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®
TM
Garage Door Opener
Model 1280-298LMC
- 1/2 HP -
For Residential Use Only
Owner's Manual
Please read this manual and the enclosed safety materials carefully!
Fasten the manual near the garage door after installation.
The door WILL NOT CLOSE unless the Protector System
®
is connected and
properly aligned.
Periodic checks of the opener are required to ensure safe operation.
The model number label is located under the light lens on the left side of
your opener.
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Table of Contents
Related Manuals for Chamberlain 1280-298LMC - 1/2 HP
Summary of Contents for Chamberlain 1280-298LMC - 1/2 HP
- Page 1 ® Garage Door Opener Model 1280-298LMC - 1/2 HP - For Residential Use Only Owner's Manual Please read this manual and the enclosed safety materials carefully! Fasten the manual near the garage door after installation. The door WILL NOT CLOSE unless the Protector System ®...
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Page 2: Table Of Contents
CONTENTS PAGE CONTENTS PAGE A review of safety alert symbols .......2 Electrical requirements .........16 You'll need tools............3 The Protector System ® safety reversing Safety information regarding garage door locks sensor information ..........17 and ropes ...............3 Install the safety reversing sensor ....18, 19 Testing your garage door for sticking, binding Fasten door bracket (sectional door) ....20 and balance ............3... -
Page 3: You'll Need Tools
You'll Need Tools During assembly, installation and adjustment of the opener, instructions will call for hand tools shown below. Pencil Carpenter's Level Hack Saw Tape Measure Wire Cutters Drill Claw Hammer 3/16", 5/16" and 5/32" Drill Bits Pliers 1/2" and 7/16" Sockets Stepladder Screwdriver Adjustable End Wrench... -
Page 4: Llustration Of Sectional Door Installation
Before you begin, survey your garage area to see whether any of the conditions below apply to your installation. You may find it helpful to refer back to this page as you proceed with the installation of your opener. FINISHED CEILING Sectional Door Installation Support bracket &... -
Page 5: Carton Inventory
Carton Inventory Your garage door opener is packaged in two cartons which contain all parts illustrated below. If anything is missing, carefully check the packing material. Parts may be "stuck" in the foam. Hardware for installation is also listed below. Remote Control Transmitter Visor Clip SECURITY... -
Page 6: Assembly Section: Pages
Assembly Section: Pages 6 - 7 ASSEMBLY STEP 1 CAUTION Attach the T-Rail To the Opener To fasten rail, use only those screws mounted in the top of the opener. Any other screws will cause serious damage to the opener. Washered Screw 5/16"-18x1/2"... -
Page 7: Attach Belt Cap Retainer
Assembly Step 3 WARNING Attach the Belt Cap Retainer Serious injury can result if fingers become entangled in moving opener sprocket. Attach belt cap retainer securely. Never operate opener while your hand is near the opener sprocket. • Position the belt cap retainer over the opener sprocket so the two holes in cap align Hex Screws with the two holes in mounting plate. -
Page 8: Installation Section: Pages
Installation Section: Pages 8 – 23 Installation Step 1 WARNING Determine Header Bracket Location If the header bracket is not rigidly fastened to Installation procedures vary according to garage a structural support on the header wall or door types. Follow the instructions which apply to ceiling, the safety reverse system may not your door. -
Page 9: One-Piece Door
ONE-PIECE Door Without Track Read the Safety Instructions on page 8. They also apply to doors without tracks. Unfinished Header Wall Ceiling Vertical Centerline • Close the door and mark the inside vertical centerline of Structural Supports your garage door. Extend the line onto the header wall above door. -
Page 10: Install The Header Bracket
You can attach the header bracket either to the Installation Step 2 wall above the garage door, or to the ceiling. Follow the instructions which will work best for Install the Header Bracket your particular requirements. Fasten the Header Bracket to the Wall •... -
Page 11: Attach The T-Rail To Header Bracket
Installation Step 3 Attach the T-rail to the Header Bracket • Position the opener on the garage floor below the Liftmaster Synchro Drive header bracket. Use packing material as a Header Wall protective base. Tee Rail to Header Bracket If the door spring is in the way you'll need help. Header 5/16/92 Bracket... -
