Got a Nest thermostat and an older hot water boiler. No circuit
board(s)., an Aquastat Three Taco zone valves. Nest is replace one zone.
Have red and white wires, no green. Got power connector. Where do I
attach it? Aquastat or to Zone valve. Thanks
First I Want to understand wiring connections. Have White to W and Red
to R.Buttons pushed down. Not sure I under stand if used buttons should
also be down. Thanks
