Viconics VZ7656E Installation Guide - Manual (Page 29)

29 | VZ7656E1000W Installation Guide
Economizer Mode and CO
2
Level Control
If the fresh air damper is to be used for both free cooling and CO
2
level control
(economizer mode and CO
2
level control, but without fresh air measurement station), only
the Min Pos, Max Pos, Min CO
2
and Max CO
2
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 CO
2
(0 VDC = 0ppm ; 10VDC = 2000ppm)
- Min Pos, Max Pos, Min CO
2
and Max CO
2
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 will be the output to the fresh air damper.
Min Pos
Max Pos
Min CO
2
Max CO
2
Current
Fresh Air
Setpoint
Current CO
2
Level