There are times when low evaporator heat loads, just ended defrost periods, failing or misadjusted mechanical valves, or simply lack of system maintenance can cause compressor floodback. If there is no way to prevent these periods of liquid floodback to the compressor, a suction line accumulator is needed on the system.

Net zero energy buildings, changes coming in domestic refrigeration, the future of turbo equipment, and trends in energy efficiency. Those were the topics during plenary sessions that started each morning at the every other year Purdue conferences dealing with HVACR.

The concurrent 21st International Compressor Engineering Conference, 14th International Refrigeration and Air Conditioning Conference, and 2nd International High Performance Buildings Conference showed how dramatically the issue of global warming is impacting the refrigerant aspect of the HVACR industry and how complex the issue is.

One type of starting relay used on fractional-horsepower compressors is the current relay. A defective current relay can cause a compressor not to start. One popular method of troubleshooting this type of starting relay is with an ohmmeter.

A focused product line of residential Copeland Scroll™ and reciprocating compressors bundled with high-quality components meet the growing need for aftermarket replacements, the company said. It is designed to provide contractors with everything needed to reliably replace a compressor.

Adding six smaller-capacity models to the product offering, the range of Performer® PSH heat pump scroll compressors has been extended. The scroll compressors now offer a heating capacity range of 19-80 kW (at evap. 19.4°F /cond. 122°/superheat 5K/subcooling 5K), due to innovative liquid injection technology.

What do a smart compressor, an indoor/outdoor undercounter refrigerator, and a reach-in refrigerator case have in common? All three are winners in The NEWS’ ninth annual Dealer Design Awards’ Refrigeration & Ice Machines category.

“Some compressor manufacturers claim nearly 40 percent of compressor warranty returns are attributed to burned-out start windings from incorrect hard start devices installed by service technicians,” said Riley Archer, national technical manager, RectorSeal® Corp.

Copeland’s Scroll™ UltraTech™ compressor line has been expanded; the next generation offers improved performance and reliability, as well as improved sound performance. The full line of models now includes updates for commercial and residential applications.

With a capacity of 25 tons of refrigeration, the Performer® SH295 scroll compressor for air conditioning has been added to the manufacturer’s large commercial scroll compressor portfolio. Cooling capacities range from 183 to 374 kBtuh/53 to 110 kW at 60 Hz and 150 to 310 kBtuh/44 to 90 kW at 50 Hz.