Viconics VT7606E Installation Manual - Manual (Page 31)

31
| PIR Ready VT7600 Series-Installation Guide
028-0363-02
Economizer Mode and CO2 Level Control
If the fresh air damper is to be used for both free cooling and CO2level control (econo-
mizer mode and CO2 level control, but without fresh air measurement station), only
the Min Pos, Max Pos, Min CO2and Max CO2 parameters as well as the free cooling
sequence will be active.
- The FA Range parameter should be set to 0 CFM.
- Set AI1 parameter to CO2 (0 VDC = 0ppm ; 10VDC = 2000ppm)
- Min Pos, Max Pos, Min CO2 and Max CO2 parameters should be set accord-
ing to the required setting.
The highest value between free cooling demand output and interpolation output for
the fresh air setpoint will be the output to the fresh air damper.
Current CO
2
Level