Table of Contents
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GARAGE DOOR OPENER
Models 3245 1/3 HP
3255 1/2 HP
3255-2 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
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.
®
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
®
is connected and properly
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Table of Contents
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Summary of Contents for Chamberlain 3245 1/3 HP
- Page 1 GARAGE DOOR OPENER Models 3245 1/3 HP 3255 1/2 HP 3255-2 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.
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Page 2: Table Of Contents
Safety Symbol and Signal Word Review This garage door opener has been designed and tested to offer safe service provided it is installed, operated, maintained and tested in strict accordance with the instructions and warnings contained in this manual. Mechanical... -
Page 3: Preparing Your Garage Door
To prevent damage to garage door and opener: • ALWAYS disable locks BEFORE installing and operating the opener. • ONLY operate garage door opener at 120V, 60 Hz to avoid malfunction and damage. Tools needed During assembly, installation and adjustment of the opener, instructions will call for hand tools as illustrated below. -
Page 4: Planning
Planning Identify the type and height of your garage door. Survey your garage area to see if any of the conditions below apply to your installation. Additional materials may be SECTIONAL DOOR INSTALLATION Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, steel, aluminum, door with glass panels, etc.). -
Page 5: Carton Inventory
Carton Inventory Your garage door opener is packaged in two cartons which contain the motor unit and all parts illustrated below. Accessories will depend on the model purchased. Multi-Function Door Control Panel Motor Unit with Light Lens Header Bracket Chain... -
Page 6: Assembly
• Install the sprocket cover: Insert the back tab in the slot. Squeeze the cover slightly and insert the front tab in the slot on the mounting plate. To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of the opener. USE ONLY THIS... -
Page 7: Tighten The Chain
4. Disable ALL locks and remove ALL ropes connected to garage door BEFORE installing opener to avoid entanglement. 5. Install garage door opener 7 feet (2.13 m) or more above floor. 6. Mount emergency release handle 6 feet (1.83 m) above floor. -
Page 8: Determine The Header Bracket Location
INSTALLATION STEP 1 Determine the Header Bracket Location To prevent possible SERIOUS INJURY or DEATH: • Header bracket MUST be RIGIDLY fastened to structural support on header wall or ceiling, otherwise garage door might not reverse when required. DO NOT install header bracket over drywall. -
Page 9: Install The Header Bracket
INSTALLATION STEP 2 Install the Header Bracket You can attach the header bracket either to the wall above the garage door, or to the ceiling. Follow the instructions which will work best for your particular requirements. Do not install the header bracket over drywall. If installing into masonry, use concrete anchors (not provided). -
Page 10: Attach The Rail To The Header Bracket
Header Wall Header Bracket Chain Pulley Bracket Rail Garage Door HARDWARE SHOWN ACTUAL SIZE Clevis Pin 5/16"x2-3/4" INSTALLATION STEP 3 Attach the Rail to the Header Bracket • Position the opener on the garage floor below the header bracket. Use packing material as a protective base. -
Page 11: Position The Opener
• The top of the door should be level with the top of the motor unit. Do not position the opener more than 4" (10 cm) above this point. To prevent damage to garage door, rest garage door opener rail on 2x4 placed on top section of door. RELEASED... -
Page 12: Hang The Opener
INSTALLATION STEP 5 Hang the Opener Three representative installations are shown. Yours may be different. Hanging brackets should be angled (Figure 1) to provide rigid support. On finished ceilings (Figure 2 and Figure 3), attach a sturdy metal bracket to structural supports before installing the opener. -
Page 13: Install The Door Control
INSTALLATION STEP 6 Install the Door Control Locate door control within sight of the door at a minimum height of 5 feet (1.5 m) where small children cannot reach, and away from moving parts of the door and door hardware. The installation surface must be smooth and flat. -
Page 14: Install The Light
4-1/2 minutes when power is connected. Then the lights will turn OFF. • Reverse the procedure to close the lens. • Use A19, standard neck garage door opener bulbs for replacement. NOTE: Use only standard light bulbs. The use of short neck or speciality light bulbs may overheat the endpanel or light socket. -
Page 15: Electrical Requirements
INSTALLATION STEP 9 Electrical Requirements To avoid installation difficulties, do not run the opener at this time. To reduce the risk of electric shock, your garage door opener has a grounding type plug with a third grounding pin. This plug will only fit into a grounding type outlet. If the plug doesn’t fit into the outlet you have, contact a qualified electrician to install the proper outlet. -
Page 16: Install The Protector System
6" (15 cm) max. above floor Facing the door from inside the garage ® Be sure power is not connected to the garage door opener BEFORE installing the safety reversing sensor. To prevent SERIOUS INJURY or DEATH from a closing garage door: •... - Page 17 INSTALLING THE BRACKETS Be sure power to the opener is disconnected. Install and align the brackets so the sensors will face each other across the garage door, with the beam no higher than 6" (15 cm) above the floor. They may be installed in one of three ways, as follows.
- Page 18 MOUNTING AND WIRING THE SAFETY REVERSING SENSORS • Slide a 1/4"-20x1/2" carriage bolt head into the slot 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 (Figure 5).
