| Wow, you guys are throwing a lot of stuff at me - good stuff.
Okay, here is the data. When system is cold, the pressure on the burner gauge is around 10 psi. When hot (around 180 F), it is a little less than 20 psi.
The expansion tank is on the outlet main line just above the burner - just as you guys guessed. The circulator is at the return line going into the bottom of the burner. I do not know if I have an air removal device as gilmorrie has mentioned. All I can see is a Hy-vent mounted on top of the burner - it is parallel (coming out of the burner) to the main pipe which has the expansion tank installed.
I have recently replaced the circulator pump and the aquastat. They are both exactly the same models as the previous ones.
Increasing cold water pressure is probably a good idea to try but I am a little nervous about leaks this may introduce.
I moved into this house 5 years ago.It always has air in the pipe. I thought I could purge the air out so I read a lot on this site on how to get air out. I think I am doing the right thing but still there is air!
As xiphias has said, the 2 approaches he mentioned will require a lot of work in my setting. I'd ask if adding an air scoop will help in my current configuration.
Thanks again!
Long  |