LiftMaster GT

lisftmaster gt opener


The Model GT is a heavy industrial-duty trolley door opener, as manufactured by The Chamberlain Group, Inc. and is for use on standard lift sectional doors. It is rated for 25 cycles per hour constant high loading. In excess of 90 cycles/day.

    • Trolley Type Door Opener


  • Voltage/phase :
    115/230V 1 phase
    208/230/460V 3 phase
    575V 3 phase

Class 2 Circuit with 40 VA transformer


    • Horsepower : available in ½, ¾ and 1 HP.


  • Additional headroom required: 4″


  • Required depth : Door height + 48”


  • Built-in 3-channel, 315MHz radio receiver accepts up to 23 Security+® or unlimited DIP switch remotes. 3-button remotes can be programmed for OPEN/CLOSE/STOP operation


  • Maintenance Alert System™ establishes a routine maintenance schedule based on the number of cycles or calendar date. Includes self-diagnostic system that allows you to troubleshoot up to eight different error codes


  • Timer-to-Close allows programming in 1-sec or 15-sec increments and permits timed automatic door closure after the door reaches the full open position; requires monitored photo sensors, either CPS-U, CPS-UN4, or a 4-wire edge, using the CPS-EI edge interface


  • Thermal motor overload can be easily reset from the 3-button floor level control station


  • Continuous-duty high-starting torque motor with instant reverse.


  • Removable hinged electrical box cover.


  • Quiet-gliding rail spacers.


  • Single- or three-phase, capacitor start on single-phase.


  • Motor is removable without affecting limit switch settings.


  • All operators are factory preset to C2 wiring, providing momentary contact to open and stop, with constant contact to close. Monitored entrapment protection, using approved photo sensors or sensing edges is optional, although recommended, when using C2, D1 or E2. All other wiring types, B2, T, TS and FSTS, can be selected with the addition of an appropriate monitored entrapment protection device, either LiftMaster CPS-U / CPS-UN4 photo sensors or a monitored 4-wire sensing edge (via a CPS-EI Edge Interface Card). Logic 4.0 operators can only accept UL-approved LiftMaster CPS-U, CPS-UN4 or CPS-EI monitored entrapment protection devices.



  • 10:1 first stage using heavy-duty gears running in oil bath; cast iron housing; #41 chain second stage; #41 chain on trolley.
  • Sealed roller bearing in gear reducer.


  • Heavy-duty solenoid-actuated brake.


    • Adjustable friction clutch helps protect against major damage to door and operator should the door meet an obstruction.


    • Spring-loaded disconnect for emergency manual operation.


  • Motor overload protection.


    • High-strength dual L-rail track with exclusive nylon quiet-gliding chain guides on rail spacers for quiet, smooth operation.


  • 1.5 second delay-on-reverse circuit to prevent premature door and operator wear.


  • The Timer-to-Close automatically closes the door – programmable in 1-second or 15-second increments.


  • The mid-stop stops the door at programmable mid-stop during open travel.


  • The Maximum Run Timer signals the door to reverse or stop if closing time exceeds maximum by more than 10 seconds.


  • Maintenance alert system (5 000 to 10 000 cycles).


  • UL and CSA listed.


  • 2-year warranty.



CPS® Commercial Protector System® 


The presence of primary entrapment protection is standard CPS-U for all modes. Primary entrapment protection devices are monitored continuously to insure safe operation of the door and limit door opener functionality should an obstruction be detected or in the event of device failure. Optional LiftMaster Monitored Entrapment Protection devices, CPS-UN4, CPS-RPEN4 and CPS-EI, are designed to work in conjunction with LiftMaster commercial door openers to provide enhanced door safety and a broad range of modes and features to end users. Either monitored photo-sensor or monitored 4-wire sensing edge (in conjunction with the CPS-EI Edge Interface) protection may be selected, but one must be detected by the LiftMaster Logic 4.0 or Medium-Duty Logic circuit board in order to unlock full functionality.


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



    • LiftMaster GT door opener gearhead trolley door operator


    • 3-Button control station with LED


    • Radio receiver & external radio control terminal


    • Chain pack (according to door height)


    • Installation hardware


  • Rail according to door height



LiftMaster Internet Gateway™ (828LM)

This revolutionary new accessory features built-in MyQ™ technology that connects to the Internet and allows you to monitor and operate your garage door opener, or turn on or off lights in or around your home, from anywhere in the world by using your smartphone or computer. It utilizes a two-way communication system that puts freedom and control in your hands.

828lm internet gateway

828LM LiftMaster Internet Gateway

3-Button Visor Remote Control (893MAX)

This powerful multi-door control can operate up to 3 garage door openers, gate operators, or MyQ® enabled light accessories. Plus, it’s compatible with all LiftMaster® garage door openers manufactured since 1993.

3 button remote

3-Button Mini Remote Control (893LM)

Mushroom Button Control Station

Mushroom Button Control Station

Red/Green Traffic light

Indicates gate or door position. Provides assurance of safe entering and exiting of the facility, reducing the potential for costly accidents.

red_green light RGL24LY

Red / Green Traffic Light RGL24LY

3-Button Remote Control (813LM)

  • Features Security+ 2.0® technology
  • Ideal for applications such as gated communities or commercial applications requiring a large number of remotes for a common entrance
  • Dual 12-position DIP programming offers up to 4,096 codes
  • May also be programmed for Open/Close/Stop functionality
  • Narrow band transmission on 3 simultaneous frequencies (310, 315, 390 MHz)
  • Compatible only with Security+ 2.0® commercial receivers and operators

3-botton remote control

813LM 3-Button Remote Control

Mini 3-Button Remote Control 315MHz (890MAX)

Are you always on the go? Our mini 3-button remote control is a miniature version of our 3-button remote control, and just as powerful. It can open and close 3 garage doors or gates, turn opener lights on/off, and/or turn on lights and small appliances in your home. And the best part is that it can fit almost anywhere – in your purse, your pocket, or even on your keychain.Get control on the go. Our mini 3-button remote control is small enough to fit in your purse, in your pocket, or on your keychain, and can operate 3 garage door openers or gates, or lights and small appliances.

3 button 890 max

3-Button Mini Remote (890MAX)

Wireless Keyless Entry System 315MHz (377LM)

Access your garage and home without the use of a key or a remote control. The LiftMaster® Security+® Wireless Keyless Entry can open your garage door using a code that you program directly into the unit. There is also a temporary password option that enables family, friends, or service people to enter the garage/your home without giving them your personal code.

• Backlit keypad which makes numbers easy to see, even in the dark.


• One-button-to-close feature makes it easier than ever to close your garage door.


877 keyless entry system

Wireless Keyless Entry System (877)


Commercial Protector System® (CPS-UN4)


 CPS-RPEN4 Retro-Reflective Photo Eye makes installs faster and simpler, by only having wiring on one side of door and Reflector on the other. Range of 50 feet in most cases. NEMA-4 rated.

retro-reflective photo eye

Liftmaster CPS-RPEN4 Monitored Retro-Reflective Photo Eye

Sensing Edge

If CPS-U / CPS-UN4 photo sensors are present, a non-monitored 2-wire electric edge or pneumatic (air hose) edge may be used as ancillary protection devices.

Vehicle detection system

(65-8202) Pneumatic Sensing Edge Kit with exterior air switch, 2-wire coil cord and 14′ air hose.(65-5202) Pneumatic Sensing Edge Kit with exterior air switch, 2-wire  take-up reel (20′ extended) and 14′ air hose.

Antenna Extension Kit

The antenna extension kit can be used with EXT-ANT for maximum radio receiver range.86LM (15′)86LMT(25′)
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