HK 50 M – HK 10M – HK 100S SERVICE BULLETIN1.7.14. Safety valveIt is on the water flow pipe. It must be connected to the waste water system with a drainage hose. Itprotects the hydraulic circuit at high pressures caused by overheating of the primary circuit. It is set to 6bars. (Figure 1.17)Introducing the Safety Components of the DeviceSafety Thermostat: It has manual reset. When 90°C is exceeded, it is activated and turns off thedevice.Waste Gas Temperature Sensor: When the wastegas temperature rises above 80 ºC, it turns off thesystem.Installation Circuit Protection: It prevents thedevice from working with insufficient water withinstallation flow and return temperature sensorsand water differential switch.Frost Protection Function: It is activated if thewaste gas temperature drops below 5 ºC.1.7.15 Introduction to the control panelHK 50MService Administration 12 03/2010
