Xylem HYDROVAR HV 4.150 / 4.185 / 4.220 User Manual
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The following 3 parameters are responsible for starting the assist pumps and to calculate
the new required value as well.
0505
0505 ACT.VAL.INC.
0.35 Bar
Lift value
Possible settings:
0.00 – to the pre selected sensor range
0510
0510 ACT.VAL.DEC.
0.15 BAR
Drop value
Possible settings:
0.00– to the pre selected sensor range
0515
0515 ENABLE FRQ
48.0 Hz
enable frequency for the next power unit
Possible settings:
0.0 – 70.0 Hz
Using this parameter the desired release frequency for the following pumps can be
selected. If a pump in the system reaches this frequency and the system pressure drops
below the REQUIRED VALUE [02] - ACTUAL VALUE DECREASE [0510], the next pump is
started.
0520
0520 ENABLE DLY
5 sec
Enable delay time (for cascade relay only!)
Possible settings:
0 – 100 sec
If the conditions for starting an assist pump are fulfilled, the fix speed pump will start after
this selected time.
0525
0525 SW DELAY
5 sec
Switch delay (for cascade relay only!)
Possible settings:
0 – 100 sec
Delay time between two switching actions of the fix speed pump.
That parameter prevents the system against repeated switching actions caused by the
variation of the consumption.
0530
0530 DISABLE FRQ
30 Hz
Disable frequency (for cascade relay only!)
Possible settings:
0.0 – 120.0 Hz
The frequency to switch off the fixed speed pumps in cascade relay- mode can be set by
this parameter.
S
S
S
S
G
G
G
S
S