Siemens GRD121.1U : Spring Return Fire and Smoke Damper Actuator, 24 VAC/DC, 20 LB-in Torque, 2-Position On/Off Control Signal, 30-second Run Time, 15-second Spring Return Time
The Siemens GRD121.1U OpenAir GRD spring return damper actuator is built for 2-position control of smoke control and combination fire/smoke dampers in HVAC systems. It provides 30 lb-in torque with a nominal 30-second drive time and a 15-second spring return for fail-safe operation. It operates on 24 Vac/Vdc power and is plenum-rated for use in air-handling spaces. Operating temperature range is -40°F to 158°F.
Specifications:
|
Actuator Type
|
Electronic Fire and Smoke
|
|
Actuation Style
|
Rotary |
|
Control or Fire/Smoke Type
|
Fire/Smoke Control Damper
|
|
Electronic Fusible Link (EFL)
|
YES. Temperature ratings: 165°F, 212°F, 250°F, 350°F (ASK791 series). |
|
Plenum or Standard Rating
|
Plenum-rated |
| Torque |
30 lb-in
|
|
Fail Safe
|
Yes |
|
Spring return function
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Spring return function
|
|
Control Signal
|
2-position
|
|
Positioning time
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Operating: 30 s runtime for 90°; Closing (power loss with spring return: 15 s max
|
|
Power consumption
|
Running: ~14 VA/8W, Holding: ~4 VA/2 W
|
|
Ambient temperature, operation
|
0°F to 140°F (-18°C to 60°C). 350°F (177°C) one time per UL555S.
|
|
Ambient humidity, operation
|
Maximum 95% rh non-condensing
|
|
Angular rotation
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95°
|
|
Operating voltage
|
24 VAC/DC
|
|
Supply Voltage
|
24 VAC/DC
|
|
Frequency
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50/60 Hz
|
|
Auxiliary Switch
|
No |
|
Cable length
|
3 ft
|
|
Dimensions (W x H x D)
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3.5 x 8.5 x 3 in
|
|
Material, housing
|
NEMA 1, plenum-rated plastic
|
|
Degree of protection
|
IP40
|
| Standard | UL60730; cUL CSA 60730; CE conformity for Residential, Commercial, and Industrial environments |
Datasheets
Ê
- Actuator Type:
- Fire & Smoke Actuator
- Voltage:
- 24VAC/DC
- Control Signal:
- On/Off
- Auxillary Switch:
- None
