EBARA Press-o-Matic Bedienungsanweisung Seite 10

SETTING OF "AUXILIARY CONTACT" PARAMETER = "2" – Remote on/off control function
W hen the "AUXILIARY CONTACT" parameter is
set on "2" the Press•o•Matic is set to be switched on
and off by remote control according to the system
requirements. This function is useful when there is t
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 wher
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 th
wiring diagram shown here, bearing in mind that whe
the external contact is open the Press•o•Matic sha
not start the pump even if the system reaches the Pmin
the device shall operate according to the values set.
SETTING OF "AUXILIARY CONTACT" PARAMETER = "3" – Second set-point
(Pmax2) function
W hen the "AUXILIARY CONTACT" parameter is
set on "3" the Press•o•Matic is set to adjust the
rotations of the motor pump in accordance to the
Pmax2 pressure value. This function is useful wh
the device must temporarily work at a different
pressure to the one set in the Pmax parameter, fo
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 Press•o•Matic shall
adjust the pump rotations according to the Pmax
pressure value , while when the external contact is
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.
he
e
e
n
ll
val ue, while when the external contact is closed
en
r
closed the device shall adjust the pump speed
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EXTERNAL
CONTACT
EXTERNAL
CONTACT