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Vaillant ecotec plus VCW BE 296/3-5 and Thermostat NEST 3

MaximBe
Community Member

Hello Community 😊

 

I currently have the system below (with a 2-wire thermostat) and I'd like to upgrade to Google NEST 3 to manage the heating (but not the hot water).

Boiler before.pngIMG_3558.JPEGIMG_3557.JPEG

On the white connection bar, LN is connected to the power supply, and pins 3 and 4 are connected to the 2-wire thermostat.

 

After a lot of research, I've deduced that I'll have to connect the whole system as shown below, is that OK?

Boiler after.png

The boiler documentation (sorry it's only in french)

949544b1-0030-44a0-9cbe-410f275b8b5e.png

 

Thank you very much for your help 

Max

 

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