Piping and instrumentation diagrams please inspect my diagrams and assist

I need help with exercise 1 and 3. I uploaded my diagram of exercise 1. I attempted in lucid chart, please help me, I know I messed up on the heat exchange.

PTAC 1432 - drawing diagrams exercise 1 & 2 Fall 2017.doc (27 KB)

PTAC 1432 Lab P&Id Exercise 3 - Fall 17.doc (27 KB)

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