Xylem HVS 1.1 - 3.4 - Manual (Page 28)

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7.4 Submenu Reference Curve
Submenu
Reference Curve
To enter this menu you have to press the Ð button, to
leave the menu, press the Îbutton longer than 3 sec.
7.4.1 Reference Curve
Reference Curve
0 - 7
Change the curve by pressing Ï or Ð
This parameter allows selecting different pre programmed curves.
0... Learned curve with 3 up to 12 system-points
1... previous learned system curve
2... Selection A
3... Selection B
4... Selection C
5... Selection D
6... Selection E
7... Selection F
7.4.2 Power / Frequency
POWER xxx
FREQ xx.x HZ
Check the learned points by using Ï and Ð.
(Learned points 1-12)
This parameter allows only the control of the learned points.
7.4.3 Coefficients A / B / C
These coefficients define the actual reference curve 0-7.
To change the coefficients it is necessary to know a special password.
A changing without knowledge about pump curve and power will produce a
malpractice of the pump.
COEFF A / B / C
x.xxx
Change value using Ï and Ð. Press the Î button
to save and change to next coefficient.
By using reference curve 2...7 it is only necessary to
learn one point at zero flow. You are also able to
change the reference curve while pump is running to
find the best suitable curve.
The different curves depending on the type of pump
and the duty point.