The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.chamberlain.com ® GARAGE DOOR OPENER Model • 7520D 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 operation.
TABLE OF CONTENTS Introduction 2-7 Adjustment Safety symbol and signal word review........................2 Preparing your garage door ........................................3 Tools needed ...............................................................3 Planning ..................................................................4-5 Carton inventory ..........................................................6 Hardware inventory .....................................................
Preparing your garage door WARNING Before you begin: • Disable locks. • Remove any ropes connected to garage door. • Complete the following test to make sure your garage door is balanced and is not sticking or binding: 1. Lift the door about halfway as shown. Release the door. If balanced, it should stay in place, supported entirely by its springs. 2. Raise and lower the door to see if there is any binding or sticking.
Planning Identify the type and height of your garage door. Survey your garage area to see if any of the conditions below apply to your installation. Additional materials may be required. You may find it helpful to refer back to this page and the accompanying illustrations as you proceed with the installation of your opener. Depending on your requirements, there are several installation steps which may call for materials or hardware not included in the carton.
Planning (Continued) WARNING ONE-PIECE DOOR INSTALLATIONS • Generally, a one-piece door does not require reinforcement. If your door is lightweight, refer to the information relating to sectional doors in Installation Step 11. • Depending on your door’s construction, you may need additional mounting hardware for the door bracket (Step 11). Without a properly working safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door.
Carton Inventory FOAM. Hardware for assembly and installation is shown on the next page. Save the carton and packing material until installation and adjustment is complete. Your garage door opener is packaged in one carton which contains the motor unit and all parts illustrated below. Accessories will depend on the model purchased. If anything is missing, carefully check the packing material.
Hardware Inventory Separate all hardware and group as shown below for the assembly and installation procedures.
WARNING CAUTION 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. 3. Place the motor unit on packing material to protect the cover, and rest the back end of the rail on top. For convenience, put a support under the front end of the rail. 4.
WARNING ASSEMBLY STEP 2 CAUTION Fasten the Rail to the Motor Unit • 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. • Place the “U” bracket, flat side down onto the motor unit and align the bracket hole with the bolt holes. Fasten with the previously removed bolts. • Align the rail assembly with the top of the motor unit.
WARNING ASSEMBLY STEP 4 Install the Chain/Cable 1. Pull the cable around the idler pulley and toward the trolley. 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 cable link and trolley slot. • Push master link cap over pins and past pin notches. • Slide clip-on spring over cap and onto pin notches until both pins are securely locked in place. 3.
ASSEMBLY STEP 5 Tighten the Chain Figure 1 • Spin the inner nut and lock washer down the trolley threaded shaft, away from the trolley. • To tighten the chain, turn outer nut in the direction shown (Figure 1). • When the chain is approximately 1/4" (6 mm) above the base of the rail at its midpoint, re-tighten the inner nut to secure the adjustment. Sprocket noise can result if chain is too loose. When installation is complete, you may notice some chain droop with the door closed. This is normal.
Unfinished Ceiling INSTALLATION STEP 1 OPTIONAL CEILING MOUNT FOR HEADER BRACKET Determine the Header Bracket Location 2x4 Header Wall WARNING Vertical Centerline of Garage Door To prevent possible SERIOUS INJURY or DEATH: • Header bracket MUST be RIGIDLY fastened to structural 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 2x4 into masonry.
INSTALLATION STEP 2 Wall Mount 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).
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.
WARNING CAUTION 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. • Remove foam packaging. • Raise the opener onto a stepladder. You will need help at this point if the ladder is not tall enough.
WARNING 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 garage. Concrete anchors MUST be used if installing any brackets into masonry. CAUTION Three representative installations are shown. Yours may be different. Hanging brackets should be angled (Figure 1) to provide rigid support.
WARNING WARNING INSTALLATION CAUTION STEP 6 WARNING Install the Door Control To prevent possible SERIOUS INJURY or DEATH from electrocution: • Be sure power is not connected BEFORE installing door control. • Connect ONLY to 24 VOLT low voltage wires. To prevent possible SERIOUS INJURY or DEATH from a closing garage door: • Install door control within sight of garage door, out of reach of children at a minimum height of 5 feet (1.5 m), and away from all moving parts of door.
WARNING CAUTION INSTALLATION STEP 7 Install the Lights To prevent possible OVERHEATING of the endpanel or light socket, • DO NOT use short neck or specialty light bulbs. • DO NOT use halogen bulbs. Use ONLY incandescent. • Press the release tabs on both sides of lens. Gently rotate lens back and downward until the lens hinge is in the fully open position. Do not remove the lens. • Install up to a 100 watt maximum light bulb in each socket.
