Chamberlain 3245M User Manual

The Chamberlain Group, Inc.845 Larch AvenueElmhurst, Illinois 60126-1196www.liftmaster.comGARAGE DOOR OPENERModels 3245M 1/3 HP3255M 1/2 HP 3255-

10Clevis Pin5/16"x2-3/4"Ring FastenerINSTALLATION STEP 3Attach the Rail to the Header Bracket• Position the opener on the garage floor belo

11ONE-PIECE DOOR WITHOUT TRACKA 2x4 on its side is convenient for setting an idealdoor-to-rail distance. • Remove foam packaging.• Raise the opener

12INSTALLATION STEP 5Hang the OpenerThree representative installations are shown. Yours may be different. Hanging brackets should be angled (Figure 1)

13LOCKLIGHTKG13975KG13975To prevent possible SERIOUS INJURY or DEATH from electrocution:• Be sure power is NOT connected BEFORE installing door contr

14INSTALLATION STEP 7Install the Light • Press the release tabs on both sides of lens. Gently rotate lens back and downward until the lens hinge is i

15INSTALLATION STEP 9Electrical RequirementsTo avoid installation difficulties, do not run the opener at this time.To reduce the risk of electric shoc

16Invisible Light BeamProtection AreaSafety Reversing Sensor6" (15 cm) max. above floorSafety Reversing Sensor6" (15 cm) max. above floorFac

17DOOR TRACK MOUNT (RIGHT SIDE)IndicatorLightLensLip DoorTrackFLOOR MOUNT (RIGHT SIDE)WALL MOUNT (RIGHT SIDE)IndicatorLightLensExtension Bracket(See A

18Invisible Light BeamProtection AreaSafety Reversing SensorSafety Reversing SensorConnect Wire toOpener Quick-Connect TerminalsBell WireBell WireFini

19Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of door bracket. Contact your door manufacture

2Introduction 2-5Safety symbol and signal word review . . . . . . . . . . . . . . 2Preparing your garage door . . . . . . . . . . . . . . . . . . .

20Header WallVerticalCenterline ofGarage DoorFinished CeilingOptionalPlacementof DoorBracketHeaderBracketDoorBracket2x4 SupportFor a door with no expo

21INSTALLATION STEP 12Connect Door Arm to TrolleyFollow instructions which apply to your door type as illustrated below and on the following page.SECT

22ALL ONE-PIECE DOORS1. Assemble the door arm, Figure 5:IMPORTANT: The groove on the straight door arm MUST face away from the curved door arm (Figure

23ADJUSTMENT STEP 1Adjust the UP and DOWN Travel LimitsLimit adjustment settings regulate the points at which the door will stop when moving up or dow

24ADJUSTMENT STEP 2Adjust the ForceForce adjustment controls are located on the back panel of the motor unit. Force adjustment settings regulate the a

25Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage

26OPERATIONIMPORTANT SAFETY INSTRUCTIONSTo reduce the risk of SEVERE INJURY or DEATH:Using Your Garage Door OpenerYour Security✚® opener and hand-held

27To Open the Door ManuallyThe door should be fully closed if possible. Pull down on the emergency release handle and lift the door manually. To recon

28CARE OF YOUR OPENERLIMIT AND FORCE ADJUSTMENTS:Weather conditions may cause some minor changes in door operation requiring somere-adjustments, parti

29HAVING A PROBLEM?1. My door will not close and the light bulbs blink on my motor unit: The safety reversing sensor must be connected and aligned co

3To prevent damage to garage door and opener:• ALWAYS disable locks BEFORE installing and operating the opener. • ONLY operate garage door opener at

30Bell WireSafety Reversing SensorDiagnosticsLocated On Motor UnitLED or Diagnostic LED"Learn" Button Installed Safety Reversing SensorYour

31*3-Button Remotes If provided with your garage door opener, the large button is factory programmed to operate it. Additional buttons on any Security

321. Enter a four digit personal identification number (PIN) of your choice on the keypad. Then press and hold ENTER.2. While holding the ENTER butt

331345 62REPAIR PARTSRail Assembly PartsKEY PART NO. NO. DESCRIPTION1 4A1008 Master link kit2 41A4813 Chain pulley bracket3 41A3489 Complete t

34Motor Unit Assembly Parts2 10 8 13 14 15 19 4 5 3 9 16 12 18 11 17 1 6 7 DN UP BrownWire(Down)ContactLIMIT SWITCH ASSY.GreyWireYellowWire(Up)Contact

35ACCESSORIES CLOSEDOPEN374LM370LM395LM41A52811702LM Outside Quick Release:Required for a garage with NO access door. Enables homeowner to open garage

© 2010, The Chamberlain Group, Inc.114A3588B All Rights Reserved LIFTMASTER® ONE-YEAR LIMITED WARRANTYFOUR YEAR MOTOR LIMITED WARRANTYThe Chamberla

4PlanningIdentify the type and height of your garage door. Survey your garage area to see if any of the conditions below apply to your installation. A

5Your garage door opener is packaged in two cartons which contain the motor unit and all parts illustrated below. Accessories will depend on the model

6ASSEMBLY STEP 1Attach the Rail to the Motor UnitTo avoid installation difficulties, do not run the garage door opener until instructed to do so.• Re

7Lock WasherInner NutTrolleyChainBase of Rail1/2" (13 mm)Outer NutMid Length of RailTo Tighten Outer NutTo Tighten Inner NutINSTALLATIONASSEMBLY

8INSTALLATION STEP 1Determine the Header Bracket LocationInstallation procedures vary according to garage door types. Follow the instructions which ap

9INSTALLATION STEP 2Install the Header BracketYou can attach the header bracket either to the wall above the garage door, or to the ceiling. Follow th