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Chamberlain 3240M 1/2 HP - page 1
The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.liftmaster.com GARAGE DOOR OPENER Models 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 p ...
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Chamberlain 3240M 1/2 HP - page 2
2 Introduction 2-5 Safety symbol and signal word review . . . . . . . . . . . . . . . 2 Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . . 3 Tools needed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Planning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Carton inventory ...
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Chamberlain 3240M 1/2 HP - page 3
3 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. To prevent possible SERIOUS INJURY or DEATH: • ALWAYS call a trained door systems technician if garage door binds, sticks, or is out of balance. An ...
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Chamberlain 3240M 1/2 HP - page 4
4 — — — — — — — — SECTIONAL DOOR INSTALLATION 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 required. You may fi nd it helpful to refer back to this page and the accompanying illustrations as you procee ...
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Chamberlain 3240M 1/2 HP - page 5
5 UP CEILING MOUNT ONLY 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 Inventory RAIL A ...
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Chamberlain 3240M 1/2 HP - page 6
6 ASSEMBLY STEP 1 Fasten the Rail to the Motor Unit To avoid installation diffi culties, do not run the garage door opener until instructed to do so. To aid in assembly and installation, replace the foam packing around the motor unit. Remove it after Installation Step 4. • Working on a level surface, align the rail assembly with the motor unit, ...
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Chamberlain 3240M 1/2 HP - page 7
7 INSTALLATION IMPORTANT INSTALLATION INSTRUCTIONS To reduce the risk of SEVERE INJURY or DEATH: 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 could result ...
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Chamberlain 3240M 1/2 HP - 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 3240M 1/2 HP - 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). WALL HEADER BR ...
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Chamberlain 3240M 1/2 HP - page 10
10 INSTALLATION STEP 3 Attach the Rail to the Header Bracket • Position the opener on the garage fl oor below the header bracket. Use packing material as a protective base. NOTE: If the door spring is in the way you’ll need help. Have someone hold the opener securely on a temporary support to allow the rail to clear the spring. • Position th ...
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Chamberlain 3240M 1/2 HP - page 11
11 INSTALLATION STEP 4 Install The Protector System ® The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR When properly connected and aligned, the sensor will detect an obstacle in the path of its electronic beam. ...
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Chamberlain 3240M 1/2 HP - page 12
12 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 fl oor. They may be installed in one of three ways, as follows: Garage door track installation (preferred): • Slip the curved arm ...
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Chamberlain 3240M 1/2 HP - page 13
13 Wing Nut Wing Nut 1/4"-20 Staples Carriage Bolt 1/4"-20x1/2" Carriage Bolt 1/4"-20x1/2" Lens MOUNTING AND WIRING THE SAFETY 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 su ...
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Chamberlain 3240M 1/2 HP - page 14
14 ONE-PIECE DOOR WITHOUT TRACK 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 3240M 1/2 HP - page 15
15 INSTALLATION STEP 6 Hang the Opener Three representative installations are shown. Yours may be different. Hanging brackets should be angled (Figure 1) to provide rigid support. On fi nished ceilings (Figure 2 and Figure 3), attach a sturdy metal bracket to structural supports before installing the opener. This bracket and fastening hardware are ...
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Chamberlain 3240M 1/2 HP - page 16
16 INSTALLATION STEP 7 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 fl at. If installing into drywall (Figure 1), drill 5/32" holes and use anch ...
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Chamberlain 3240M 1/2 HP - page 17
17 INSTALLATION STEP 8 Install the Lights • 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 l ...
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Chamberlain 3240M 1/2 HP - page 18
18 INSTALLATION STEP 10 Electrical Requirements To avoid installation diffi culties, 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 fi t into a grounding type outlet. If the plug doesn’t fi t into the outlet you have, co ...
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Chamberlain 3240M 1/2 HP - page 19
19 INSTALLATION STEP 12 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. Figure 1 shows one piece of ...
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Chamberlain 3240M 1/2 HP - page 20
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. • Metal Doors: Drill 3/16" pilot holes ...
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Chamberlain 3240M 1/2 HP - page 21
21 Straight Door Arm Straight Door Arm Curved Door Arm Curved Door Arm (Groove facing out) CORRECT INCORRECT Nuts 5/16"-18 Lock Washers 5/16" Bolts 5/16"-18x7/8" Door Bracket INSTALLATION STEP 13 Connect Door Arm to Trolley Follow instructions which apply to your door type as illustrated below and on the following page. SECTIONA ...
