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PRESSURE SETS - COMMUNICATION BETWEEN DEVICES
Each model of Logic Series in the “COM” version is standardly equipped with interface and communication cable.
INSTALLATION AND PARAMETERS SET UP
Set the current values of all the devices on the Control panel.
Select the Master device and the Slave devices from the communication panel.
To change the set system pressure and cut-in values of both devices, act on the Master device only, even while the pumps
are running.
System pressure values and the cut-in values set on the Master device are automatically transferred onto the Slave
devices.
OPERATION
The Master device controls the Slave devices and manages the operation of the unit.
Initially,thepumponwhichtheMasterdeviceisinstalledwillstartuprst,butifthedemandforwaterissuchthatthis
pump is unable to maintain the set system pressure values, then the second pump on which the Slave device is installed
will automatically start up.
Everytimethepumpsstop,itwillbethesecond,thirdand/orfourthpumpetc.tostartuprst,dependingonhowmany
pumpsareinstalled,untilnallyreturningtotheMasterdeviceandsoon.
The alternation of start-up and operation of the pumps that constitute the pressure-set, guarantees a uniform wear therefore
longer life of the group.
Act only on the Master device to modify the set pressure values (also while the pumps are running), to connect
remote “on/off”, alarm and level probes.
Master - By pressing the button (red led on) the Master device is disabled and the unit stops.
Slave - By pressing the button (red led on) only the relative Slave device is disabled.
OFF
OFF
ALTERNATING THE PUMPS DURING CONTINUOUS OPERATION
If for any reason one or more pumps are working continuously, in order to guarantee uniform wear and tear of the pumps,
every sixty minutes of continuous operation of a pump, a forced exchange will be made with another pump on stand-by.
The changeover respects the alternating sequence of all the devices.
AUTOMATIC RESTART AND ANTI-JAMMING FUNCTION
In case of stopping due to a water shortage, the devices will automatically make 10 double attempts to rearm over the 24
hours following the failure, each lasting approximately 5 seconds to allow the pumps and the system to reload if possible.
After the last failed rearming attempt, the devices will remain permanently in alarm (red “Failure” led blinking) pending
manual rearming by pressing the Restart button.
The user can try to rearm the devices at any time by pressing the Restart button.
If for any reason the pumps remain idle for 24 consecutive hours, the devices will carry out a start up of the pump motor for
about 5 seconds without affecting the normal operation of the unit.
In case of a temporary blackout, the pressure set will automatically rearm once the electricity returns.
VARIABLE MASTER
In case of malfunctioning of the Master device, the system will transfer the operation to the Slave device immediately
upstream from the Master. Once the original Master device has been reset, it will automatically be reintegrated into the
system as a Slave device.
