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RVS-DX, Digital Soft Starter Instruction Manual—04/01/04
7-5
Start Up Procedure With Pump Control
Starting Curve
1. Adjust main parameters as necessary (FLA, FLC, etc).
2. Set Starting Curve, Acceleration Time, Current Limit, and Initial Voltage to their default values
(curve 0, 10 sec., 400% and 30% respectively).
3. Start the pump while watching the pressure gauge as the pump starts and look for overshooting
(“Pressure Surge”) of the gauge needle
above the target pressure. In case of over
pressure, choose a peak torque reduction
curve (Pump Control curve 1!).
4. Set Start Curve 1!, increase Acceleration
Time to 15 sec. and reduce Current Limit
to 350%. Start the pump and watch the
pressure gauge while the pump starts.
5. In most cases, overshooting is reduced, if
the overshoot persists, increase Acceleration time to 25 sec. (confirm with motor manufacturer)
and try again.
6. If the overpressure persists, increase Starting Curve setting to 2!, or 3!, if necessary. Each
increase in Starting Curve setting will reduce the Peak Torque, thus, reducing the overpressure
and preventing the “Pressure Surge” during start.
7. To increase starting time above these maximums, employ “Extended Parameters Settings” (page
5-7).
Stopping Curve
1. Adjust main parameters as necessary (FLA, FLC, etc.)
2. Set Stop Curve and Deceleration Time, to their default values (curve 0, 10 sec., respectively).
3. Stop the pump, watching the pressure gauge and check valve as the pump stops. Look for
overshooting (“Water Hammer”) of the gauge
(abruptly stops the pump and the motor).
4. Select Stop Curve 1, increase Deceleration time
to 15 seconds. Stop the pump and watch the
pressure gauge and the rate of closing of the
check valve as the pump stops. Abrupt stopping
of the pump and motor will cause a loud audible
noise emitted from the check valve.
5. In most cases, “Water Hammer” is reduced. If the
“Water Hammer” persists, increase the time to 25
seconds (confirm with motor manufacturer) and try again.
6. If the “Water Hammer” persists, increase Stop Curve setting to 2!, or 3!. Each increase in stop
curve will reduce the abrupt stop of the pump, thus, preventing the “Water Hammer”
phenomenon.
Voltage
Pump control during