I was wondering how big is too big? So I wanted to buy an oversized Pentair IC-60 for my 13,000 gallon pool. I would run it at a low output to increase its 10,000 hour lifespan. But then I read this from Chemgeek:
There is one side effect to oversizing a unit which is that when it is on it is outputting higher FC levels (out of the returns) and this would be exacerbated at lower flow rates. The IC60 at 0.56 ppm FC per hour would be 3.4 ppm FC incremental out of the returns in an 18,000 gallon pool if the turnover time were 6 hours and in a smaller 7500 gallon pool it would be 1.3 ppm FC per hour so with 6 hour turnover that's 8.1 ppm FC. So there are some practical limits to oversizing especially in smaller pools and longer turnover rates. Since the IC40 is still fairly efficient, it may be a more practical choice in smaller pools with 30% lower FC levels coming out of the returns. (Economics of Saltwater Chlorine Generators)
Is he saying that the IC60 will over-chlorinated a small pool? But aren't there variable output settings on the IC60 (2%,4%,6%, 20%, etc) that can account for that?
There is one side effect to oversizing a unit which is that when it is on it is outputting higher FC levels (out of the returns) and this would be exacerbated at lower flow rates. The IC60 at 0.56 ppm FC per hour would be 3.4 ppm FC incremental out of the returns in an 18,000 gallon pool if the turnover time were 6 hours and in a smaller 7500 gallon pool it would be 1.3 ppm FC per hour so with 6 hour turnover that's 8.1 ppm FC. So there are some practical limits to oversizing especially in smaller pools and longer turnover rates. Since the IC40 is still fairly efficient, it may be a more practical choice in smaller pools with 30% lower FC levels coming out of the returns. (Economics of Saltwater Chlorine Generators)
Is he saying that the IC60 will over-chlorinated a small pool? But aren't there variable output settings on the IC60 (2%,4%,6%, 20%, etc) that can account for that?