Table of Contents
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Garage Door Opener
Model 1256R - 1/2HP
Model 1246R - 1/3HP
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
properly aligned.
Periodic checks of the opener are required to ensure safe operation.
The model number label is located on the front panel of your opener.
TM
Owner's Manual
Model Series 1200
For Residential Use Only
Model 1240R - 1/4HP
The Chamberlain Group, Inc.
A DUCHOSSOIS ENTERPRISE
845 Larch Avenue
Elmhurst, Illinois 60126
Complies with UL 325
Regulations effective
January 1, 1993.
Model 1255R - 1/2HP
Model 1245R - 1/3HP
®
is connected and
®
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Table of Contents
Related Manuals for Chamberlain Series 1200
Summary of Contents for Chamberlain Series 1200
- Page 1 Complies with UL 325 Regulations effective January 1, 1993. ® Garage Door Opener Owner's Manual Model Series 1200 For Residential Use Only Model 1256R - 1/2HP Model 1255R - 1/2HP Model 1246R - 1/3HP Model 1245R - 1/3HP Model 1240R - 1/4HP Please read this manual and the enclosed safety materials carefully! Fasten the manual near the garage door after installation.
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Page 2: Table Of Contents
CONTENTS PAGE CONTENTS PAGE Attach manual release rope and handle....19 A review of safety alert symbols ......2 Electrical requirements ........20 You'll need tools .............3 The Protector System ® .........21 Safety information regarding garage door locks Install the safety reversing sensor ....22, 23 and ropes.............3 Fasten door bracket (sectional door) ....24 Testing your garage door for sticking, binding... -
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
Sectional Door Installation Before you begin, survey your garage area to see whether any of the conditions below apply to your installation. FINISHED CEILING Support bracket & fastening hardware is required. Horizontal and vertical reinforcement See page 17. is needed for lightweight garage doors Slack in chain tension (fiberglass, steel, aluminum, is normal when... -
Page 5: Illustration Of One-Piece Door Installation
One-Piece Door without Track One-Piece Door Installation Before you begin, survey your garage area to see whether any of the conditions below apply to your installation. Header Wall Closed Position Chain Access Door Pulley Bracket Trolley Header Bracket T-rail Door Bracket Manual Release... -
Page 6: 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 shown on page 7. All Models except 1256R &... -
Page 7: Hardware Inventory
Group all hardware found in all packages contained in the opener carton into the two kits illustrated below. Installation Hardware Lag Screw Hex Screw 5/16"-9 x1-5/8" (2) Lock Washer 5/16" (6) Rail Grease 5/16"-18x7/8" (4) Ring Fastener (3) Lag Screw Handle 5/16"-18x1-7/8"... -
Page 8: Assembly Section - Pages 8 - 11 Fasten T-Rail To Opener
Assembly Step 1 CAUTION Attach the T-rail to the Opener Step 1 Attach Tee Rail To Opener Chassis - Liftmaster C To fasten rail, use only those screws mounted For Models 1255R, 1245R, and 1240R in top of the opener. Any other screws will 10/4/91 cause serious damage to the opener. - Page 9 Assembly Step 1 CAUTION CAUTION Attach the T-rail to the Opener To fasten rail, use only those screws mounted For Models 1256R and 1246R only in the top of the opener. Any other screws will cause serious damage to the opener. Styrofoam •...
