Turns out that it was the temperature of the return water was high enough to stop the recirculation. I think it's 100F. The Navien is smart enough to stop recirculation when it recognises hot water has made the entire loop. The setup is correct and the only two settings you need are P.12 for...
Hey proxybox
I’ve just installed a HotButton on my Navien and i’m having the same issue with the cycle not completing when the button is activated (I used a fortrezz MIMOlite moment switch instead). I set P.16 in the menu to the correct return pipe length and I changed P.12 from a 5 min cycle...
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