A direct energy customer was grappling with a complex issue involving their existing chilled water pumps and Variable Frequency Drives (VFDs). The existing VFD cabinet, a Baldor 150HP, had been retrofitted with two new WEG Enclosed Drive Panels (EDP11) for each pump as part of a service agreement.
Additionally, the VFDs were outdated and needed to be replaced in order to be successfully integrated with the existing Building Automation System (BAS). These VFDs were causing inefficiencies and lacked the advanced features necessary for modern energy solutions.
The challenge was not just to replace the VFDs but to ensure a reliable electrical feed and wiring for the newly installed WEG CFW11 440-460Vac/180-142A VFDs. A flawless integration was necessary to ensure that the system could display proper feedback from the pumps, maintain on and off control, and disable and enable the system through BAS technology.
The task’s complexity was compounded by the need for on-site programming, confirming points and scaling for the new WEG CFW11 VFDs. The customer had concerns about the transition, especially regarding the interface between the new VFDs and the existing BAS network, because of the potential for operational disruptions during the transition.