Vogt TUBE-ICE P-118F, Service Manual

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P118F Service Manual
OPTIONS AND ACCESSORIES
1/6/09
10-2
Reduced Voltage (Soft-Start) Compressor Motor Starters
Several Vogt Tube-Ice machine models are available from the factory with a reduced voltage “soft” compressor motor
starter. These units reduce inrush current to approximately 200% of rated full load amps, as compared to 600% for
across the line start. The units are also available for after market or retrofit installation. The soft starters include a
NEMA 12 (water tight) enclosure, and should be mounted near the compressor. Compressor motor soft starters are
available for the following models.
Model Hp Volts Hz Vogt Part Number Model Hp Volts Hz Vogt Part Number
P118F 12 230 60 12A-7800S050000 P18FXT 30 230 60 12A-7800S090000
P118F 12 460 60 12A-7800S060000 P18FXT 30 460 60 12A-7800S100000
P118F 15 200 50 12A-7800S070000 P18FXT 35 200 50 12A-7800S110000
P118F 15 380 50 12A-7800S080000 P18FXT 35 380 50 12A-7800S120000
Initial Torque Adjustment
The initial Torque adjustment is factory preset for maximum torque (maximum starting voltage).
1. Rotate the START TIME adjustment fully clockwise (to 100) so that the longest starting time is obtained.
2. Rotate the INITIAL TORQUE adjustment to midrange on the dial (50), to lower the starting torque.
3. Start the motor. If more or less torque is required to break the load free, turn off the power, rotate the INITIAL
TORQUE adjustment in the appropriate direction until the load just begins to move when power is first applied.
Start Time Adjustment
The START TIME adjustment range is 1/2 to 30 seconds for a motor voltage from 10% to 100% of line voltage. The
higher the value of the INITIAL TORQUE, the shorter the duration of the overall time period. In most applications it is
desirable to start the motor as quickly as possible without causing unnecessarily high inrush currents.
1. During the INITIAL TORQUE adjustment process, the START TIME was adjusted for the longest start possible. If
a shorter time is desired, rotate the adjustment toward 0 (counterclockwise).
2. Start the motor and determine if the soft start is acceptable. If not, continue to rotate the start time adjustment until an
acceptable start is obtained.
Note: The soft starter should be adjusted to bring the compressor up to full speed in five seconds. Any longer than this
will not obtain a further reduction in starting current.