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Page 10: Attach Chain Spreader, Re-Install Chain
Assembly Step 2 WARNING Attach the Chain Spreader and Re-install the Chain Serious injury can result if fingers become entangled in moving opener sprocket. Attach For Models 1256R and 1246R only sprocket cover securely. Never operate opener while your hand is near the opener sprocket. #8x1"... -
Page 11: Tighten The Chain
Assembly Step 3 Tighten the Chain (All Models) Lock Outer Nut Washer Inner Nut • Spin the inner nut and lock washer down the To Tighten Outer Nut threaded shaft, away from the trolley. To Tighten • To tighten the chain, turn outer nut in the direction Inner Nut shown. -
Page 12: Installation Section: Pages
SECTIONAL DOOR AND SECTIONAL DOOR AND Installation Section: Pages 12 – 27 ONE-PIECE DOOR WITH TRACK ONE-PIECE DOOR WITH TRACK Installation Step 1 WARNING The Chamberlain Group, Inc. Determine Header Bracket Location Position Header Bracket Finished Finished Vertical Sectional and One-Piece Track Installations If the header bracket is not rigidly fastened to Installation procedures vary according to garage Vertical... -
Page 13: One-Piece Door
Unfinished One Piece Door Without Track Unfinished Header Wall Header Wall Ceiling Ceiling Vertical Vertical 1/30/92 - 4/7/92 ONE-PIECE Door Without Track Centerline Centerline Structural Structural Read the Safety Instructions on page 12. They also apply to doors without tracks. Supports Supports Unfinished... -
Page 14: 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 Mounting New Header Bracket Mounting New Header Bracket 10/16/91 - 10/26/91 - 4/5/92... -
Page 15: Attach The T-Rail To Header Bracket
Attach Tee Rail to Header Bracket 2/4/92 - 4/9/92 - 5/3/92 -5/5/92 Installation Step 3 Attach the T-rail to the Header Bracket • Position the opener on the garage floor below the header bracket. Use packing material as a protective base. Header Wall If the door spring is in the way you'll need help. -
Page 16: Position The Opener
Installation Step 4 CAUTION 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 17: 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 18: Install The Door Control
Installation Step 6 WARNING Install the Door Control Children operating or playing with a garage door opener can injure themselves or others. The garage door could close and cause • Locate the Door Control within sight of the serious injury or death. door at a minimum height of 5 feet where small Install the Door Control (or any additional push children cannot reach, and away from all... -
Page 19: Install The Light(S) And Lens(Es)
Installation Step 7 Install the Light and the Lens Install the light: • Install a 75 watt maximum light bulb in the socket. The light will turn ON and remain lit for approximately 4-1/2 minutes when power is connected. Then the light will turn OFF. •... -
Page 20: 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 21: The Protector System
The Protector System ® IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR WARNING The safety reversing sensor must be connected Without a properly working safety reversing and aligned correctly before the garage door sensor, persons (particularly children) could opener will move in the down direction. This is a be injured or killed by a closing garage door. -
Page 22: Install The Safety Reversing Sensor
Figure 2 DOOR TRACK MOUNT (Right Side) Installation Step 10 Install the Safety Reversing Sensor (Receiving and Sending Eyes) Door Track INSTALLING THE BRACKETS Indicator Be sure power to the opener is disconnected. light Install and align the brackets so the sensors will face each other across the garage door, with the beam from 4 –... - Page 23 MOUNTING AND WIRING THE SAFETY SENSORS Figure 5 • Slide a 1/4"-20x1/2" carriage bolt head into the slot on each sensor. Use wing nuts to fasten sensors to Wing nut brackets, with lenses pointing toward each other across the door. Be sure the lens is not obstructed by a bracket extension.
