Table of Contents
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GARAGE DOOR OPENER
Models 3850
3850-267
For Residential Use Only
Owner's Manual
Please read this manual and the enclosed safety materials carefully!
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Fasten the manual near the garage door after installation.
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The door WILL NOT CLOSE unless the Protector System
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Periodic checks of the opener are required to ensure safe operation.
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The model number label is located under the light lens on the left side panel of your opener.
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®
®
is connected and properly aligned.
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
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Table of Contents
Troubleshooting
Related Manuals for Chamberlain 3850
Summary of Contents for Chamberlain 3850
- Page 1 The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.liftmaster.com ® GARAGE DOOR OPENER Models 3850 3850-267 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
TABLE OF CONTENTS Operation 26-33 Introduction Operation safety instructions ......26 Safety symbol and signal word review ..... 2 Using garage door opener . -
Page 3: Preparing Your Garage Door
Preparing your garage door Before you begin: To prevent possible SERIOUS INJURY or DEATH: • Disable locks. • ALWAYS call a trained door systems technician if garage • Remove any ropes connected to garage door. door binds, sticks, or is out of balance. An unbalanced •... -
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 required. You may find it helpful to refer back to this page and the accompanying illustrations as you proceed with the installation of your opener. -
Page 5: Carton Inventory
Standby Power System 3850-267 (2) (Packed Separately) (battery) Belt Belt Cap Retainer ® SECURITY✚ Keyless Entry Model 3850-267 (1) ONLY Motor Unit with Light Lenses One-Piece Rail Door Bracket 2-Conductor Bell Wire White & White/Red Trolley Header Bracket Curved Door... -
Page 6: Assembly
ASSEMBLY STEP 1 Attach the Rail to the Motor Unit To avoid SERIOUS damage to opener, ONLY use bolts To avoid installation difficulties, do not run the garage door mounted in top of motor unit. opener until instructed to do so. •... -
Page 7: Attach The Belt Cap Retainer
ASSEMBLY STEP 3 Attach the Belt Cap Retainer To avoid possible SERIOUS INJURY to fingers from moving • Position the belt cap retainer over the motor unit belt pulley so garage door opener: the three holes in cap align with the three holes in mounting •... -
Page 8: Determine The Header Bracket Location
INSTALLATION STEP 1 Unfinished Determine the Header Bracket Location Ceiling OPTIONAL CEILING MOUNT HEADER BRACKET To prevent possible SERIOUS INJURY or DEATH: Header Wall • Header bracket MUST be RIGIDLY fastened to structural Vertical Centerline support on header wall or ceiling, otherwise garage door of Garage Door might not reverse when required. -
Page 9: Install The Header Bracket
INSTALLATION STEP 2 Install the Header Bracket Wall Mounting Holes You can attach the header bracket either to the wall above the garage door, or to the ceiling. Follow the instructions which will CEILING MOUNT ONLY work best for your particular requirements. Do not install the The nail hole is for positioning only. -
Page 10: Attach The Rail To The Header Bracket
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. NOTE: If the door spring is in the way you’ll need help. Have Header Wall someone hold the opener securely on a temporary support to Header... -
Page 11: Position The Opener
INSTALLATION STEP 4 Position the Opener To prevent damage to garage door, rest garage door opener Follow instructions which apply to your door type as illustrated. rail on 2x4 placed on top section of door. SECTIONAL DOOR OR ONE-PIECE DOOR WITH TRACK A 2x4 laid flat is convenient for setting an ideal door-to-rail distance. -
Page 12: Hang The Opener
INSTALLATION STEP 5 Hang the Opener To avoid possible SERIOUS INJURY from a falling garage door Three representative installations are shown. Yours may be opener, fasten it SECURELY to structural supports of the different. Hanging brackets should be angled (Figure 1) to provide garage. -