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Page 19: Fasten The Door Bracket
INSTALLATION STEP 11 Fasten the Door Bracket Follow instructions which apply to your door type as illustrated below or on the following page. A horizontal reinforcement brace should be long enough to be secured to two or three vertical supports. A vertical reinforcement brace should cover the height of the top panel. - Page 20 ONE-PIECE DOORS Please read and comply with the warnings and reinforcement instructions on the previous page. They apply to one-piece doors also. • Center the door bracket on the top of the door, in line with the header bracket as shown. Mark either the left and right, or the top and bottom holes.
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Page 21: Connect Door Arm To Trolley
INSTALLATION STEP 12 Connect Door Arm to Trolley Follow instructions which apply to your door type as illustrated below and on the following page. SECTIONAL DOORS ONLY • Make sure garage door is fully closed. Pull the emergency release handle to disconnect the outer trolley from the inner trolley. -
Page 22: Connect The Door Arm To The Trolley
ALL ONE-PIECE DOORS 1. Assemble the door arm, Figure 4: • Fasten the straight and curved door arm sections together to the longest possible length (with a 2 or 3 hole overlap). • With the door closed, connect the straight door arm section to the door bracket with the 5/16"x1-1/4"... -
Page 23: Adjustment
ADJUSTMENT STEP 1 Adjust the UP and DOWN Travel Limits Limit adjustment settings regulate the points at which the door will stop when moving up or down. To operate the opener, press the Door Control push bar. Run the opener through a complete travel cycle. •... -
Page 24: Adjust The Force
ADJUSTMENT STEP 2 Adjust the Force Force adjustment controls are located on the back panel of the motor unit. Force adjustment settings regulate the amount of power required to open and close the door. If the forces are set too light, door travel may be interrupted by nuisance reversals in the down direction and stops in the up direction. -
Page 25: Test The Safety Reversal System
The door will not move more than an inch (2.5 cm), and the opener lights will flash. The garage door opener will not close from a remote if the indicator light in either sensor is off (alerting you to the fact that the sensor is misaligned or obstructed). -
Page 26: Operation
• The wall-mounted Door Control: Hold the push button or bar down until the door starts to move. • The Keyless Entry (See Accessories): If provided with your garage door opener, it must be programmed before use. See Programming. When the opener is activated (with the safety reversing sensor correctly installed and aligned) 1. -
Page 27: Using The Wall-Mounted Door Control
Using the Wall-Mounted Door Control THE MULTI-FUNCTION DOOR CONTROL Press the push bar to open or close the door. Press again to reverse the door during the closing cycle or to stop the door while it's opening. Light feature Press the Light button to turn the opener light on or off. -
Page 28: Care Of Your Garage Door Opener
CARE OF YOUR OPENER LIMIT AND FORCE ADJUSTMENTS: Weather conditions may cause some minor changes in door operation requiring some re- adjustments, particularly during the first year of operation. Pages 23 and 24 refer to the limit and force adjustments. Only a screwdriver is required. -
Page 29: Having A Problem
5. My lights will not turn off when door is open: • The garage door opener is equipped with a security light feature. This feature activates the light on when the safety sensor beam has been obstructed. Refer to Operation section;... -
Page 30: Diagnostic Chart
Unplug to reset. 6 FLASHES Motor Circuit Failure. Replace Receiver Logic Board. Your garage door opener is programmed with self-diagnostic "Learn" capabilities. The “Learn” button/diagnostic LED will flash a Button number of times then pause signifying it has found a potential issue. -
Page 31: Programming
The owner of the copyright in the garage door opener does not authorize the purchaser or supplier of the non-rolling code transmitter to circumvent that technical measure. -
Page 32: To Add, Reprogram Or Change A Keyless Entry Pin
To Add, Reprogram or Change a Keyless Entry PIN NOTE: Your new Keyless Entry must be programmed to operate your garage door opener. USING THE “LEARN” BUTTON 1. Press and release the “learn” button on motor unit. The learn indicator light will glow steadily for 30 seconds. -
Page 33: Repair Parts
REPAIR PARTS Rail Assembly Parts Installation Parts KEY PART 41A5273-1 371LM 10A20 29B137 41A2828 41B4494-1 41A4353 41A5047 178B35 178B34 41A5034 41A5266-1 41A2770-6 114A3080 114A3080SP Owner’s manual – Spanish PART DESCRIPTION 4A1008 Master link kit 41A4813 Chain pulley bracket 41A3489 Complete trolley assembly 1707LM One-piece rail 7' (2.1 m) 1708LM... -
Page 34: Motor Unit Assembly Parts
Motor Unit Assembly Parts KEY PART NO. NO. DESCRIPTION 31D380 Sprocket cover 41C4220A Gear and sprocket assembly Complete with: Spring washer, thrust washer, retaining ring, bearing plate, roll pins (2), drive gear and worm gear, helical gear with retainer and grease 41A2817 Drive/worm gear kit with grease, roll pins (2) -
Page 35: Accessories
Includes battery. 975LM Laser Park Assist: Laser enables homeowners to precisely park vehicles in the garage. 990LM Surge Protector: The Garage Door Opener Surge Protector is designed to protect LiftMaster damage from lightning and power surges. ® ® 3-Button Remote ®... -
Page 36: Repair Parts And Service
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 is free from defect in materials and/or workmanship for a period of one year from the date of purchase [and that the motor is free from defect in materials and/or workmanship for a period of four years from the date of purchase].