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Vitocell 300 temp sensor connection

Hello, can anyone please tell me where the Vitocell 300 7179-114 temp sensor connects on a Vitodens 200 WB2B-45?  The plug on the end of sensor is labeled "5", and it's white with 2 pins, an ulabeled brown wire, and a blue wire with a "NTC 10K" tab.  I've scoured all the installation manuals and studied both the power pump module and the boiler board and can't see where it goes.  I've got the LLH temp sensor and outdoor temp sensor connected to X3. 


  • veissman_Bob
    veissman_Bob Member Posts: 48
    I found it!

    It took a while but it's not a connector at all.  There are two plugs in the back left corner of the control control unit.  Both are red and each is marked with  the number "5".  Theyre unlike all the other connectors so it threw me for a little loop but all is well now!
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