Xylem HV 1.1 - 1.2 - Manual (Page 38)

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Enter the required value by pressing the Ï and Ð button ACTUAL VALUE INCREASE
0,15 bar
After changing of the value, you have to confirm with the Î button.
Then you will get the message “SAVE PARAMETER” for a short time, when the new setting
is saved!
Press the Î button to change to
ACTUAL VALUE DECREASE
0,15 bar
ACTUAL PRESSURE DECREASE (= Fall value):
This value determines amount of pressure drop you will allow before the next pump starts.
(see application example on previous page)
Enter the required value by pressing the Ï and Ð button
ACTUAL VALUE DECREASE
0,15 bar
After changing of the value, you have to confirm with the Î button.
Then you will get the message “SAVE PARAMETER” for a short time, when the new setting
is saved!
Press the Î button to change to
ENABLE SEQ. CONTROL
48 Hz
ENABLE SEQUENCE CONTROL:
The follow-up pump only starts, when the start-value is reached (see chapter 13.7.2) and
the lead pump has reached the programmed release-frequency. (Adjustable from 0.0 Hz to
70 Hz). Normally this start frequency is set 1 to 2Hz lower than the MAX. FREQUENCY (see
chapter 13.5.1)
If you don’t want to start a following pump this value has to be set higher than the MAX.
FREQUENCY. (see application example on previous page)
Enter the required value by pressing the Ï and Ð button
ENABLE SEQ. CONTROL
49 Hz
After changing of the value, you have to confirm with the Î button.
Then you will get the message “SAVE PARAMETER” for a short time, when the new setting
is saved!
Press the Î button to change to
SWITCH INTERVAL
24 HOURS
SWITCH INTERVAL
This time determines the interval of the changeover of the master pump in order to
achieve even operating hours of all pumps in the system. Adjustable between 0 and 250
hours
Enter the required value by pressing the Ï and Ð button
SWITCH INTERVAL
24 HOURS