Summary of the content on the page No. 1
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
®
GARAGE DOOR OPENER
Models 3245M 1/3 HP
3255M 1/2 HP
3255-2M 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 o
Summary of the content on the page No. 2
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Test the safety reversal system . . . . . . . . . . . . . .
Summary of the content on the page No. 3
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 may NOT reverse when required. door is balanced and is not sticking or binding: • NEVER try to loosen, move or adjust garage door, door springs, cables, pul
Summary of the content on the page No. 4
— — — — — — — — Slack in chain tension is normal when garage door is closed. Slack in chain tension is normal when garage door is closed. Planning Identify the type and height of your garage door. Survey required. You may find it helpful to refer back to this your garage area to see if any of the conditions below page and the accompanying illustrations as you proceed apply to your installation. Additional materials may be with the installation of your opener. FINISHED CEILING S
Summary of the content on the page No. 5
Carton Inventory Your garage door opener is packaged in two cartons If anything is missing, carefully check the packing which contain the motor unit and all parts illustrated material. Parts may be stuck in the foam. Hardware for below. Accessories will depend on the model purchased. installation is also listed below. Models 3245M, 3255M (1) Model 3255-2M (2) Sprocket Cover Remote Control ® SECURITY✚ Visor Clip Multi-Function Single-Button Remote Control Door Control Panel Chain Styrofoam 2 C
Summary of the content on the page No. 6
ASSEMBLY STEP 1 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 the opener. To avoid installation difficulties, do not run the 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 in rail USE ONLY THIS TYPE AND SIZE and motor unit line up. BOLT Washered Bolt • Thread one of the washered bolts pa
Summary of the content on the page No. 7
Figure 1 ASSEMBLY STEP 3 Lock Tighten the Chain Washer 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) above the base of the rail at its midpoint, re-tighten the inner Trolley nut to secure the adjustment. Figure 2 Sprocket noise can result if chain is too loose.
Summary of the content on the page No. 8
Unfinished INSTALLATION STEP 1 Ceiling OPTIONAL Determine the Header Bracket CEILING MOUNT Location FOR 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
Summary of the content on the page No. 9
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 instructions which will work best for your particular The nail hole is for positioning only. You must use lag screws to UP requirements. DO NOT install the header bracket over mount the header bracket. drywall. If installing into masonry, use concrete anchors (not provided). WALL HEADER BRACKET INSTALL
Summary of the content on the page No. 10
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. Chain Pulley Bracket
Summary of the content on the page No. 11
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. Rail • 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 p
Summary of the content on the page No. 12
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 (Figure 1) brackets into masonry. to provide rigid support. On finished ceilings (Figure 2 and Figure 3), attach a sturdy metal bracket to structural supports before installing the
Summary of the content on the page No. 13
LIGHT 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 height of 5 feet (1.5 m) where small children cannot reach, • Be sure power is NOT connected BEFORE installing door and away from moving parts of door and door hardware. control. The installation surface must be smooth and flat. If • Connect ONLY to 24 VOLT low voltage wires. installing into drywall (Figure 1),
Summary of the content on the page No. 14
NOTICE INSTALLATION STEP 7 Install the Light To prevent possible OVERHEATING of the endpanel or light socket: • Press the release tabs on both sides of lens. Gently • DO NOT use short neck or specialty light bulbs. rotate lens back and downward until the lens hinge is in • DO NOT use halogen bulbs. Use ONLY incandescent. the fully open position. Do not remove the lens. To prevent damage to the opener: • Install a 100 watt maximum light bulb in each socket. • DO NOT use bulbs larger than
Summary of the content on the page No. 15
INSTALLATION STEP 9 Electrical Requirements To prevent possible SERIOUS INJURY or DEATH from electrocution or fire: To avoid installation difficulties, do not run the opener • Be sure power is NOT connected to the opener, and 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 grounding • Garage door installation and wiring MUST be in
Summary of the content on the page No. 16
INSTALLATION STEP 10 ® 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 and To prevent SERIOUS INJURY or DEATH from a closing garage aligned correctly before the garage door opener will door: move in the down direction. • Correctly connect and align the safety reversing sensor. This IMPORTANT INFORMATION ABOUT required safety device MUST NOT be disabled. THE S
Summary of the content on the page No. 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" Door Track (15 cm) above the floor. They may be installed in one of Lip three ways, as follows. 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
Summary of the content on the page No. 18
MOUNTING AND WIRING THE SAFETY REVERSING Figure 5 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 Carriage Bolt bracket extension (Figure 5). 1/4"-20x1/2" Lens • Finger tighten the wing nuts. • Run the wires from both sensors to the opener. Use insulated staples to secure wire to wall and ceiling.
Summary of the content on the page No. 19
INSTALLATION STEP 11 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 the height of the top panel. H
Summary of the content on the page No. 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 and fasten the HARDWARE SHOWN bracket with the 1/4"-14x5/8" self-threading screws ACTUAL SIZE provided. • Wood Doors: Drill 5/16" holes and use 5/16"x
