Method and apparatus for controlling an air conditioning...

Details Method and apparatus for controlling an air conditioning... Method and apparatus for controlling an air conditioning...

F - Mech Eng,Light,Heat,Weapons

24

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F24F 1/02 (2006.01) F24F 11/00 (2006.01) F25D 16/00 (2006.01) G05D 23/20 (2006.01)

Patent

CA 1157649

A METHOD AND APPARATUS FOR CONTROLLING AN AIR CONDITIONING UNIT WITH MULTI-SPEED FAN AND ECONOMIZER ABSTRACT An apparatus and method for operating an air conditioning unit incorporating both an economizer and a two speed fan are described. When the economizer is in operation the fan is typically operated at high speed regardless of refrigera- tion circuit operation to circulate sufficient outdoor air to the enclosure. When the economizer is closed, indicating the outdoor air is too warm to provide cooling to the en- closure, the fan is typically operated at low speed saving fan energy. An override control is provided for operating the fan at high speed regardless of the outdoor temperature should sufficient cooling demand be detected.

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