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The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
®
GARAGE DOOR OPENER
Model 3275C
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 model number label is
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TABLE OF CONTENTS Introduction 2-5Adjustment 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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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 • Complete the following test to make sure your garage door is door may not reverse when required. balanced and is not sticking or binding: • NEVER try to loosen, move or adjust garage door, door 1. Lift the door a
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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 You may find it helpful to refer back to this page and the Identify the type and height of your garage door. Survey your accompanying illustrations as you proceed with the installation of garage area to see if any of the conditions below apply to your your opener. installation. Additional materials may be required. SECTIONAL DOOR
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Carton Inventory Your garage door opener is packaged in two cartons which If anything is missing, carefully check the packing material. Parts contain the motor unit and all parts illustrated below. Accessories may be stuck in the foam. Hardware for installation is also listed will depend on the model purchased. below. Chain Spreader Remote Control Transmitter Visor Clip ® Multi-Function SECURITY✚ Door Control Panel 3-Button Remote Control Chain Styrofoam 2 Conductor Bell Wire White & White/R
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ASSEMBLY STEP 1 Attach the to the Motor Unit To avoid SERIOUS damage to garage door opener, use ONLY To avoid installation difficulties, do not run the garage door those bolts/fasteners mounted in the top of the opener. opener until instructed to do so. • Remove the bolt and lock nut from the top of the motor unit. • Place rail onto the bolt mounted on the motor unit and align Washered Bolt 5/16"-18x1/2" the back hole with the hole in the top of the unit. Lock Nut • Fasten rail with the w
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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 • To tighten the chain, turn outer nut in the direction shown Inner Nut (Figure 1). • When the chain is approximately 1/2" (13 mm) above the base of the rail at its midpoint, re-tighten the inner nut to secure the Trolley adjustment. Figure 2 Sprocket noise can result if chain is too loose. C
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Unfinished INSTALLATION STEP 1 Ceiling OPTIONAL Determine the Header Bracket Location CEILING MOUNT FOR HEADER BRACKET 2x4 Header Wall To prevent possible SERIOUS INJURY OR DEATH: Vertical Centerline • Header bracket MUST be RIGIDLY fastened to structural of Garage Door support on header wall or ceiling, otherwise garage door 2x4 Structural might not reverse when required. DO NOT install header Supports bracket over drywall. • Concrete anchors MUST be used if mounting header bracket or 2x4
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INSTALLATION STEP 2 Install the Header Bracket You can attach the header bracket either to the wall above the Wall Mounting Holes garage door, or to the ceiling. Follow the instructions which will work best for your particular requirements. Do not install the CEILING MOUNT ONLY The nail hole is for header bracket over drywall. If installing into masonry, use positioning only. You must use lag screws concrete anchors (not provided). UP to mount the header bracket. WALL HEADER BRACKET INSTALLAT
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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 opener securely on a temporary support to allow the rail to clear the spring. Header Wall • Position the rail bracket against the header bracket. Header Bracket • Align the bracket holes and join with a clevis pin as shown. • Insert a ring fast
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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. • Remove foam packaging. • Raise the opener onto a stepladder. You will need help at this Rail point if the ladder is not tall enough. • Open the door all the way and pla
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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. Concrete anchors MUST be used if installing ANY rigid support. On finished ceilings (Figure 2 and Figure 3), attach brackets into masonry. a sturdy metal bracket to structural supports before installing the
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LIGHT LIGHT LIGHT INSTALLATION STEP 6 Install the Door Control 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, and away from • Be sure power is not connected BEFORE installing door moving parts of door and door hardware. The installation surface control. must be smooth and flat. If installing into drywall (Figure 1), drill 5/32" holes and use anchors provided.
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NOTICE INSTALLATION STEP 7 Install the Light To prevent possible OVERHEATING of the endpanel or light • Press the release tabs on both sides of lens. Gently rotate lens socket: back and downward until the lens hinge is in the fully open • DO NOT use short neck or specialty light bulbs. position. Do not remove the lens. • DO NOT use halogen bulbs. Use ONLY incandescent. • Install up to a 100 watt maximum light bulb in each socket. The light will turn ON and remain lit for approximately 4
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INSTALLATION STEP 9 Electrical Requirements To prevent possible SERIOUS INJURY OR DEATH from To avoid installation difficulties, do not run the opener at this electrocution or fire: time. • Be sure power is not connected to the opener, and To reduce the risk of electric shock, your garage door opener has disconnect power to circuit BEFORE removing cover to a grounding type plug with a third grounding pin. This plug will establish permanent wiring connection. only fit into a grounding type
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INSTALLATION STEP 10 ® 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 direction. garage door: IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING • Correctly connect and align the safety reversing sensor. SENSOR This required safety devic
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INSTALLING THE BRACKETS Be sure power to the opener is disconnected. Install and align Figure 1 Figure 1 DOOR TRACK MOUNT (RIGHT SIDE) 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 They may be installed in one of three ways, as follows. Track Garage door track installation (preferred) (Figure 1): Lip • Slip the curved arms over the rounded edge of each door track, Indicator Light with the curved arms
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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). Carriage Bolt • Finger tighten the wing nuts. 1/4"-20x1/2" Lens � Run the wires from both sensors to the opener. Use insulated staples to secure wire to wall and ceiling. TR
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INSTALLATION STEP 11 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. A vertical reinforcement brace should cover the height of the top panel. Fi
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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 HARDWARE SHOWN the 1/4"-14x5/8" self-threading screws provided. ACTUAL SIZE • Wood Doors: Drill 5/16" holes and use 5/16"x2
