VASCO Inverter O&M Manual
49
Parameter
Default
Description
Constant v
a
lu
e
Fi
x speed
Const.v
al
ue 2 set
Fi
x speed 2 val.
External sp
eed
To ensure proper operation of pressure control is recommended to place the sensor near the pump.
To compensate the pressure loss in the pipes (proportional to flow) it is possible to vary the pressure set in a linear
relation with respect to frequency.
It can perform the following test to verify the correct value of compensation:
1. install a pressure gauge away from the pressure sensor
2. open completely the valve
3. check the pressure gauge
--> Set the value of
compensation
. equal to the difference of the values from the two gauges.
When using a group of pumps, the pressure compensation to be applied to each pump is equal to the total pressure
compensation (when all the pumps are running at full speed) divided by the number of pumps in the group.
50
Frequency value to feed the pump.
9
50
Frequency value to feed the pump.
9
50
Minimum frequency below which the
pump tries to stop.
9
9
9
5
Delay for which the pump tries to stop
below freq.min.control.
9
9
9
20
Ramp time from freq.min.control to
min.motor freq. If, during this time, the
read value goes below the (set value -
delta control), VASCO powers the motor
9
9
9
Q
H
Min mot. freq.
Max mot. freq.
Set value (3 bar)
4 bar
Pressure
sensor
300 m
Compensation (1 bar)
Operating freq.
XXX [Hz]
Operating freq. 2
XXX [Hz]
Freq.min.control
XXX [Hz]
Stop delay
XX [s]
Control ramp
XXX.X [s]
