Viessmann Valvola Gas Pt n.: 7842357 Gruppo Ventola Pt n.: 7842356 F&F
The set includes a Pt No: 7842357 Gas Valve and a Pt No: 7842356 Fan Assembly, both designed for indoor mounting locations and corded electric power sources. 100 WB1HC 26kW System (Serial No. 7570672) - 41-819-41 (7570672) Diagram.