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MH

Medium-Duty Hoist Operator is rated 4.5 out of 5 by 2.
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The Model MH Medium Duty Hoist Operator is designed for use on small rolling doors, grilles and industrial sectional doors with high or vertical lift.

All LiftMaster Openers, Operators, and Systems should be purchased through a Dealer and professionally installed.

Features

  • 115 volt 1 Ɵ.
  • With Open/Close/Stop functions, the three push-button control station is standard for all operators. Controls with one, two and three buttons are available.
  • Maintenance Alert System provides notifications when routine maintenance is required on your Commercial Door Operator.
  • With a powder-coated finish, the NEMA Type 1 electrical box construction is durable enough for most applications.
  • Heavy-duty, oil-filled bushings.
  • Mounts on the left or right side of the door. No rails to hang—the Door Operator simply mounts on the wall and attaches to the door shaft through chain and sprocket.
  • Door Operator electromechanical limit system enables ease of installation and adjustment to ensure accuracy, even after a power failure.
  • Programmable in one-second or 15-second increments, Time-to-Close automatically closes the door.
  • Ensure peace of mind with a LiftMaster two-year warranty.
  • Meets all UL 325 requirements.
  • Patented Security+® radio technology accepts 20 remote controls and unlimited DIP switch remote control.
  • Adjustable Friction Clutch helps protect against damage to the door and Door Operator should the door meet an obstruction.
  • Signals door to reverse or stop if closing time exceeds maximum door travel to prevent damage to door and Door Operator.
  • Provides easy emergency manual operation using an easily accessible disconnect.
  • Chain hoist electrically interlocked floor-level disconnect for manual operation. Specification of right or left-hand hoist may be required.
  • CPS-U Monitored Commercial Protector System.
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Documentation

Accessories

Rated 4 out of 5 by from Good lift small issues So I finish my new man cave with dual 10x10 commercial roll up doors, complete with Liftmaster medium duty lifts and remotes. Going to be the Corvette's new home so remotes were a must so I can drive right in. Had the doors professionally installed and Remotes programmed. Everything worked fine but you had to be 5 feet or closer for the remotes to work? That 's not going to work, I want to be able to open the doors while I'm sitting in a car. I did some research and see that this is a common problem and they suggest an external antenna. Ok fine I look on Liftmaster's for an external antenna kit. All I find are long units that mount yards away from the lift, not what I'm looking for. Go on Google and bam, they're everywhere, for like $20, I ordered two of them. All they are is a short six inch coax cable that plugs into the circuit board at one end and mounts to the logic case at the other. A foot long solid metal antenna then mounts to to the case mounted coax cable. Took me about an hour to install both antennas. WOW what a difference! The doors now respond at the edge of my property like they should. If you asked me Liftmaster should include these in with the lifts, not like they're expensive.... The circuit board already has the plug for the coax on it and the logic housing already has a special notched hole that exactly fits the coax cable mount. And to make matters worse you won't find it on Liftmaster's site so look elsewhere. Part number is EXT-ANT (go figure) and is made specifically for these medium duty lifts worked like a champ for me.
Date published: 2017-07-25
Rated 5 out of 5 by from Commercial Operators We use LiftMaster commercial operators almost exclusively. (except where specifier demands other products). My installation and service teams cringe when they have other products, LiftMaster products have less complicated installations, electronics, and ease of diagnostics makes them the preferred products of Lodi Garage Doors for years.
Date published: 2011-07-15
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