Setpoints
The setpoints and related data include the following items:
- Economizer enable (Econ-En) ON
- Power exhaust fan type (ExFType) non-modulating
- Econo damper position fan on (EconDmpPosFanOn)
- Econo damper position fan off (EconDmpPosFanOff)
Inputs
No inputs are present for non-modulating power exhaust.
Outputs
The outputs include the following items:
- 2 to 10 VDC from ECON
- 24 VAC from EX-FAN to energize exhaust fan
Operation
The control compares the economizer output to the economizer damper position fan on and off.
Next the control energizes the exhaust fan when the economizer output is greater than the economizer damper position fan on setpoint.
Finally, the control de-energizes the exhaust fan when the economizer output is less than the economizer damper position fan off setpoint.