Siemens Building Technology GRD121.1U Actuator 321042-401 If the electrical coil is

If the electrical coil is burnt out

It arrives pre-assembled with the motor already secured within the housing and the wheel properly aligned

this gear-train driven unit provides constant 60 lb-in torque to ensure reliable positioning in demanding commercial HVACR environments

It features a straight body configuration with 1 1/8" ODF solder connections and a primary balanced port design

Siemens Building Technology GRD121.1U Actuator 321042-401 If the electrical coil isThe Siemens GRD121. 1U is a high torque 24V fire and smoke damper actuator engineered for precise 2 position control in critical life safety systems. As a veteran technician knows, reliability in smoke containment is non negotiable; this OpenAir electronic actuator delivers 30 lb in of torque to ensure positive closure against high velocity airflow. Operating on 24 VAC DC, the GRD121. 1U features a robust spring return fail safe mechanism that