Siemens Building Technology GRD221.1U Actuator 321894-709 Is the 1" NPT vent

Is the 1" NPT vent required to be piped away

and Payne N-coil and blower assemblies

Housed in a plenum-rated NEMA 1 enclosure

ensuring a consistent spray pattern that minimizes soot buildup and prevents electrode fouling

Precision Thermal Sensing: Designed for high-recovery systems where accurate temperature differentials are required for safety and efficiency

Siemens Building Technology GRD221.1U Actuator 321894-709 Is the 1" NPT ventThe Siemens Building Technology GRD221. 1U Actuator is a specialized 120V fire and smoke damper actuator designed for critical life safety HVACR applications. As a veteran grade two position spring return actuator, it delivers 30 lb in of torque, ensuring reliable open close operation for smoke control and combination fire smoke dampers. Built to exceed the rigors of UL555 and UL555S standards, this unit provides a nominal 30 second drive time and a