LF120-S

Description:

For On/Off, fail-safe control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturers specifications. Control is On/Off from an auxiliary contact or a manual switch. 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

The LF120-S US version are 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.

Specifications:

• Actuator Type: Spring return
• Angle of Rotation: 95
• Control Type: On/Off
• Degree of Protection: IP54, NEMA2, ULEnclosureType2
• Direction of Rotation (Fail-Safe): Reversible with cw/ccw mounting
• Electrical Connection: cable
• Power Consumption (Holding): 3.5 W
• Power Consumption (Running): 5.5 W
• Running Time (Fail-safe): <25s
• Running Time (Motor): 75s
• Safety Function: YES
• Shaft Diameter: 3/8…1/2″ round, centers on 1/2″
• Torque: 35in-lb [4Nm]
• Voltage AC/DC: AC120V
• Auxiliary switch: 1 x SPDT, 3 A resistive (0.5 A inductive) @ AC 250 V, adjustable 0…95

Also See:

• Belimo LF120 Spring Return Actuator

Resources:

• Belimo LF120-S Spring Return Actuator Technical Litertaure
  
• Belimo LF Spring Return Actuator Installation Instructions