Page 12: Position The Opener
Installation Step 4 CAUTION Position the Opener To prevent damage to steel, aluminum, Follow instructions which apply to your door type fiberglass or glass panel doors, do not rest the as illustrated. opener on the door without using a 2x4. SECTIONAL Door &... -
Page 13: Hang The Opener
Installation Step 5 WARNING Hang the Opener The opener could fall and injure someone if it is not properly secured. Fasten the opener securely to structural supports of the garage. Two representative installations are shown. Yours may be different. Hanging brackets should be angled, Figure 1, to provide rigid support. -
Page 14: Install The Door Control
Installation Step 6 WARNING Install the Door Control Panel DO NOT CONNECT TO LIVE ELECTRICAL WIRING. CONNECT ONLY TO 24 VOLT LOW VOLTAGE WIRES. CONNECTION TO LIVE WIRES OR HIGHER Locate the door control within sight of the door at a VOLTAGE MAY CAUSE SERIOUS INJURY FROM minimum height of 5 feet where small children cannot SHOCK, BURN OR ELECTROCUTION. -
Page 15: Install The Lights And Lenses
Installation Step 7 Install the Lights and the Lenses Lens Guide • Install a 75 watt maximum light bulb in the socket. 75 Watt The light will turn ON and remain lit for Maximum Light Bulb approximately 4-1/2 minutes when power is connected. -
Page 16: Electrical Requirements
Installation Step 9 WARNING Electrical Requirements To prevent electrocution or fire, installation and wiring must be in compliance with local To reduce the risk of electric shock, your garage electrical and building codes. door opener has a grounding type plug with a third Do NOT use an extension cord, 2-wire adapter, grounding pin. -
Page 17: The Protector System
The Protector System ® IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR WARNING Without a properly working safety reversing The safety reversing sensor must be connected sensor, persons (particularly children) could be and aligned correctly before the garage door injured or killed by a closing garage door. Read opener will move in the down direction. -
Page 18: Install The Safety Reversing Sensor
Figure 2 Installation Step 10 DOOR TRACK MOUNT (Right Side) Install the Safety Reversing Sensor Door Track INSTALLING THE BRACKETS Be sure power to the opener is disconnected. Indicator Install and align the brackets so the sensors will face light each other across the garage door, with the beam from 4 –... -
Page 19: Mounting And Wiring The Safety Sensors
MOUNTING AND WIRING THE SAFETY SENSORS Figure 5 • Slide a 1/4"-20x1/2" carriage bolt head into the slot Wing nut on each sensor. Use wing nuts to fasten sensors to brackets, with lenses pointing toward each other across the door. Be sure the lens is not obstructed by a bracket extension. -
Page 20: Fasten Door Bracket (Sectional Door)
Installation Step 11 WARNING Fasten Door Bracket Follow instructions which apply to your door type To prevent damage to steel, aluminum, as illustrated below or on page 21. fiberglass or glass panel doors, always reinforce the inside of the door both vertically and horizontally with angle iron. -
Page 21: Fasten Door Bracket (One-Piece Door)
All ONE-PIECE Door Installation Procedure Please read and comply with the warnings and reinforcement instructions on page 20. They apply to one-piece doors also. Header Wall 2x4 Support — Finished Ceiling — Header Bracket Horizontal and vertical reinforcement is Door needed for lightweight garage doors Bracket (fiberglass, aluminum, steel, door with... -
Page 22: Connect Door Arm To Trolley (Sectional Door)
Installation Step 12 Connect Door Arm to Trolley Follow instructions which apply to your door type as illustrated below and on page 23. SECTIONAL Doors Only Make sure garage door is fully closed. Pull the manual release handle to disconnect the outer trolley from the inner trolley. -
Page 23: Connect Door Arm To Trolley (One-Piece Door)
All ONE-PIECE Doors Assemble the Door Arm: Can/DoorArmToTrolley 1 pc Door • Fasten the straight and curved door arm sections Bracket Ring together to the longest possible length (with a 2 or 3 Fastener Lock Nuts hole overlap). Washers 5/16"-18 5/16"... -
Page 24: Adjustment Section: Pages
Adjustment Section: Pages 24 – 26 Adjustment Step 1 WARNING Adjust the UP and DOWN Limits Improper adjustment of the travel limits will Do not make any limit adjustments until the interfere with the proper operation of the safety safety reversing sensors are completely reverse system. -
