Kromschroder Servomotor IC20-30W3T 88300060

The Kromschroder IC20-30W3T is a servomotor designed for precise rotary movement between 0 and 90 degrees, suitable for adjusting gas and air volumes on appliances and flue gas lines. It operates on 230 V AC, 50-60 Hz, with a torque of 3 Nm and a duty cycle of 100%. The motor features three-point step control, voltage-free limit switches, and an externally readable position indicator. It stops at its current position when power is disconnected, ensuring safety. The unit weighs 1950 g and has a storage temperature range of -20 to 40 °C.

When selecting a replacement servomotor of this type, ensure the supply voltage, frequency, torque, and control type (three-point step) match the existing system. The mounting must be compatible, and the unit should be installed ready on the control element. Check the cable cross-section (up to 2.5 mm² with ferrules) and line entrance (3 x M20 glands) for proper connection. The angle of rotation (0-90°) and holding torque must also be verified.

Common failures include loss of positioning accuracy, erratic movement, or complete stoppage. If the motor fails, the damper or valve may remain in one position, causing improper combustion or airflow. Check for loose wiring, damaged limit switches, or condensation inside the housing, as no condensation is permitted. Also verify the feedback potentiometer (1 kΩ, max 0.5 W) for wear or open circuits.