Viconics VT7606E Installation Manual - Manual (Page 30)

30
| PIR Ready VT7600 Series-Installation Guide
028-0363-02
Economizer Mode and Fresh Air Measurement Station
If the fresh air damper is to be used for both free cooling and minimum fresh air vol-
ume control (economizer mode and fresh air measurement station, but without CO2
level control), only the Min FA parameter and the free cooling sequence will be active.
- The FA Range parameter should be set to a value higher than 0 CFM (0 CFM
disables the fresh air control).
- Min FA (minimum fresh air) parameter should be set to the desired level.
The FA Range parameter value should be set to the maximum capacity of the fresh
air measurement station. Therefore the relationship between air volumes and input
signals can be established. For example, if the fresh air station capacity is 10000
CFM, set FA Range to 10000.
This will set the relationship of
0 VDC = 0 CFM and 10VDC = 10000 CFM.