I just installed a new pressure tank in my hydronic system. It said it
was pre-charged to 12 psi. When refilling the system I think I did a
good job of eliminating the air as there is little noise when the
circulator is running, plus there is a Spirovent installed.
I like to keep the system pressure at between 15 and 20 lbs. but I
noticed the pressure seems to drop back to 0 quite often. Then when I
add water, the pressure seems to rise very quickly. The only thing I
can think of is that I have no air cushion.
I did not check the tank pressure before installing.
What is wrong and what should I do? I'd like not to have to drain
the system again.
Thanks in advance.
Frank