GMB24-3 Belimo Damper Actuator

Datasheet

Installation Guide

Application

For on/off and floating point 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 up to 1.05” in diameter by means of its universal clamp. A crank arm and several mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft.

Operation

The actuator is not provided with and does not require any limit switches, but is electronically protected against overload. The anti-rotation strap supplied with the actuator will prevent lateral movement. The actuator provides 95° of rotation and a visual indicator indicates position of the actuator. When reaching the damper or actuator end position, the actuator automatically stops. The gears can be manually disengaged with a button on the actuator cover. The actuators use a brushless DC motor, which is controlled by an Application Specific Integrated Circuit (ASIC). The ASIC monitors and controls the actuator’s rotation and provides a digital rotation sensing (DRS) function to prevent damage to the actuator in a stall condition. Power consumption is reduced in holding mode. Add-on auxiliary switches or feedback potentiometers are easily fastened directly onto the actuator body for signaling and switching functions. For low ambient temperatures, the optional supplemental (-H) Heater add-on is available

Specifications

• Actuator Type
  • Non fail-safe
• Angle of Rotation
  • 95°
• Control Type
  • Floating/3-point
• Degree of Protection
  • IP54, NEMA 2, UL Enclosure Type 2
• Electrical Connection
  • Cable
• Manual Override
  • External push button
• Power Consumption (Holding)
  • 2 W
• Power Consumption (Running)
  • 4 W
• Running Time (Motor)
  • 150 s, constant, independent of load
• Safety Function
  • NO
• Shaft Diameter
  • 1/2…1.05″ round, centers on 1/2″ and 3/4″ with insert, 1.05″ without insert
• Torque
  • 360 in-lb [40 Nm]
• Voltage AC/DC
  • AC/DC 24 V