Siemens Building Technology GRD221.1U Actuator
The 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 rapid 15-second fail-safe spring return during power loss or emergency detection. The electronic fire and smoke actuator features a plenum-rated construction and a 3-foot cable, making it ready for immediate integration into high-voltage building automation systems where high-temperature performance—tested up to 350°F—is a non-negotiable requirement for contractor-led installations.
Key Benefits- UL Listed Safety: Fully compliant with UL555 and UL555S for fire and smoke control in commercial air-handling spaces.
- High-Torque Performance: Provides 30 lb-in torque to reliably drive small to mid-sized dampers under high-pressure conditions.
- Fail-Safe Engineering: Mechanical spring return mechanism ensures dampers reach a safe position within 15 seconds during power outages.
- Extreme Temperature Resilience: Engineered to operate in environments ranging from 0°F to 140°F, with one-time emergency operation at 350°F.
- Plenum Rated: Durable housing is suitable for air-handling spaces and features an IP40 protection rating.
Is the GRD221.1U compatible with electronic fusible links?
Yes, this model supports electronic fusible link (EFL) integration, typically the ASK791 series, allowing the actuator to trigger based on external temperature thresholds like 165°F or 250°F.
Can this actuator replace the Siemens GND221 series?
The GRD221.1U is the direct performance alternative for the GND221, utilizing the same 120VAC two-position signal for seamless retrofitting in fire-rated HVAC systems.
What is the primary difference between the GRD and GKD series?
While both are 120V fire smoke actuators, the GRD series provides 30 lb-in of torque for standard damper sizes, whereas the GKD series is utilized for larger assemblies requiring up to 80 lb-in.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $164.26
-65%$164.26
$57.49Siemens Building Technology GRD221.1U Actuator
The 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 rapid 15-second fail-safe spring return during power loss or emergency detection. The electronic fire and smoke actuator features a plenum-rated construction and a 3-foot cable, making it ready for immediate integration into high-voltage building automation systems where high-temperature performance—tested up to 350°F—is a non-negotiable requirement for contractor-led installations.
Key Benefits- UL Listed Safety: Fully compliant with UL555 and UL555S for fire and smoke control in commercial air-handling spaces.
- High-Torque Performance: Provides 30 lb-in torque to reliably drive small to mid-sized dampers under high-pressure conditions.
- Fail-Safe Engineering: Mechanical spring return mechanism ensures dampers reach a safe position within 15 seconds during power outages.
- Extreme Temperature Resilience: Engineered to operate in environments ranging from 0°F to 140°F, with one-time emergency operation at 350°F.
- Plenum Rated: Durable housing is suitable for air-handling spaces and features an IP40 protection rating.
Is the GRD221.1U compatible with electronic fusible links?
Yes, this model supports electronic fusible link (EFL) integration, typically the ASK791 series, allowing the actuator to trigger based on external temperature thresholds like 165°F or 250°F.
Can this actuator replace the Siemens GND221 series?
The GRD221.1U is the direct performance alternative for the GND221, utilizing the same 120VAC two-position signal for seamless retrofitting in fire-rated HVAC systems.
What is the primary difference between the GRD and GKD series?
While both are 120V fire smoke actuators, the GRD series provides 30 lb-in of torque for standard damper sizes, whereas the GKD series is utilized for larger assemblies requiring up to 80 lb-in.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The 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 rapid 15-second fail-safe spring return during power loss or emergency detection. The electronic fire and smoke actuator features a plenum-rated construction and a 3-foot cable, making it ready for immediate integration into high-voltage building automation systems where high-temperature performance—tested up to 350°F—is a non-negotiable requirement for contractor-led installations.
Key Benefits- UL Listed Safety: Fully compliant with UL555 and UL555S for fire and smoke control in commercial air-handling spaces.
- High-Torque Performance: Provides 30 lb-in torque to reliably drive small to mid-sized dampers under high-pressure conditions.
- Fail-Safe Engineering: Mechanical spring return mechanism ensures dampers reach a safe position within 15 seconds during power outages.
- Extreme Temperature Resilience: Engineered to operate in environments ranging from 0°F to 140°F, with one-time emergency operation at 350°F.
- Plenum Rated: Durable housing is suitable for air-handling spaces and features an IP40 protection rating.
Is the GRD221.1U compatible with electronic fusible links?
Yes, this model supports electronic fusible link (EFL) integration, typically the ASK791 series, allowing the actuator to trigger based on external temperature thresholds like 165°F or 250°F.
Can this actuator replace the Siemens GND221 series?
The GRD221.1U is the direct performance alternative for the GND221, utilizing the same 120VAC two-position signal for seamless retrofitting in fire-rated HVAC systems.
What is the primary difference between the GRD and GKD series?
While both are 120V fire smoke actuators, the GRD series provides 30 lb-in of torque for standard damper sizes, whereas the GKD series is utilized for larger assemblies requiring up to 80 lb-in.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
