CASE STUDIES: CURRENT DIVERTER RING ® (CDR ® ) | CHILLER PUMPS Extending the Life of Energy-Efficient HVAC Equipment A leading plastic injection company planned to install variable frequency drives (VFDs) on their chiller pumps to increase energy ef? ciency and reduce operating costs. These drives are increasingly popular in the HVAC industry because of their ability to economically meet changing load demands, making them ideal for ? uid and a

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