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The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.chamberlain.com
®
GARAGE DOOR OPENER
Model 248735 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 l
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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 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 garage door is balanced and is not sticking or binding: • NEVER try to loosen, move or adjust garage door, door springs, cables, pulleys, br
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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 as you proceed with gap between
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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 or • Generally, a one-piece door does not require 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 11. reversal system
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Carton Inventory Your garage door opener is packaged in one carton which assembly and installation is shown on the next page. Save contains the motor unit and all parts illustrated below. the carton and packing material until installation and Accessories will depend on the model purchased. If adjustment is complete. anything is missing, carefully check the packing material. PARTS MAY BE STUCK IN THE FOAM. Hardware for ® SECURITY✚ 3-Button ® Remote Control with Visor Clip (2) SECURITY✚ Multi-Func
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Hardware Inventory Separate all hardware and group as shown below for the assembly and installation procedures. ASSEMBLY HARDWARE Bolt 1/4"-20x1-3/4 (1) Lock Washer Nut 3/8" (1) 3/8" (1) Bolt 1/4"-20x2-1/2 (1) Lock Nut 1/4"-20 (2) Master Idler Bolt (1) Link (2) Trolley Threaded Shaft (1) INSTALLATION HARDWARE Spacer (2) Carriage Bolt Wing Nut Ring Nut 5/16"-18 (8) Handle 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 5/1
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ASSEMBLY STEP 1 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 rail on top. For the top of the ra
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ASSEMBLY STEP 2 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"-20x2-1/2 bolt, washer and spacer into the cover protection bolt hole on the back end of the rail as shown. Install lower spacer and washer then tighten securely with a 1/4"-20 lock nut. Do NOT overtighten. Hex Screws 8-32x7/16 • Remove the bolt and lock nut from the top of the motor unit. • Attach spreader to the motor
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ASSEMBLY STEP 4 Install the Chain/Cable To avoid possible SERIOUS INJURY to fingers from moving garage door opener: 1. Pull the cable around the idler pulley and toward the • ALWAYS keep hand clear of sprocket while operating opener. trolley. • Securely attach chain spreader BEFORE operating. 2. Connect the cable to the retaining slot on the trolley, as shown (Figure 1): • From below, push pins of master link bar up through Dispensing Carton cable link and trolley slot. Leave Chain and Cable • P
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ASSEMBLY STEP 5 Figure 1 Trolley Outer Lock Threaded Tighten the Chain Nut Washer Shaft To Tighten Outer Nut • Spin the inner nut and lock washer down the trolley threaded shaft, away from the trolley. Inner Nut • To tighten the chain, turn outer nut in the direction shown (Figure 1). To Tighten Inner Nut • When the chain is approximately 1/4" (6 mm) above the base of the rail at its midpoint, re-tighten the inner nut to Figure 2 secure the adjustment. Sprocket noise can result if chain is too
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INSTALLATION STEP 1 Unfinished Ceiling Determine the Header Bracket OPTIONAL CEILING Location MOUNT FOR HEADER BRACKET Header Wall 2x4 To prevent possible SERIOUS INJURY or DEATH: Vertical Centerline of Garage Door • Header bracket MUST be RIGIDLY fastened to structural 2x4 support on header wall or ceiling, otherwise garage door Structural Supports might not reverse when required. DO NOT install header bracket over drywall. • Concrete anchors MUST be used if mounting header bracket or 2x4 into
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Wall Mount INSTALLATION STEP 2 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 Mounting Holes WALL HEADER BRACKET INSTALLATION • Center the bracket on the vertical centerline with the Vertical bottom edge of the bracket o
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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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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 place a
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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 opener
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1 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 • Be sure power is not connected BEFORE installing door height of 5 feet (1.5 m) where small children cannot control. reach, and away from moving parts of door and door • Connect ONLY to 24 VOLT low voltage wires. hardware. The installation surface must be smooth and flat. If installing into drywall (Figure 1), drill 5/3
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NOTICE INSTALLATION STEP 7 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 NOT use bulbs larger than 100W.
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INSTALLATION STEP 9 Electrical Requirements To prevent possible SERIOUS INJURY or DEATH from electrocution or fire: To avoid installation difficulties, do not run the • Be sure power is not connected to the opener, and opener 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 complian
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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 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. IMPORTANT INFORMATION ABOUT THE SAFETY R
