Setpoints and related data
The setpoints and related data include the following items:
- Fresh Air Intake Setpoint (MOAFlow-Sp)
- Fresh Air Intake Value (Fr-Air)
- Fresh Air Intake Max Sensor Range (MOA-Range)
- Fresh Air Intake Enable (FrAir-En)
Inputs
The input for air monitoring station reset is Fr-Air (0-10V input on the Econ board).
Operation
The fresh air max sensor range must match the range of the air monitoring station on the unit.
When the fresh air intake value falls below the fresh air intake setpoint the economizer damper position increases above minimum position until the fresh air intake value equals the fresh air intake setpoint +/- 40 cfm.
When the fresh air intake value rises above fresh air intake setpoint the economizer damper position decreases until the fresh air intake value equals the fresh air intake setpoint or it reaches minimum position setpoint.