Viconics VT7606E Installation Manual - Manual (Page 32)

32
| PIR Ready VT7600 Series-Installation Guide
028-0363-02
Economizer Mode, CO2 Level Control and Fresh Air Measurement Station
If the fresh air damper is to be used for both free cooling and CO2 level control with
a fresh air measurement station, only the Min FA, Max FA, Min CO2 and Max CO2
parameters as well as the free cooling sequence will be active.
- The FA Range parameter should be set to something other than 0 CFM.
- Use an air flow transmitter to read fresh air level with AI2 input (0-5 VDC
input)
- Min FA, Max FA, Min CO2 and Max CO2 parameters should be set according
to the required setting.
The highest value between free cooling demand output and interpolation output for
the fresh air setpoint based on the CO2 level will be the output to the fresh air damper.
Current CO
2
Level