Chamberlain 1240R - 1/4HP User Manual

The Chamberlain Group, Inc.845 Larch AvenueElmhurst, Illinois 60126-1196www.liftmaster.comGARAGE DOOR OPENERModel Series 1200For Residential Use Only

10ASSEMBLY STEP 2Attach the Chain Spreaderand Re-install the ChainMODELS 1256R AND 1246R ONLY• Line up the holes in the chain spreader with theholes i

11ASSEMBLY STEP 5Tighten the ChainALL MODELS• Spin the inner nut and lock washer down thetrolley threaded shaft, away from the trolley.• To tighten th

12INSTALLATION STEP 1Determine the Header BracketLocationInstallation procedures vary according to garage doortypes. Follow the instructions which app

13Header WallVerticalCenterlineof GarageDoor2x4UnfinishedCeiling2x4OPTIONALCEILING MOUNTFOR HEADER BRACKETStructuralSupportsONE-PIECE DOOR WITHOUT TRA

14INSTALLATION STEP 2Install the Header BracketYou can attach the header bracket either to the wallabove the garage door, or to the ceiling. Follow th

Clevis Pin5/16"x2-3/4"Ring Fastener15INSTALLATION STEP 3Attach the Rail to the HeaderBracket• Position the opener on the garage floor below

16ONE-PIECE DOOR WITHOUT TRACK• With the door fully open and parallel to the floor,measure the distance from the floor to the top ofthe door.• Using a

17INSTALLATION STEP 5Hang the OpenerTwo representative installations are shown. Yoursmay be different. Hanging brackets should be angled(Figure 1) to

18To prevent possible SERIOUS INJURY or DEATH fromelectrocution:• Be sure power is not connected BEFORE installing doorcontrol.• Connect ONLY to 24 VO

19INSTALLATION STEP 7Install the Light and Lens INSTALL THE LIGHT• Install a 75 watt maximum light bulb in the socket.The light will turn ON and remai

2When you see these Safety Symbols and SignalWords on the following pages, they will alert you tothe possibility of serious injury or death if you don

20INSTALLATION STEP 9Electrical RequirementsTo avoid installation difficulties, do not run theopener at this time.To reduce the risk of electric shock

21Invisible Light BeamProtection AreaSensor Beam6" (15 cm) max.above floorSensor Beam6" (15 cm) max.above floorFacing the door from inside t

22DOOR TRACK MOUNT (RIGHT SIDE)IndicatorLightLensLip SensorBracketDoorTrackFLOOR MOUNT (RIGHT SIDE)WALL MOUNT (RIGHT SIDE)IndicatorLightSensorBracketL

23Carriage Bolt 1/4"-20x1/2"LensWing NutFigure 5MOUNTING AND WIRING THE SAFETY SENSORS• Slide a 1/4"-20x1/2" carriage bolt head in

24INSTALLATION STEP 11Fasten the Door Bracket Follow instructions which apply to your door typeas illustrated below or on the following page.A horizon

25Header WallVerticalCenterline ofGarage DoorFinished CeilingOptionalPlacementof DoorBracketHeaderBracketDoorBracket2x4 SupportFor a door with no expo

26INSTALLATION STEP 12Connect Door Arm to TrolleyFollow instructions which apply to your door type asillustrated below and on the following page.SECTI

27ALL ONE-PIECE DOORS1. Assemble the door arm, Figure 4:• Fasten the straight and curved door arm sectionstogether to the longest possible length (wit

28ADJUSTMENT STEP 1Adjust the UP and DOWN TravelLimitsLimit adjustment settings regulate the points at whichthe door will stop when moving up or down.

29ADJUSTMENT STEP 2Adjust the ForceForce adjustment controls are located on the backpanel of the motor unit. Force adjustment settingsregulate the amo

3To prevent damage to garage door and opener:• ALWAYS disable locks BEFORE installing and operatingthe opener. • ONLY operate garage door opener at 12

30Without a properly installed safety reversal system,persons (particularly small children) could beSERIOUSLY INJURED or KILLED by a closing garagedoo

OPERATION 31Using Your Garage Door OpenerYour Security✚®opener and hand-held remotecontrol have been factory-set to a matching codewhich changes with

To Open the Door ManuallyThe door should be fullyclosed if possible. Pull downon the emergency releasehandle and lift the doormanually. To reconnect t

33Care of Your OpenerLIMIT AND FORCE ADJUSTMENTS:Weather conditions may causesome minor changes in dooroperation requiring somereadjustments, particul

34Having a Problem? (Continued)6. The garage door opens and closes by itself:• Be sure that all remote control push buttons areoff.• Remove the bell w

LOCKLIGHT*3-Button RemotesIf supplied with yourgarage door opener,the large button isfactory programmed tooperate it. Additionalbuttons on anySecurity

1. Enter a four digit personalidentification number (PIN) of yourchoice on the keypad. Then pressand hold ENTER.2. While holding the ENTER button,pres

7UPCEILING MOUNT ONLY1110NOTICE5681491232Installation Parts37REPAIR PARTSKEY PARTNO. NO. DESCRIPTION 1 41A4166 Door control button2 971LM Single-butt

Motor Unit Assembly Parts38212A108131415161943DNUPBrownWire(Down)ContactLIMIT SWITCH ASSY.GreyWireYellowWire(Up)ContactCenter LimitContactDriveGear920

39LOCKLIGHTLOCKLIGHTCLOSEDOPENACCESSORIES 973LM974LM995LM1708LM41A52811702LMOutside Quick Release:Required for a garage with NOaccess door. Enables ho

Safety Reversing SensorSupport bracket & fastening hardwareis required.See page 17. — — — — — — — —Header WallFINISHED CEILINGTorsio

© 2004, The Chamberlain Group, Inc.114A2217K All Rights Reserved Printed in MexicoLIFTMASTER SERVICE ISON CALLOUR LARGE SERVICE ORGANIZATIONSPANS AMER

5Without a properly working safety reversal system,persons (particularly small children) could beSERIOUSLY INJURED or KILLED by a closing garagedoor.•

6Straight DoorArm SectionCurved Door Arm SectionSafety LabelsandLiteratureHeader BracketUPCEILING MOUNT ONLYSprocket Cover2-Conductor Bell WireWhite &

7Hardware InventorySeparate all hardware and group as shown below for the assembly and installation procedures.Nut 5/16"-18 (4)Clevis Pin5/16&quo

8To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the top ofthe opener.WARNINGCAUTIONWARNINGWARNINGASSEMBLY ST

9ASSEMBLY STEP 1Fasten the Rail to the Motor UnitMODELS 1256R and 1246R ONLY• Remove the two washered bolts mounted in top ofmotor unit.• Align rail a