Hello

I am head over heals in the design of a water treatment plant (Conceptual design), Once the P&ID is approved, which it is, I am finding a hard time elaborating a document describing the P&ID, for those who doesn't understand it, as well as document to explain how the Instruments actually works and respond one to the other. I am new to this, So if you could help in any way, I will be really grateful. Small Bio