Wet rotor electronic circulator designed for the circulation of water in residential building service with thermal solar collector heating systems. It is equipped with a permanent magnet synchronous motor and electronics with variable frequency drive that automatically adapts the performance to the actual requirements of the system, to save energy and protect against water hammer action. It is designed to ensure simple configuration: a sequential key can be used to scroll between the operating modes. All the models have a brass air vent plug and enable manual release of the motor shaft. Threaded suction and delivery ports. Technopolymer impeller. Cataphoretically-coated cast iron pump body, stainless steel motor casing. A version controlled by PWM external signal (1,5 m plug cable) is also available. 1,5 m molex plug cable. IPX5 protection. The included calcium removal cartridge keeps the motor shaft in perfect condition, preventing the normal formation of limescale that it can be generated inside the circulator if some air bubbles are present during the first installation. 5 years warranty.