Johnson Controls Introduces YVAA Air-Cooled Variable-Speed Screw Chiller
March 1, 2011
Johnson Controls recently introduced its York YVAA air-cooled variable-speed screw chiller, which can be tailored and tuned to offer efficiency, reduced sound and sustainability.
On replacement projects, YVAA energy performance can exceed that of older chillers by as much as 50%, according to the company, while performance on new projects can exceed competitors’ chillers by up to 25%. In addition, the chiller’s performance can be tailored and tuned to hit specific targets for state, municipal or utility rebates, where available.
The chiller also offers flexible energy consumption, with design efficiencies up to 11.6 EER. The unit can be configured to deliver an integrated part load value (IPLV) up to 19.8 EER. In addition to a variety of sound-attenuation options, the YVAA offers its 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, said the company.
The YVAA chiller uses HFC-134a refrigerant, which has no phase-out date and an ozone-depletion potential of zero. 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%. No cooling tower is required, and because power generation is a major water consumer, the high efficiency of the YVAA chiller conserves water.