User manual CHAMBERLAIN 7806CB

[. . . ] ® WARNING OWNER'S INSTRUCTIONS Model 7806CB EIGHT-FOOT SCREW DRIVE RAIL EXTENSION KIT WARNING CAUTION WARNING To prevent possible SERIOUS INJURY or DEATH: · Be sure door is CLOSED and · Disconnect power to opener before proceeding. This kit should be installed prior to installation of your garage door opener. [. . . ] Remove the rail brackets at the end of the existing rail and set aside (Figure 1). Connect the extension rail to the end of rail (Figure 2): · Secure rails together with braces and bolts. Reattach the rail brackets to the end of the extension rail. Replace the emergency release rope that came with the opener with the new, longer replacement rope. Install the opener following the instructions in your owner's manual, but stop before connecting the door arm to the outer trolley. Reposition the inner trolley as follows: · Pull the emergency release handle to disconnect the outer trolley from the inner trolley. · Connect power to the opener (be sure the safety reverse sensor is connected). · Refer to the Adjustment Section in your opener's manual, and adjust the travel limits until the inner trolley is about 3/4" (19 mm) from the rail joint (Figure 3). [. . . ] Reposition the inner trolley. Inner Trolley position after adjustment Disconnected Rail Support Brace Outer Trolley Header Wall Extension Rail 3/4" (19 mm) NOT ICE Inner Trolley position before adjustment 114A3369 © 2007, The Chamberlain Group, Inc. [. . . ]