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®
The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.chamberlain.com
®
GARAGE DOOR OPENER
Model 248754
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 28-30 Safety symbol and signal word review. . . . . . . . . . . . . . .2 Program the travel limits . . . . . . . . . . . . . . . . . . . . . . . . 28 Preparing your garage door . . . . . . . . . . . . . . . . . . . . . . .3 Setting the force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Tools needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Test the safety reversal system . . . . . . . . . . . . . . . .
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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 door may not reverse when required. � Complete the following test to make sure your • NEVER try to loosen, move or adjust garage door, door garage door is balanced and is not sticking or binding: springs, cables, pu
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— — — — — — — — Planning � Do you have an access door in addition to the garage Identify the type and height of your garage door. Survey your garage area to see if any of the conditions below door? If not, Model 7702CB Emergency Key Release is required. See Accessories page. apply to your installation. Additional materials may be required. You may find it helpful to refer back to this � Look at the garage door where it meets the floor. Any page and the accompanying illustr
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Planning (Continued) ONE-PIECE DOOR INSTALLATIONS Without a properly working safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED � Generally, a one-piece door does not require or 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 information relating to sectional doors in Installation floor MUST NOT exceed 1/4" (6 mm). Otherwise, the safety Step 12. reversa
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LOCK LIGHT Carton Inventory Your garage door opener is packaged in one carton material. Parts may be stuck in the foam. Hardware for which contains the motor unit and all parts illustrated assembly and installation is shown on the next page. below. Accessories will depend on the model purchased. Save the carton and packing material until installation If anything is missing, carefully check the packing and adjustment is complete. ® SECURITY✚ 3-Button Remote Control (2) Idler Pulley Battery M
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Hardware Inventory Separate all hardware and group as shown below for the assembly and installation procedures. ASSEMBLY HARDWARE Lock Washer Nut Lock Nut Spring/Trolley Nut (1) 3/8" (1) 3/8" (1) 1/4"-20 (2) Bolt 1/4"-20x1-3/4" (2) Master Link (2) Idler Bolt (1) Trolley Threaded Shaft (1) INSTALLATION HARDWARE Ring Handle Carriage Bolt Wing Nut Nut 5/16"-18 (8) Fastener (3) 1/4"-20x1/2" (2) 1/4"-20 (2) 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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ASSEMBLY STEP 1 Assemble the Rail and Install the To prevent INJURY from pinching, keep hands and fingers Trolley 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 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
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ASSEMBLY STEP 2 Fasten the Rail to the Motor Unit To avoid SERIOUS damage to garage door opener, use ONLY � Insert a 1/4"-20x1-3/4 bolt into the cover protection bolt those bolts/fasteners mounted in the top of the opener. 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. � Place the “U” bracket, flat side down, on the motor unit and align the bracket holes with the bolt holes. Fa
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ASSEMBLY STEP 4 Install the Belt and Attach the Belt To avoid possible SERIOUS INJURY to fingers from moving Cap Retainer garage door opener: 1. Pull the belt around the idler pulley and toward the • ALWAYS keep hand clear of belt pulley while trolley. The ribbed side must contact the pulley. operating opener. • Securely attach belt pulley cover BEFORE operating. 2. Hook the trolley connector into the retaining slot on the trolley as shown. 3. With the trolley against the screwdriver, di
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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. Rotate the nut about 1/4 turn until the spring releases and snaps the nut ring against the trolley. This sets the spring to optimum belt tension. Nut Ring Slot Square End You have now finished assembling your garage door opener. Please read the following warnings before proceeding to the installation section.
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INSTALLATION STEP 1 Unfinished Ceiling OPTIONAL Determine the Header Bracket CEILING Location MOUNT FOR HEADER BRACKET Header Wall 2x4 Vertical Centerline To prevent possible SERIOUS INJURY or DEATH: of Garage Door • Header bracket MUST be RIGIDLY fastened to structural 2x4 Structural support on header wall or ceiling, otherwise garage door Supports might not reverse when required. DO NOT install header bracket over drywall. • Concrete anchors MUST be used if mounting header bracket or 2x
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INSTALLATION STEP 2 Wall Mount Install the Header Bracket You can attach the header bracket either to the wall UP 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
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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 will need help. Have someone hold the opener securely
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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 rail on 2x4 placed on top section of door. 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
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INSTALLATION STEP 5 Hang the Opener To avoid possible SERIOUS INJURY from a falling garage Three representative installations are shown. Yours may door opener, fasten it SECURELY to structural supports of the garage. Concrete anchors MUST be used if installing ANY be different. Hanging brackets should be angled brackets into masonry. (Figure 1) to provide rigid support. On finished ceilings (Figures 2 and 3), attach a sturdy metal bracket to structural supports before installing the opener
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LOCK LIGHT LOCK 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 • Disconnect ALL electric and battery power BEFORE reach, away from moving parts of door and door performing ANY service or maintenance. hardware. If installing into drywall, drill 5/32" holes and • Connect ONLY to 24 VOLT low voltage wires. use the anch
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INSTALLATION STEP 7 Install the Battery Backup ALWAYS wear protective gloves and eye protection when changing the battery or working around the battery � Make sure motor unit is unplugged. compartment. � Using a Phillips head screwdriver, remove the battery cover on the motor unit. � Partially insert battery into motor unit with terminals facing out. � Connect the red (+) and black (-) wires from motor Battery Cover Battery unit to corresponding terminals on battery. � Replace battery
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NOTICE INSTALLATION STEP 9 Attach the Emergency Release Rope To prevent possible SERIOUS INJURY or DEATH from a and Handle falling garage door: � Thread one end of the rope through the hole in the top • If possible, use emergency release handle to disengage trolley ONLY when garage door is CLOSED. Weak or of the red handle so “NOTICE” reads right side up as broken springs or unbalanced door could result in an open shown. Secure with an overhand knot at least door falling rapidly and/or
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INSTALLATION STEP 10 Electrical Requirements To prevent possible SERIOUS INJURY or DEATH from electrocution or fire: To avoid installation difficulties, do not run the opener at this time. • Disconnect ALL electric and battery power BEFORE performing ANY service or maintenance. To reduce the risk of electric shock, your garage door • Garage door installation and wiring MUST be in compliance opener has a grounding type plug with a third grounding with ALL local electrical and building code
