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®
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.chamberlain.com
®
GARAGE DOOR OPENER
Model 248739
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 locate
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TABLE OF CONTENTS Introduction 2-7 Adjustment 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.................................29 ® 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 garage CAUTION WARNING • 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 following test to make sure your garage door is balanced and is not sticking or binding: • NEVER try to loosen, move or adjust garage door, d
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— — — — — — — — Planning Identify the type and height of your garage door. Survey • Do you have an access door in addition to the garage your garage area to see if any of the conditions below door? If not, Model 7702CB Emergency Key Release is apply to your installation. Additional materials may be required. See Accessories page. required. You may find it helpful to refer back to this page • Look at the garage door where it meets the floor. Any and the accompanying illustrations a
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Planning (Continued) WARNING WARNING ONE-PIECE DOOR INSTALLATIONS Without a properly working safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or • Generally, a one-piece door does not require CAUTION WARNING KILLED by a closing garage door. reinforcement. If your door is lightweight, refer to the • The gap between the bottom of the garage door and the floor information relating to sectional doors in Installation MUST NOT exceed 1/4" (6 mm). Otherwise, the
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CLOSED OPEN Carton Inventory Your garage door opener is packaged in one carton which Parts may be stuck in the foam. Hardware for assembly contains the motor unit and all parts illustrated below. and installation is shown on the next page. Save the Accessories will depend on the model purchased. If carton and packing material until installation and anything is missing, carefully check the packing material. adjustment is complete. ® SECURITY✚ 3-Button Remote Control (2) Idler Pulley Garage Door M
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Hardware Inventory Separate all hardware and group as shown below for the assembly and installation procedures. ASSEMBLY HARDWARE Lock Nut Lock Washer Nut Spring/Trolley Nut (1) 1/4"-20 (2) 3/8" (1) 3/8" (1) Bolt 1/4"-20x1-3/4" (2) Master Link (2) Idler Bolt (1) Trolley Threaded Shaft (1) INSTALLATION HARDWARE Carriage Bolt Wing Nut Ring Nut 5/16"-18 (8) Handle 1/4"-20x1/2" (2) 1/4"-20 (2) Fastener (3) Lag Screw Hex Bolt Insulated 5/16"-9x1-5/8" (2) 5/16"-18x7/8" (4) Lock Washer 5/16" (7) Sta
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WARNING WARNING ASSEMBLY STEP 1 CAUTION WARNING Assemble the Rail & Install the Trolley To prevent INJURY from pinching, keep hands and fingers away from the joints while assembling the rail. To avoid installation difficulties, do not run the garage door opener until instructed to do so. The front rail has a cut out “window” at the door end (see 3. Place the motor unit on packing material to protect the illustration). The hole above this window is larger on cover, and rest the back end of the ra
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WARNING WARNING ASSEMBLY STEP 2 CAUTION WARNING Fasten 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. • Insert a 1/4"-20x1-3/4 bolt into the cover protection bolt hole on the back end of the rail as shown. Tighten securely with a 1/4"-20 lock nut. Do NOT overtighten. • Remove the two bolts from the top of the motor unit. Motor Unit • Place the “U” bracket, flat side down, on the motor unit Bolts Sprocket
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ASSEMBLY STEP 4 WARNING WARNING Install the Belt and Attach the Belt Cap To avoid possible SERIOUS INJURY to fingers from moving Retainer garage door opener: CAUTION WARNING • ALWAYS keep hand clear of sprocket while operating opener. 1. Pull the belt around the idler pulley and toward the • Securely attach sprocket cover BEFORE operating. trolley. The ribbed side must contact the pulley. 2. Hook the trolley connector into the retaining slot on the trolley as shown. 3. With the trolley against t
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ASSEMBLY STEP 5 Set the Tension • Insert a screwdriver tip into one of the nut ring slots and brace it firmly against the trolley. • Place a 7/16" open end wrench on the square end. Nut Ring Slot Rotate the nut about 1/4 turn until the spring releases Square End and snaps the nut ring against the trolley. This sets the spring to optimum belt tension. You have now finished assembling your garage door Trolley opener. Please read the following warnings before Square End Nut Ring proceeding to the i
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Unfinished INSTALLATION STEP 1 Ceiling OPTIONAL CEILING Determine the Header Bracket MOUNT Location FOR HEADER BRACKET Header Wall 2x4 WARNING WARNING Vertical Centerline of Garage Door To prevent possible SERIOUS INJURY or DEATH: 2x4 • Header bracket MUST be RIGIDLY fastened to structural Structural CAUTION WARNING 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 moun
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Wall Mount INSTALLATION STEP 2 Install the Header Bracket You can attach the header bracket either to the wall above UP 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 hor
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INSTALLATION STEP 3 Attach the Rail to the Header Bracket NOTE: (Optional) With some existing installations, you may re-use the old header bracket with the two plastic spacers included in the hardware bag. Place the spacers inside the bracket on each side of the rail, as illustrated. • 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 temp
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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 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
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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 supports of the Three representative installations are shown. Yours may CAUTION WARNING 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 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 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 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. installi
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NOTICE WARNING WARNING INSTALLATION STEP 7 CAUTION WARNING Install the Lights 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
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INSTALLATION STEP 9 WARNING WARNING Electrical Requirements To prevent possible SERIOUS INJURY or DEATH from electrocution or fire: To avoid installation difficulties, do not run the opener CAUTION WARNING • 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 installatio
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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 and CAUTION WARNING 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 required safety device MUST NOT be disabled. IMPORTAN
