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Aquasmart 7600 and taco sr504
I have a buderus lagano with an aquasmart on top and I picked up a Taco SR 504. I have a primary secondary set up with two secondary loops run with taco circulators. Be kept has great diagrams for setting this up with no primary ciculator. I'm wondering if anyone has insight on how to control the primary so that it runs whenbeither of the secondaries are on. I kind of got it working last night by connecting the Sr504 tt to the Beckett TT and the zc and zr between the two. Running the main circulator off of C1C2 and the two secondaries off of the Taco. I think it's not quite right though. Any insights?
Excuse the wiring, I'm not making everything neat until I have it right.