This module controls a two position minimum outdoor air damper and a variable capacity minimum outdoor air injection fan. The two components are used to provide and control a minimum outdoor airflow. The module accepts a mode input, a flow and flow setpoint input, and an unreliable mode input which defines the module behavior when the flow sensor is unreliable. The module has a binary control output for the minimum OA damper, a binary and an analog output for the injection fan, and an output which gives PID status information. This module also incorporates tracking the overridden value of the actual output object (AO, PAO). The module resets the PIDs to default tuning parameters if the Reset PID Tuning input is not Normal.
Important: As of Release 5.0, the Min OA Fan Variable Capacity Flow Control v50 module replaces the Min OA Fan Variable Capacity Flow Control module.