Specifications include, but are not limited to: Surging: Chiller shall provide surge-free operation at l00% to 25% 7 capacity at maximum operating conditions specified including, but not 8 limited to, 42 deg.F. leaving chilled water temperature and 85 deg.F. 9 entering condenser water temperature with specified water flows. 10 11 Sound: Each chiller sound pressure level (SPL), in decibels (dB), with a 12 reference pressure of 20 micropascals, shall not exceed the values listed 13 herein. All ratings shall be in accordance with AHRI Standard 575-08, 14 "Method of Measuring Machinery Sound Within Equipment Rooms". Water chillers shall be complete with compressor and motor, evaporator, 27 condenser, lubrication system, capacity control and controller, motor 28 starter, instrument and control panel mounted and factory wired on the 29 machine, purge system, mounting isolation and other items as herein 30 specified. Magnetic Bearings: 8 9 Levitated shaft position shall be actively controlled 10 and monitored by an X-,Y- and Z-axis digital position 11 sensor. 12 13 The compressor shall be capable of coming to a 14 controlled, safe stop in the event of a power failure by 15 diverting stored power from the DC bus to the magnetic 16 bearing control system.