Installation: First of all, you need to connect the double color cable to 220v N, - Secondly, find a switch to change the connection of the blue L-shaped cable to 220v and the connection of the brown L-shaped cable to 220v. - When the blue wire is connected to 220 V L, the AB path will open. - When the brown cable is connected to 220 V L, the AC path will open. - Note: the blue wire and the brown wire cannot be connected simultaneously to 220v L. Power: 6VA; Voltage: 220v Liquid temperature: 0-90 degrees; Ambient temperature: 0-60 degrees the flow diameter: 1/2 inch: 10 mm; 3/4 inches: 12.5 mm; 1 inch: 17 mm; 1-1 / 4 inches: 24 mm; 1-1 / 2 inches: 30.5 mm Execution time: 15 seconds, Manufacturer: Dawa Materials