Xylem hydrovar - Page 63

P240 RAMP FMIN D
G
NOTICE:
Fast running down time often causes overvoltage.
P240 RAMP FMIN D
2.0 sec
Actual Value Output Freq.
Left fct. Up fct. Down fct. Right fct.
This parameter (default value 2.0 sec, possible setting 1.0- 25.0 sec) sets the ramp Fmin
deceleration (fast running down time), and it stops HYDROVAR when it gets below P250
MIN.FREQ. For more information, see Example: P200 Ramp Settings.
P245 MAX.FREQ.
G
NOTICE:
Settings higher than standard can cause overload of the motor.
P245 MAX.FREQ.
50.0 Hz
Actual Value Output Freq.
Left fct. Up fct. Down fct. Right fct.
This parameter (default value 50 Hz, possible setting 30.0- 70.0 Hz) sets the maximum
frequency, and thus the maximum speed of the pump; the standard setting according to
the nominal frequency of the connected motor.
P250 MIN.FREQ.
G
NOTICE:
The minimum frequency depends on the selected pump type and application. For
borehole applications in particular, the minimum frequency must be set to ≥ 30 Hz*.
P250 MIN.FREQ.
20.0 Hz
Actual Value Output Freq.
Left fct. Up fct. Down fct. Right fct.
This parameter (default value 20 Hz, possible setting 0.0 Hz- P245 MAX.FREQ.) sets the
minimum frequency; operations below this value are done with P235 RAMP FMIN A and
P240 RAMP FMIN D.
P255 CONF.FMIN
G
This parameter defines the operation at minimum frequency.
8 Programming
HVL 2.015-4.220 Installation, Operation, and Maintenance Manual 61