LiftMaster MGJ MGJ Manual - Page 8

I N S TA L L AT I O N MANUAL OPERATION This operator is equipped with a floor level disconnect chain to allow for manual operation of the door in case of emergency or power failure. MODEL MGJ 1. To disengage, pull the sash 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. WARNING To prevent possible SERIOUS INJURY from a moving chain, CAUTION DISCONNECT electric power to the operator BEFORE manually operating your door. MGJ 2. The door may now be pushed up or pulled down manually or if equipped with manual hand chain hoist (model MGH only), door can be raised or lowered with hand chain. Release the disconnect chain to operate the door again electrically. MODEL MGH 1. Pull the disconnect chain (small chain) to engage the interlock to disable the controls. The disconnect chain may be locked in position by slipping the end through the keyhole of the chain keeper 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 (large chain). 3. The disconnect chain must be released from the chain keeper before the door will operate again electrically. MGH Keyhole Bracket AVERTISSEMENT ATTENTION Chain Keeper (with pad locking provisions) ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL) SENSING EDGES All types of sensing edges with an isolated normally open (N.O.) output are compatible with your operator. This includes pneumatic and electric edges. If your door does not have a bottom sensing edge and you wish to purchase one, contact the supplier of your operator. ADWVAERRNTIENNGCIA To reduce the risk of SEVERE INJURY or DEATH, ALWAYS CAUTION install reversing sensors when the 3-button control station is PRECAUCIÓN out of sight of door or ANY other control (automatic or manual) is used. Reversing devices are recommended for ALL installations. If not pre-installed by the door manufacturer, mount the sensing edge on the door according to the instructions provided with the edge. The sensing edge may be electrically connected by either coiled cord or take-up reel. Refer to the steps below. IMPORTANT NOTES: a. Proceed with Limit Switch Adjustments described below before making any sensing edge wiring connections to operator. b. Electrician must hard wire the junction box to the operator electrical box in accordance with local codes. TAKE-UP REEL Take-up reel should be installed 12" (30.48 cm) above the top of the door. COIL CORD Connect operator end of coil cord to junction box (not provided) fastened to the wall approximately halfway up the door opening. AVERTISSEMENT 8 ATTENTION