Quote Originally Posted by tphaggerty
I wonder how they do that, maybe one flow switch on the supply side and one on the return side of the solar (when supply is off, low speed. When supply is on/return off, high speed. When supply on/return on, low speed again maybe ?)
Somehow they use the flow across the bypass to determine when the panels are full. I am in the reference-checking phase right now. The other thing they bidded on and I am resisting is to switch from my booster run Polaris 280 to something that can run off of the Ikeric at its own flow setting. This might save me an additional $500/year, but I am investigating....