Honeywell MS8104F1010 Actuator

The Honeywell MS8104F1010 Actuator is a fast-acting two-position actuator engineered specifically for critical fire and smoke damper applications. As a direct coupled actuator (DCA), it provides a reliable spring return safety mechanism, ensuring dampers transition to a fail-safe position during power loss or thermal events. Operating on 24Vac, this unit delivers a consistent 30 lb-in torque and is UL555S rated to withstand temperatures up to 350°F. The reversible mounting design allows for either clockwise (CW) or counter-clockwise (CCW) rotation, making it a versatile damper actuator replacement for legacy models like the ML8115B1012 and H2024B-3. With a 95-degree stroke and a 15-second survival-critical drive/return time, this Honeywell fire and smoke actuator ensures high-speed response in HVAC life safety systems. The 1/2" round shaft adapter and die-cast aluminum housing provide a rugged, NEMA 1 rated solution for professional HVACR contractors managing high-performance smoke control sequences.

• Direct Replacement: Seamlessly replaces ML8115B1012 and Ruskin H2024B-3 models without extensive linkage adjustments.
• Rapid Response: Features a fast-acting 15-second drive and spring return timing for optimal smoke control system performance.
• High-Temperature Durability: Specifically UL555S rated for 350°F to ensure reliability during fire-safety excursions.
• Field Versatility: Reversible mounting simplifies installation for both CW and CCW spring rotation requirements.
• Energy Efficient: Patented design reduces power consumption during long-term holding without requiring limit switches.

What is the primary application for the MS8104F1010?
This 24V spring return actuator is designed for on/off control of fire and smoke dampers in HVAC systems, requiring high-speed fail-safe operation.

Can this unit replace the ML8115B1012?
Yes, the MS8104F1010 is the manufacturer-designated direct replacement for the Honeywell ML8115B1012 and provides equivalent torque and timing specs.

Does it support both clockwise and counter-clockwise rotation?
Correct. The reversible mounting and dual-slotted housing allow the actuator to be flipped for either CW or CCW spring rotation on a 1/2" round shaft.

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.