Description
The Belimo LF24 Rotary Actuator is designed for adjusting dampers in technical building installations, providing reliable performance and enhanced functionality. Ideal for applications requiring precise control and safety, the LF24 is perfect for tradesmen and engineering companies looking to optimize their HVAC systems.
- Nominal Voltage: AC/DC 24 V
- Control Type: Open/Close
- Air Damper Size Compatibility: Up to 0.8 m²
- Torque: 4 Nm
- Running Time (Motor): 75 seconds for 90°
- Fail-Safe Running Time: <20 seconds at -20...50°C / <60 seconds at -30°C
- Sound Power Level: 50 dB(A)
Electrical Data
- Nominal Voltage Frequency: 50/60 Hz
- Nominal Voltage Range: AC 19.2...28.8 V / DC 21.6...28.8 V
- Power Consumption in Operation: 5 W
- Power Consumption in Rest Position: 2.5 W
- Power Consumption for Wire Sizing: 7 VA (Imax 5.8 A @ 5 ms)
- Connection Supply/Control: Cable 1 m, 2x 0.75 mm²
- Parallel Operation: Yes (note the performance data)
Functional Data
- Torque Motor: 4 Nm
- Torque Fail-Safe: 4 Nm
- Direction of Motion Motor: Selectable by mounting L/R
- Direction of Motion Fail-Safe: Selectable by mounting L/R
- Manual Override: No
- Angle of Rotation: Max. 95° (Adjustable 37...100% with integrated mechanical limitation)
- Mechanical Interface: Universal shaft clamp 8...16 mm
- Position Indication: Mechanical
- Service Life: Minimum 60,000 fail-safe positions
Safety and Compliance
- Protection Class (IEC/EN): III, Safety Extra-Low Voltage (SELV)
- Degree of Protection (IEC/EN): IP54
- EMC: CE according to 2014/30/EU
- Low Voltage Directive: CE according to 2014/35/EU
- Certification: IEC/EN 60730-1 and IEC/EN 60730-2-14
- Hygiene Test: According to VDI 6022 Part 1 / SWKI VA 104-01
- Type of Action: Type 1.B
- Rated Impulse Voltage Supply/Control: 0.8 kV
- Pollution Degree: 3
- Ambient Humidity Max.: 95% RH, non-condensing
- Ambient Temperature: -30...50°C [-22...122°F]
- Storage Temperature: -40...80°C [-40...176°F]
- Servicing: Maintenance-free
- Weight: 1.4 kg
Electrical Accessories:
Auxiliary switch 2x SPDT (Type: S2A-F)
Feedback potentiometer 1 kΩ (Type: P1000A-F)
Mechanical Accessories:
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Shaft extension 170 mm ø10 mm for damper shaft ø6...16 mm (Type: AV6-20)
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Shaft clamp reversible, clamping range ø16...20 mm (Type: K6-1)
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Ball joint suitable for damper crank arm KH8 / KH10 (Type: KG10A)
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Damper crank arm, Slot width 8.2 mm, clamping range ø10...18 mm (Type: KH8)
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Actuator arm, clamping range ø8...16 mm, Slot width 8.2 mm (Type: KH-LF)
-
Angle of rotation limiter, with end stop (Type: ZDB-LF)
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Form fit adapter 8x8 mm (Type: ZF8-LF)
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Mounting kit for linkage operation for flat installation (Type: ZG-LF1)
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Mounting kit for linkage operation for side installation, Slot width 6.2 mm (Type: ZG-LF3)
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Anti-rotation mechanism 180 mm, Multipack 20 pcs. (Type: Z-ARS180L)
Operating Mode: The actuator moves the damper to the operating position while tensioning the return spring. It returns to the safety position using spring energy when the supply voltage is interrupted.
Simple Direct Mounting: Direct mounting on the damper shaft with a universal shaft clamp and anti-rotation device.
High Functional Reliability: Overload protected, no limit switches required, stops automatically when the end stop is reached.
For more information and to explore our range of Belimo products, visit our website at https://ecospares.co.uk/collections/belimo. If you need any assistance, please get in touch with us on 01772 284 626.
