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No Hot Water Or Heating Following A System Drain Down
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<blockquote data-quote="Rob_the_rich" data-source="post: 394052" data-attributes="member: 8419"><p>why?</p><p></p><p>the pump needs to be running (with open isolation valves) to transfer the hot water around the system. With the pump isolated, the boiler becomes a kettle and literally boils the water.</p><p></p><p>My earlier suggestion was to re-fit the pump upside-down <strong>temporarily</strong>, the isolation was so that you could do the re-fitting without getting too wet. The reverse flow might cause any air block to clear.</p></blockquote><p></p>
[QUOTE="Rob_the_rich, post: 394052, member: 8419"] why? the pump needs to be running (with open isolation valves) to transfer the hot water around the system. With the pump isolated, the boiler becomes a kettle and literally boils the water. My earlier suggestion was to re-fit the pump upside-down [B]temporarily[/B], the isolation was so that you could do the re-fitting without getting too wet. The reverse flow might cause any air block to clear. [/QUOTE]
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No Hot Water Or Heating Following A System Drain Down
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