LiftMaster T T- Mechanical New style with thermal overload Manual - Page 6

ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL) NOTICE SENSING EDGES & PHOTO EYES WARNING Sensing devices supplied for door industry type operators WARNING with an isolated normally open (N.O.) output are compatible with your operator. This includes pneumatic IT IS STRONGLY RECOMMENDED THAT A SAFETY PHOTO EYE OR SENSING EDGE BE USED IN and electric edges, and through beam and retro reflective CONJUNCTION WITH THE OPERATOR. photo eyes. If your door does not have a bottom sensing edge or safety photo eyes and you wish to add a safety device to your application, please contact your local LiftMaster Authorized Dealer. CAUTION WARNING If not pre-installed by the door manufacturer, mount the sensing edge on the door according to the instructions WIRING: For wiring of your sensing device to the operator, refer to the wiring diagram supplied with your operator. provided with the edge. The sensing edge may be See field connection terminals identified as Sensing electrically connected by either coiled cord or take-up reel. Device or Safety Edge. Refer to the steps below. Important Notes: a) Proceed with Limit Switch Adjustments before making any sensing edge wiring connections to operator as described below. b) Electrician must hardwire the junction box to the operator electrical box in accordance with local codes. TAKE-UP REEL: Take-up reel should be installed 12" 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. LIMIT SWITCH ADJUSTMENT MAKE SURE THE LIMIT NUTS ARE POSITIONED BETWEEN THE LIMIT SWITCH ACTUATORS BEFORE PROCEEDING WITH ADJUSTMENTS. 1. To adjust limit nuts depress retaining plate to allow nut to spin freely. After adjustment, release plate and ensure it seats fully in slots of both nuts. 2. To increase door travel, spin nut away from actuator. To decrease door travel, spin limit nut toward actuator. 3. Adjust open limit nut so that door will stop in open position with the bottom of the door even with top of door opening. 4. Repeat Steps 1 and 2 for close cycle. Adjust close limit nut so that actuator is engaged as door fully seats at the floor. WARNING TO AVOID SERIOUS PERSONAL INJURY OR DEATH FROM ELECTROCUTION, DISCONNECT ELECTRIC POWER BEFORE MANUALLY MOVING LIMIT NUTS. If other problems persist, call our toll-free number for assistance: 1-800-528-2806. CLOSE Limit Switch OPEN Limit Switch Actuator SAFETY (Aux. Close) Limit Switch Retaining Plate (Aux. Open) Limit Switch 6