LiftMaster GH GH -Mechanical New style w/ thermal overload change Manual - Page 8

I N S TA L L AT I O N ENTRAPMENT PROTECTION ACCESSORIES (OPTIONAL) PHOTO EYES & SENSING EDGES Sensing devices provided for door industry type operators with an isolated normally open (N.O.) dry contact output are compatible with your operator. This includes pneumatic and electric edges, and through beam and retro reflective photo eyes. If you would like to order or receive more information on safety devices, please contact your local Authorized Dealer. 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. WARNING To reduce the risk of SEVERE INJURY or DEATH, ALWAYS CAUTION install reversing sensors when the 3-button control station is out of sight of door or ANY other control (automatic or manual) is used. Reversing devices are recommended for ALL installations. WIRING For wiring of your sensing device to the operator, refer to the wiring diagrams provided on pages 13 and 14. See field connection terminals identified as sensing device or safety edge. IMPORTANT NOTES: a. Proceed with limit switch adjustments described below before making any sensing edge wiring connections to operator. 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" (30.48 cm) above the top of the door. AVERTISSEMENT COIL CORD Connect operator end of coil cord to junction box (not provided) ATTENTION fastened to the wall approximately halfway up the door opening. WARNING ADJUSTMENT WARNING LIMICT SAWUITCTHIOADNJUSTMENT NOTE: Make sure the limit nuts are positioned between the limit switches before proceeding with adjustments. 1. Depress retaining plate to allow nut to spin freely. After adjustment, release plate and move nut back and forth to ensure it is fully seated in slot. 2. To increase door travel, spin nut away from limit switch. To decrease door travel, spin limit nut toward limit switch. 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 the limit switch 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. AVERTISSEMENT AAVEDRVTEIRSOPTSENEELimNMit SCwEitcIhNAT CLOSE Limit Switch ATTENTION PARVEECRATUISACctSuaItoEÓr MNENT SAFETY (Aux. Close) Limit Switch 8 Retaining Plate SAFETY (Aux. Open) Limit Switch