Instruction/ maintenance manual of the product 3280M Chamberlain
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The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1 196 www .liftmaster .com GARAGE DOOR OPENER Model 3280M 1/2HP 3280M-267 1/2HP For Residential Use Only Owner’ s Manual ■ Please read this manual and the enc losed safety materials carefully! ■ Fasten the man ual near the garage door after installation.
2 Introduction 2-5 Safety symbol and signal word review . . . . . . . . . . . . . . . 2 Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . . 3 T ools needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Planning .
3 Preparing your garage door Before you begin: • Disable locks. • Remove any ropes connected to garage door. • Complete the following test to make sure your garage door is balanced and is not sticking or binding: 1. Lift the door about halfway as shown.
4 FINISHED CEILING Support bracket & fastening hardware is required. See page 12. Safety Reversing Sensor Header Wall Access Door Safety Reversing Sensor Wall- mounted Door Control Motor Unit Gap .
5 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. If anything is missing, carefully check the packing material. Parts may be stuck in the foam.
6 ASSEMBLY STEP 1 Attach the Rail to the Motor Unit To avoid installation difficulties, do not run the garage door opener until instructed to do so. • Remove the two washered bolts mounted in top of motor unit. • Align rail and styrofoam over sprocket.
7 INSTALLATION IMPOR T ANT INST ALLA TION INSTR UCTIONS T o reduce the risk of SEVERE INJUR Y or DEA TH: WARNING WARNING WARNING WARNING 1. READ AND FOLLOW ALL INSTALLATION WARNINGS AND INSTRUCTIONS. 2. Install garage door opener ONLY on properly balanced and lubricated garage door.
8 INSTALLATION STEP 1 Determine the Header Bracket Location Installation procedures vary according to garage door types. Follow the instructions which apply to your door. 1. Close the door and mark the inside vertical centerline of the garage door. 2.
9 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.
Header Bracket Belt Pulley Bracket Temporary Support Header Wall Garage Door Clevis Pin 5/16"x2-3/4" Ring Fastener Header Bracket Belt Pulley Bracket Rail 10 Clevis Pin 5/16"x2-3/4" Ring Fastener INSTALLATION STEP 3 Attach the Rail to the Header Bracket • Position the opener on the garage floor below the header bracket.
11 ONE-PIECE DOOR WITHOUT TRA CK A 2x4 on its side is convenient for setting an ideal door-to- rail distance. • Remove foam packaging. • Raise the opener onto a stepladder. You will need help at this point if the ladder is not tall enough. • Open the door all the way and place a 2x4 on its side on the top section of the door beneath the rail.
12 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.
13 To prevent possible SERIOUS INJURY or DEATH from electrocution: • Be sure power is not connected BEFORE installing door control. • Connect ONLY to 24 VOLT low voltage wires.
14 INSTALLATION STEP 7 Install the Light • Press the release tabs on both sides of lens. Gently rotate lens back and downward until the lens hinge is in the fully open position. Do not remove the lens. • Install a 100 watt maximum light bulb in each socket.
15 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.
16 Invisible Light Beam Protection Area Safety Reversing Sensor 6" (15 cm) max. above floor Safety Reversing Sensor 6" (15 cm) max. above floor Facing the door fr om inside the garage INSTAL.
17 DOOR TRA CK MOUNT (RIGHT SIDE) Indicator Light Lens Lip Sensor Brack et Door T rack FLOOR MOUNT (RIGHT SIDE) W ALL MOUNT (RIGHT SIDE) Indicator Light Sensor Brack et Lens Extension Brack et (See Ac.
18 Carriage Bolt 1/4"-20x1/2" Lens Wing Nut 1/4"-20 Figure 5 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.
19 Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of door bracket. Contact your door manufacturer for reinforcement kit. INSTALLATION STEP 11 Fasten the Door Bracket Follow instructions which apply to your door type as illustrated below or on the following page.
