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Chamberlain 3850 manual 37

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37

Contents

For Residential Use Only Introduction2-5 Assembly Installation7-22 Adjustment Operation26-31 Preparing your garage door Tools needed Planning Carton Inventory Attach the Rail to the Motor Unit Set the Belt Tension Attach the Belt Cap Retainer Determine the Header Bracket Location Install the Header Bracket Attach the Rail to the Header Bracket Position the Opener Hang the Opener Install the Control Console Install the Battery Backup (Optional) Install the Lights Attach the Emergency Release Rope and Handle Electrical Requirements Install The Protector System® Page MOUNTING AND WIRING THE SAFETY REVERSING SENSORS ALIGNING THE SAFETY REVERSING SENSORS TROUBLESHOOTING THE SAFETY Fasten the Door Bracket ONE-PIECEDOORS Metal Doors: Connect Door Arm to Trolley ALL ONE-PIECEDOORS 1.Assemble the Door Arm: Program the Travel Limits Setting the Force Test the Safety Reversal System Test The Protector System® (Safety Sensors) Using Your Garage Door Opener Using the Wall-MountedDoor Control To Open the Door Manually Battery Backup (Optional) Care of Your Opener Having a Problem (Troubleshooting) 1 FLASH FLASHES 3 FLASHES To Add or Reprogram a Hand-heldRemote Control To Erase All Codes From Motor Unit Memory *3-ButtonRemotes To Add, Reprogram or Change a Keyless Entry PIN Rail Assembly Parts Installation Parts Motor Unit Assembly Parts ACCESSORIES 1702LM Outside Quick Release: 41A5281 Extension Brackets: 377LM Page Page Page LIFTMASTER FIVE YEAR LIMITED WARRANTY LIFETIME MOTOR AND BELT LIMITED WARRANTY