LiftMaster 3900 electric garage door opener
LiftMaster Logo

3900

LiftMaster logo

3900

LiftMaster 3900 electric garage door opener

Features

The Model 3900 is a jackshaft door opener, as manufactured by The Chamberlain Group, Inc. and is for use on light-duty commercial standard, vertical and high lift sectional doors with torsion assemblies. It is rated up to 10 cycles per hour during peak periods. It features a compact design ideal for limited height, cathedral, or obstructed ceiling installations.

  • Jackshaft door operator
  • Motor: Heavy-duty 24 Volts DC with variable speed smooth start and stop
  • Single phase: 115 V
  • Wall-mount installation: mounts on the left or right side of door. No rails to hang, the operator simply mounts on the wall and attaches to the door torsion bar. Unit requires an electrical outlet within 6 ft (1.83 m)
  • Quick-ConnectTM terminals for faster wire installation
  • Patented absolute positioning technology: The newest technology in commercial door openers. This patented design allows the electronic limits to be extremely accurate, even after a power failure.
  • Maximum door weight: 650 lb (295 kg)
  • Minimum side room required: 14 in (36 cm)
  • UL and CSA listed.
  • Requirements: for doors up to 14 ft (4.3 m) high, 18 ft (5.5 m) wide or 180 ft2 (16.6 m2) maximum
  • 2-year motor warranty.

Standard security systems

Your security, our priority!

The Protector System®

Project an invisible light beam across the garage door opening and automatically reverse the door if anything interrupts the beam while the door is going down. Sensing technology will stop the door from closing if contact is made with a person or object. Opener light turns on automatically when The Protector System's infrared beam is broken.

LiftMaster protector system (41A5034)

Security+®

Security+® rolling code technology assures a new code is sent every time the remote control is used.

Standard Security plus

Cable tension monitor

Specifically designed to maintain accurate tension and eliminate "cable throw", which occurs when the cable slips off the drum.

Cable tension monitor

Warning

Garage doors and garage door openers can be dangerous if not installed and verified by a professional and not used properly. Children must be supervised by an adult when they are inside or in proximity of the garage.

The Protector System®

LiftMaster protector system (41A5034)

Project an invisible light beam across the garage door opening and automatically reverse the door if anything interrupts the beam while the door is going down. Sensing technology will stop the door from closing if contact is made with a person or object. Opener light turns on automatically when The Protector System's infrared beam is broken.


Security+®

Standard Security plus

Security+® rolling code technology assures a new code is sent every time the remote control is used.


Cable tension monitor

Cable tension monitor

Specifically designed to maintain accurate tension and eliminate "cable throw", which occurs when the cable slips off the drum.


Warning

Garage doors and garage door openers can be dangerous if not installed and verified by a professional and not used properly. Children must be supervised by an adult when they are inside or in proximity of the garage.

Included in package

LiftMaster 3900 electric garage door opener
LiftMaster 3900 electric garage door opener
button station
Single button control station
Cable tension monitor
Cable tension monitor
Protector System - (41A5034)
Protector system (41A5034)

* Also included: a hardware bag for installation (includes all necessary hardware for installation)