Johnson Controls has introduced the YORK YZ Magnetic Bearing Centrifugal Chiller, a chiller optimized for performance with a next generation low-global warming potential (GWP) refrigerant, R-1233zd(E). Chosen for its efficiency, safety, availability, low environmental impact and cost, nonflammable R-1233zd(E) has an ultra-low GWP of 1 and is available from refrigerant manufacturers.
Johnson Controls used a holistic approach to system design and engineering, optimizing every component around the next generation refrigerant for ultimate performance. The YORK YZ chiller uses a variable speed drive and magnetic bearing technology that features a single moving assembly suspended in a magnetic field that does not require lubrication. This technology requires 80 percent fewer moving parts than traditional oil- or refrigerant-lubricated drivelines. The result is reduced maintenance and efficiency. Compared to traditional fixed-speed oil-bearing chillers, the YZ delivers up to 35 percent annual energy savings.
The YZ chiller can deliver energy savings and lower operating costs by taking advantage of the off-design conditions where chillers operate 99 percent of the time. The YZ operates with an entering condenser water temperature as low as 40 F (4.5 C), providing performance in every operating condition. The YORK YZ uses a single stage design to provide energy efficiency. The chiller can also operate with condenser temperatures below the evaporator temperatures, eliminating the need for a water-side economizer, which simplifies the system; requires less mechanical room space; and saves money on components, piping, controls and maintenance.
The YZ chiller brings together YORK innovations refined over decades of use to create a revolution in chiller design and optimization. It represents a solution from the chiller experts, who like to think of the YORK YZ chiller as tomorrow’s chiller that is available today.