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Central Heating & Storage Heaters Forum
Changing Mechanical Programmer to Digital
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<blockquote data-quote="bazzzar" data-source="post: 153955" data-attributes="member: 11183"><p>Hi all</p><p></p><p>This is just a hyperthetical question at the moment...</p><p></p><p>My heating system at home consists of a standard boiler with cylinder and cylinder stat, pumped with one 2 port zone valve (think it's 2 port), no room stat, TRV's on all rads and a <a href="http://www.plumbnation.co.uk/site/danfoss-randall-set-3m-electro-mechanical-programmer-087n653200/Danfoss%20SET%203M%20Instruction%20Guide.pdf" target="_blank">Danfoss Set3M programmer</a></p><p></p><p>I have been given a <a href="http://www.horstmann.co.uk/downloads/ElectronicDocuments/Central-Heating/C27-InstallerGuide.pdf" target="_blank">Horstmann C27</a> and wanted to know how easy or difficult it would be to change the wiring.</p><p></p><p>The Danfoss has a 9 pin backplate - E N L 1 2 3 4 5 6</p><p></p><p>The C27 has a 7 pin backplate - E N L 1 2 3 4</p><p></p><p>Without taking the thing off the wall, from memory I have 2 3 core cables consisting of different colours going into the programmer, but if you need more info on what wires are connected to what pins I will take it back off.</p><p></p><p>I have been told by Horstmann that the system will have to be re-wired to accomodate the new programmer and unfortunately in no posistion to pay someone. As you can tell by the links above, the Danfoss is quite a beast and because I am moving the programmer to the hallway outside the kitchen I wanted a more slimline digital one. Many thanks in advance for your input.</p></blockquote><p></p>
[QUOTE="bazzzar, post: 153955, member: 11183"] Hi all This is just a hyperthetical question at the moment... My heating system at home consists of a standard boiler with cylinder and cylinder stat, pumped with one 2 port zone valve (think it's 2 port), no room stat, TRV's on all rads and a [URL="http://www.plumbnation.co.uk/site/danfoss-randall-set-3m-electro-mechanical-programmer-087n653200/Danfoss%20SET%203M%20Instruction%20Guide.pdf"]Danfoss Set3M programmer[/URL] I have been given a [URL="http://www.horstmann.co.uk/downloads/ElectronicDocuments/Central-Heating/C27-InstallerGuide.pdf"]Horstmann C27[/URL] and wanted to know how easy or difficult it would be to change the wiring. The Danfoss has a 9 pin backplate - E N L 1 2 3 4 5 6 The C27 has a 7 pin backplate - E N L 1 2 3 4 Without taking the thing off the wall, from memory I have 2 3 core cables consisting of different colours going into the programmer, but if you need more info on what wires are connected to what pins I will take it back off. I have been told by Horstmann that the system will have to be re-wired to accomodate the new programmer and unfortunately in no posistion to pay someone. As you can tell by the links above, the Danfoss is quite a beast and because I am moving the programmer to the hallway outside the kitchen I wanted a more slimline digital one. Many thanks in advance for your input. [/QUOTE]
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