I was also going to flush the boilers, but now that I think about it, I don't know how I'm even going to fill the system. They have check valves on their supply lines and there is a Caleffi 280 mixing valve downstream on the supply header. The system auto fill valve is on the return near the tank. The air scoop and vent is also out of the loop.
Will the Caleffi prevent all flow downstream of the recirc line when the temp is cold? If so, will I have to add some drain valves and an auto fill line?
This sucks. I hadn't thought of this beofer.
Will the Caleffi prevent all flow downstream of the recirc line when the temp is cold? If so, will I have to add some drain valves and an auto fill line?
This sucks. I hadn't thought of this beofer.