Honeywell M847D-VENT - Replacement Actuator for ARD, EARD and ZD zone dampers.

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The M847D is a two position, 24 Vac spring return actuator designed to operate ARD, EARD and ZD zone dampers.


  • Low voltage, spring-return damper actuator.
  • Equipped with anti-rotation and drive shaft extensions for direct mounting to 7/16 inch diameter coupling style dampers.
  • Adjustable range stops.
  • Direct replacement for M847D1004