LFC243US | 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 LFC243US Documents
Overview
Details for LFC243US
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. The ZG-LFC114 universal mounting kit can be used with the LFC24-3-S US actuator for retrofit of the economizer section of the Trane Voyager unit. 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 LFC24-3-S US 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. 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. The LFC24-3-S US version is provided with one built-in auxiliary switch. This SPDT switch is provided for safety interfacing or signaling, for example, for fan start-up. The switching function is adjustable between 0° and 95°. The auxiliary switch in the LFC24-3-S US is double insulated so an electrical ground is not necessary
Specifications
- Actuator Type
- Spring return
- Angle of Rotation
- 95
- Control Type
- Floating/3-point
- Degree of Protection
- IP54 NEMA 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)
- 90 s / 90B0
- Safety Function
- YES
- Torque
- 35 in-lb [4 Nm]
- Voltage AC/DC
- AC/DC 24 V
Parts & Accessories
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