Description
Customizable Fail-Safe modulating actuator for controlling dampers in typical commercial HVAC applications. The AFX24-SR-S N4 series actuators provide true spring return operation for reliable fail-safe application and positive close off on airtight dampers. The spring return system provides constant torque to the damper with, and without, power applied to the actuator. The AFX24-SR-S N4 series provides 95° of rotation and is provided with a graduated position indicator showing 0° to 95°. The AFX24-SR-S N4 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 and to know the actuator’s exact failsafe position. 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. The AFX24-SR-S N4 versions are provided with two built-in auxiliary switches. These SPDT switches provide safety interfacing or signaling, for example, for fan start-up. The switching function at the fail-safe position is fixed at 10°, the other switch function is adjustable between 10° to 90°. The AFX24-SR-S N4 actuator is shipped at 5° (5° from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off. ATTENTION: AFX24-SR-S N4 cannot be tandem mounted on the same damper or valve shaft. Only On/Off and MFT AF.. models can be used for tandem mount applications. Installation Note: Use suitable flexible metallic conduit or its equivalent with the conduit fitting. Not suitable for plenum applications. For low ambient temperatures, the optional supplemental (-Y) Heater add-on is available.
Features:
- Torque motor 180 in-lb [20 Nm]
- Nominal voltage AC/DC 24 V
- Control Modulating
- Position feedback 2…10 V
- 2x SPDT
- NEMA 4X
Reviews
There are no reviews yet.