Patent ID: 8406930

Claim:
An air conditioning system for cooling an enclosure, the air conditioning system comprising: an air conditioner comprising: a refrigeration system including an evaporator coil, a condenser coil, and a compressor; a blower for blowing air over the evaporator coil and into the enclosure; and a damper for controlling an amount of outside air and return air provided to the blower; and a controller for controlling operation of the air conditioner, the controller operable to: monitor an electrical load of equipment in the enclosure; calculate a maximum acceptable outdoor temperature at which an economizer cycle of the air conditioner may be operated based at least partially on the electrical load; receive data representative of an actual outdoor temperature; initiate the economizer cycle if the actual outdoor temperature is equal to or below the maximum acceptable outdoor temperature; and modulate the damper to maintain a selected mix of outside air and return air provided to the blower in order to maintain a desired temperature in the enclosure while the air conditioner is in the economizer cycle, wherein the controller determines the selected mix of outside air and return air based on the maximum acceptable outdoor temperature and the actual outdoor temperature.