Italtecnica Sirio Universal Manual De Programación página 12

INSTALLER PARAMETERS:
These parameters can be found on hidden pages and usually they should only be changed in the installation phase. To access these pages
switch the device to Stand-by and keep the "+" and "-"buttons pressed down together for 5 seconds. Once you have entered the hidden menu,
use the"<<" and ">>" buttons to scroll the pages and the "+" and "-" buttons to change the parameters. To return to the main page press the
button in the centre. Some parameters may not be displayed if the relative function is not enabled.
Pmax
3.0 BAR
through it falls below the minimum values (approx. 2 litres/minute) irrespective of the pressure reached in the system.
Dp.start
0.5 BAR
minimum differential settable between Pmax and Pmin is 0.3 Bar, with the recommended value being at least 0.5 Bar.
P.dr.ru.
0.5 BAR
P.Limit
9.0 BAR
Pmax2
9.0 BAR
Dp.stop
0.5 BAR
Unit
BAR
Imax
0.5 Amp
overload will accelerate the trip time. On activation of the device, if the Imax parameter is set at 0.5 A (factory setting), the display
automatically shows the settings page of the maximum current and no action is permitted until the absorption limit value is set.
Rotat.
-->
Min.fre.
25 Hz
Stop fr
30 Hz
frequency value.
Pmax: this parameter enables entry of the set-point value of the device. It is a constant pressure value required
by the system (maximum pressure). During its operation Sirio regulates the revs of the electric pump to adapt
them to the actual required flow-rate, therefore maintaining the constant pressure of the system. When it is
necessary to set the Pmax to a value higher than the maximum pump head, motor shut down on valve closure is
only guaranteed if the flow switch is activated, as Sirio switches off the pump when the flow of water passing
Delta P start-up: this parameter sets the delta negative of pressure compared to Pmax for the start-up of the
pump. On opening of any type of utility, the pump will not start-up until the system pressure has fallen below
Pmax by a value equal to the delta set in this parameter. After the motor is started up, the operating rotation
speed is controlled to maintain the pressure value as close as possible to that set in the parameter Pmax. The
Dry-running pressure: this parameter only affects operation with the flow switch deactivated. Define the
minimum pressure value below which, with the motor at maximum frequency, the protection against dry-
running triggers.
Pressure limit: this parameter sets the threshold for the overpressure protection intervention.
The overpressure protection intervention stops the inverter until the user resets it.
Pmax2: this parameter enables entry of the secondary set-point of the device. When the auxiliary contact (or the
auxiliary I/O board input) is closed externally, the pressure value set in Pmax2 becomes the new set-point,
according to which Sirio regulates the revs of the electric pump.
Delta P stop: this parameter sets the positive pressure delta compared to Pmax for immediate shutdown of the
pump. During normal operation, when the valves close, the pump stops after a time set in the parameter "stop
delay". In any case, if the system pressure exceeds the Pmax value of a delta greater than that set in this
parameter, the pump will stop immediately to avoid overpressure which may damage the system.
Unit of measurement: select the unit of measurement in BAR or PSI
Imax: this parameter enables entry of the maximum current absorbed by the electric pump in routine
conditions, to enable shut-down of the motor in the event of excessive absorption. The motor is also shut down
if the current read during operation is below 0.5 A following interruption of the connection between the motor
and Sirio. The trip time of the current overload safety device is inversely proportional to the entity of the
overload in progress; therefore a slight overload will lead to a more delayed trip time while a more significant
Rotation direction (only for three-phase pump version): this screen enables the user to invert the direction of
rotation of the electric pump without modification to the electric motor wiring. To modify the direction of
rotation of the motor, use buttons "+" and "-"; the direction indicated by the arrow has a purely indicative value
and does not reflect the actual sense of rotation which must be verified by the installer.
Minimum frequency: this parameter defines the minimum frequency at which the pump starts up and stops.
For three-phase pumps a value of 25Hz is advised, for single-phase pumps 30Hz.Also consult the information
supplied by the manufacturer of the electric pump to determine at what minimum frequency value the connected
electric motor can operate
Stop frequency: only during operation without the flow switch, this parameter determines the minimum
frequency value below which the motor will stop. During adjustment, if the Pmax pressure value is reached and
the frequency of the motor is below this value, the inverter will attempt to stop the motor. If all the utilities are
closed and the pressure remains constant the pump will stop correctly. If the pump does not stop, try to increase
this value. By contrast, if the pump carries out continuous start-up and stop cycles, try to lower the stop