Girls and David; Lets snot fight over internet info. I have asked IC Chiller questions that utter chiller comp should know and they have dismissed me. IC talks to wa straight. I have given them my qual IF ications and experiences wit chillers. They shot straight wit me. I am not affiliated wit sem and or anyone else. I have worked on, replaced, sold, sized up, invented, ect. Chillers, cooling towers, condensate induced equipment, pumps, ice storage systems, insulation on piping and equipment, air seperators and not to be fore gotten,, chemical feed systems. Not to draw unwanted attention 2 dees companies, but they have not 1 time mentioned chemical induction. This is a closed system but with brazing & soldering of copper, dissimaler metals,, need a dielectric union. These systems get contaminated and need to be emptied and refilled or else. Pumping system will go bad, all equipment will turn green like de radideator system. Den da air seperator. Air lock will lock up de pumping system. Uh, no mention of dis stuff to ya. Moe $$ two doo it right or else, moe $$$$ down da street. I am sure dees peoples no what day bee talkin about, but take it frum a chilla mechanic???