LiftMaster MGJ Medium-Duty Gear-Reduced Jackshaft Operator for Rolling Grilles and Shutters - Manual (Page 5)

The operators have provisions for manually operating the door in
case of emergency or power failure. Refer to the appropriate
instructions for your model operator.
MODEL MT/BMT
MODEL MH
These operators are equipped with a manual hoist. An electrical
interlock will disable the electrical controls when the hoist is used. To
operate the hoist:
1. Pull the disconnect chain (sash chain) to engage the hoist
mechanism. The disconnect chain may be locked in position by
slipping the end through the keyhole of the chain retaining bracket
mounted on the wall.
2. Operate the door in the desired direction by pulling on one side or
the other of the continuous loop hoist chain.
3. The disconnect chain must be released from the chain retaining
bracket before the door will operate again electrically.
Electrical Interlock with Hoist for Model MH
Chain Retaining Bracket
(with pad locking provisions)
NO
E C I T
To prevent possible SERIOUS INJURY or DEATH from a falling
door or arm:
• DO NOT stand under the door arm when pulling the emergency
release.
• If possible, use emergency release handle to disengage trolley
ONLY when door is CLOSED. Weak or broken springs or
unbalanced door could result in an open door falling rapidly and/
or unexpectedly.
• NEVER use emergency release handle unless doorway is clear of
persons and obstructions.
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION CAUTION
WARNING
WARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIA ADVERTENCIA
Emergency
Disconnect
Door
Emergency
Release Handle
Emergency
Disconnect Emergency
Disconnect
Door Arm
Door
Arm
Pull emergency
release handle
straight down.
Emergency
disconnect will
open.
Lift free end of door
arm to trolley. Pull
emergency handle
to allow arm to
engage roll pin.
Release handle.
Emergency
disconnect will
close.
TO DISCONNECT DOOR FROM OPENER TO RECONNECT DOOR ARM TO TROLLEY
M A N U A L D I S C O N N E C T ( M O D E L S M T / B M T & M H )
5