After completing satisfactory training, may be periodically assigned the responsibility of closing the unit, which includes shut down of the water system and Ozone if applicable, final review of dialysis machine shut down for the day, remaining on duty until the last patient has left CFKC property, and securing the building. About CFKC: Since opening its doors in Orlando in 1972 as one of the first three dialysis units in the state of Florida, Central Florida Kidney Centers (CFKC) has become Central Florida's local not-for-profit dialysis healthcare option.