Hello - Bought a home with an outdoor Maxim pellet stove last spring. The system has a Taco valve with the numbers 561-5 stamped in the brass. Everything worked fine last year - this year I had the furnace replaced and noticed that the furnace installers cut the wire to this Taco valve and left it disconnected - but the boiler still seems to heat the house... Trying to understand what this valve is for and if it should be wired back up (assume yes - just trying to understand this function before I call the HVAC installers). Googling the numbers I keep seeing "normally closed" would this mean that in normal operation no water should flow to the heat exchanger? If thats the case... why do I still get heat?
Feeling all 3 pipes from this valve and all seem to be hot?
Below is a picture of the valve under the house. The unit is maybe 15 feet from the heat exchanger and the boiler is maybe 150 feet away outdoors.
![[Hearth.com] Bypass valve function question](https://www.hearth.com/talk/data/attachments/307/307270-ccea59425dc445d113eed492aa1c5a8e.jpg?hash=6l7iMdK_yu "[Hearth.com] Bypass valve function question")
Feeling all 3 pipes from this valve and all seem to be hot?
Below is a picture of the valve under the house. The unit is maybe 15 feet from the heat exchanger and the boiler is maybe 150 feet away outdoors.