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Chamberlain 3240M 1/2 HP - page 22
22 ALL ONE-PIECE DOORS 1. Assemble the door arm, Figure 5: IMPORTANT: The groove on the straight door arm MUST face away from the curved door arm (Figure 5). • 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 th ...
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Chamberlain 3240M 1/2 HP - page 23
23 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. • Does the door open and close completely? • Does the door stay closed and not reverse ...
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Chamberlain 3240M 1/2 HP - 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 3240M 1/2 HP - page 25
25 ADJUSTMENT STEP 3 Test the Safety Reversal System TEST • With the door fully open, place a 1-1/2" (3.8 cm) board (or a 2x4 laid fl at) on the fl oor, 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 tr ...
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Chamberlain 3240M 1/2 HP - page 26
26 OPERATION Using Your 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 purcha ...
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Chamberlain 3240M 1/2 HP - page 27
27 To Open the Door Manually DISCONNECT TROLLEY: The door should be fully closed if possible. Pull down on the emergency release handle (so that the trolley release arm snaps into a vertical position) and lift the door manually. The lockout feature prevents the trolley from reconnecting automatically, and the door can be raised and lowered manually ...
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Chamberlain 3240M 1/2 HP - page 28
28 THE REMOTE CONTROL BATTERY The lithium battery should produce power for up to 5 years. To replace battery, use the visor clip or screwdriver blade to pry open the case as shown. Insert battery positive side up (+). Dispose of old battery properly. Replace the battery with only 3V2032 coin cell batteries. Care of Your Opener LIMIT AND FORCE ADJUS ...
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Chamberlain 3240M 1/2 HP - 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 reversing sensors are properly installed, aligned and free of any obstructions. Refer to Installation Step ...
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Chamberlain 3240M 1/2 HP - page 30
30 KG KG Your garage door opener is programmed with self-diagnostic capabilities. The “Learn” button/diagnostic LED will fl ash a number of times then pause signifying it has found a potential issue. Consult Diagnostic Chart below. Installed Safety Reversing Sensor Safety Reversing Sensor Diagnostics Located On Motor Unit LED or Diagnostic LED ...
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Chamberlain 3240M 1/2 HP - page 31
31 KG 1 3 9 7 5 KG 1 3 9 7 5 LOCK LIGHT *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 mini-remote can be programmed to operate other Security ✚ ® garage door openers. To Erase All Codes From Motor Unit Memory ...
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Chamberlain 3240M 1/2 HP - page 32
32 LOCK LIGHT 1. Enter a four digit personal identifi cation 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 3240M 1/2 HP - page 33
33 UP CEILING MOUNT ONLY KEY PART NO. NO. DESCRIPTION 1 41A5273-1 Multi-function door control (3240M) 2 41A4166 Lighted door control button (3130M) 3 41A2828 Emergency release rope & handle 4 371LM 1-button remote control (3130M) 5 373LM 3-button remote control (3240M) 6 10A20 3V 2032 Lithium battery (1 required) 7 29B137 Visor clip 8 41A5047 D ...
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Chamberlain 3240M 1/2 HP - page 34
34 Motor Unit Assembly Parts 1 2 3 4 5 6a 6 7 12 11 13 14 14 9 10 9a 8 DN UP (Up) Contact (Down) Contact Center Limit Contact Yellow Wire Brown Wire Drive Gear LIMIT SWITCH ASSEMBLY Grey Wire KEY PART NO. NO. DESCRIPTION 1 31C568 Drive shaft cover 2 41B4245 Line cord 3 30B620 Capacitor – 1/2 HP 30B638 Capacitor – 1/3 HP 4 41A3150 Terminal block ...
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Chamberlain 3240M 1/2 HP - page 35
35 LOCK LIGHT 59LM Outside Keylock: Operates the garage door automatically from the outside when remote control is not handy. 373LM Motion Detecting Control Panel: Multi-function door control with motion sensor that automatically turns opener lights on for 5 minutes when it detects a person entering the garage. Sensor can be easily deactivated when ...
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Chamberlain 3240M 1/2 HP - page 36
36 © 2011, The Chamberlain Group, Inc. 114A4262 All Rights Reserved LIFTMASTER 1 YEAR LIMITED WARRANTY LIFETIME MOTOR WARRANTY (MODEL 3240M) 2 YEAR LIMITED MOTOR WARRANTY (MODEL 3130M) The Chamberlain Group, Inc. (“Seller”) warrants to the fi rst retail purchaser of this product, for the residence in which this product is originally installed ...
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