York HVAC Catalogue 2018 EN 2019 EN | Page 62

YZ Magnetic bearing centrifugal chiller Cooling capacities from 581 kW to 4747 kW At Eurovent Standard Conditions this equipment meets A Class energy efficiency levels. The YORK ® YZ Magnetic Bearing Centrifugal Chiller is a revolutionary advancement that challenges everything about conventional chiller design. Built upon decades of industry-leading chiller expertise, our engineers questioned every component, analyzed every function and challenged every assumption. The result is the first chiller fully optimized for ultimate performance with a next generation low-GWP (global warming potential) refrigerant, delivering superior real- world performance, lower cost of ownership and a new definition of sustainability. It’s the first chiller built to exceed every expectation – today and tomorrow. The design premise for the YORK ® YZ was simple: Don’t just make a new chiller – make the best chiller for our customers. This was accomplished through a holistic approach to system design and engineering, optimizing every component around a carefully selected next generation refrigerant for ultimate performance. Magnetic Driveline Superiority The YORK ® YZ uses an integral, variable-speed drive and advanced magnetic bearing technology to deliver extraordinary efficiency, superior durability, simplified maintenance and a wider operating envelope than any chiller using oil- or refrigerant-lubricated compressor bearings. This driveline features a single moving assembly suspended in a magnetic field that does not require lubrication. With 80% fewer moving parts than traditional oil- or refrigerant-lubricated drivelines, longevity is enhanced and maintenance is reduced. 62