HK 50 M – HK 10M – HK 100S SERVICE BULLETIN1.7.8. FanIt enables the air gas mixture to reach the burner and combustion chamber by means of the venturi (air gasmixer). The other task of the fan is to send the waste gas to the waste gas system. (Figure 11)1.7.9. Gas valveIt is connected to the venturi above the combustion chamber. It has an aluminum casting body. There aretwo safety valves electrically. It runs as electrically parallel and mechanically serial connected.1.7.10. VenturiVenturi is an aluminum material. By creating a venturi, it sends air and gas mixture to the burner via thefan. Figure. 1.13Service Administration 10 03/2010
