The United States Embassy in Lusaka, Zambia requires professional services for preventive maintenance of two 16-year-old York Rotary Screw Air Cooled Chillers. The contractor must provide all labor, tools, and materials, including expendable parts and safety equipment, with work performed on-site at the embassy. A typewritten maintenance report must be submitted to the Contracting Officer's Representative within five business days of each visit. No budget amount or submission timeline is specified in the description. Performance of services will take place at the U.S. Embassy in Lusaka, Zambia.