INSTALLATION WARNING STEP 9 WARNING Electrical Requirements To prevent possible SERIOUS INJURY or DEATH from electrocution or fire: • Be sure power is not connected to the opener, and disconnect power to circuit BEFORE removing cover to establish permanent wiring connection. • Garage door installation and wiring MUST be in compliance with all local electrical and building codes. • NEVER use an extension cord, 2-wire adapter, or change plug in any way to make it fit outlet. Be sure the opener is grounded.
WARNING INSTALLATION STEP 10 Install The Protector System ® Be sure power is not connected to the garage door opener BEFORE installing the safety reversing sensor. To prevent SERIOUS INJURY or DEATH from a closing garage door: • Correctly connect and align the safety reversing sensor. This required safety device MUST NOT be disabled. • nstall the safety reversing sensor so beam is NO HIGHER than 6" (15 cm) above garage floor.
INSTALLING THE BRACKETS 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" (15 cm) above the floor. They may be installed in one of three ways, as follows. Figure 1 DOOR TRACK MOUNT (RIGHT SIDE) Door Track Lip Garage door track installation (preferred): • Slip the curved arms over the rounded edge of each door track, with the curved arms facing the door.
MOUNTING AND WIRING THE SAFETY SENSORS • 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 bracket extension (Figure 5). • Finger tighten the wing nuts. • Run the wires from both sensors to the opener. Use insulated staples to secure wire to wall and ceiling. • Strip 7/16" (11 mm) of insulation from each set of wires.
WARNING CAUTION INSTALLATION STEP 11 Fasten the Door Bracket Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of door bracket. Contact your door manufacturer for reinforcement kit. Follow instructions which apply to your door type as 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.
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 bracket with the 1/4"-14x5/8" self-threading screws provided.
INSTALLATION STEP 12 Pulley Connect Door Arm to Trolley 8" (20 cm) min. Follow instructions which apply to your door type as illustrated below and on the following page. Trolley Stop Bolt SECTIONAL DOORS ONLY • Make sure garage door is fully closed. Pull the emergency release handle to disconnect the outer trolley from the inner trolley. Slide the outer trolley back (away from the pulley) about 8" (20 cm) as shown in Figures 1, 2 and 3.
ALL ONE-PIECE DOORS 1. Assemble the door arm, Figure 4: • Fasten the straight and curved door arm sections together to the longest possible length (with a 2 or 3 hole overlap). • With the door closed, connect the straight door arm section to the door bracket with the 5/16"x1-1/4" clevis pin. • Secure with a ring fastener. 2. Adjustment procedures, Figure 5: • On one-piece doors, before connecting the door arm to the trolley, the travel limits must be adjusted.
WARNING ADJUSTMENT STEP 1 Adjust the UP and DOWN Travel Limits Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door. • Incorrect adjustment of garage door travel limits will interfere with proper operation of safety reversal system. • If one control (force or travel limits) is adjusted, the other control may also need adjustment. • After ANY adjustments are made, the safety reversal system MUST be tested.
WARNING ADJUSTMENT STEP 2 Adjust the Force Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door. • Too much force on garage door will interfere with proper operation of safety reversal system. • NEVER increase force beyond minimum amount required to close garage door. • NEVER use force adjustments to compensate for a binding or sticking garage door.
WARNING ADJUSTMENT STEP 3 Test the Safety Reversal System Without a properly installed safety reversal system, persons (particularly small children) could be SERIOUSLY INJURED or KILLED by a closing garage door. • Safety reversal system MUST be tested every month. • If one control (force or travel limits) is adjusted, the other control may also need adjustment. • After ANY adjustments are made, the safety reversal system MUST be tested. Door MUST reverse on contact with 1-1/2" high (3.
WARNING OPERATION IMPORTANT SAFETY INSTRUCTIONS WARNING To reduce the risk of SEVERE INJURY or DEATH: 1. READ AND FOLLOW ALL WARNINGS AND INSTRUCTIONS. 2. ALWAYS keep remote controls out of reach of children. NEVER permit children to operate or play with garage door control push buttons or remote controls. 3. ONLY activate garage door when it can be seen clearly, it is properly adjusted, and there are no obstructions to door travel. 4. ALWAYS keep garage door in sight until completely closed.