20 Header Wall Vertical Centerline of Garage Door Finished Ceiling Optional Placement of Door Bracket Header Bracket Door Bracket 2x4 Support For a door with no exposed framing, or for the optional installation, use lag screws 5/16"x1-1/2" (Not Provided) to fasten door bracket.
21 INSTALLATION STEP 12 Connect Door Arm to T rolley Follow instructions which apply to your door type as illustrated below and on the following page. SECTIONAL DOORS ONL Y Make sure garage door is fully closed. Pull the emergency release handle to disconnect the outer trolley from the inner trolley.
22 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" clevis pin.
23 ADJUSTMENT STEP 1 Adjust the UP and DOWN T ravel 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.
24 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.
25 ADJUSTMENT STEP 3 T est the Safety Reversal System TEST • With the door fully open, place a 1-1/2" (3.8 cm) board (or a 2x4 laid flat) on the floor, centered under the garage door. • Operate the door in the down direction. The door must reverse on striking the obstruction.
26 OPERATION Using Y our Garage Door Opener Your Security ✚ ® opener and hand-held remote control have been factory-set to a matching code which changes with each use, randomly accessing over 100 billion new codes. Your opener will operate with up to eight Security ✚ ® remote controls and one Security ✚ ® Keyless Entry System.
27 T o Open the Door Manually The door should be fully closed if possible. Pull down on the emergency release handle and lift the door manually. To reconnect the door to the opener, press the door control push bar. The lockout feature prevents the trolley from reconnecting automatically.
28 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.
29 HAVING A PROBLEM? 1. My door will not close and the light bulbs blink on my motor unit: The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. • Verify the safety sensors are properly installed, aligned and free of any obstructions.
Bell Wire Diagnostics Located On Motor Unit LED or Diagnostic LED "Learn" Button Safety Reversing Sensor 30 Installed Safety Reversing Sensor Your garage door opener is programmed with self-diagnostic capabilities. The “Learn” button/diagnostic LED will flash a number of times then pause signifying it has found a potential issue.
LOCK L I GHT 31 *3-Button Remotes (315 MHz) If provided with your garage door opener, the large button is factory programmed to operate it. Additional buttons on any Security ✚ ® 3-Button remote or compact remote can be programmed to operate other Security ✚ ® garage door openers.
LOCK L IG HT 32 1. Enter a four digit personal identification number (PIN) of your choice on the keypad. Then press and hold ENTER. 2. While holding the ENTER button, press and hold the LIGHT button on the Multi-Function Door Control.
2 4 5 1 3 6 7 33 REPAIR PARTS Rail Assembly Parts KEY P ART NO . NO . DESCRIPTION 1 4A1008 Master link kit 2 41B5424 Belt pulley bracket 3 41B3869-3A Complete trolley assembly 4 2777BD One-piece rail 7' (2.
34 Motor Unit Assembly Parts 2 10 8 13 14 15 19 4 5 3 9 16 12 7 18 11 17 1 6 6 7 DN UP Brown Wire (Down) Contact LIMIT SWITCH ASSY . Grey Wire Y ellow Wire (Up) Contact Center Limit Contact Drive Gear KEY P ART NO . NO . DESCRIPTION 1 41A4371 Belt cap retainer 2 41A4885-5 Gear and sprocket assembly .
35 ACCESSORIES 370LM 3-Button Mini-Remote Control with Security ✚ ® : With key ring and fastening strip. 902LM/903LM 2 & 3 Door Multi-Function Wall Control: Ideal for homes with up to three garage doors. Combine up to three controls into one wall control panel for a neat compact appearance.
© 2008, The Chamberlain Group, Inc. 1 14A3737B All Rights Reserved LIFTMASTER ® SER VICE IS ON CALL OUR LARGE SER VICE ORGANIZA TION SP ANS AMERICA INST ALLA TION AND SER VICE INFORMA TION IS AS NEAR AS Y OUR TELEPHONE . SIMPL Y DIAL OUR TOLL FREE NUMBER: 1-800-528-9131 www .
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