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Johnson Controls Inc., Building Efficiency: Variable-Speed Screw Chiller



The York® YVAA air-cooled variable-speed screw chiller uses R-134a refrigerant. Fewer joints and potential leak points keep the refrigerant inside the system, while a proprietary falling-film evaporator and advanced microchannel condenser coils reduce the refrigerant charge by as much as 15 percent, says the company. The YVAA chiller offers flexible energy consumption, with design efficiencies up to 11.6 EER. The unit can also be configured to deliver an integrated part load value (IPLV) up to 19.8 EER. The chiller provides a variety of sound-attenuation options. The chiller offers the SilentNight feature, which works with a BAS (or programmable control) to load-limit the chiller when noise reduction is a priority. When optimized for sound performance, the YVAA chiller can reduce ambient noise by as much as 16 dBa at off-design conditions. Building information modeling files for YVAA chillers are available on the Autodesk Seek site.

Johnson Controls Inc., Building Efficiency, P.O. Box 423, Milwaukee, WI 53201; www.johnsoncontrols.com

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