{"product_id":"honeywell-ms7103a1021-u-damper-actuator-27-in-lb-24-vac","title":"Honeywell ms7103a1021\/u Damper Actuator 27 In-lb 24 Vac","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HONEYWELL ms7103a1021\/u is a direct-coupled spring-return damper actuator designed for precise analog control of HVAC dampers in commercial and residential air-handling systems. It operates on a 24 VAC supply and accepts a 2-10 VDC analog control signal for proportional positioning. The actuator delivers 27 inch-pounds of torque and draws 4 VA, making it well-suited for modulating damper applications where fail-safe return-to-position is required. A self-centering shaft adapter is included, simplifying installation across a range of damper shaft sizes without the need for additional adapters.\u003c\/p\u003e\u003cp\u003eThis actuator is used in variable air volume (VAV) systems, mixed-air damper assemblies, and zone control applications where proportional damper positioning is needed. The spring-return mechanism ensures the damper moves to a defined safe position on loss of power, a critical requirement in many commercial HVAC designs. Licensed HVAC technicians typically install this unit as part of a building automation or direct digital control (DDC) system. It is appropriate for both new construction and retrofit installations where a low-voltage analog actuator is specified.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e27 inch-pounds of output torque for reliable damper engagement\u003c\/li\u003e\n\u003cli\u003eSpring-return fail-safe operation returns damper to defined position on power loss\u003c\/li\u003e\n\u003cli\u003e2-10 VDC analog control signal for proportional modulation\u003c\/li\u003e\n\u003cli\u003e24 VAC nominal supply voltage at 4 VA power draw\u003c\/li\u003e\n\u003cli\u003eDirect-coupled mounting eliminates linkage hardware\u003c\/li\u003e\n\u003cli\u003eSelf-centering shaft adapter accommodates a range of shaft sizes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation actuator for direct-coupled damper applications requiring 24 VAC analog proportional control in commercial and residential HVAC systems.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed HVAC technician familiar with low-voltage control wiring and building automation systems. Disconnect and lock out power to the air-handling unit and control panel before mounting or wiring the actuator. The direct-coupled design clamps directly onto the damper shaft — no crank arm or linkage is required. Verify control signal polarity and voltage range at the DDC output before applying power to avoid actuator damage.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupply Voltage (Nominal)\u003c\/strong\u003e: 24 VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Draw\u003c\/strong\u003e: 4 VA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput Torque\u003c\/strong\u003e: 27 inch-pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControl Signal\u003c\/strong\u003e: Analog 2-10 VDC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReturn Type\u003c\/strong\u003e: Spring Return\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type\u003c\/strong\u003e: Direct Coupled\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HONEYWELL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: ms7103a1021\/u\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HONEYWELL","offers":[{"title":"Default Title","offer_id":51268856971570,"sku":"MS7103A1021\/U","price":313.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/308909954.png?v=1780707765","url":"https:\/\/voomisupply.com\/products\/honeywell-ms7103a1021-u-damper-actuator-27-in-lb-24-vac","provider":"Voomi Supply","version":"1.0","type":"link"}