Italtecnica Sirio Entry 230 Manuel D'instructions page 29

SETTING OF "AUXILIARY CONTACT" PARAMETER = "2" – Remote on/off control
function
When the "AUXILIARY CONTACT" parameter is
set on "2" the Sirio Entry is set to be switched on and
off by remote control according to the system
requirements. This function is useful when there is the
need to programme the start of the motor pump at the
same time as other devices connected to one same
control unit, for example in irrigation systems where
the pump is switched on only when the irrigation
control unit activates one or more of the system's
solenoid valves. Connect the device according to the
wiring diagram shown here, bearing in mind that when
the external contact is open the Sirio Entry shall not start the pump even if the system reaches the
Pmin value, while when the external contact is closed the device shall operate according to the
values set.
SETTING OF "AUXILIARY CONTACT" PARAMETER = "3" – Second set-point
(Pmax2) function
When the "AUXILIARY CONTACT" parameter is
set on "3" the Sirio Entry is set to adjust the rotations
of the motor pump in accordance to the Pmax2
pressure value. This function is useful when the
device must temporarily work at a different pressure
to the one set in the Pmax parameter, for example if
distributors requiring different pressures are used.
Connect the device according to the wiring diagram
shown here bearing in mind that when the external
contact is open the Sirio Entry shall adjust the pump rotations according to the Pmax pressure
value , while when the external contact is closed the device shall adjust the pump speed according
to the Pmax2 value.
ATTENTION: incorrect wiring of the auxiliary contact may cause the low voltage
circuit to short circuit with consequent blowing of the fuse! Carry out the connection with
particular care
29
EXTERNAL
CONTACT
EXTERNAL
CONTACT