Siemens Building Technology GRD121.1U Actuator 320819-301 The manual reset feature ensures

The manual reset feature ensures that technicians must physically inspect the system before restarting

installing this surge suppressor provides a robust defense against atmospheric disturbances and localized grid fluctuations

Is the compression nut included with the assembly

supporting up to 5 stages of heat and 2 stages of cool

Siemens Building Technology GRD121.1U Actuator 320819-301 The manual reset feature ensuresThe 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