Xylem HYDROVAR HV 4.150 / 4.185 / 4.220 - Manual (Page 68)

68
0240
0240 RAMP FMIN D
2.0 sec
Ramp F
min
deceleration
Possible settings: 1.0 – 25.0 sec
Fast running down time, to stop the HYDROVAR immediately below the selected
MIN. FREQUENCY [0250].
• Excessively fast running down time tends to cause an error (OVERVOLTAGE)
0245
0245 MAX. FRQ.
50.0 Hz
Maximum frequency
Possible settings: 30.0 – 70.0 Hz
This parameter determines the maximum speed of the pump.
The standard setting is according to the nominal frequency of the connected motor.
Settings higher than standard may overload the motor!
Settings of 10% above nominal frequency cause 33% higher power
consumption!
0250
0250 MIN. FREQ.
20.0 Hz
Minimum frequency
Possible settings: 0.0 – f
max
(0.0 – 30.0 Hz if [203] is 00 (default)
At operation below the set min. frequency the HYDROVAR operates with the fast ramps
[0235/0240].
As per default the max. setting of this parameter is limited to 30Hz. To
enable the MIN. FREQ. for settings > 30Hz first the parameter [203] must
be changed to setting 01 or 02 -> see page 64 for more detailed
information.
The min. frequency depends on the selected pump type and application.
Especially for borehole applications the min. frequency must be set to ~30Hz.
0255
0255 CONF. FMIN
f -> 0
Operation at minimum frequency
Possible settings: f->0 or f->f
min
f->0: After reaching the required pressure and no further consumption the frequency is
going down to the selected MINIMUM FREQUENCY [0250] and the HYDROVAR will keep
running for the selected FMIN TIME [0260]. After this time the HYDROVAR will stop
automatically.
G
G
G
G