iO HVAC Controls CB-KIT Retro Actuator Kit For Carrier DampersiO HVAC Controls CB KIT Retro Actuator Kit for Carrier Dampers The CB KIT is a universal actuator kit that is designed to replace actuators used with Carrier Infinity, Bryant Evolution Comfortmaker; Ion zone dampers when used with other zone control panels requiring a 3 wire actuator with overload protection that allows the actuator to remain energized at the end of travel while maintaining full rated torque. This kit is compatible with Carrier and