I just finished up re-piping an area of the baseboard heat in a bathroom. I got the zone drained just fine to make the changes, but now that I've got it all back together... I'm having issues getting heat to that zone. I get some heat... but not quickly and not as hot as the other zones that were not worked on. FYI... the zone I worked on was to the top floor of a 2-story house.
After researching, I'm pretty sure that my problem is air in the pipes that I need to purge. However, I can't figure out how to do it with the configuration of pipes and my boiler. I'm hoping someone here can point me in the right direction. Also... I do not have bleeder valves on any of the slant-fin baseboard radiators... so I cannot bleed the system that way.
I've taken some pics and posted them here: pic 1
, pic 2
. It's a 4-zone system with a weil-mclain oil boiler. In pic 1, you can see the feed pipe coming into the system (yellow valve) and going down to the back-flow preventer and expansion tank. You can also see the 4 zones. There's also what I believe is an auto-air vent (silver, next to the circulator on top of the boiler).
In pic 2, you can see everything again from a different angle, as well as the boiler drain at the bottom right.
From what I've been reading from other posts... I think what I need to do is run a hose from the boiler drain, set the valve from "auto" to "open" to for the zone in question, open the boiler drain, and let it run out for a while? Am I missing something? Would the auto-air vent eventually let the air out of the system? Thanks for the help!