The contractor will provide all materials, labor, and equipment for preventive maintenance on two Carrier Chillers at the U.S. Embassy Canberra to ensure operational condition. Services include replacing expendable parts, maintaining a supply of common parts and refrigerants on site, and adhering to safety and OEM standards. Performance of services is required at the U.S. Embassy Canberra. No specific budget amount or non-bid timelines are mentioned in the description.