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The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.chamberlain.com
®
GARAGE DOOR OPENER
Model 248735S 3/4 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 model number label is
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TABLE OF CONTENTS Introduction 2-7Adjustment 27-29 Safety symbol and signal word review . . . . . . . . . . . . . . .2 Adjust the travel limits . . . . . . . . . . . . . . . . . . . . . . . . . .27 Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . .3 Adjust the force. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 Tools needed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Test the safety reversal system. . . . . . . . . . . . . . .
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Preparing your garage door Before you begin: • Disable locks. To prevent possible SERIOUS INJURY or DEATH: • Remove any ropes connected to garage door. • ALWAYS call a trained door systems technician if garage door binds, sticks, or is out of balance. An • Complete the following test to make sure your garage unbalanced garage door may NOT reverse when door is balanced and is not sticking or binding: required. 1. Lift the door about halfway as shown. Release the • NEVER try to loosen, move
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Planning Identify the type and height of your garage door. Survey • Look at the garage door where it meets the fl oor. Any your garage area to see if any of the conditions below gap between the fl oor and the bottom of the door must apply to your installation. Additional materials may be not exceed 1/4" (6 mm). Otherwise, the safety reversal required. You may fi nd it helpful to refer back to this page system may not work properly. See Adjustment Step 3. and the accompanying illustrations as yo
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Planning (Continued) ONE-PIECE DOOR INSTALLATIONS Without a properly working safety reversal system, • Generally, a one-piece door does not require persons (particularly small children) could be reinforcement. If your door is lightweight, refer to the SERIOUSLY INJURED or KILLED by a closing garage information relating to sectional doors in Installation door. Step 11. • The gap between the bottom of the garage door • Depending on your door’s construction, you may need and the fl oor MUST
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Carton Inventory Your garage door opener is packaged in one carton which PARTS MAY BE STUCK IN THE FOAM. Hardware for contains the motor unit and all parts illustrated below. assembly and installation is shown on the next page. Accessories will depend on the model purchased. If Save the carton and packing material until installation and anything is missing, carefully check the packing material. adjustment is complete. Idler Pulley ® SECURITY ✚ 3-Button Remote Control with Visor Clip (2) Mult
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ASSEMBLY STEP 1 Assemble the Rail & Install the Trolley To prevent INJURY from pinching, keep hands and To avoid installation diffi culties, do not run the garage fi ngers away from the joints while assembling the rail. door opener until instructed to do so. The front rail has a cut out “window” at the door end 3. Place the motor unit on packing material to protect (see illustration). The hole above this window is larger the cover, and rest the back end of the rail on top. on the top of the r
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ASSEMBLY STEP 2 Fasten the Rail to the Motor Unit • Insert a 1/4"-20x2" bolt, washer and spacer into the To avoid SERIOUS damage to garage door opener, cover protection bolt hole on the back end of the rail use ONLY those bolts/fasteners mounted in the top of as shown. Tighten securely with a 1/4"-20 lock nut. the opener. DO NOT overtighten. • Remove the bolt and lock nut from the top of the Hex Screws motor unit. 8-32x7/16" Chain Spreader • Attach spreader to the motor unit with two scre
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INSTALLATION STEP 1 OPTIONAL Unfi nished CEILING Ceiling Determine the Header Bracket Location MOUNT FOR HEADER BRACKET Header Wall 2x4 To prevent possible SERIOUS INJURY or DEATH: Vertical Centerline • Header bracket MUST be RIGIDLY fastened to of Garage Door 2x4 Structural structural support on header wall or ceiling, Supports otherwise garage door might NOT reverse when required. DO NOT install header bracket over drywall. • Concrete anchors MUST be used if mounting header bracket
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Wall Mount INSTALLATION STEP 2 Install the Header Bracket You can attach the header bracket either to the wall above the garage door, or to the ceiling. Follow the instructions which will work best for your particular requirements. Do not install the header bracket over drywall. If installing into masonry, use concrete anchors (not provided). Optional WALL HEADER BRACKET INSTALLATION Mounting Holes • Center the bracket on the vertical centerline with the bottom edge of the bracket on the h
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Header Wall Header Bracket INSTALLATION STEP 3 Idler Pulley Header Attach the Rail to the Header Bracket Bracket NOTE: (Optional) With some existing installations, you may re-use the old header bracket with the two plastic spacers Mounting included in the hardware bag. Place the spacers inside the Hole bracket on each side of the rail, as illustrated. Existing • Position the opener on the garage fl oor below the Header header bracket. Use packing material as a protective Bracket Existing
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INSTALLATION STEP 5 Hang the Opener To avoid possible SERIOUS INJURY from a falling Three representative installations are shown. Yours may garage door opener, fasten it SECURELY to structural be different. Hanging brackets should be angled (Figure 1) supports of the garage. Concrete anchors MUST be to provide rigid support. On fi nished ceilings (Figure 2 used if installing ANY brackets into masonry. and Figure 3), attach a sturdy metal bracket to structural supports before installing the
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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 electrocution: height of 5 feet (1.5 m) where small children cannot reach, • Be sure power is NOT connected BEFORE installing and away from moving parts of door and door hardware. door control. The installation surface must be smooth and fl at. If • Connect ONLY to 24 VOLT low voltage wires. installing into drywall (Figure 1), drill 5/32" holes
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INSTALLATION STEP 7 Install the Lights To prevent possible OVERHEATING of the endpanel or • Press the release tabs on both sides of lens. Gently light socket: rotate lens back and downward until the lens hinge is in • DO NOT use short neck or specialty light bulbs. the fully open position. Do not remove the lens. • DO NOT use halogen bulbs. Use ONLY • Install a 100 watt maximum light bulb in each socket. incandescent. Light bulb size should be A19, standard neck only. To prevent damage to
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INSTALLATION STEP 9 Electrical Requirements To prevent possible SERIOUS INJURY or DEATH from To avoid installation diffi culties, do not run the opener electrocution or fi re: at this time. • Be sure power is NOT connected to the opener, To reduce the risk of electric shock, your garage door and disconnect power to circuit BEFORE removing opener has a grounding type plug with a third grounding cover to establish permanent wiring connection. pin. This plug will only fi t 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 BEFORE installing the safety reversing sensor. The safety reversing sensor must be connected and aligned correctly before the garage door opener will To prevent SERIOUS INJURY or DEATH from a move in the down direction. closing garage door: • Correctly connect and align the safety reversing IMPORTANT INFORMATION ABOUT THE SAFETY sensor. This required safety device MUST NOT be REVERS
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Installing the Brackets DOOR TRACK MOUNT (RIGHT SIDE) Figure 1 Be sure power to the opener is disconnected. Install and align the brackets so the sensors will face each other Door Track across the garage door, with the beam no higher than 6" (15 cm) above the fl oor. They may be installed in one of Lip Indicator three ways, as follows. Light Garage door track installation (preferred) (Figure 1): • Slip the curved arms over the rounded edge of each Safety door track, with the curved arms faci
