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economy 7 water heating
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<blockquote data-quote="ProDave" data-source="post: 251110" data-attributes="member: 6969"><p>I'm not following what you mean, and can't recall which terminal does what. All I remember is there is a wiring diagram inside them.</p><p></p><p>What you NEED is both a permanent and an off peak supply.</p><p></p><p>The way it works, is when the switch is in "timed" position, the off peak supply is connected to the heater.</p><p></p><p>As soon as you rotate the boost dial, a double pole changeover switch (built into the dial) changes over to connect the heater to the permanent supply and feeds the heater like that until the timer expires, whereupon the changeover contact switches back, and the heater is ready to be powered by the next over night period of the off peak feed.</p><p></p><p>So it NEEDS two feeds two the controller, and one cable from the controller to the heater element.</p><p></p><p>Your task is how to achieve that using the cables you have without having to pull any more cables through. But it sounds to me as though you only have two cables connected to the horstman, in which case finding a route to connect a third is unavoidable.</p></blockquote><p></p>
[QUOTE="ProDave, post: 251110, member: 6969"] I'm not following what you mean, and can't recall which terminal does what. All I remember is there is a wiring diagram inside them. What you NEED is both a permanent and an off peak supply. The way it works, is when the switch is in "timed" position, the off peak supply is connected to the heater. As soon as you rotate the boost dial, a double pole changeover switch (built into the dial) changes over to connect the heater to the permanent supply and feeds the heater like that until the timer expires, whereupon the changeover contact switches back, and the heater is ready to be powered by the next over night period of the off peak feed. So it NEEDS two feeds two the controller, and one cable from the controller to the heater element. Your task is how to achieve that using the cables you have without having to pull any more cables through. But it sounds to me as though you only have two cables connected to the horstman, in which case finding a route to connect a third is unavoidable. [/QUOTE]
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