Other than the single backwash vs double backwash, dF2b, are there any differences that stand out to you? C=24.0 would be more for a 1 cubic ft system, and that is the one that stands out to me.
OK, RT=12:00 does strike me as odd also. Maybe you mis-copied that one?
Even with water in it, they will startle you if you are near. I hope the units will not be near your bedroom.
The valves/tanks are in the garage, but my master bathroom does share a wall with the garage. Thankfully the tanks are on the far wall of the garage from the bathroom. There is straight line of sight/sound from that shared garage/bathroom wall to the bedroom, but hopefully will be okay. Worst case I figure I could rig some sort of muffling insulation cover for them. Just out of curiosity - day late, dollar short, but is noise consistent across all valves, or are Clacks quieter?
Regarding settings - I am sure these have some stock settings in them so by no means did I expect everything to be set how I need it out of the gate.
Here I agree dF2b is what I want based on my reading. Everything from your list looks good, except there are some things I want to understand a bit more:
-how is the RS=cr reserve calculated? Is this absolutely a better bet than setting a percentage or set gallon amount reserve? Seems like a neat idea to adapt to changing usage. I certainly do not want it left at RS=rc , RC=0 That would lead to up to a full day without soft water if I am correct.
-Backwash, rapid rinse (isnt slow rinse a thing too?), etc all I understand to be values that have been determined to be effective but reasonably short to conserve water. Obviously want the gunk and salt water out of the resin before it goes into service again. Presume your settings are great for that
-Salt efficiency - here I understand all about salt efficiency, resin, etc. What I seem to be having a major brain disconnect on is where I read something that connected "x lbs per cuft" and the expected regenerated resin total from that to the settings on the valve in capacity, brine draw, brine fill, etc. I know you don't set the capacity to the total capacity of the unit, so in this case a 1.5 cuft is not a 48k softener in the settings. Am I correct in assuming that the amount of regeneration you want each cycle is what you set the capacity to be, and why you have C=36? Or is it the brine draw that matters - 60 min x .25 gpm = 15 gal brine? I am trying to track down what that equates to in dissolved NaCl (or in my case KCl) and how to adjust these settings for different salt efficiencies, namely what I would do for either 4lb/cuft or 6lb/cuft if I chose to go that route.
-Brine Fill - How is the gpm of this rated? I presume this needs to equal how much is drawn out for brine, or else either the brine tank will run dry or eventually overflow.
-Time initially struck me as midnight, which clearly is not it. Good catch. Would want to backwash this at a different time than the softener since they are likely going to share a drain line, and make sure that the times involved cannot overrun each other. Better to backwash before or after a softener regen if they both happen the same night?
-DO=3 sounds way too short. I figure at least every week, maybe even longer. 14 days? 21 days? You mentioned 7 originally. Any standard to this? Or is it all based on water usage up to a point?