Viconics VWZS Application Guide Manuel d'utilisateur télécharger pdf (Page 28)

Economizer Mode and CO

Level Control

If the fresh air damper is to be used for both free cooling and CO

level control (economizer mode and CO

level control, but without fresh air measurement station), only the Min Pos, Max Pos, Min CO

and Max CO

parameters as well as the free cooling sequence will be active.

The FA Range parameter should be set to 0 CFM.

- Set AI4 parameter to CO

(0 VDC = 0ppm ; 10VDC = 2000ppm)

- Min Pos, Max Pos, Min CO

and Max CO

parameters should be set according to the required

setting.

Min Pos

Max Pos

Min CO

Max CO

Current

Fresh Air

Damper

Position

Current

Level

The higher value between free cooling output and interpolation output between the above graphic

will be the signal sent to the fresh air damper.

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Viconics VWZS Application Guide Manuel d'utilisateur Page 28