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Posted by kai klemm on August 12, 2009 at 18:54:23:
I just installed a utica tri fire boiler. When i turn on the boiler it will go to 165 degrees and then the pressure rises suddenly and the relief valve blows. I turn off the boiler and the temperature starts to rise to 240 degree and this is even if the boier is turned off at 165. Even if i reduce the pressure to zero at a lower temperature, the pressure stills rises and is out ouf control. The systerm has been bled and the expansion tank was pressurized to 12 poinds.
What is going on?