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Farm Building and Infrastructure
Buildings & Infrastructure
Radiators not heating up
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<blockquote data-quote="Wisconsonian" data-source="post: 9113709" data-attributes="member: 150618"><p>If the pump is quiet, then it shouldn't have air and should produce it's full pressure, which should be enough to move a little air through the system to the bleeders. The pump should hum or whirr when running and continue to make noise for second after it's shut off if it's turning, or you can tell by the system if it's circulating to radiators far away horizontally and not just ones higher vertically. </p><p></p><p>As long as there's a pressure relief valve, and you don't defeat it, it should be safe to add pressure. The pressure makes the bubbles smaller, and reduces cavitation in the pump, it doesn't add to the pump circulating pressure, so if the pump is air free already, it's less needed to increase the pressure. </p><p></p><p>Those are general ideas to deal with air, which is overwhelmingly the problem in cases like this. There's no way for anybody not there to know if a pipe or valve is blocked, that would be unusual if the system is closed and has not had water added consistently.</p></blockquote><p></p>
[QUOTE="Wisconsonian, post: 9113709, member: 150618"] If the pump is quiet, then it shouldn't have air and should produce it's full pressure, which should be enough to move a little air through the system to the bleeders. The pump should hum or whirr when running and continue to make noise for second after it's shut off if it's turning, or you can tell by the system if it's circulating to radiators far away horizontally and not just ones higher vertically. As long as there's a pressure relief valve, and you don't defeat it, it should be safe to add pressure. The pressure makes the bubbles smaller, and reduces cavitation in the pump, it doesn't add to the pump circulating pressure, so if the pump is air free already, it's less needed to increase the pressure. Those are general ideas to deal with air, which is overwhelmingly the problem in cases like this. There's no way for anybody not there to know if a pipe or valve is blocked, that would be unusual if the system is closed and has not had water added consistently. [/QUOTE]
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Radiators not heating up
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