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LiftMaster GH


The Model GH is a heavy industrial-duty gear-reduced hoist door opener, as manufactured by The Chamberlain Group, Inc. and is for use on vertical or high lift sectional doors, rolling doors and grilles. It is rated for 25 cycles per hour constant high loading. In excess of 90 cycles/day.



  • Drive system : chain hoist
  • Voltage/phase :
    115/230 v 1 ph
    208/230/460 3 ph
    575 3 ph
  • Class 2 Circuit with 40 VA transformer
  • Horse power : available in ½, ¾, 1, 1½, 2, 3 and 5 HP. 
  • Minimum sideroom required: 20"
  • Control Circuit : -Logic 4.0 Control Board (L4) Available on 115V, 208/230V, 460V and 575V
  • Floor level chain hoist with electrical interlok for emergency manual door operation
  • High-starting torque continuous-duty motor ith overload protection
  • Heavy-duty wormgear-in-oil-bath peed reducer
  • 3-button control
  • Hoist wheel is easily moved to Right of Left hand side of unit eleminating the need to order letf or right mounting
  • Solenoid brake, standard
  • 5V DC (L4) NEC Class 2 contol circuit
  • C2 is a factory default setting; B2 easily field set using the Selector Dial
    (requires CPS-U,CPS-UN4 or CPS-EI)
  • Prewired to accept sensing devices (see Sensing Devices - Safety Accessories)
  • External radio control terminal
  • Fully adjustable linear-driven limit mechanism
  • Motor removable without affecting limit settings
  • NEMA 1 type electrical encloure
  • 50B40 door sprocket and #50 drive chain - standard on 1/2 thru 1 HP models 
  • 50B60 door sprocket and #50 drive chain - standard on 1-1/2 thru 2 HP models 
  • 80B60 1 3/4" diameter with 3/8 keyway  door sprocket and #80 drive chain - standard on 3 HP models
  • Baked-on high-durability black powdercoat finish
  • Door speed approximately 8 to 9 inche per second
  • Approximate shipping weight - 125lbs

Your security, our priority!

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.


Optional accessories for the LiftMaster MH door opener

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.

Mushroom Button Control Station


Red/Green Traffic light


3-Button Remote Control (813LM)


3-Buttons Premium Remote Control (895MAX)

Now it's easy to find the right button on your remote control, even in the dark. The sleek design of the 3-Button Premium Remote Control from LiftMaster® includes bright blue LED buttons for easy night operation. Another convenience feature is its built-in MyQ™ enabled technology that allows you to control up to three LiftMaster® garage door openers or gate operators, or MyQ™ enabled light accessories. And for added security, it is equipped with Security+2.0™ rolling code technology that uses a new code at every click, making it virtually impossible for anyone to steal your remote control signal. 

3-Button Visor Remote Control (893MAX)


3-Button Mini Remote Control (890MAX)

If you're always on the go, the LiftMaster® 3-Button Mini Remote Control will fit your busy lifestyle. It's small enough to fit right on your keychain, or in your purse or pocket, so you'll always have it when you come home. It can control up to three garage door openers or gate operators, or MyQ™ enabled light accessories. For added safety, it features Security+2.0™ rolling code technology that virtually eliminates interference and sends a brand new code every time it is used.

Wireless Keyless Entry System (877MAX)

Open or close your garage door without using a remote control or key. The LiftMaster®  Wireless Keyless Entry System can open the door using a private 4-digit code you program directly into the unit. You can also program it with temporary access codes for visitors or delivery and service personnel so they can gain access to your garage without having to give them your personal code. Plus, it works with all LiftMaster®  garage door openers manufactured since January 1993.

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.  

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.

(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. 


Rolling Door Interlock Switch

Interlock switch disables the operator control circuit when a manual door lock is engaged, preventing damage to the door and operator.

Chain tensioner (Standard with each commercial operator at GARAGA)

For 1" shafts. Recommended to properly tension drive chain between operator shaft and door shaft.

(71-6125) Same as 71-6023, but for 1-¼" shafts.


Antenna Extension Kit

The antenna extension kit can be used with EXT-ANT for maximum radio receiver range.

86LM (15')




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