Belimo EP075+AKRX-E N4 Fiche Technique page 5

Fiche technique EP075+AKRX-E N4
Courbe de régulation The fluid velocity is measured in the measuring component (sensor electronics) and converted
to a flow rate signal.
The control signal Y corresponds to the power Q via the exchanger, the volumetric flow is
regulated in the EPIV. The control signal Y is converted into a linear characteristic curve and
provided with the V'max value as the new reference variable w. The momentary control
deviation forms the control signal Y1 for the actuator.
The specially configured control parameters in connection with the precise flow rate sensor
ensure a stable quality of control. They are however not suitable for rapid control processes, i.e.
for domestic water control. U5 displays the measured flow as voltage (factory setting).
Parametrizing V'max with ZTH:
U5 refers to the respective V'nom, i.e. if V'max is e.g. 50% of V'nom, then Y = 10 V, U5 = 5 V.
Parametrizing V'max with PC-Tool:
In the PC-Tool, the maximum flow rate to which U5 refers can be set individually. If V'max is
changed (e.g. to 70% V'nom), the U5 flow range is also automatically changed to the same value
(e.g. 70% V'nom: U5 = 10 V). This adjustment can be reversed by entering a value manually (U5
flow range = 100%: U5 refers to V'nom).
As an alternative, U5 can be used for displaying the valve opening angle.
Schéma fonctionnel
www.belimo.com EP075+AKRX-E N4 • fr-ca • 2023-02-03 • Sous réserve de modifications 5 / 10