MH5011: 1/2 HP Medium Duty Jackshaft Commercial Door Operator

The Nortek Security & Control Family of Brands

Technical Bulletin (06-28-2012)
Installation and Owner’s Manual –
(Post 2010 UL requirements)
Flyer/Architectural Spec
Fraba Safety Devices Brochure

The Model MH5011 is a 1/2 HP, 115-volt, medium duty jackshaft commercial door operator (for rolling steel curtain doors) with chain hoist and floor level disconnect. Not to exceed 10 cycles per hour, maximum 75 cycles per day.


  • 115 VAC, Single phase, 1/2 HP
  • Maximum duty cycle: 10 cycles per hour, 75 cycles per day
  • Maximum door height: 14 feet


  • Solid state control circuit¬†
  • Constant pressure required to close if no entrapment devices are installed¬†
  • Solenoid brake standard
  • All steel frame
  • V-Belt drive from motor to clutch shaft
  • Adjustable friction clutch
  • Floor level disconnect for manual door operation and chain hoist with interlock
  • Manual operation will not affect limit switch settings
  • 41B30 door sprocket and #41 drive chain supplied
  • Standard door speed is approximately 11 inches per second
  • Motor overload protection
  • Wired to accept reversing devices
  • Internally adjustable limit switches
  • 1/2 HP rigid base permanent split capacitor motor
  • 24-Volt control circuit with OPEN, CLOSE and STOP 3-button station
  • OPEN button (and single button) will automatically override down travel and reverse door to the full open position
  • External terminals for single button (residential type) radio control

Common Options

  • Linear Photo Beam Kit: HAE00056
  • MVP-MR 3-channel open-close-stop modular receiver installed: P/N 2650-159


  • 2 years
MH50111/2115V 1PJackshaft
Chain hoist with interlock and Floor level disconnect
14 FT.