LiftMaster T T MECHANICAL Manual - Page 6

ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL) SENSING EDGES & PHOTO EYES Sensing devices supplied for door industry type operators NOTICE with an isolated normally open (N.O.) output are compatible with your operator. This includes pneumatic and electric edges, and through beam and retro reflective photo eyes. If your door does not have a bottom sensing edge or IT IS STRONGLY RECOMMENDED THAT A SAFETY PHOTO EYE OR SENSING EDGE BE USED IN CONJUNCTION WITH THE OPERATOR. safety photo eyes and you wish to add a safety device to your application, please contact your local LiftMaster WIRING: Authorized Dealer. For wiring of your sensing device to the operator, refer to the wiring diagram supplied with your opera- If not pre-installed by the door manufacturer, mount the sensing edge on the door according to the instructions pro- tor. See field connection terminals identified as Sensing Device or Safety Edge. vided with the edge. The sensing edge may be electrical- ly connected by either coiled cord or take-up reel. Refer to TAKE-UP REEL: Take-up reel should be installed the steps below. 12" above the top of the door. Important Notes: a) Proceed with Limit Switch Adjustments before making any sensing edge wiring connections to operator as described below. COIL CORD: Connect operator end of coil cord to junction box (not supplied) fastened to the wall approximately halfway up the door opening. b) Electrician must hardwire the junction box to the operator electrical box in accordance with local codes. 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 If other problems persist, call our toll-free number for assistance - 1-800-528-2806. OPEN Limit Switch CLOSE Limit Switch Actuator SAFETY (Aux. Close) Limit Switch 6 Retaining Plate Aux. OPEN Limit Switch