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Need Help Wiring A Boiler
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<blockquote data-quote="ProDave" data-source="post: 438327" data-attributes="member: 6969"><p>This is an outside oil fired combination boiler.</p><p></p><p>You can't use a 4 core flex, 5 core minimum. It has to have the permanent L to operate the frost stat so it doesn't freeze, as well as the switched L for CH and switched L for hot water, and of course N and E</p><p></p><p>The manual is missleading saying it a volt free contact. If controlling it from an external programmer as you are proposing, then a conventional 2 channel programmer with switched L output is what you want. If you read the manual in more detail, you would find it is possible to knock out a square hole in the boilers control panel, and fit an internal programmer, and THAT is the one that must have volt free contacts if you fit it.</p><p> </p></blockquote><p></p>
[QUOTE="ProDave, post: 438327, member: 6969"] This is an outside oil fired combination boiler. You can't use a 4 core flex, 5 core minimum. It has to have the permanent L to operate the frost stat so it doesn't freeze, as well as the switched L for CH and switched L for hot water, and of course N and E The manual is missleading saying it a volt free contact. If controlling it from an external programmer as you are proposing, then a conventional 2 channel programmer with switched L output is what you want. If you read the manual in more detail, you would find it is possible to knock out a square hole in the boilers control panel, and fit an internal programmer, and THAT is the one that must have volt free contacts if you fit it. [/QUOTE]
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