Over the past year I had an IntelliChem and acid tank installed. The installer is a certified Pentair installer, and has a very good reputation. However, after seeing him do the install and having some issues along the way, I have a strong feeling that (prior to my install) he's most likely never done this install before. He worked out all the kinks during the pool season and the unit eventually operated correctly. Once it did it was really a pleasure to have (much less maintenance on my part, which is good with my work schedule).
My current problem is that he closed the pool and winterized everything according to what he thought should be done, but I know that he didn't do it right. For example, he at first didn't remove the ORP and pH sensors from the IntelliChem's flow cell, and he didn't drain the flow cell (instead he added some kind of pool antifreeze in there). I looked at the IntelliChem's manual and saw that it says to definitely drain the flow cell, and it's related plumbing, and to remove and store the sensors.
He also didn't drain the acid tank, which I wasn't sure was correct. Per Pentair's recommendation, I was using a 50/50 water:acid mix in there, and about 1/3 of the tank is still full. I questioned him about this and he's saying that I shouldn't worry about draining the tank because (according to him) the water+acid mix won't freeze - is that true?
Does anyone have a IntelliChem and/or acid tank that is winterized? If yes, I'd truly appreciate it if you'd let me know what is done to winterize them.
As far as the flow cell goes, I figured out how to remove it so that I could drain it, but there's a U-shaped tube inside of the flow cell that I'm not sure how to drain (or if I need to). Also, since the ORP and pH sensors are removed now, there are openings where they used to be screwed into, meaning that water will get in over the winter and freeze. Any thoughts on what to do to seal those openings without causing any damage?
Also, what about the electrodes that run from the IntelliChem and connect to the top of the pH and ORP sensors? Are those okay to just leave disconnected and outdoors during the winter?
Thanks so much for any info!