Belimo AFB24
SKU: CS2547167MPN: AFB24
Damper Actuator, 180 in-lb [20 Nm], Spring return, AC/DC 24 V, On/Off




Product Details
Features:
- Cut labor costs with simple direct coupling
- True mechanical spring return - the most reliable fail-safe
- Reverse mount for clockwise or counterclockwise fail-safe
- Check damper position easily with clear position indicator
- Overload-proof throughout rotation
- Temporary restrictions in damper movement will not change actuator operation. Actuator returns to normal operation when restriction is removed (modulating actuators)
- By eliminating internal condensation Golden Point breather membrane optimizes performance in harsh airstream environments
- Built-in auxiliary switch is easy to use, offers feedback or signal for additional device (-S models)
- Manual override crank speeds installation
- Need to change control direction? Do it easily with a simple switch (modulating actuators)
- Microprocessor-controlled brushless DC motor increases actuator life span and reliability, provides constant running time (modulating actuators)
- Rugged metal housing withstands rough handling in the mechanical room
- 3 ft. appliance cable and conduit connector eases installation
- Double insulated - no need for separate safety ground. A Belimo exclusive (-S,120V, 230V models)
- Automatically compensates for damper seal wear, ensuring tight close-off
The AFB24 is used for On/Off, fail-safe control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer’s specifications. Control is On/Off from an auxiliary contact, or a manual switch.
The AFB 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.
Attributes
| Control | On/Off |
| Fail-Safe | Spring Return |
| Torque | 180 in-lb |
| Nominal Voltage | AC/DC 24 V |
| Transformer Sizing | 7.5 VA (class 2 power source) |
| Enclosure | UL Enclosure Type 2 |
| Power Supply | 24 VAC, ±20%, 50/60 Hz, 24 VDC, -10% / +20% |
| Power Consumption In Operation | 5 W |
| Power Consumption In Rest Position | 2.5 W |
| Electrical Connection | 18 GA appliance cable, 3 ft [1 m], with ½” conduit connector |
| Overload Protection | electronic throughout 0…95° rotation |
| Angle Of Rotation | 95°, adjustable with mechanical end stop, 35…95° |
| Direction Of Motion Motor | selectable by ccw/cw mounting |
| Position Indication | Mechanical |
| Running Time (Motor) | 75 s |
| Running Time Fail-Safe | <20 s |
| Ambient Humidity | max. 95% r.H., non-condensing |
| Ambient Temperature | -22…122°F [-30…50°C] |
| Storage Temperature | -40…176°F [-40…80°C] |
| Degree Of Protection Iec/En | IP54 |
| Degree Of Protection Nema/Ul | NEMA 2 |
| Connection | cable |
| Servicing | maintenance-free |
| Housing Material | Galvanized steel and plastic housing |
| Nominal Voltage Dc | 24 V |
| Nominal Voltage Ac | 24 V |
| Noise Level, Motor | 50 dB(A) |
| Torque Motor | 180 in-lb [20 Nm] |
| Electrical Protection | actuators are double insulated |
| Quality Standard | ISO 9001 |
| Noise Level, Fail-Safe | 62 dB(A) |
| Agency Listing | cULus listed to UL60730-1A:02; UL 60730-2-14:02 and CAN/CSA-E60730-1:02; Listed to UL 2043 - suitable for use in air plenums per Section 300.22© of the NEC and Section 602.2 of the IMC |
| Shaft Diameter | ½…1.05” round, centers on ½” and ¾” with insert, 1.05” without insert |
| Fail-Safe Function | Spring return |
| Control Type Web | On/Off |
| Fail-Safe | YES |
Specifications
| SKU | CS2547167 |
|---|---|
| MPN | AFB24 |











