Italtecnica Nettuno 3P-13A Manuel D'instruction page 42

GROUP 0 - PRESSURE PARAMETERS
0.0 Pressure
setpoint 3.0 BAR
delivery pressure of the pump, to ensure specific modulation of the pump itself and consequent energy savings
0.1 DeltaP
pump 1.0 BAR
value as close as possible to that set in the pressure set point parameter. The minimum differential settable between
Pmax and Pmin is 0.3 Bar, with the recommended value being at least 0.5 Bar
0.2 Dry Running
Press. 0.5 BAR
up pressure (obtained from the difference between the set point and the deltaP values described above). Operation of
the protection device should be tested after installation. Also take into account the water column on outlet, if
present.
0.3 Over
Limit 16.0 BAR
0.4 Pressure
point2 3.0 BAR
0.5 DeltaP
immed. 1.5 BAR
0.6 Measurement
unit
0.7 Pres.Sens.
Scale 16.0
0.0 – Pressure set point: this parameter enables entry of the device set
point. It is a constant pressure value required by the system (maximum
pressure). During its operation, Nettuno adjusts the electric pump revs to
adapt them to the actual demand from the utilities, therefore maintaining a
constant system pressure. The set value must be below the maximum
0.1 - Pump start-up Delta P: this parameter sets the the negative pressure
start
delta compared to the pump start-up set point. On opening of any type of
utility, the pump will not start-up until the system pressure has fallen below
the set point by a value equal to the delta set in this parameter. After the
motor is started up, the rotation speed is controlled to maintain the pressure
0.2 – Dry running pressure: set a minimum pressure value, below which
the dry running protection device trips due to lack of water. In the case of
pump operation at maximum speed, if the pressure in the system falls below
this value, the inverter stops the motor. To ensure correct operation of the
protection device, the settable value must never be higher than the set start-
0.3 - Limit pressure: this parameter sets the limit for the over-pressure
press.
protection to intervene.
Tripping of the over-pressure protection stops operation of the inverter until
it is reset by the user.
0.4 – Pressure 2 set point: this parameter enables entry of the secondary set
set
point of the device. When the I/O board input is closed externally, the
pressure value set in this parameter becomes the new set point , according to
which Nettuno regulates the revs of the electric pump (see also parameter
3.1).
0.5 - Immediate stop Delta P: this parameter sets the positive pressure delta
compared to the set point for immediate shutdown of the pump. During
stop
normal operation, when the valves close, the pump stops after a time set in
the parameter "stop delay". In any event, if the system pressure exceeds the
Pmax value of a delta greater than the value set in this parameter, the pump
will stop immediately to avoid overpressure which may damage the system
0.6 - Unit of measurement: select the unit of measurement in BAR or PSI
BAR
0.7 – Sensor full scale: this defines the full scale of the connected pressure
sensor. It is compatible with pressure sensors from 0-6 bar up to 0-16 bar or
from 0-100 PSI up to 0-250 PSI, with current signal 4÷20mA
BAR
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