Chamberlain 1200 User Manual Page 1

TMThe Chamberlain Group, Inc.A DUCHOSSOIS ENTERPRISE845 Larch AvenueElmhurst, Illinois 60126Garage Door OpenerOwner's Manual(Model Series 1200)Fo

Assembly Step 2Attach the Chain Spreaderand Re-install the ChainFor Models 1256 and 1246 only10ChainSpreader#8x1"Hex ScrewUSE ONLYTHIS TYPEAND SI

• Spin the inner nut and lock washer down thethreaded shaft, away from the trolley.• To tighten the chain, turn outer nut in the directionshown. As yo

• Open your door to the highestpoint of travel as shown. Drawan intersecting horizontal lineon the header wall 2" abovethe high point. This heigh

Header WallVerticalCenterlineVerticalCenterline ofGarage Door2x4UnfinishedCeilingStructuralSupports2x4OPTIONAL CEILING MOUNTFOR HEADER BRACKET• Close

Lag Screws5/16"x18x1-7/8"HighestPoint of Travel(of Garage Door)VerticalCenterLineHeaderWallGarageDoorUPCEILING MOUNT ONLYWallMountin

HeaderBracketChainPulleyBracketTemporarySupportHeader WallGarageDoorT-railClevis Pin5/16"x2-3/4 "Ring FastenerHeader BracketChainPulleyBrack

Installation Step 4Position the OpenerFollow instructions which apply to your door typeas illustrated.To prevent damage to steel, aluminum,fiberglass

Installation Step 5Hang the OpenerTwo representative installations are shown.Yours may be different. Hanging brackets shouldbe angled, Figure 1, to pr

Installation Step 6Install the Door Control 18Children operating or playing with a garagedoor opener can injure themselves or others.The garage door c

Lens Slot75 Watt Max.Light BulbLens TabLightLensPanel ScrewInstall the light(s):• Install a 75 watt maximum light bulb in eachsocket. The light(s) wil

Start by reviewing these important safety alert symbols2CONTENTS PAGEA review of safety alert symbols...2You'll need to

To reduce the risk of electric shock, your garagedoor opener has a grounding type plug with a thirdgrounding pin. This plug will onlyfit into a ground

The safety reversing sensor mustbe connectedand aligned correctly before the garage dooropener will move in the down direction. This is arequired safe

GarageFloorInsideGarageWallAlternate Floor MountMounting Bracketwith SlotMounting Bracketwith Square Holes"C" WrapSensorIndicatorLightAttach

Invisible Light BeamProtection AreaSensorSensorConnect Wire toOpener TerminalsBell WireBell Wire— Finished Ceiling —OPENER TERMINAL SCREWSSensorConnec

Installation Step 11Fasten Door Bracket Follow instructions which apply to your door typeas illustrated below or on page 25.To prevent damage to steel

DoorBracketTop of Door(Inside Garage)Carriage Bolt5/16"-18x2-1/2"OptionalPlacementLock Washer5/16"Nut5/16"-18Horizontal and vertic

Installation Step 12 Connect Door Arm to TrolleyFollow instructions which apply to your door typeas illustrated below and on page 27.Make sure garage

All ONE-PIECE DoorsAssemble the Door Arm:• Fasten the straight and curved door arm sectionstogether to the longest possible length (with a 2 or3 hole

Adjustment Step 1Adjust the UP and DOWN Limits28Limit adjustment settings regulate the points atwhich the door will stopwhen moving up or down.The doo

Adjustment Step 2Adjust the ForceToo much force on the door will interfere withthe proper operation of the safety reversesystem. The door might not re

3SECTIONAL DOORONE-PIECE DOORPliersWire CuttersClaw HammerHack SawScrewdriverAdjustable End Wrench1/2" and 7/16" Socketsand WrenchDrillTape

Adjustment Step 4Test the Safety Reverse SystemTest:• Place a one-inch board (or a 2x4 laid flat) on thefloor, centered under the garage door.• Operat

The remote control transmitterThe opener must learn the code of any new remotecontrol. Page 33 explains how to program yourreceiver and how to erase a

To open the doormanually:The door should befully closed if possible.Pull down on themanual release handleand lift the doormanually. Toreconnect the do

Children operating or playing with a garagedoor opener can injure themselves or others.The garage door could close and causeserious injury or death.Do

1. Does the opener have electric power? Plug a lamp into the outlet. If it doesn't light,check the fuse box or the circuit breaker. (Some outlets

Having a Problem? (continued)Situation Probable Cause & SolutionThe door reversesfor no apparentreason and openerlights don't blink:1. Is som

9UPCEILING MOUNT ONLY71112LIGHTLOCK125NOTICE68131514104321345RAIL GREASENO. 83A4 6Repair PartsRail Assembly PartsInstallation Parts36KEY PARTNO. NO. D

Repair Parts1A2A11914151617205463DNUPBrownWire(Down)ContactLIMIT SWITCH ASSY.GreyWireYellowWire(Up)ContactCenter LimitContactDriveGear8102117137819278

Accessories Available For Your OpenerModel 83LMModel 742LMModel 84LMModel 60Model 66LMModel 17023-Channel Remote Control:Includes visor clip.4-Channel

IndexAccess Door/Outside Key Release Accessory...4, 5Chain

4You may find it helpful to refer back to this page asyou proceed with the installation of your opener.SafetyReversingSensorHorizontal and vertical re

LIFT-MASTER GARAGE DOOR OPENER ONE-YEAR LIMITED WARRANTY Chamberlain/Lift-Master warrants to the first retail purchaser of this product that it will

FINISHED CEILINGSupport bracket& fasteninghardware is required.See page 17.Slack in chain tensionis normal whengarage door is closed.SafetyReversi

6Opener Carton InventoryYour garage door opener is packaged in two cartons which contain all parts illustrated below. If anything ismissing, carefully

Lock Nut1/4"-20 (4)Carriage Bolts1/4"-20x1/2" (4)Safety Reversing SensorInstallation Hardware Kit #41A4116Hex Screw1/4-20x1-1/2"

Assembly Step 1Attach the T-rail to the OpenerFor Models 1260, 1260-266, 1255,1255-266,1250, 1250-266, 1245, 1245-266 and 1240To fasten rail, use only

9• Place the opener on packing material to protectthe cover.• Remove the (2) 5/16"-18x1/2" washered screwsmounted in the top of the opener.•