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4.7.4.6 Cold Start Limit:
The
Cold Start Limit
setting is a percentage between 50% and 100%, which sets the limit of the
compressor
’s full speed when running under cold start conditions, shown in Figure 157 below. This limit is
active for the duration of the Cold Start Time setting when starting at ambient conditions less than 50
degrees Fahrenheit.
Figure 157: Cold Start Limit
4.7.4.7 Manual Speed:
The
Manual Speed
setting allows the user to manually set the speed of the VFD output to the motor
based on a percentage of the full speed. This speed is active when the Speed Control Source is set to
Manual. The compressor will still load and unload based on the operating settings of the machine, but the
motor will run at a fixed speed rather than modulating the motor speed to achieve pressure control.
Figure 158: Manual Speed