EVCO EPK4BHQ1AH Installer manual - Manual (Page 76)

EVCO S.p.A. c-pro 3 NODE kilo AHU | Application manual ver. 1.0
page 76 of 114
6.12.2 Modulating valve control
In order to utilize only a proportional control you need to only set the integral time to zero (Pb02=0). Setting an
integral time greater than zero (Pb02>0) will provide a more precise control, the integral part is tasked with bringing
the output up to speed reducing the error introduced by the sole proportional component (by default the integral
component is disabled).
COOLING: proportional control of the cooling valve.
Note: the cooling valve is the same as that which is utilized for the dehumidification, thus the cooling control is also
influenced by the request for dehumidification; for additional information refer to paragraph “Dehumidification
control”.
HEATING: proportional control of the heating valve.
In the case where the flow sensor verifies an error it is possible to decide the value of the opening of the valve during
an alarm by setting the parameters Pb10 and Pb11 equal to 0.0%. In sensor error the respective valves remain
closed.
Running Set Point -
Supply
0%
T. Supply Pb01:
100%
NZ
Pb03
Running Set Point
- Supply
0%
T. Supply Pb01:
100%
NZ
Pb03