I'm in the process to remodel my pool that include re-plastering, new tiles, and new plumbing.
Since my system has solar panels, i would like to get your comments on my existing setup. I have some doubts about it and its correctness.
My solar uses FAFCO 11 panels (Because of the roof structure, i got one section of 4 and another of 7) that are all plumbed with 2" black pipe on the roof and white on the remaining portion (PVC or ABS not sure) . I have a G35 Goldline controller that has a switch and thermostat dial to adjust temperature. My current setup has the pipe that is coming from the filter has a Tee, and one split goes to the roof (cold) for the panels. The other end of the Tee, goes to a 3 way motorized Jandy valve. That valve selects between this line and the output (hot) from the solar. The output of that valve runs to my gas heater, and from the heater to a SWG (Pentair IC-40), then it goes to the pool return lines. There are no check valves in those lines, expect at the output of the DE filter.
My question is that I have seen many diagrams with solar, and all are calling for the 3 way valve to be placed as the selector between where to divert the cold water into the solar or bypass to the pool, and have a Tee on the solar output with a check valve.
In my setup (the opposite), it seems that on any pump startup, it would require the pump to fill the line of solar panels even if the solar is switched off by the goldline controller. It seems that it will always be under pressure.
Now that I remodel it, Should I change that to be like all of the diagrams are calling for?
What are the benefits? and is it critical?
40' x 20' gunite pool Pentair SMBW4060, ultra flow 1.5HP 1.47SF, IC-40 SWG, 11 FAFCO solar.