Johnson Controls introduced the YORK® YZ Magnetic Bearing Centrifugal Chiller. The company claims it is the first chiller fully optimized for ultimate performance with a next generation low-global warming potential (GWP) refrigerant — R-1233zd(E).
The YORK® YZ chiller uses an integral, variable speed drive and advanced magnetic bearing technology that features a single moving assembly suspended in a magnetic field that does not require lubrication. This technology requires 80% fewer moving parts than traditional oil- or refrigerant-lubricated drivelines. The result is enhanced reliability, reduced maintenance, and improved efficiency. Compared to traditional fixed-speed oil-bearing chillers, Johnson Controls officials said the YZ delivers up to 35% 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% of the time. The YZ operates with entering condenser water temperature as low as 40°F (4.5°C), providing enhanced performance in every operating condition and the widest operating envelope in the industry. The YORK® YZ uses an optimized 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.
Johnson Controls, York