Xylem IM253 R0 AquaStart Combination Soft Starters - Manual (Page 12)

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TRIM-POT AND DIP SWITCH SETTINGS (P219 = 0):
Soft Starters are shipped with factory default values. If Trim-Pots and Dip Switches have been changed, it
is advisable to reset to factory default positions prior to a new installation by aligning all trim-pots and dip
switches with the red factory default dots. By default the control type is Voltage Ramp Starting. This control
type is very easy to setup and is the most commonly used starting method. Current Limit Starting is the
second control type and is described below.
Motor Current Trim-Pot Setting - Factory default position is
100% and is marked with a red dot. To protect the motor from
overload, obtain the full load amperage (FLA) off the motor
and soft-starter name plates. Using the following formula,
calculate the percentage of current that the motor will draw
from the soft-starter and set the Motor Current Trim-Pot
accordingly.
– Max A of the soft-starter = 170A
– Max A of the motor = 140A
– Max A of the motor / Max A of the switch
= 140A / 170A = 0.823
– Motor Current Trim-Pot = 82.3%
Figure 8 - Motor Amp Trim-Pot
Thermal Class Dip Switch Setting – Set to factory default of
30 if not specified on the motor name plate. (Note: Factory
default positions are marked with red dots).
Note: If using a submersible motor, set the
thermal overload class to class 10.
Note: These are the minimum settings for a
perfect adaptation between soft starter and motor.
For a complete description of Trim-Pot and Dip Switch
settings refer to Chapter 4 in the SSW07 User’s Guide.
Figure 9 - Thermal Class Dip Switch
Initial Voltage/Current Limit Setting - When operating in Voltage Ramp Starting mode, this setting
configures the initial voltage applied to the motor during start up. When using a submersible motor, set the
initial voltage to 70% to ensure the motor accelerates to half speed in 1 second. For other motor types, set the
voltage so that the motor begins to spin as soon as a start command is given to the soft starter.
Accel Time Setting - When operating in Voltage Ramp Starting mode, this setting controls the time of the
voltage ramp. This is the time from the start of the ramp (initial voltage) to soft starter bypass. This is not the
motor acceleration time. For a faster start, decrease this setting. For a slower start, increase this setting.