DIY Home Improvement Forum banner

In floor heat...without the heat?

2K views 12 replies 3 participants last post by  beenthere 
#1 ·
Hey I think I have air in my radiant floor system...It is a closed boiler system. When it is running the supply lines get hot but after an hour or so the return lines are still cold...You can hear air in the system. I have a spirovent in it. I just really have no idea how to bleed it. Can someone tell me how? Is there anything I'm sposed to do with that spirovent? Like maybe open it or hit it or something?:whistling2: Please explain it like i'm a 5 year old-I know very little about this.

Thanks
 
#4 ·
I have hydronic heat but I've only installed four or five in my whole life---

There are a few men here who have a lot more knowledge than me----You will get an answer soon enough.

One is on every morning about 5:00----be patient----
 
#7 ·
Post pics of the piping. both at the boiler, and at the radiant manifold. So we can see what your set up is like, and advise from there.
 
#9 ·
I don't see a purge set up on that piping. They may have purged it through the strainer when they originally installed it. An it can be done that way again. Shut off the valve at the boiler. Then shut off the one on the return at the manifold . Remove the strainer plug,(some water will come out). Then screw in a drain valve and connect a garden hose to it. Reopen the valve at the manifold, and the new drain valve, bleed/purge each loop separately, until no more air comes out. Close drain valve and valve at boiler. Leave the new drain valve in the strainer.
 
#11 ·
Third pic, the Y shaped brass piece is the strainer. The strainer basket is inside it.

Just purge by adding water to the system. Antifreeze(glycol)reduces heat transfer, and lowers the efficiency of heating systems.
 
#12 ·
K...gotta get a couple parts to continue. When I drained it I'm sure glycol came out...got me thinking. If I flush it with water and the boiler decides to crap out, I may ruin the whole system if it freezes. With that said, it is normally just water in these systems correct?
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top