> Building Automation > Damper Actuators > AFR24-SR,8751049000,Spring Return Actuator for Open/Close Damper Actuation 15 Nm (11 ft-lb) 
AFR24 -SR and open/close spring return actuators are intended for operation of air dampers of up to approximately 3 m2 (32 ft2) cross sectional area that perform safety functions, e.g. frost and smoke protection, hygiene, etc.
Either direction of rotation can be selected.
The spring return operates as a safety function if the power supply fails or is interrupted. The spring pretensioning can be manually adjusted.
AFR24 -SR actuators can be manually operated and have integral position stops. The -S models have two auxiliary switches for signalization.
Power supply 24 V AC ±20%, 50–60 Hz,24 V DC -10%, +20% Power consumption opening 6 W open 2.5 W For wire sizing 10 VA Connection cable 1 m (3.3 ft), 5×0.75 mm2 (AWG 18) Angle of rotation max. 95° (adjustable26–95% with additional limit stop ZDB-AF Torque Actuator min. 15 Nm (11 ft-lbf) (at rated voltage) Spring return min. 15 Nm (11 ft-lbf) Running time Actuator approx. 150 s Spring return approx. 16 s Direction of rotation selected by mounting L/R Position indication mechanical Standards conformity EMC, emission SS EN 50081-1 EMC, immunity SS EN 50082-1 Protection class III (safety extra-low voltage) Enclosure rating IP 54 Ambient humidity EN 60335-1 Ambient temperature: Operation –30 to +50 °C (–22 to +122 °F) Storage –40 to +80 °C (–40 to +176 °F) Sound power level Actuator max. 50 dB (A) Spring approx. 62 dB (A) Service life min. 60 000 operations Maintenance maintenance-free Weight: 2.7 kg (6.0 lb.)
