LF24-3 US | Damper Actuator | 35 in-lb | Spg Rtn | 24V | On/Off/Floating Point | Belimo
Damper Actuator, 35 in-lb [4 Nm], Spring return, AC/DC 24 V, On/Off, Floating point
Documents and manuals
Belimo LF24-3 US Documents
Overview
Details for LF24-3 US
Damper Actuator | 35 in-lb | Spg Rtn | 24V | On/Off/Floating Point
Damper Actuator | 35 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 3/8” up to 1/2” in diameter by means of its universal clamp, 1/2” shaft centered at delivery. For shafts up to 3/4” use K6-1 accessory. 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 from a fan motor contactor, controller or manual switch
Operation
The LF 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 LF series provides 95° of rotation and is provided with a graduated position indicator showing 0 to 95°. The LF 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.
Specifications
- Actuator Type
- Spring return
- Angle of Rotation
- 90
- Control Type
- Floating/3-point
- Cv
- 49
- Degree of Protection
- IP54 NEMA 2
- Electrical Connection
- cable
- End Fitting
- Internal thread
- Fluid
- Potable water
- Pattern
- 2-way
- Power Consumption (Holding)
- 1 W
- Power Consumption (Running)
- 2.5 W
- Pressure Independent
- NO
- Product Type
- Combo
- Running Time (Fail-safe)
- <25 s
- Running Time (Motor)
- 150 s / 90B0
- Torque
- 35 in-lb [4 Nm]
- Valve Size
- 0.75" [20]
- Voltage AC/DC
- AC/DC 24 V