System and method for controlling an economizer circuit
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United States of America Patent
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Mar 1, 2011
Grant Date -
Aug 7, 2008
app pub date -
Apr 7, 2008
filing date -
May 28, 2004
priority date (Note) -
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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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