Viessmann
Viessmann 7818900 Flame detector QRC1 Burner No.: 7318791, 7318792, 7318793, 7318920, 7318921, 7318922, 7318950, 7318951, 7318952, 7318985, 7318986, 7318987, 7328168, 7328169, 7328170, 7328184, 7328185, 7328186, 7718780, 7718782 Manufacturer No.: 7818900