SIEMENS
SIEMENS GQD221.1U thermostat, 20 in-lb, 120V AC
Electric actuator delivers 20 in-lb torque with 120V AC supply and spring return in 15 seconds
- TypeLearning Thermostats
- Delivers 20 in-lb torque for reliable damper control
- Spring-return action closes in 15 seconds for safety
- Self-centering shaft coupling simplifies direct mounting
- 120 V AC input suits standard building wiring
- NEMA 1 and IP40 ratings protect internal components
Electric actuator for building automation
The SIEMENS GQD221.1U is an electric actuator designed for damper control in building automation systems. It operates on 120V AC input and delivers a rated torque of 20 in-lb for reliable valve and damper operation. The unit features a self-centering shaft coupling and spring return function for fail-safe positioning.
Suited for on/off damper control
This actuator suits installations requiring simple on/off signal control with a 2 to 10V DC output signal for position feedback. It mounts directly to the damper shaft with CW/CCW rotation capability across 90 degrees of stroke. Buyers needing modulating control or different voltage ratings should look at other models.
Torque and speed headroom for standard dampers
The 20 in-lb torque handles typical commercial damper loads with a 15-second spring return closing time. NEMA 1 and IP40 ratings provide protection for indoor environments. The hardwired electrical connection and fixed 120V AC input limit flexibility for installations requiring plug-in connections or alternative voltages.
Highlights
- Delivers 20 in-lb torque for reliable damper control
- Spring-return action closes in 15 seconds for safety
- Self-centering shaft coupling simplifies direct mounting
- 120 V AC input suits standard building wiring
- NEMA 1 and IP40 ratings protect internal components
Specifications
| Brand | SIEMENS |
|---|---|
| Type | Learning Thermostats |
Questions about this item
What voltage supply and control signal does the GQD221.1U actuator require?
It operates on 120V AC input and accepts a 2 to 10V DC output signal for control.
Can the actuator be direct-mounted to an existing damper shaft without a separate linkage kit?
Yes, it features a self-centering shaft coupling and direct-mount design for 90-degree rotation.
How can I verify the spring-return function is operating correctly after installation?
Power the unit off and confirm the damper drives to its fail-safe position within 15 seconds.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
