Xylem HVS 1.1 - 3.4 - Manual (Page 22)

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b) Learning a complete system curve = reference curve 0 [Default]
(no external programming device required)
1.) Stop the pump while pressing the button
▼ on the HYDROVAR SENSORLESS.
2.) Press the
▲ and ▼ buttons together for 5sec, the colour of the LED
changes from green to orange. The pump is now ready to learn.
3.) Set now the first system point at flow=0. You can change the speed of the pump
by using the button ▲ (higher frequency) or ▼ (lower frequency).
Check the difference pressure on an important point of the system to set the required
frequency.
If external programming device is connected with HYDROVAR SENSORLESS, you can see
the power and the frequency on the display.
4.) To save the learned point press the
▲ and ▼ buttons together, until the
LED will begin to start fast flashing.
5.) Increase now the flow of the pump up to 20-30% of the maximum flow.
Increase also the frequency by using the button ▲ (higher frequency) or ▼ (lower
frequency) to reach the required value.
6.) To save this point press the
▲ and ▼ buttons together (-> 4.)
Learn now the next points up to the maximum flow.
7.) To save the last system point and to end the learning mode you have to press the
▲ and
▼ button together after setting the last frequency, until the pump stops automatically
and the LED starts shining green.
Now the required system curve is stored.
8.) If “Autostart” function is disabled start the automatic mode by pressing button
▲. The
Hydrovar sensorless increases now the speed till it reaches the right point depending
on the system curve.
With the programming device you are now able to change ramps and windows for a better
controlling.