Xylem IM098 AQUAVAR Model 56 Controller - Manual (Page 35)

Operator Custom Features and Displays
Ramp Hysteresis Level Where the fast
ramp changes to the slow ramp. Possible
setting: between 0% – 100% of the window.
Fast Acceleration Time Time setting at
Ramp 1, 2, 3, or 4 will influence the control of the
pump and MUST NOT BE CHANGED for
normal operation. Possible setting for each
ramp 0,05 – 1000 sec. Excessively fast running
time may overload the inverter. Excessively
slow running up time may cause a break down
of the outgoing pressure.
Fast Deceleration Time Excessively fast
running down time tends to cause oscillation
or hunting or can cause an error
(OVERVOLTAGE) during slow down of the
pump. Excessively slow running down time
tends to generate over pressure.
Slow Acceleration Time Too slow of a
running up time during variation of demand can
cause the outgoing pressure to break. Too
fast of a running up time may lead to over
oscillation and/or overload of the inverter.
Slow Deceleration Time Too fast a setting leads
to oscillation. Too slow a setting delays switching
off too much.
Ramp Window
30
HYSTERISIS
80%
ACCEL. HIGH
4 SEC.
DECEL. HIGH
4 SEC.
ACCEL. LOW
70 SEC.
DECEL. LOW
70 SEC.
PRESSURE
R1
R3 R4
R1
R3
R2
R4
R3
R4
SET HYSTERESIS %
SET HYSTERESIS %
100%
SET RATED
PRESSURE
WINDOW
SETTING IN % OF
RATED PRESSURE
R1: SPEED RAMP FAST INCREASE
R2: SPEED RAMP FAST DECREASE
R3: SPEED RAMP SLOW INCREASE
R4: SPEED RAMP SLOW DECREASE
Diagram 10