The new GC Series central chiller from ACS, Schaumburg, Ill. (parent of AEC, Sterling, and Colortronic North America), has modules that range from 20 to 60 tons, allowing processor to add cooling capacity as the need arises, up to 300 tons. The units have hermetically sealed scroll compressors, stainless-steel brazed-plate evaporators, and a choice of shell-and-tube water-cooled condensers or aluminum micro-channel remote air-cooled condensers. They use EPA-compliant R410a refrigerant.
Electronic sensors with digital readout include leaving and entering fluid temperatures, compressor suction and discharge pressures, condenser inlet temperature, superheat, sub-cool, pump pressure and tank level. Options include hot-gas bypass, which allows the system to operate down to 20% of the smallest module capacity, and web access to the controller, permitting technicians to diagnose alarms and see real-time data remotely. The controller includes alarm history and capacity profile information.
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