Italtecnica Nettuno 3P-13A Manuel D'instruction page 39

0.1 DeltaP
startpump
BAR
0.2 Dry running
press 0.5 BAR
interval. To ensure correct operation of this protection device, the settable value must never be higher than the set
start-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.
0.0 BAR
Stand-by
2.5 BAR
Running
CONFIGURATION FOR MULTIPLE INSTALLATIONS
In the case of installation with multiple pumps, great care must be taken on initial start-up, to ensure that the
addresses of all devices are set correctly and to avoid serial communication errors.
The initial configuration procedure is shared among devices only for the common parameters (e.g. operating
pressures), while the independent parameters (such as the serial address and maximum motor current) are set
individually on each device.
On activation, when the welcome screen is displayed; press the central key on all connected devices and then
proceed with setting the serial addresses.
Confirm entry of the serial address on all devices by pressing the central key on each inverter.
On each Nettuno, set the motor current absorption value and confirm the value by pressing the central key on
each device.
WAIT A FEW SECONDS UNTIL ONE OF THE DEVICES IS SET AS MASTER (illumination of blue light)
then continue setting the parameters exclusively via the keypad of the MASTER device; the set values will be
shared and transmitted automatically to the other connected inverters
Parameter 0.1 – Pump start-up DeltaP: set the value of the negative
Delta with respect to the set point pressure for pump start-up. For example,
if the set point is 2.5 and the DeltaP is 0.3 bar, the pump starts up at values
1.0
below 2.2 bar.
Parameter 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 shuts down the motor after a set delay
0 Hz At the end of the configuration procedure the display shows the main
operation screen. The device is set to stand-by, and therefore with the motor
stopped.
40Hz
Press the central key to exit standby status and start the pump.
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