Heating baseboard system 2 is not getting water.

Notanusername

Issue: Third floor unit has two baseboard systems. Oil furnace

-System A heats properly

System B is cold on touch, one can hear water trying to enter the pipe but it sounds as if it falls short as it it about to enter System B.

Not picture a small outlet valve on the bottom right side of the system.

System B has no bleed valve to drain air. I went down to the system in the basement and purged water for about 15 mins, I opened the city air pressure inlet just a bit.

I believe System B as the water enters System A first and a few seconds after one can hear water attempting to enter system B. System B I believe is the highest point and the only real fix would be adding a bleed valve into System B or purge the system for longer?

At least System A is not doing that 'clank' sound anymore when it starts heating.

Grallert

Third picture top left. Is that the return? A split return from A and B?

BDR529

Should be popping that relief anytime

Jamie Hall

https://forum.heatinghelp.com/discussion/comment/1828219#Comment_1828219

Unless the gauge is wonky…

Purging the system longer won't do much good unless you can purge the two zones completely separately.

BDR529

I can get a good look at a T-bone by sticking my head up a cows ——- but i'd rather take the butchers word for it.

Notanusername

https://forum.heatinghelp.com/discussion/comment/1828205#Comment_1828205

I don't really know how to answer your question but I did followed the pipes and what I think would be the return valve for the system A and B seems to connect to the heating system for the first unit? What appears to be the exit valve for the second baseboard system is warm to touch and it loops the basement then in the section that goes up it is lukewarm in comparison to the pipe that goes to system A that I can only touch for a second or two. @Grallert

I added some lines of what appears to be the return valve.

@Jamie Hall So the next step should be to figure out which pipes belong to which system? I somehow was under the impression that they just simply would fork somewhere but they would merge back again at some other point.

Jamie Hall

"So the next step should be to figure out which pipes belong to which system? I somehow was under the impression that they just simply would fork somewhere but they would merge back again at some other point."

A quite correct impression. However, if they do without any control, when you try to purge the system of air the water will quite cheerfully take the easier of the two paths — and the other side (the side not heating) won't get much if any flow at all. Hopefully you can find where they branch or come back together, and discover a valve on each branch so you can go after first one, and then the other.

Grallert

Top left corner were there is a, what looks like a 1" propress tee. That looks like the return? if so those branches should be isolated. That way each loop can be purged of air. Am I seeing that correctly?