... tech automatic control system, equipped with multiple security protection device, water protections,overpressure protection, remove protection, abnormal pressure protection, the ... flue overtemperature protection.CWNS Series (Leaving/Returning Water Temperature: 95/70°C) ItemModelCWNS0.35-95/70-Y( ... , heavy oil 9600kcal/kg , natural gas 8550kcal/Nm3 High Quality Hot Water Boiler