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  1. E

    Needed: HW circulator with RS-485/ Backwash Valves Replacement

    So we successfully built a microcontroller system to run the Pentair i2 pumps for the heat exchanger on the swim spa. Here But we need a higher input temp than the Pentairs can handle. Anyone here have experience with a steel/cast iron circulator pump of another ilk that has RS-485 control? I...
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    just little old me

    I'm an engineer based Inside The Beltway. I'm working on several projects for a client&friend on Bainbridge Island, WA. This includes a spa, a 20,000 gal. koi pond, and many other non-H2O projects.
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    Pentair VS pump Questions

    I am looking at the IntelliFlo VSF 011056 pumps but have a question. We plan to control the pump speed via their RS-485 link. They are TEFC (Totally Enclosed Fan Cooled) motors. When you run the pumps at lower speeds, their cooling fan also runs slower. Is there ever an issue with them...
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    Any port in a storm, perhaps?

    Hello: I'm an engineer working on a client-friend's new 2000 gal. tub spa. We are adding an external ground source heat pump feed to heat the spa, vs. the current 4KW resistive heater. There will be a titanium heat exchanger (E.J Bowman) that with a 50 gpm flow rate, will have up to 20KW...
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