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Central Heating & Storage Heaters Forum
Y Plan / Mid Position Valve - Odd Boiler Behaviour
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<blockquote data-quote="Steve3948" data-source="post: 290756" data-attributes="member: 2497"><p>It's a micro switch array inside the valve head, make or break and that's it, the voltage comes from the programmer through the stats opens/closes valve motor in turn switching auxiliary contacts in valve to then energise boiler and pump.</p><p></p><p>In your post you said you had nothing on Hot Water off, a Y Plan needs an output from programmer when hot water is off to work correctly.</p><p></p><p>Is it a system boiler, built in programmer, pump etc.</p></blockquote><p></p>
[QUOTE="Steve3948, post: 290756, member: 2497"] It's a micro switch array inside the valve head, make or break and that's it, the voltage comes from the programmer through the stats opens/closes valve motor in turn switching auxiliary contacts in valve to then energise boiler and pump. In your post you said you had nothing on Hot Water off, a Y Plan needs an output from programmer when hot water is off to work correctly. Is it a system boiler, built in programmer, pump etc. [/QUOTE]
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Y Plan / Mid Position Valve - Odd Boiler Behaviour
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