24
PARAMETER
SYMBOL SHORT DESCRIPTION
UNIT default min max
step
2.5 MIN DRY PRES PD
Minimum working pressure
%
70
10
100
1
The parameter configures the minimum pressure must always be achieved by the system
within the time TD (TD see next parameter 2.5 DRY RUN TIME); is expressed as a percentage
of the working pressure (P1), and if is not achieved within the time TD, it means that the
system is DRY RUNNING.
PARAMETER
SYMBOL SHORT DESCRIPTION
UNIT default min max
step
2.6 DRY RUN TIME TD
Dry operating time before error of
water lack
s
10
0
100
1
The parameter configures the maximum “dry operating” time of the pump before this is
stopped and the DRY RUNNING error is displayed on the pump which had been running dry.
Known as dry running is the situation in which the selected pressure has not been achieved
and water flow is not detected in the pump.
To prevent stops due to false alarms, a suitable DRY RUN TIME parameter is 10 sec.
NOTE. By setting DRY RUN TIME at zero, the control function of dry operation is eliminated.
PARAMETER
SYMBOL SHORT DESCRIPTION
UNIT default min max
step
2.7 MIN POWERF1
x
Pump 1 minimum cosphi
-
0.1
0
1.0
0.01
2.8 MIN POWERF2
x
Pump 2 minimum cosphi
-
0.1
0
1.0
0.01
2.9 MIN POWERF3
x
Pump 3 minimum cosphi
-
0.1
0
1.0
0.01
2.10 MIN POWERF4
x
Pump 4 minimum cosphi
-
0.1
0
1.0
0.01
The parameter configures the value of the electrical parameter COSPHI (power factor)
corresponding to operation of the pump to dry (in the complete absence of water) with a
further safety margin of 0,03 – e.g. if cosphi to dry = 0,60 the parameter MIN POWERF1 =
0,60-0,03 = 0,57
PARAMETER
SYMBOL SHORT DESCRIPTION
UNIT default min max
step
2.11 POWERF TIME
x
Dry operating time before error of dry
run
s
4
0
15
1
This parameter configures the maximum time to "dry run" of the pump, before stop and
display the error DRY RUNNING COSPHI
It defines dry run the situation in which DGBOX detects the operation of the motor in the
total absence of load (rotor dry)
PARAMETER
SYMBOL SHORT DESCRIPTION
UNIT default min max
step
2.12
DRY RUN
RESTART
TR
Time interval before restarting after
error of water lack
min
10
0
100
1
The parameter sets the standby time before resetting the alarm and again starting the pump
in which dry operation was detected.
NOTE By setting DRY RUN RESTART at zero, the automatic restart function is eliminated. Such
restart must be made manually.
PARAMETER
SYMBOL SHORT DESCRIPTION
UNIT default min max
step
2.13 FLOW TIMEOUT
TF
Delay time before stopping
s
5
1
15
1
Indicates the delay time before stopping the pump when the set pressure has been achieved and the
flow request has ceased.
