beautypg.com

Viconics VT7606E Installation Manual User Manual

Page 30

background image

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.