Xylem HV 1.1 - 1.2 - Manual (Page 44)

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13.6 Submenu Controller
Submenu
Controller
To enter this menu you have to press the Ð key, to
leave the menu, press the Î key longer than 3 sec.
13.6.1 Window - %
Window
5 %
This value indicates the max. variation of the outgoing
pressure (ref. Ramp window in chapter 13.6.6).
Possible setting: between 0% - 100% of required pressure.
Press
Î on the controller to change to
13.6.2 Ramp Hysteresis
Hysteresis
80%
Level, where the fast ramp changes to the slow
ramp within the window.
Possible setting: between 0%..100% of the window
Press
Î on the controller to change to
13.6.3 Fast acceleration time
Time setting at Ramp 1, 2, 3, or 4 will influence the control of the pump
and SHOULD NOT BE CHANGED at normal operation. Possible setting for
each ramp 0,05 - 1000 sec.
Accel. High
4 Sec
Excessively fast running up time may overload the
inverter.
Excessively slow running up time may cause a break down of the outgoing pressure.
Press Î on the controller to change to
13.6.4 Fast deceleration time
Decel. High
4 Sec
Excessively fast running down time tends to cause
oscillation or hunting or can cause an error
(OVERVOLTAGE) during pump down of the pump.
Excessively slow running down time tends to generate over pressure.
Press Î on the controller to change to
13.6.5 Slow acceleration time