I got the hangers and special nails for the center joists and got those mounted:
put down some plywood and got the tank on the stand.
Here is a pic of the intake portion of the closed loop completed:
Here I've started the framing for the workbench behind the tank with the closed loop pump roughly in place:
I've started the filling of the tank with R/O DI. One thing that I'm not happy with is that the DI cartridge is already 80% exhausted and the tank is only 25% full so far.
The RO unit is a 300 GPD from BRS. The RO unit itself is giving an output value of between 2 and 5 TDS.
I'm stalled a bit for setting up the sump at this point because I don't have a setup finalized for the sump return plumbing. I could set up two pumps and control the bidirectional flow pattern with my Profilux, but I've been in contact with Reeflo and they tell me that the constant on/off cycles would shorten the life of the capacitors and do no damage to the motor itself.
They have also told me that if my valving setup involves a total shut off of the output for any length of time that it would also not damage the pump. It would just result in a transfer of heat to the water trapped in the impeller chamber.
Another option that I came up with is that instead of the pump turning off for the rest cycle, the water could just be diverted back into the sump tank for the hour. That way the pump would run continuously and the sump would get a bit of a "super rinse" cycle.
Perhaps an existing OM unit could be modified with some timers instead of inventing a new setup.
The cycle would then be:
5 hours through output #1
1 hour sump recirculation
5 hours through output #2
1 hour sump recirculation
repeat.
Maybe that's something I can do myself. I haven't had time to sit down and think it through.