Johnson Controls, Milwaukee, WI, recently launched an expanded YORK YZ Magnetic Bearing Centrifugal Chiller platform in North America and Latin America markets.
This expansion in capacity (up to 2,020 tons) builds on the manufacturer’s YORK YZ chiller line that’s optimized around the environmentally friendly, low-GWP refrigerant R-1233zd(E), and utilizes an inherent series counterflow design with patented heat exchangers.
The advanced, aerodynamic design of the YZ chiller includes two, single-stage compressors paired in a series counterflow arrangement, reducing the lift on each compressor to improve overall full-load and off-design performance. The dual compressor design allows for each compressor to run individually, providing redundancy and improved off-design performance at lower loads. The design also increases turndown capabilities at low loads by continuing to provide cooling on one circuit in the unlikely event of a failure or an unplanned shutdown.
According to the company, extending the use of magnetic bearings to higher-tonnage chiller equipment increases opportunities for sites to realize reduced driveline maintenance and lower operating costs that magnetic-bearing technology can provide.
