Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 8, 2008
Patent Application Number
11140635
Date Filed
May 27, 2005
Patent Primary Examiner
Patent abstract
A control algorithm for controlling an economizer circuit in a chiller system is provided. The control algorithm opens and closes a port valve in the economizer circuit in response to predetermined criteria to engage and disengage the economizer circuit. The predetermined criteria can include an operating parameter of a compressor and a level of liquid refrigerant in a flash tank.
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