The City is seeking firms to provide routine preventive maintenance and repair services for approximately 50 Variable Frequency Drives (VFDs), ranging from 208 volts to 460 volts, located at various City facilities, including the Airport.  Brand names include ABB, Danfoss, Mitsubishi, Schneider Electric, and Yaskawa.  VFDs will be checked as needed for a full service of the VFD (cleaning, replacement parts, etc.), and involve inspection, testing, and reporting on each VFD’s condition.  The City uses VFDs in various applications involving pumps and fans for HVAC systems to achieve energy savings.