User manual LIFT-MASTER M75

[. . . ] 845 Larch Avenue Elmhurst, Illinois 60126-1196 www. chamberlaingroup. com ® GARAGE DOOR OPENER For Residential Use Only Model M75 - 1/2HP Owner's Manual Please read this manual and the enclosed safety materials carefully!Fasten the manual near the garage door after installation. The door WILL NOT CLOSE unless the Protector System® is connected and properly aligned. Periodic checks of the opener are required to ensure safe operation. [. . . ] If the arm is behind the connector hole, adjust the limit further. One full turn equals 2" of trolley travel. Connect the door arm to the trolley: · Close the door and join the curved arm to the connector hole in the trolley with the remaining clevis pin. It may be necessary to lift the door slightly to make the connection. · Run the opener through a complete travel cycle. If the door has a slight "backward" slant in full open position as shown in the illustration, decrease the UP limit until the door is parallel to the floor. NOTE: When setting the up limit on the following page, the door should not have a "backward" slant when fully open as illustrated below. A slight backward slant will cause unnecessary bucking and/or jerking operation as the door is being opened or closed from the fully open position. Fully Closed Trolley Door Arm Connector Hole Door Arm Emergency Release Handle Closed Door Fully Open Trolley Correct Angle Door Arm Connector Hole Open Door Door with Backward Slant (Undesirable) Door Arm 23 ADJUSTMENT STEP 1 Adjust the UP and DOWN Travel Limits Limit adjustment settings regulate the points at which the door will stop when moving up or down. To operate the opener, press the Door Control push bar/button. Run the opener through a complete travel cycle. · Does the door open and close completely?· Does the door stay closed and not reverse unintentionally when fully closed?If your door passes both of these tests, no limit adjustments are necessary unless the reversing test fails (see Adjustment Step 3, page 26). Adjustment procedures are outlined below. Read the procedures carefully before proceeding to Adjustment Step 2. Use a screwdriver to make limit adjustments. Run the opener through a complete travel cycle after each adjustment. NOTE: Repeated operation of the opener during adjustment procedures may cause the motor to overheat and shut off. NOTE: If anything interferes with the door's upward travel, it will stop. If anything interferes with the door's downward travel (including binding or unbalanced doors), it will reverse. HOW AND WHEN TO ADJUST THE LIMITS · If the door does not open completely but opens at least five feet: Increase up travel. Turn the UP limit adjustment screw clockwise. [. . . ] - Sunday For professional installation, parts and service, contact your local CHAMBERLAIN/ACCESS MASTER dealer. Look for him in the Yellow Pages, or call our Service number for a list of dealers in your area. 1-800-528-2817 ACCESS MASTER GARAGE DOOR OPENER ONE-YEAR LIMITED WARRANTY Chamberlain/Access Master ("Seller") warrants, to the first retail purchaser of this product, for the residence in which this product is originally installed, that it will be free from any defect in materials and/or workmanship for a period of one year from the date of purchase. The product must be used in complete accordance with Chamberlain's instructions for installation, operation and care. The proper operation of this product is dependent on your compliance with the Owner's Manual instructions regarding installation, operation, maintenance and testing. [. . . ]