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Page 24: Fasten Door Bracket (Sectional Door)
Installation Step 11 CAUTION CAUTION Fasten Door Bracket To prevent damage to steel, aluminum, Follow instructions which apply to your door type fiberglass or glass panel doors, always as illustrated below or on page 25. reinforce the inside of the door both vertically and horizontally with angle iron. -
Page 25: Fasten Door Bracket (One-Piece Door)
All ONE-PIECE Door Installation Procedure Please read and comply with the warnings and reinforcement instructions on page 24. They apply to one-piece doors also. Header Wall Header 2x4 Support Bracket — Finished Ceiling — Horizontal and vertical reinforcement is Door Optional needed for lightweight garage doors Bracket... -
Page 26: 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 27. 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 27: Connect Door Arm To Trolley (One-Piece Door)
All ONE-PIECE Doors Assemble the Door Arm: Ring Door Fastener Bracket • Fasten the straight and curved door arm sections Nuts together to the longest possible length (with a 2 or Lock 5/16"-18 Washers 3 hole overlap). 5/16" • With the door closed, connect the straight door arm Clevis Pin Straight 5/16"x1-1/4"... -
Page 28: Adjustment Section: Pages
Adjustment Section: Pages 28 – 30 Adjustment Step 1 WARNING Adjust the UP and DOWN Limits The Chamberlain Group, Inc. Improper adjustment of the travel limits will Do not make any limit adjustments until the Limit Adjustment Art interfere with the proper operation of the safety safety reversing sensors are completely reverse system. -
Page 29: 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 Force adjustment controls are located on the back when required and could seriously injure or panel of the opener. -
Page 30: 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 seriously injured or killed if trapped by a closing the door. garage door. -
Page 31: 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 32: Operation Of Your Opener
Operation of Your Opener Activate the opener with any of the following devices: WARNING • The Remote Control Transmitter. Hold push button down until the door starts to move. Weak or broken springs could allow an open • The Door Control. Hold button down until the door to fall (either rapidly or unexpectedly), resulting in serious injury, death or property door starts to move. -
Page 33: Receiver And Remote Control Programming
Receiver and Remote Control Programming NOTICE: To comply with FCC rules, adjustment or modification of this receiver and/or transmitter are prohibited, except for changing the code setting or replacing the transmitter battery. THERE ARE NO OTHER USER SERVICEABLE PARTS. Your garage door opener receiver and remote control WARNING transmitter have been set at the factory to a matching code. -
Page 34: 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 35 Having a Problem? (continued) Situation Probable Cause & Solution The door opens but 1. If the opener light blinks, check the safety reversing sensor. See page 23. won't close: 2. If the opener light does not blink and it is a new installation, check the down force. See Adjustment Step 2, page 29.
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Page 36: Repair Parts, Rail Assembly
Repair Parts Rail Assembly Parts PART DESCRIPTION 4A1008 Master link kit 41A4813 Chain pulley bracket 41A3489 Complete trolley assembly 183B99 One-piece T-rail 41D3484 Full chain assembly 83A4 Rail grease Installation Parts PART DESCRIPTION 41A4166 Door control button 41A5056-1 Single-function remote control case (no circuit board) 10A20 3V2032 Lithium battery... -
Page 37: Repair Parts, Opener Assembly
Repair Parts Opener Assembly Parts LIMIT SWITCH ASSY. (Down) Contact Brown Wire Grey Wire Drive Gear Center Limit (Up) Yellow Contact Contact Wire KEY PART KEY PART NO. NO. DESCRIPTION NO. NO. DESCRIPTION 41D3058 Universal replacement motor & 41A4208 Chain spreader w/screws bracket assy. -
Page 38: Accessories
Accessories Available For Your Opener Outside Quick Release: Model 971LM SECURITY Single-Function Model 1702 Remote Control: Required for a garage with NO access door. Includes visor clip. Model 59 Outside Keylock: Model 972LM SECURITY 2-Channel Remote Control: Opens the garage door automatically from outside when Includes visor clip. -
Page 39: Index
Index Access Door/Outside Key Release Accessory ....................4, 5 Chain Tension ..............................4, 5, 11 Electrical Safety Warnings........................2, 20, 31 Garage Door Testing for balance, binding and sticking....................3, 28, 31 Determining high point of travel: Sectional Door ..............................12 One-Piece Door ..............................13 Disabling existing locks............................3, 11 Force Controls Adjustment Procedures ............................29 Problems that might require Force adjustments ..................34, 35... -
Page 40: How To Order Repair Parts
Service number for a list of dealers in your area. 1-800-528-2817 LIFT-MASTER GARAGE DOOR OPENER ONE-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 one year from the date of purchase.