I have a Home Run system with a Triangle Tube boiler, Indirect water heater. I have 3 zones (2 floors and the basement; basement is not yet connected)
The problem is that it looks like that I need to add something to my system in order I could purge the system from the air from my basement without going to each radiator/baseboard on the floor.
I will appreciate if anybody can take a look at the pictures attached
and advise me on what should I add and exactly at what place inthe system in order to do a purging
Can you please specify where exactly I should have that extra drain cock? At the moment I have two purging valves in my system. One that you already mentioned on the second picture on the return pipe from the Indirect. The other one is on the first picture in the main loop on the left (Return side of the loop). This one probably can be used for purging the air. I probably need something else for purging.
Answering you other question. This boiler has a built in circulator.