Page 13: Install The Smart Control Panel
INSTALLATION STEP 6 ® Install the Smart Control Panel To prevent possible SERIOUS INJURY or DEATH from Locate door control within sight of door, at a minimum height of electrocution: 5 feet (1.5 m) where small children cannot reach, away from •... -
Page 14: Install The Evercharge Standby Power System (Optional)
INSTALLATION STEP 7 ® Install the EverCharge ALWAYS wear protective gloves and eye protection when Standby Power System (optional) changing the battery or working around the battery • Make sure motor unit is unplugged. compartment. • Using a Phillips head screwdriver, remove the battery cover on the motor unit. -
Page 15: Attach The Emergency Release Rope And Handle
INSTALLATION STEP 9 Attach the Emergency Release Rope and Handle To prevent possible SERIOUS INJURY or DEATH from a falling • Thread one end of the rope through the hole in the top of the garage door: red handle so “NOTICE” reads right side up as shown. Secure •... -
Page 16: Install The Protector System
INSTALLATION STEP 11 ® Install The Protector System Be sure power is not connected to the garage door opener The safety reversing sensor must be connected and aligned BEFORE installing the safety reversing sensor. correctly before the garage door opener will move in the down To prevent SERIOUS INJURY or DEATH from a closing garage direction. - Page 17 INSTALLING THE BRACKETS Figure 1 DOOR TRACK MOUNT (RIGHT SIDE) 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. Door Track They may be installed in one of three ways, as follows.
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Page 18: Safety Sensors Troubleshooting
MOUNTING AND WIRING THE SAFETY REVERSING SENSORS Figure 5 Wing Nut • Slide a 1/4"-20x1/2" carriage bolt head into the slot on each 1/4"-20 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). -
Page 19: Fasten The Door Bracket
INSTALLATION STEP 12 Fasten the Door Bracket Fiberglass, aluminum or lightweight steel garage doors WILL Follow instructions which apply to your door type as illustrated REQUIRE reinforcement BEFORE installation of door bracket. below or on the following page. Contact your door manufacturer for reinforcement kit. A horizontal reinforcement brace should be long enough to be secured to two or three vertical supports. - 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 13 Connect Door Arm to Trolley Inner Trolley Follow instructions which apply to your door type as illustrated below and on the following page. Outer Trolley SECTIONAL DOORS ONLY Clevis Pin Make sure garage door is fully closed. Pull the emergency release 5/16"x1"... - Page 22 ALL ONE-PIECE DOORS 1. Assemble the Door Arm: Figure 4 • Fasten the straight and curved door arm sections together to Door the longest possible length (with a 2 or 3 hole overlap). Bracket Ring Fastener • Make sure the garage door is fully closed. Connect the Nuts Lock 5/16"-18...
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Page 23: Adjustment
ADJUSTMENT STEP 1 Program the Travel Limits Without a properly installed safety reversal system, persons Travel limits regulate the points at which the door will stop (particularly small children) could be SERIOUSLY INJURED or when moving up or down. KILLED by a closing garage door. •... -
Page 24: Set The Force
ADJUSTMENT STEP 2 Set the Force Without a properly installed safety reversal system, persons The force setting measures the amount of force required to (particularly small children) could be SERIOUSLY INJURED or open and close the door. KILLED by a closing garage door. 1. -
Page 25: Test The Safety Reversal System
ADJUSTMENT STEP 3 Test the Safety Reversal System Without a properly installed safety reversal system, persons TEST (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door. • 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. -
Page 26: Operation
WARNING OPERATION IMPORTANT SAFETY INSTRUCTIONS WARNING WARNING To reduce the risk of SEVERE INJURY or DEATH: 1. READ AND FOLLOW ALL WARNINGS AND INSTRUCTIONS. 9. If one control (force or travel limits) is adjusted, the other control may also need adjustment. 2. -
