This is old and used so there are blemishes and imperfections. Overall it is in good readable condition. See all photos for contents and condition. The 1979 Trane HVAC CVHA-IN-1 Operation Technical Manual is a comprehensive guide specific to the operation and maintenance of the Centravac chiller. Published by The Trane Company, this manual is presented in English and is illustrated for visual clarity. This technical manual is a valuable resource for adult education and further education in mechanical engineering, focusing on the technical aspects of the liquid chiller system. With a publication year of 1979, this manual provides a detailed insight into the operation of the Chiller Centravac system, making it a vital tool for professionals in the HVAC industry.