In dry mode, the recirculating spray pump is deenergized (Fan on, Pump off). The process fluid
enters the cooler through the top coil connection and circulates through the finned coil with
the fans energized. Heat from the process fluid dissipates to the atmosphere by sensible heat
transfer through the tube wall and fins to the air passing over the coils. The coils are finned
to promote optimal airflow over the coil, and to maximize heat transfer area. Air is blown over
the finned coil by the fans. The cooled fluid then returns to the process via the bottom coil
connection. The unit will remain in the dry mode of operation until the temperature set point
can no longer be met. In this mode, NO water is used and plume is eliminated.