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Ufh And By-Pass Pump
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<blockquote data-quote="ProDave" data-source="post: 300338" data-attributes="member: 6969"><p>I don't see how an UFH system can work properly with a home made junction box like the one Step's posted in post #13</p><p></p><p>While in principle, each zone thermostat could directly switch the actuator for that zone, you are missing out on the switching for the circulating pump, which as I have said before, needs to come on when ANY zone calls for heat, and stop when no zones are calling for heat. That needs one or more relays to achieve that.</p><p></p><p>I guess at the moment the pump runs all the time, so pumping into a dead end if none of the zones are calling for heat.</p><p></p><p>You don't need a seperate timer for each manifold, unless you want to. in our house one timer turns on both manifolds, upstairs and downstairs.</p><p></p><p>I assume this rcd tripping thing when he bled the pump was merely water escaping from the bleed port and getting into the terminals and will never happen again.</p></blockquote><p></p>
[QUOTE="ProDave, post: 300338, member: 6969"] I don't see how an UFH system can work properly with a home made junction box like the one Step's posted in post #13 While in principle, each zone thermostat could directly switch the actuator for that zone, you are missing out on the switching for the circulating pump, which as I have said before, needs to come on when ANY zone calls for heat, and stop when no zones are calling for heat. That needs one or more relays to achieve that. I guess at the moment the pump runs all the time, so pumping into a dead end if none of the zones are calling for heat. You don't need a seperate timer for each manifold, unless you want to. in our house one timer turns on both manifolds, upstairs and downstairs. I assume this rcd tripping thing when he bled the pump was merely water escaping from the bleed port and getting into the terminals and will never happen again. [/QUOTE]
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