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Chamberlain 3280M - page 1
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. ■ The door WILL N ...
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Chamberlain 3280M - page 2
2 Introduction 2-5 Safety symbol and signal word review . . . . . . . . . . . . . . . 2 Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . . 3 T ools needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Carton inventory . ...
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Chamberlain 3280M - page 3
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. Release the door. If balanced, it should stay in place, supported entirely by its springs. ...
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Chamberlain 3280M - page 4
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 between floor and bottom of door must not exceed 1/4" (6 mm) ONE-PIECE DOOR WITHOUT TRA CK Safety Reversing Sensor Horizontal and vertical reinfo ...
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Chamberlain 3280M - page 5
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. Hardware for installation is also listed below. Carton Inventor y Straight Door Arm Section C ...
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Chamberlain 3280M - page 6
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. Cut tape from rail, belt and styrofoam. • REMOVE STYROFOAM. • Insert washered bolts throu ...
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Chamberlain 3280M - page 7
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. An improperly balanced door may not reverse when required and coul ...
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Chamberlain 3280M - page 8
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. Extend the line onto the header wall above the door. You can fasten the header bracket within 4 fe ...
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Chamberlain 3280M - page 9
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. If installing into masonry, use concrete anchors (not provided). W ALL HEADER B ...
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Chamberlain 3280M - page 10
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. Use pa ...
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Chamberlain 3280M - page 11
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. ...
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Chamberlain 3280M - page 12
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. This bracket and fastening hardware are n ...
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Chamberlain 3280M - page 13
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. To prevent possible SERIOUS INJURY or DEATH from a closing garage door: • Install door control within sight of garage door, out of reach of children at a minimum heigh ...
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Chamberlain 3280M - page 14
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. Light bulb size should be A19, standard neck only. The lights will turn ON and remain li ...
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Chamberlain 3280M - page 15
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. If the plug doesn’t fit into the outlet you have, contact a ...
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Chamberlain 3280M - page 16
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 INSTALLATION STEP 10 Install The Protector System ® The safety reversing sensor must be connected and aligned correctly before the garage door opener will ...
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Chamberlain 3280M - page 17
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 Accessories) Inside Garage W all (Provided with Extension Brack et) (Provided with Extension Brack et) Figure 1 Figure 2 Figure 3 Figure 4 W ALL MOUNT ( ...
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Chamberlain 3280M - page 18
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. Be sure the lens is not obstructed by a ...
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Chamberlain 3280M - page 19
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. A horizontal reinforcement brace ...
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Chamberlain 3280M - page 20
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. METAL DOOR Top of Door (Inside Garage) Door Bracket Optional ...
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Chamberlain 3280M - page 21
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. Slide the outer trolley back (away from the door ...
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Chamberlain 3280M - page 22
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. • Secure with a ring fastener. 2. Adju ...
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Chamberlain 3280M - page 23
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. • Does the door open and close completely? • Does the door stay closed and not revers ...
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Chamberlain 3280M - page 24
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. Weathe ...
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Chamberlain 3280M - page 25
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. ADJUST • If the door stops on the obstruction, it is not trave ...
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Chamberlain 3280M - page 26
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. If you purch ...
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Chamberlain 3280M - page 27
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. Pull the emergency release handle down and back (toward the o ...
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Chamberlain 3280M - page 28
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. Only a screwdriver is required. Follow the instructions carefully. Repeat the safety reverse t ...
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Chamberlain 3280M - page 29
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. Refer to Installation Step 10: Insta ...
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Chamberlain 3280M - page 30
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. Cons ...
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Chamberlain 3280M - page 31
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. T o Erase All Codes Fr om Motor Unit Memory To deactivate any ...
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Chamberlain 3280M - page 32
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. 3. Continue holding the ENTER and LIGHT buttons while you press the push bar on the Multi-Function Door Control (al ...
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Chamberlain 3280M - page 33
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' (2.1 m) 2778BD Complete rail 8' (2.4 m) 2770BD Complete rail 10' (3 m) 5 41A5434-1 1 Full belt assembly 6 41B4103 T ensioner assembl ...
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Chamberlain 3280M - page 34
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 ., Complete with: Spring washer; Thrust washer; Re ...
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Chamberlain 3280M - page 35
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. Enhanced functions include Lock Feature to lock out ...
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Chamberlain 3280M - page 36
© 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 .liftmaster .com For prof essional installation, parts and service, conta ...
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