Beach, Florida) named Trish Alfele con-tractor support specialist, providing information, support, assistance, and ALFELE training for contractors. Fresh-Aire UV (Jupiter, Florida) named James Beavers director of commercial sales. He previously held sales and business development positions at ECR Intl. BEAVERS Inc. (Utica, New York). Stanley Black & Decker (New Britain, Connecticut) completed its purchase of the Craftsman brand from Sears Hold-ings Corp. (Hoffman Estates, Illinois). Regal Beloit Corp. (Beloit, Wisconsin) hosted an Investor Day in New York City on March 10. WALL-HUNG WINNERS: Although only introduced to the U.S. market five years ago, wall-hung boilers now account for 34 percent of the market. PHOTO COURTESY OF LAARS HEATING SYSTEMS continued on Page 5 COOLING MARKETS Last year was not a great year glob-ally for the air conditioning market, but things are looking up, said Anette Holley, general manager of AC&R consultancy, BSRIA. “The Chinese market started to slow down in 2015, but in the second half of 2016, there was a boost due to warm weather and residential construction, I See HVACR | Page 14 Troubleshooting a Compressor Burnout Compressor burnouts are rare but knowing how to deal with them is essential C BY RON RAJECKI THE NEWS STAFF ompressor failure can be traced to a number of system issues, including high condensing pres-sures, refrigerant floodback, ser-vice or replacement issues, a loss of charge, liquid slugging, motor burnout, and more. Compressor burnout is a very specific mode of failure that may be caused by high temperatures in the motor windings or discharge area of the compressor. High temperatures break down the motor wind-ing insulation, which may cause a loss of electrical resistance and result in a short to the ground or even an open winding. If the oil breaks down, it can no longer provide adequate lubrication, which may cause the bearings or pistons to seize. When a compressor fails, a compre-hensive “autopsy” is necessary to properly correct the issue. “Getting a system up and running after a compressor burnout requires certain steps that, if done correctly, may be the difference between years of trouble-free operation or only a few months before the replacement compressor also fails and needs replacement,” said Jamie Kitchen, a trainer at Danfoss. The Emerson logo is a trademark and a service mark of Emerson Electric Co. © 2017 Emerson Electric Co. CAUSES AND CULPRITS According to Kitchen, the main causes of burnout are insufficient cooling from the suction gas as well as compressor operation outside of its application enve-lope. High condensing pressures are a common culprit. Since the returning gas (suction) provides a large portion of the cooling for the compressor motor, if there I See BURNOUT | Page 13 Follow The NEWS on Twi er LEADER INHVACRNEWS! FOLLOWTHE > www.twitter.com/ACHRNews Follow The NEWS on Facebook > www.facebook.com/ACHRNews Follow The NEWS on LinkedIn > http://linkd.in/oGYNol The blueprint for comfort starts with Copeland Scroll ™ modulation. See details inside.