Nastec SUND 50, Installation And Use Manual

Page: 15 / 24

15
Parameter Default Description
M
PP
T
Co
n
stan
t
val
u
e
Fi
x sp
e
e
d
Co
n
st.v
al
u
e
2
set
Fi
x sp
e
e
d
2
val
.
Exte
rn
al
sp
e
e
d
3
Set value to be kept constant.
  
0
Value compensation at the maximum
frequency for each pump. Acting on
the green button you can reverse the
sign.

3
Set value to be kept constant.

0
Value compensation at the maximum
frequency for each pump. Acting on
the green button you can reverse the
sign.

5
Time to update set value for
compensation.
 
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.

Q
H
Min mot. freq. Max mot. freq.
Set value (3 bar)
4 bar
Pressure
sensor
300 m
Compensation (1 bar)
Set value
XXX.X [bar]
Compensation
XXX.X [bar]
Set value 2
XXX.X [bar]
Compensation 2
XXX.X [bar]
Set value update
XX [s]
Operating freq.
XXX [Hz]