The Waterside Economizer Suitability module defines the suitability of central plant waterside economizer cooling based on outdoor air conditions and current building load. Economizer cooling is considered suitable if the outdoor air wet bulb temperature is less than a user-defined setpoint and if the current building load is less than the available heat exchanger capacity. The module also has a Network Free Cooling Available command input that can be used to define economizer suitability. This module is implemented as a control activity. For more information, refer to the Johnson Controls Central Plant Optimization™ 10 Application Note (LIT-12011575).