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Central Heating & Storage Heaters Forum
(re) wiring a CH system with a heat store tank.
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<blockquote data-quote="ProDave" data-source="post: 265403" data-attributes="member: 6969"><p>Thanks SL</p><p></p><p>I plan to feed the boiler control loop from the HW output of the programmer as that allows me to re use the cables that are already pulled in rather than providing a new feed for it.</p><p></p><p>One thing that has occurred to me is I need to set the programmer for "gravity HW" so if someone programmes it wrong and tries to turn on heating without HW, then the programmer will automatically turn the HW on as well.</p><p></p><p>There's two cylinder stats, but both at the same level low down on the tank. I'm not sure whether to just use one, or connect both of them in parallel for redundancy?</p><p></p><p>The way it was wired before, one of the cylinder stats directly switched the pump that sends hot water down to the UFH manifold, but that sounds wrong as the pump would be pumping whenever the tank was hot, even if the UFH was not calling for heat.</p><p></p><p>There's no other form of heat input so no need for dump circuits.</p><p></p><p>Apparently it was the owners "mate" who wired this house and couldn't figure the heating. I suspect that may not be the last I hear of this house. It's not quite finished so I doubt it's been signed off by building control yet.</p><p></p><p>As an aside, I thought the CU looked quite neat. One I've not seen before. Then I saw the make, Proteus. That's CEF stuff isn't it? (goes to wash mouth out with soap) Never thought I would like anything from CEF.</p></blockquote><p></p>
[QUOTE="ProDave, post: 265403, member: 6969"] Thanks SL I plan to feed the boiler control loop from the HW output of the programmer as that allows me to re use the cables that are already pulled in rather than providing a new feed for it. One thing that has occurred to me is I need to set the programmer for "gravity HW" so if someone programmes it wrong and tries to turn on heating without HW, then the programmer will automatically turn the HW on as well. There's two cylinder stats, but both at the same level low down on the tank. I'm not sure whether to just use one, or connect both of them in parallel for redundancy? The way it was wired before, one of the cylinder stats directly switched the pump that sends hot water down to the UFH manifold, but that sounds wrong as the pump would be pumping whenever the tank was hot, even if the UFH was not calling for heat. There's no other form of heat input so no need for dump circuits. Apparently it was the owners "mate" who wired this house and couldn't figure the heating. I suspect that may not be the last I hear of this house. It's not quite finished so I doubt it's been signed off by building control yet. As an aside, I thought the CU looked quite neat. One I've not seen before. Then I saw the make, Proteus. That's CEF stuff isn't it? (goes to wash mouth out with soap) Never thought I would like anything from CEF. [/QUOTE]
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(re) wiring a CH system with a heat store tank.
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