LiftMaster GH GH LOGIC VERSION 2 Manual - Page 7

ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL) CONT'D PHOTO EYES & SENSING EDGES Sensing devices supplied for door industry type operators NOTICE with an isolated normally open (N.O.) dry contact output are compatible with your operator. This includes through beam and retro reflective photo eyes, and pneumatic and electric edges. If your door does not have bottom safety IT IS STRONGLY RECOMMENDED THAT A SAFETY PHOTO EYE OR SENSING EDGE BE USED IN CONJUNCTION WITH THE OPERATOR. photo eyes or a sensing edge and you wish to add a safe- ty device to your application, please contact your local WIRING: For wiring of your sensing device to the LiftMaster Authorized Dealer. operator, refer to the wiring diagram on pages 11-13. See field connection terminals identified as Reversing Device. If not pre-installed by the door manufacturer, mount the sensing edge on the door according to the instructions pro- vided with the edge. The sensing edge may be electrical- TAKE-UP REEL: Take-up reel should be installed 12" ly connected by either coiled cord or take-up reel. above the top of the door. Important Notes: COIL CORD: Connect operator end of coil cord to a) Proceed with Limit Switch Adjustments before making junction box (not supplied) fastened to the wall any sensing edge wiring connections to operator as approximately halfway up the door opening. described below. 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 POWER BEFORE MANUALLY MOVING LIMIT NUTS. If other problems persist, call our toll-free number for CAUTION assistance - 1-800-528-2806. CLOSE Limit Switch OPEN Limit Switch Actuator WA SAFETY (Aux. Close) Limit Switch 7 Retaining Plate