The ACT 443 ProClick constant temperature controller is a controller used in installations to maintain a constant temperature of the medium downstream of the rotary mixing valve. It can be used on both 3- and 4-way valves. A wide range of temperature control (10÷90°C) in combination with a clear color display allows the controller to be used in both heating and cooling systems. Each ACT ProClick controller is equipped with a medium temperature sensor downstream of the valve (1 m) and an electrical cable terminated with a plug (2 m). Any changes to the settings are made using the buttons located under the knob. In addition, the ACT 443 ProClick controller is equipped with an additional temperature sensor (3 m) and the ability to switch the circulation pump on or off when the set temperature values are exceeded. The controller has a function protecting the boiler against too low return temperature, while regulating the temperature going out to the installations. Therefore, it is recommended for installation with solid combustion boilers on 4-way mixing valves.