Source google image: https://www.bricozone.be/data/attachment-files/2017/03/3232_d294f8bc97d937f4c802b3c92a67ad94.png
Schema electrique chaudiere gaz vaillant
Source google image: https://www.bricozone.be/data/attachment-files/2017/03/3232_d294f8bc97d937f4c802b3c92a67ad94.png