I'm trying to set up an IC code to regulate water temperature/pressure.


My set up:
I have one pipe for hot water going into a heat exchanger, and another one for cold water going into another heat exchanger.

Both pipes have digital valves and liquid analyzers.

What I'm asking for help on:
I'm needing a code to control the water in the cold pipe on the analyzer side of the valve to open the valve when the water is too hot, or to open when the pressure in the cold pipe is not at the right amount; and then the same basic principle for the hot pipe.

Tried for quite awhile now to write an IC code to do this and I'm having no luck.