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Posted by AD on November 01, 2005 at 21:25:41:
I did a dumb thing. I purged the air from my expansion tank thinking this was the proper way to bleed the air from my hot water system. The pressure of the system got high, above 30 psig, and blew water past the relief valve. I then connected a hose to the spiket above the circulator pump and opened the valve and let the water run out for about 5 minutes. I turned the boiler switch on again and watched the pressure come up above 25psig, I then opened the valve above the circulator pump again until the pressure fell to about 15 psig. I've been watching it now and the pressure has settled between 18 and 20 psig. Seems to be okay.
My question: do I have to pre load the expansion tank to 12 psig again? Will the system eventually equillibrate and load pressure into the expansion tank?
This system is new and I really had no business touching anything! But the ocean sounds in my baseboards was driving me nuts and I couldn't find the bleeder valves. I'll know better next time not to fool with it.
Thanks in advance.