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The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
®
GARAGE DOOR OPENER
Model 3850PC
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 is connected and properly
aligned.
■ Periodic checks of the opener are required to ensure safe operation.
■
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TABLE OF CONTENTS Introduction 2-5Adjustment 23-25 Safety symbol and signal word review. . . . . . . . . . . . . . .2 Program the travel limits . . . . . . . . . . . . . . . . . . . . . . . .23 Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . .3 Setting the force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 Tools needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Test the safety reversal system . . . . . . . . . . . . . . . . .
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1 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 garage door may not reverse when required. � Complete the f ollowing test to make sure your garage door is balanced and is not sticking or binding: • NEVER try to loosen, move or adjust garage door, door springs, cables, pull
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— — — — — — — — 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. FINISHED CEILING SECTIONAL DOOR INSTALLATION Support bracket & fastening hardware is required. Horizontal and vertical reinforcement See pag
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LOCK LIGHT Carton Inventory Your garage door opener is packaged in two cartons which anything is missing, carefully check the packing material. contain the motor unit and all parts illustrated below. Parts may be stuck in the foam. Hardware for installation Accessories will depend on the model purchased. If is also listed below. Remote Control Visor Clip ® SECURITY 3-Button Remote Control Styrofoam Smart Control Panel™ Battery (Optional) Belt Belt Cap Retainer Motor Unit w/Light Lenses One-
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ASSEMBLY STEP 1 Attach the Rail to the Motor Unit To avoid SERIOUS damage to opener, ONLY use bolts mounted in top of motor unit. To avoid installation difficulties, do not run the garage door opener until instructed to do so. � Remove the two washered bolts mounted on top of motor unit. � Align rail and styrofoam over belt pulley. Cut tape from rail, belt and styrofoam. � REMOVE STYROFOAM. USE ONLY THIS TYPE AND SIZE � Insert both washered bolts through the rail into the BOLT motor un
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ASSEMBLY STEP 3 Attach the Belt Cap Retainer To avoid possible SERIOUS INJURY to fingers from moving garage door opener: � Position the belt cap retainer over the motor unit belt • ALWAYS keep hand clear of belt pulley while operating pulley so the three holes in cap align with the three opener. holes in mounting plate. Attach with #8x3/8" hex screws • Securely attach belt pulley cover BEFORE operating. provided. You have now finished assembling your garage door opener. Please read the f
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Unfinished INSTALLATION STEP 1 OPTIONAL Ceiling CEILING Determine the Header Bracket MOUNT FOR Location HEADER BRACKET Header Wall 2x4 Vertical Centerline of Garage Door To prevent possible SERIOUS INJURY or DEATH: 2x4 • Header bracket MUST be RIGIDLY fastened to structural Structural Supports support on header wall or ceiling, otherwise garage door might not reverse when required. DO NOT install header bracket over drywall. • Concrete anchors MUST be used if mounting header bracket or 2x
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INSTALLATION STEP 2 Install the Header Bracket Wall Mounting Holes You can attach the header bracket either to the wall above CEILING MOUNT ONLY The nail hole is for the garage door, or to the ceiling. Follow the instructions positioning only. You must use lag screws which will work best for your particular requirements. Do UP to mount the header bracket. not install the header bracket over drywall. If installing into masonry, use concrete anchors (not provided). WALL HEADER BRACKET INSTALLA
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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 Header Wall base. NOTE: If the door spring is in the way you’ll need help. Have someone hold the opener securely Header on a temporary support to allow the rail to clear Bracket the spring. Belt Pulley � Position the rail bracket against the header bracket. Bracket � Align the bracket holes and join with a clevis pin as shown.
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INSTALLATION STEP 4 Position the Opener To prevent damage to garage door, rest garage door opener rail on 2x4 placed on top section of door. Follow instructions which apply to your door type as illustrated. SECTIONAL DOOR OR ONE-PIECE DOOR WITH TRACK A 2x4 laid flat is convenient for setting an ideal door-to-rail distance. � Remove foam packaging. Rail � 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 p
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INSTALLATION STEP 5 Hang the Opener To avoid possible SERIOUS INJURY from a falling garage door opener, fasten it SECURELY to structural supports of the Three representative installations are shown. Yours may garage. Concrete anchors MUST be used if installing ANY be different. Hanging brackets should be angled brackets into masonry. (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
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LOCK LOCK LOCK LOCK LIGHT LIGHT INSTALLATION STEP 6 Install the Door Control To prevent possible SERIOUS INJURY or DEATH from electrocution: Locate door control within sight of door, at a minimum • Be sure power is not connected BEFORE installing door height of 5' (1.5 m) where small children cannot reach, control. away from moving parts of door and door hardware. If • Connect ONLY to 24 VOLT low voltage wires. installing into drywall, drill 5/32" holes and use the anchors provided. For
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INSTALLATION STEP 7 Battery Cover Battery Install the Standby Power (Optional) � Make sure motor unit is unplugged. � Using a Phillips head screwdriver, remove the battery cover on the motor unit. � Partially insert battery into motor unit with terminals facing out. � Connect red (+) and black (-) wires from motor unit to corresponding terminals on battery. � Replace battery cover. INSTALLATION STEP 8 Install the Lights To prevent possible OVERHEATING of the endpanel or light socket: �
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NOTICE INSTALLATION STEP 9 Attach the Emergency Release Rope To prevent possible SERIOUS INJURY or DEATH from a falling and Handle garage door: • If possible, use emergency release handle to disengage � Thread one end of the rope through the hole in the top trolley ONLY when garage door is CLOSED. Weak or broken of the red handle so “NOTICE” reads right side up as springs or unbalanced door could result in an open door shown. Secure with an overhand knot at least falling rapidly and/or
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INSTALLATION STEP 11 ® Install The Protector System Be sure power is not connected to the garage door opener (Safety Reversing Sensors) BEFORE installing the safety reversing sensor. To prevent SERIOUS INJURY or DEATH from a closing garage The safety reversing sensor must be connected and door: aligned correctly before the garage door opener will • Correctly connect and align the safety reversing sensor. This move in the down direction. required safety device MUST NOT be disabled. IMPORTAN
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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" Door Track (15 cm) above the floor. They may be installed in one of three ways, as follows. Lip Indicator Garage door track installation (preferred): Light � Slip the curved arms over the rounded edge of each door track, with the curved arms facing the door. Sna
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MOUNTING AND WIRING THE SAFETY Figure 5 REVERSING SENSORS Wing Nut 1/4"-20 � 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 Carriage Bolt extension (Figure 5). 1/4"-20x1/2" Lens � Finger tighten the wing nuts. � Run the wires from both sensors to the opener. Use TROUBLESHOOTING THE SAFETY REVERSING insulated staples
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INSTALLATION STEP 12 Fasten the Door Bracket Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of door bracket. Follow instructions which apply to your door type as Contact your door manufacturer for reinforcement kit. 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 Header the height of the top p
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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 HARDWARE SHOWN and right, or the top and bottom holes. ACTUAL SIZE � Metal Doors: Drill 3/16" pilot holes and fasten the bracket with the 1/4"-14x5/8" self-threading screws provided. � Wood Doors: Drill 5/16" holes and use 5/16"x
