Hi guys, I am using (2) Taco 007 circulators for the 2 zones. Oilman, On the aquastat only the z/r has a black wire to it, no wire to the z/c.
That's the wire from the timer.
Stoker-man, 4 teeth has kept house comfortable but then again it has been in the low to mid 30's. I will increase teeth (fly by seat of my pants) when in 20's.
If it heats on 4 teeth, let it stay there, but you'll have a slower recovery rate for your domestic coil when the cold return water hits the boiler, until you get your bypass piping installed.
The plumber who put my EFM in also did a few others for people and I wonder if they are having problems also. I'll never use him for anything again.
You don't have to be too hard on the guy. If you had copper baseboard and a smaller house, maybe you wouldn't have needed the bypass line.
There is a plumber in Bedford county, PA that my coal guy says is good. If I get him to plumb this right should I get the circulators put on the supply side instead of the return
Supply side pumps seem to eliminate air better than return side. Just use shut-off flange valves on either side of the circ. for possible future replacement.