HGRH Dehum, Digital Scrolls, ModGas Heating on some Aaon RTUs

Looking at a 70, 50, & 40 ton Aaon RN Series RTUs

**correction: the fixed HGRH valve on the 50 ton is a 3 way, not a 2 way. it acts similarly to a changeover valve (reversing valve) except its a 3 way instead of a 4 way.

This is a second-shot take at Hot Gas Reheat Dehumidification and Digital Scrolls with a little bit on ModGas Heating and PID loops and capacity control