The Honeywell MS4104F1010 is a high-performance Fast-Acting Two-Position Actuator engineered specifically for fire and smoke damper applications. Designed as a direct coupled actuator (DCA), it provides 30 lb-in of torque and is fully compliant with UL555 and UL555S standards for operation in temperatures up to 350°F. This 120 Vac spring return actuator utilizes a reliable SPST control signal, ensuring the damper returns to its fail-safe position during power loss or smoke detection. The rugged die-cast aluminum housing and NEMA 1 rating make it a staple for contractors replacing obsolete units like the H2000-8A, ML4115A1017, and ML4202F1000. With a 95-degree stroke and a 1/2-inch round shaft, it offers reversible mounting for either clockwise or counterclockwise rotation, providing the flexibility needed for demanding field retrofits. This Honeywell fire smoke actuator operates with a 15-second timing for both driving and spring return, maintaining safety without requiring complex limit switches or special cycling during long-term holding. High-Temperature Durability: Tested to meet UL555S specifications, maintaining integrity for 30 minutes at 350°F during emergency excursions. Universal Replacement: Serves as the primary Honeywell MS4104F1010 direct replacement for several legacy models, including the H2000 and ML4115 series. Efficient Performance: Features a fast-acting 15-second return and a patent-pending design that reduces power consumption during holding cycles. Contractor-Friendly Install: The reversible mounting and 32-inch color-coded leads streamline installation on various damper shaft configurations. Common Questions What is the fail-safe response time for the MS4104F1010? This actuator features a 15-second spring return timing, ensuring rapid damper closure to prevent the spread of smoke and fire. Does this model support 24V or 230V systems? No, the Honeywell MS4104F1010 is specifically a 120 Vac model. For 24V applications, you would typically look at the MS8104 series. Is an auxiliary switch included with this unit? Standard MS4104F1010 models do not include internal auxiliary switches. If position-indicating switches are required (7° and 85° stroke), verify the specific sub-model suffix before installation. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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