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Ufh Controller And 3 Port Valve Conundrum
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<blockquote data-quote="ProDave" data-source="post: 300140" data-attributes="member: 6969"><p>That;'s the sort of comments I'm looking for.</p><p></p><p>BUT when a 3 port valve is de energised, it relaxes (by spring) to the "Hot water" position doesn't it?</p><p></p><p>So the UFH controller calling for "hot water" will create a boiler (and pump) demand, and that will flow through the relaxed 3 port valve to the tank.</p><p></p><p>When the tank stat opens, the UFH controller will stop sending the boiler demand and it will turn off.</p><p></p><p>The Zone 7 output is to tell the "system" when heating is demanded as well, to move the 3 port valve to it's mid, or heating position.</p><p></p><p>Or have I completely miss understood how 3 port valves work?</p><p></p><p>I am generating the "water OFF" signal sourced from Zone 7 (it could in fact be any L supply) but that is only relevant when heating is on as well as hot water anyway, so that seemed a logical place to source it.</p></blockquote><p></p>
[QUOTE="ProDave, post: 300140, member: 6969"] That;'s the sort of comments I'm looking for. BUT when a 3 port valve is de energised, it relaxes (by spring) to the "Hot water" position doesn't it? So the UFH controller calling for "hot water" will create a boiler (and pump) demand, and that will flow through the relaxed 3 port valve to the tank. When the tank stat opens, the UFH controller will stop sending the boiler demand and it will turn off. The Zone 7 output is to tell the "system" when heating is demanded as well, to move the 3 port valve to it's mid, or heating position. Or have I completely miss understood how 3 port valves work? I am generating the "water OFF" signal sourced from Zone 7 (it could in fact be any L supply) but that is only relevant when heating is on as well as hot water anyway, so that seemed a logical place to source it. [/QUOTE]
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Ufh Controller And 3 Port Valve Conundrum
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