Page 27: Using The Wall-Mounted Door Control
Using the Wall-Mounted Door Control (PROG) Learn Feature The door control is equipped with a PROG <LEARN> button to ® THE SMART CONTROL PANEL assist in learning remote controls to the unit. Press the PROG Press the push bar to <LEARN>... -
Page 28: Using The Remote Control
The Remote Control Battery Using the Remote Control NOTE: To activate the remote control functions, pull out the plastic pull tab protruding from the remote control housing. This remote control is equipped with a proximity lighting feature. To prevent possible SERIOUS INJURY or DEATH: When moving a hand within close proximity to the remote •... -
Page 29: Evercharge ® Standby Power System (Optional)
To test the battery, disconnect the motor unit power cord from performing ANY service or maintenance. the electrical outlet. • Use ONLY LiftMaster part number 485LM for replacement • A solid orange LED indicates the battery is operating on battery battery. -
Page 30: To Open The Door Manually
To Open the Door Manually Care of Your Opener MAINTENANCE SCHEDULE Once a Month To prevent possible SERIOUS INJURY or DEATH from a falling • Manually operate door. If it is unbalanced or binding, call a garage door: trained door systems technician. •... -
Page 31: Having A Problem (Troubleshooting)
Having a Problem (Troubleshooting) NOTE: Always unplug battery prior to troubleshooting. 1. My door will not close and the light bulbs blink on my motor Bell Wire unit: The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. -
Page 32: Diagnostic Chart
Bell Wire Diagnostics Located On Installed Motor Unit Safety Reversing Sensor “Learn” Button LED or Diagnostic Your garage door opener is programmed with self-diagnostic capabilities. The “Learn” button/diagnostic LED will flash a number of “Learn” Button times then pause signifying it has found a potential issue. Consult Safety Reversing Sensor Diagnostic Chart below. -
Page 33: Smart Control Panel ® Messages
® Smart Control Panel Messages The following messages are contained within the Smart Control Panel ® and may appear during the operations of the unit: Message Meaning: This message will appear if the Safety Reversing Sensors are out of alignment, if they are blocked or if the wiring is disconnected. To clear message SAFETY SENSORS CHECK from door control do the following: ALIGNMENT, BLOCKAGE OR... -
Page 34: Programming
PROGRAMMING NOTICE: If this Security ✚ ® garage door opener is operated with a non-rolling code remote control, the technical measure in the receiver of the garage door opener, which provides security against code-theft devices, will be circumvented. The owner of the copyright in the garage door opener does not authorize the purchaser or supplier of the non-rolling code remote control to circumvent that technical measure. -
Page 35: 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 USING THE DOOR CONTROL LO C LI G NOTE: This method requires two people if the Keyless Entry is 1. -
Page 36: Repair Parts
REPAIR PARTS Rail Assembly Parts PART DESCRIPTION 4A1008 Master link kit 41B5424 Belt pulley bracket 41B3869-3A Complete trolley assembly 2777BD One-piece Rail 7 feet (2.1 m) 2778BD One-piece Rail 8 feet (2.4 m) 2770BD One-piece Rail 10 feet (3 m) 41A5434-11 Full belt assembly 41B4103... -
Page 37: Motor Unit Assembly Parts
Motor Unit Assembly Parts PART PART DESCRIPTION DESCRIPTION 41C76 Belt cap and sprocket 41A6231 End panel with battery door and screw 41B4245 Line cord 41C190 Transformer and harness 41B4375-3 Terminal block with screws 41D504-4 Cover 41A6281 Wire harness kit 108D79 Light lens 41D794 Motor with positioning sensor... -
Page 38: Accessories
Tells you if your garage door is open or closed. Monitors up to 4 garage doors by Provides backup power to the garage door adding additional sensor modules. opener. For use with model 3850 only. 395LM Remote Light Control 975LM... -
Page 39: Notes
NOTES... -
Page 40: Repair Parts And Service
SERVICE INFORMATION For professional installation, parts and service, contact your local TOLL FREE NUMBER: LIFTMASTER/CHAMBERLAIN dealer. Look for him in the Yellow Pages, or call our Service number for a list of dealers in your area. 1-800-528-9131 LIFTMASTER FIVE YEAR LIMITED WARRANTY...