Page 25: Force Adjustments
Adjustment Step 2 WARNING Adjust the Force Too much force on the door will interfere with the proper operation of the safety reverse system. The door might not reverse properly when required and could seriously injure or Force adjustment controls are located on the right kill someone under it. -
Page 26: Test The Protector System
Adjustment Step 3 WARNING Test the Protector System ® Without a properly working safety reversing sensor, persons (particularly children) could be • Press the remote control push button to open the seriously injured or killed if trapped by a closing door. -
Page 27: Operation Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS WARNING WARNING To reduce the risk of severe injury or death to persons: 1. READ AND FOLLOW ALL INSTRUCTIONS. 2. Do not permit children either to operate or to play with the opener. Keep remote control in a location inaccessible to children. -
Page 28: Operation Of Your Opener
Operation of Your Opener Activate the opener with any of the following: WARNING • The Remote Control Transmitter. Hold push button down until the door starts to move. • The Door Control. Hold push bar down until the door Weak or broken springs could allow an open starts to move. -
Page 29: Receiver And Remote Control Programming
Receiver and Remote Control Programming NOTICE: To comply with FCC/IC rules, adjustment or modifications of this WARNING receiver and/or transmitter are prohibited, except for changing the code setting or replacing the battery. THERE ARE NO OTHER USER SERVICEABLE PARTS. Children operating or playing with a garage door opener can injure themselves or others. -
Page 30: Having A Problem
Having a Problem? Situation Probable Cause & Solution 1. Does the opener have electric power? Plug a lamp into the outlet. If it doesn't light, The opener doesn't check the fuse box or the circuit breaker. (Some outlets are controlled by a wall switch.) operate from either the Door Control or 2. - Page 31 Having a Problem? (continued) Situation Probable Cause & Solution The door opens but 1. If the opener lights blink, check the safety reversing sensor. See page 19. won't close: 2. If the opener lights do not blink and it is a new installation, check the down force. See Adjustment Step 2, page 25.
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Page 32: Repair Parts, Rail Assembly
Repair Parts Rail Assembly Parts PART DESCRIPTION 1A995 Master link kit 41A3588-1 Belt pulley bracket 41B3869-1 Complete trolley assembly 183B99 One-piece T-rail 41A3589-12 Full belt assembly 41B4103 Tensioner assembly 109B33 Trolley clip Installation Parts PART DESCRIPTION 41C0472-3 Motion detecting door control panel 41A5056-3 3-channel remote control housing (no circuit board) -
Page 33: Repair Parts, Opener Assembly
Repair Parts Opener Assembly Parts 18 19 (Down) LIMIT SWITCH ASSY. Brown Contact Wire Grey Wire Drive Gear Center Limit (Up) Yellow Contact Contact Wire PART PART DESCRIPTION DESCRIPTION 41A4371 Belt cap retainer 30B363 Capacitor - 1/2HP 41A4885-2 Gear and sprocket assembly 12A373 Capacitor bracket Complete with:... -
Page 34: Accessories
Accessories Available For Your Opener Model 1702LMC Outside Quick Release: Model 59LMC Outside Keylock: Required for a garage with NO Opens the garage door access door. automatically from outside when remote control is not handy. Model 1778LMC 8 foot Complete Rail: SECURITY 3-Channel Model 973LMC Remote Control:... -
Page 35: Receiver & Remote Control Programming
Index Access Door/Outside Quick Release Accessory..................4, 34 Electrical Safety Warnings........................2, 7, 16, 27 Garage Door Testing for balance, binding and sticking....................3, 25, 27 Determining high point of travel: Sectional Door ..............................8 One-Piece Door ..............................8, 9 Disabling existing locks............................3, 7 Force Controls Adjustment Procedures ............................25 Problems that might require Force adjustments ..................30, 31 Safety Warnings ............................25, 27... -
Page 36: How To Order Repair Parts
LIFT-MASTER GARAGE DOOR OPENER FIVE-YEAR LIMITED WARRANTY The Chamberlain Group, Inc. (“Seller”) warrants to the first retail purchaser of this product, for the residence in which this product is originally installed, that it will be free from any defect in materials and/or workmanship for a period of five years from the date of purchase.