TFB24-3 | Damper Actuator | 22 in-lb | Spg Rtn | 24V | On/Off/Floating Point | Belimo
Overview
Details for TFB24-3
Damper Actuator | 22 in-lb | Spg Rtn | 24V | On/Off/Floating Point
Application
For modulation or On/Off, fail-safe control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer’s specifications. The actuator is mounted directly to a damper shaft from 1/4” up to 1/2” in diameter by means of its universal clamp, 1/2” shaft centered at delivery. A crank arm and several mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft. Control is floating point from a triac or relay, or On/Off from an auxiliary contact on a fan motor contactor, controller or manual switch.
Operation
The TF series actuators provide true spring return operation for reliable fail-safe application and positive close-off on air tight dampers. The spring return system provides consistent torque to the damper with, and without, power applied to the actuator. The TF series provides 95° of rotation and is provided with a graduated position indicator showing 0 to 95°. The TF uses a brushless DC motor which is controlled by an Application Specific Integrated Circuit (ASIC) and a microprocessor. The microprocessor provides the intelligence to the ASIC to provide a constant rotation rate and to know the actuator’s exact fail-safe position. The ASIC monitors and controls the brushless DC motor’s rotation and provides a digital rotation sensing function to prevent damage to the actuator in a stall condition. The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches. Power consumption is reduced in holding mode.
Safety Note: Screw a conduit fitting into the actuator’s bushing. Jacket the actuator’s input and output wiring with suitable flexible conduit. Properly terminate the conduit in a suitable junction box.
Specifications
- Actuator Type
- Spring return
- Angle of Rotation
- 95
- Control Type
- Floating/3-point
- Degree of Protection
- IP42 NEMA 2 UL Enclosure Type 2
- Direction of Rotation (Fail-Safe)
- Reversible with cw/ccw mounting
- Electrical Connection
- cable
- Power Consumption (Holding)
- 1 W
- Power Consumption (Running)
- 2.5 W
- Running Time (Fail-safe)
- <25 s
- Running Time (Motor)
- 95 s /
- Safety Function
- YES
- Torque
- 22 in-lb [2.5 Nm]
- Voltage AC/DC
- AC/DC 24 V