Welcome! Here are the website rules, as well as some tips for using this forum.
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.