"Speedy Jim" wrote in message
t...
Max wrote:

You can see a picture of the system here....I'll post to the other
group when I get some free time.

http://www.advantechcny.com/zones.jpg

Thanks


Close the ball valve above the circulator
for the zone which is overheating even
though the circ isn't running. If that
stops the zone heating, then you know
hot water is bypassing (running thru)
the circ.

I'm not seeing flow checks in the system and the circulators he noted, don't
have integral flow checks