While a complete, single-file official manual is rare, you can find the following resources: Academic Platforms : Sites like Academia.edu
The classic textbook by Donald Q. Kern (D.Q. Kern) is widely considered the "gold standard" for chemical and process engineering. First published in 1950, it provides a rigorous, applied approach to designing industrial heat exchangers, bridging the gap between theoretical heat transfer and practical engineering. Role of the Solution Manual Solution Manual Of Process Heat Transfer By D Q Kern Hitl