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To prevent motor overload during start-up of a hermetically sealed centrifugal refrigeration system, what is true concerning the compressor suction gas variable inlet guide vanes?
A) closed until the motor is connected across the line at full voltage and current drawn is below full load current
B) opened until the motor is connected across the line at full voltage and current drawn is up to full load current
C) closed until the motor is connected across the line at full voltage and current drawn is up to full load current
D) opened until the motor is connected across the line at full voltage and current drawn is below full load current
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