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The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
®
GARAGE DOOR OPENER
Models 3245 1/3 HP
3255 1/2 HP
3255-2 1/2 HP
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.
■ The
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TABLE OF CONTENTS Introduction 2-5 Adjustment 23-25 Safety symbol and signal word review........................2 Adjust the travel limits ...............................................23 Preparing your garage door ........................................3 Adjust the force .........................................................24 Tools needed...............................................................3 Test the safety reversal system.................................25 ® Planning ..........
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1 Preparing your garage door WARNING WARNING Before you begin: To prevent possible SERIOUS INJURY OR DEATH: • Disable locks. • ALWAYS call a trained door systems technician if CAUTION WARNING • Remove any ropes connected to garage door. garage door binds, sticks, or is out of balance. An unbalanced garage door may not reverse when • Complete the following test to make sure your required. garage door is balanced and is not sticking or binding: • NEVER try to loosen, move or adjust garage door, d
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— — — — — — — — Slack in chain tension is normal when garage door is closed. Slack in chain tension is normal when garage door is closed. Planning materials may be required. You may find it helpful to Identify the type and height of your garage door. Survey your garage area to see if any of the refer back to this page and the accompanying illustrations as you proceed with the installation of conditions below apply to your installation. Additional your opener. FINISHED CEILING S
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Carton Inventory Your garage door opener is packaged in two cartons purchased. If anything is missing, carefully check the which contain the motor unit and all parts illustrated packing material. Parts may be stuck in the foam. below. Accessories will depend on the model Hardware for installation is also listed below. 3245 (1), 3255 (1), 3255-2 (2) Sprocket Cover Remote Control ® Visor Clip SECURITY✚ Multi-Function Single-Button Remote Control Door Control Panel Chain Styrofoam Motor Unit with
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WARNING WARNING ASSEMBLY STEP 1 CAUTION WARNING Attach the Rail to the Motor Unit To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of To avoid installation difficulties, do not run the the opener. garage door opener until instructed to do so. • Remove the two washered bolts mounted in top of motor unit. • Position rail at a 45˚ angle to opener so one hole USE ONLY THIS TYPE AND SIZE in rail and motor unit line up. BOLT Washered Bolt • Thread one
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Figure 1 ASSEMBLY STEP 3 Lock Washer Tighten the Chain Outer Nut Inner Nut To Tighten Outer Nut • Spin the inner nut and lock washer down the trolley threaded shaft, away from the trolley. To Tighten Inner Nut • To tighten the chain, turn outer nut in the direction shown (Figure 1). • When the chain is approximately 1/2" (13 mm) Trolley above the base of the rail at its midpoint, re-tighten Figure 2 the inner nut to secure the adjustment. Sprocket noise can result if chain is too loose. Chain Wh
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INSTALLATION STEP 1 Unfinished OPTIONAL Ceiling Determine the Header Bracket CEILING MOUNT Location FOR HEADER BRACKET WARNING Header Wal l WARNING 2x4 V ertical Centerlin e To prevent possible SERIOUS INJURY or DEATH: of Garage Door • Header bracket MUST be RIGIDLY fastened to 2x4 CAUTION WARNING Structural structural support on header wall or ceiling, otherwise Supports garage door might not reverse when required. DO NOT install header bracket over drywall. • Concrete anchors M
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INSTALLATION STEP 2 Install the Header Bracket Wall Mounting Holes You can attach the header bracket either to the wall CEILING MOUNT ONLY above the garage door, or to the ceiling. Follow the The nail hole is for positioning only. instructions which will work best for your particular You must use lag screws UP requirements. Do not install the header bracket to mount the header bracket. over drywall. If installing into masonry, use concrete anchors (not provided). WALL HEADER BRACKET INSTALLATI
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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 base. NOTE: If the door spring is in the way you’ll need help. Have someone hold the Header Wall opener securely on a temporary support to allow Header Bracket the rail to clear the spring. • Position the rail bracket against the header Chain Pulley Bracket bracket. • Align the bracket holes and join with a clevis pin as shown. • I
