Belimo AFR24-3 US AFR Series Damper Actuator, 133 in-lb, 24 VAC VDC [New]

$278 USD

Request Formal Quote

. . . . . Application - For modulating or on-off 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 crankarm and several mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft. Control is floating point from a triac or relay, or on-off from an auxiliary contact from a fan motor contactor, controller, or manual switch. The AFR24-3-S US is constructed to meet the requirements for Double Insulated devices. These units do not require a ground connection to meet electrical code requirements. Operation - The AFR 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. The AFR series provides 95??? of rotation and is provided with a graduated position indicator showing -5??? to 90???. The AFR series actuators are shipped in the zero position (5??? from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off. When power is applied to the AFR series its ?"one time use?" mechanism is released. The AFR 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. 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 AFR24-3-S version is provided with 1 built-in auxiliary switch. This SPDT switch is provided for safety interfacing or signaling, for example, for f. Belimo. Belimo. AFR24-3 US.