Series 90C is a complete weather-compensating control unit with integrated actuator for use on mixing valves. The controller comes in 2 different versions, all equiped with full graphic display for easy handling and instant set-up. Depending of version can Series 90C handle up to 6 different sources of data input and has up to 3 possibilites of output control. This makes the 90C versatile and able to control a number of heat circuits and system components with high accaracy.