Evco c-pro 3 nano CHIL - Free-Cooling Regulation Valve

EVCO S.p.A. c-pro 3 nano CHIL | Application manual ver. 1.0 | Code 144CP3NCHE104
page 65 of 90
8.15.3 Free-cooling Regulation Valve
If the valve is ON/OFF type, the activation command will follow the consent step on the FC setpoint with PS08 hysteresis described
above.
To enable operation of the ON/OFF valve you need to set the associated digital output.
Alternatively, you can have a 0-10V modulating three-way valve to allow mixing of the water entering the evaporator for a combined
free-cooling action.
In this case, the valve is regulated proportionately starting from the consent step up until the maximum valve aperture threshold,
which corresponds to a percentage of the FC band
(parameter PS09):
To enable operation of the valve you also need to set the associated analogue output.
Input water temp.
FC setpoint
PS02
0 V
10 V
PS04
PS09
PS08