Valemo VDM10B, 24 VAC General Purpose Spring Return Damper Motor Actuator , Replace Honeywell M847D & other damper Actuators (see more below), with adjustable stopper.

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Valemo VDM10B, Spring Return Damper Actuator & Motor with Adjustable Stop on Power Open for Bleeding, Replacement Damper Motor Actuator for Honeywell ARD ZD M847D & Similar Actuato rs, 24VAC, No Switch VDM10B 2-wire Spring return damper actuator motor is designed to be compatible with and drop-in replacement for following models:Honeywell's M847D, M847D1004, and old ARD and ZD series of damper motors.DuroZone #35105 damper Motor.Zone First, EWC, and Erie, and other 2-wire damper actuators. Most reliable and trusted choice on Amazon since 2013.Well tested, no-hassle installation, most popular purchases by home owners as well as contractors.Longest 3-Year Warranty available online. Extra unique feature: Adjustable operating angle 60 to 90 degrees, allowing partial close (air bleed when necessary).To be Used in either HVAC air ducts, or venting installations. Tested to last 15+ years. Heavy-duty motor with all METAL gears inside, stainless steel housing. Input Power: 24 VAC, 50/60 Hz.Direct coupling to 5/16" damper shaft.Comes with detailed installation manual. User Manual / Specification (PDF) Show more