LiftMaster MJ MJ (BLACK LINE) Manual - Page 5

7. Install Hand Chain (Models MH and HMJ only) Place hand chain around hand chain wheel. Be sure to pass it through both openings in the chain guide. Remove enough links so chain hangs approximately two feet above the floor 8. Mount Chain Keeper / Keyhole Bracket Using suitable hardware mount the chain keeper approximately 4 feet above the floor, near the free hanging chain. Remove disconnect sash chain from bag and place the end through the keyhole in the the chain keeper. Remove excess links if necessary. MANUAL OPERATION This operator has provisions for manually operating the door in case of emergency or power failure. Refer to the appropriate instructions below for your model operator. 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 (small chain) to engage the hoist mechanism. The disconnect chain may be locked in position by slipping the end through the keyhole of the chain keeper mounted on the wall. WARNING To prevent possible SERIOUS INJURY from a moving chain, CAUTION DISCONNECT electric power to the operator BEFORE manually operating your door. 2. Operate the door in the desired direction by pulling on one side or the other of the continuous loop hoist chain (large chain). Chain Retaining Bracket (with pad locking provisions) 3. The disconnect chain must be released from the chain keeper before the door will operate again electrically. Model MJ This operator has a floor level disconnect chain to disconnect the door from the door operator. 1. To disengage, pull the chain and secure in the disengaged position by slipping the end through the keyhole bracket mounted on the wall. Or if emergency egress device is used, pull handle to disengage operator from door. 2. The door may now be pushed up or pulled down manually. Release the disconnect chain to operate the door again electrically. Electrical Interlock with Hoist for Models MH and HMJ Keyhole Bracket Model HMJ This operator includes both a floor level disconnect chain to disconnect the door from the door operator and a disconnect chain with manual hoist to electrically disable the operator controls. 1. Refer to Model MH instructions above for hoist operation. 2. Refer to Model MJ instructions above for manual operation. 5 Manual Disconnect for Models MJ and HMJ