Glycol: Pg=2.0, I=0.5, F=-0.555+0.0420*(SetP-Tout)+"GTC" Reset I-term
Glycol: Pg=2.0, I=0.5, F=-0.555+0.0400*(SetP-Tout)+"GTC" GTC = (glycol_supply-glycol_return-0.330)/2