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WARNING WARNING INSTALLATION STEP 4 CAUTION WARNING 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 Rail 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. 2x4 is
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INSTALLATION STEP 5 WARNING WARNING Hang the Opener To avoid possible SERIOUS INJURY from a falling garage door opener, fasten it SECURELY to structural Three representative installations are shown. Yours CAUTION WARNING supports of the garage. Concrete anchors MUST be used may be different. Hanging brackets should be angled if installing any brackets into masonry. (Figure 1) to provide rigid support. On finished ceilings (Figure 2 and Figure 3), attach a sturdy metal bracket to structural suppo
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LIGHT LIGHT LIGHT WARNING WARNING INSTALLATION STEP 6 CAUTION WARNING Install the Door Control To prevent possible SERIOUS INJURY or DEATH from electrocution: Locate door control within sight of the door at a • Be sure power is NOT connected BEFORE installing minimum height of 5 feet (1.5 m) where small children door control. cannot reach, and away from moving parts of the door • Connect ONLY to 24 VOLT low voltage wires. and door hardware. The installation surface must be To prevent possible S
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NOTICE WARNING WARNING INSTALLATION STEP 7 CAUTION WARNING Install the Light To prevent possible OVERHEATING of the endpanel or light socket, • Press the release tabs on both sides of lens. • DO NOT use short neck or specialty light bulbs. Gently rotate lens back and downward until the • DO NOT use halogen bulbs. Use ONLY incandescent. lens hinge is in the fully open position. Do not remove the lens. • Install up to a 100 watt maximum light bulb in each 100 Watt (Max) socket. The light will tu
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INST WALLA ARNING TION STEP 9 WARNING Electrical Requirements To prevent possible SERIOUS INJURY or DEATH from electrocution or fire: To avoid installation difficulties, do not run the CAUTION WARNING • Be sure power is not connected to the opener, and opener at this time. disconnect power to circuit BEFORE removing cover to To reduce the risk of electric shock, your garage door establish permanent wiring connection. opener has a grounding type plug with a third • Garage door installation and wi
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INSTALLATION STEP 10 WARNING WARNING ® Install The Protector System Be sure power is not connected to the garage door opener BEFORE installing the safety reversing sensor. The safety reversing sensor must be connected CAUTION WARNING To prevent SERIOUS INJURY or DEATH from a closing and aligned correctly before the garage door garage door: opener will move in the down direction. • Correctly connect and align the safety reversing sensor. This required safety device MUST NOT be IMPORTANT INFORMATI
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INSTALLING THE BRACKETS Be sure power to the opener is disconnected. DOOR TRACK MOUNT (RIGHT SIDE) Figure 1 Install and align the brackets so the sensors will face each other across the garage door, with the beam no Door higher than 6" (15 cm) above the floor. They may be Track installed in one of three ways, as follows. Lip Garage door track installation (preferred): Indicator Light • Slip the curved arms over the rounded edge of each door track, with the curved arms facing the door. Snap into
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MOUNTING AND WIRING THE SAFETY Figure 5 REVERSING SENSORS Wing Nut • Slide a 1/4"-20x1/2" carriage bolt head into the slot 1/4"-20 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 Carriage Bolt by a bracket extension (Figure 5). 1/4"-20x1/2" Lens • Finger tighten the wing nuts. • Run the wires from both sensors to the opener. TROUBLESHOOTING THE SAFETY REVERSING Use insulated staples to
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WARNING WARNING INSTALLATION STEP 11 CAUTION WARNING Fasten the Door Bracket Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of Follow instructions which apply to your door type as door bracket. Contact your door manufacturer for illustrated below or on the following page. reinforcement kit. A horizontal reinforcement brace should be long enough to be secured to two or three vertical supports. A vertical reinforcement brace should Header cov
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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 and right, or the top and bottom holes. • Metal Doors: Drill 3/16" pilot holes and fasten the bracket with the 1/4"-14x5/8" self-threading screws HARDWARE SHOWN provided. ACTUAL SIZE • Wood Doors: Drill 5/16" holes and use 5/16"x2" carriag
