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Posted by Harold hydronicnetwork.net on January 19, 2004 at 08:31:19:
In Reply to: Re: VIBRATION SOURCE posted by ROB on January 19, 2004 at 08:14:52:
: Sorry about the incorrect term, I am an auto tech by trade. Are you saying to increase the psi to 20 and that will take care of the problem or to increase it to 20 till it goes away hopefully and then reduce it back to a lower setting?
>>> The idea is the same as the pressurized radiator cap; as the pressure increases, the boiling point increases, so as long as the pressure is high enough to stop the boiling, the sizzling stops. If you lower the pressure, the boiling point drops, so the sizzling resumes. So leave the pressure up if you can maintain it and it doesn't cause the relief valve on the boiler to leak sometimes.
Did this problem occur as a result of opening the system to replace the pressure reducer in your opinion.
>>>No
Is this an unsafe condition?
>>> Sizzling is a form of water hammer and can increase the probability of damage.
I also noticed that the repair person left the valve to the pressure reducer open. Should this be closed I assume.
>>> When the manufacturer tells you in the reference URL I posted to close it - CLOSE IT.
I am sorry about all the ?? but when I talked to the guy who did the work he told me that he had been on the job about a year and had no schooling.....Scary huh??
>>> Oh, yes.
Thank you for your rapid response. If you prefer you can call me at 1-800-966-1580.
: Thank you very much.
: Rob
>>> You are welcome.