Using the Wall-Mounted Door Control To Open the Door Manually WARNING Press the lighted push button to open or close the door. Press again to reverse the door during the closing cycle or to stop the door while it's opening. To prevent possible SERIOUS INJURY or DEATH from a falling garage door: • If possible, use emergency release handle to disengage trolley ONLY when garage door is CLOSED. Weak or broken springs or unbalanced door could result in an open door falling rapidly and/or unexpectedly.
THE REMOTE CONTROL BATTERY CARE OF YOUR OPENER LIMIT AND FORCE ADJUSTMENTS: Weather conditions may FORCE CONTROLS cause some minor changes in door operation requiring some re-adjustments, particularly during the first year of operation. Pages 27 and 28 refer to the LIMIT CONTROLS limit and force adjustments. Only a screwdriver is required. Follow the instructions carefully. Repeat the safety reverse test (Adjustment Step 3, page 29) after any adjustment of limits or force.
HAVING A PROBLEM? 1. My door will not close and the light bulbs blink on my motor unit: The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. • Verify the safety sensors are properly installed, aligned and free of any obstructions. Refer to Installation Step 10: Install The Protector System®. • Check diagnostic LED for flashes on the motor unit then refer to the Diagnostic Chart on the following page.
Bell Wire Diagnostics Located On Motor Unit LED or Diagnostic LED Safety Sensor "Learn" Button Installed Safety Sensor KG KG Your garage door opener is programmed with self-diagnostic capabilities. The “Learn” button/diagnostic LED will flash a number of times then pause signifying it has found a potential issue. Consult Diagnostic Chart below. Diagnostic Chart 1 FLASH Safety sensors wire open (broken or disconnected). OR 2 FLASHES Safety sensors wire shorted or black/white wire reversed.
PROGRAMMING NOTICE: If this Security✚® garage door opener is operated with a non-rolling code transmitter, the technical measure in the receiver of the garage door opener, which provides security against code-theft devices, will be circumvented. The owner of the copyright in the garage door opener does not authorize the purchaser or supplier of the non-rolling code transmitter to circumvent that technical measure.
To Add, Reprogram or Change a Keyless Entry PIN NOTE: Your new Keyless Entry must be programmed to operate your garage door opener. USING THE “LEARN” BUTTON To change an existing, known PIN If the existing PIN is known, it may be changed by one person without using a ladder. 1. Press the four buttons for the present PIN, then press and hold the # button. The opener light will blink twice. Release the # button. 2. Press the new 4-digit PIN you have chosen, then press Enter.
REPAIR PARTS Rail Assembly Parts 2 1 3 4 5 6 KEY NO. PART NO. 1 2 3 4 5 6 4A1008 41C5141-1 41A5665-2 144C56 41A5807 12D598-1 183A163 DESCRIPTION Master link kit Complete trolley assembly Complete rail Idler pulley Chain and cable “U” bracket NOT SHOWN Wear pads Installation Parts 1 4 2 3 KEY PART NO. NO.
Motor Unit Assembly Parts 18 1 2 3 6 4 10 17 6 16 5 7 19 11 8 13 9 7 15 14 Brown Wire (Down) Contact LIMIT SWITCH ASSEMBLY DN Drive Gear Center Limit Contact KEY NO. 1 2 3 4 5 6 7 8 9 10 11 PART NO. 41A5615 41C4220A DESCRIPTION Chain Spreader Gear and sprocket assembly.
ACCESSORIES 953D 3-Button SECURITY✚® Remote Control: Includes visor clip. 7702CB Outside Quick Release: Required for a garage with NO access door. 956D 3-Button Mini-Remote Control with SECURITY✚®: With key ring and fastening strip. 760CB Outdoor Key Switch: Operates the garage door automatically from outside when remote control is not handy. 940D SECURITY✚® Keyless Entry: Enables homeowner to operate garage door opener from outside by entering a password on a specially designed keyboard.
CHAMBERLAIN® SERVICE IS ON CALL OUR LARGE SERVICE ORGANIZATION SPANS AMERICA INSTALLATION AND SERVICE INFORMATION IS AS NEAR AS YOUR TELEPHONE SEVEN DAYS A WEEK. SIMPLY DIAL OUR TOLL FREE NUMBER: 1-800-528-9131 HOURS: (Central Std. Time) 6:00 A.M. TO 7:00 P.M. - Monday through Friday 8:00 A.M. TO 6:00 P.M. - Saturday 8:00 A.M. TO 4:30 P.M. - Sunday www.chamberlain-diy.
