Chamberlain 248735S 3/4 HP - Manual

5 Planning (Continued) 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 hardw...

6 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. PARTS MAY BE STUCK IN THE FOAM. Hardware for assembly and installation is s...

8 ASSEMBLY STEP 1 Assemble the Rail & Install the Trolley To avoid installation diffi culties, 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 illustration). The hole above this window is larger on the top of the rail than on...

9 To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of the opener. ASSEMBLY STEP 2 Fasten the Rail to the Motor Unit • Insert a 1/4"-20x2" bolt, washer and spacer into the cover protection bolt hole on the back end of the rail as shown. Tighten ...

12 Installation procedures vary according to garage door types. Follow the instructions which apply to your door. 1. Close the door and mark the inside vertical centerline of the garage door. 2. Extend the line onto the header wall above the door. You can fasten the header bracket within 4 feet (1.2...

13 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, ...

14 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 t...

15 INSTALLATION STEP 5 Hang the Opener Three representative installations are shown. Yours may be different. Hanging brackets should be angled (Figure 1) to provide rigid support. On fi nished ceilings (Figure 2 and Figure 3), attach a sturdy metal bracket to structural supports before installing the...

16 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, o...

17 INSTALLATION STEP 7 Install the Lights • 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 a 100 watt maximum light bulb in each socket. Light bulb size should be A19, standard n...

18 INSTALLATION STEP 9 Electrical Requirements To avoid installation diffi culties, do not run the opener at this time. To reduce the risk of electric shock, your garage door opener has a grounding type plug with a third grounding pin. This plug will only fi t into a grounding type outlet. If the plug...

19 Facing the door from inside the garage. INSTALLATION STEP 10 Install The Protector System ® The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. IMPORTANT INFORMATION ABOUT THE SAFETY REVERSING SENSOR When properly conn...

20 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 fl oor. They may be installed in one of three ways, as follows. Garage door track in...

22 ALIGNING THE SAFETY REVERSING SENSORS • Plug in the opener. The indicator lights in both the sending and receiving eyes will glow steadily if wiring connections and alignment are correct. The sending eye orange indicator light will glow regardless of alignment or obstruction. If the green indicat...

23 Fiberglass, aluminum or lightweight steel garage doors WILL REQUIRE reinforcement BEFORE installation of door bracket. Contact your door manufacturer for reinforcement kit. INSTALLATION STEP 11 Fasten the Door Bracket Follow instructions which apply to your door type as illustrated below or on th...

27 ADJUSTMENT STEP 1 Adjust the UP and DOWN Travel Limits Limit adjustment settings regulate the points at which the door will stop when moving up or down. To operate the opener, press the Door Control push bar. Run the opener through a complete travel cycle. • Does the door open and close completel...

28 ADJUSTMENT STEP 2 Adjust the Force Force adjustment controls are located on the right panel of the motor unit. Force adjustment settings regulate the amount of power required to open and close the door. If the forces are set too light, door travel may be interrupted by nuisance reversals in the d...

29 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 adj...

30 OPERATION Using Your Garage Door Opener Your Security ✚ ® opener and hand-held remote control have been factory-set to a matching code which changes with each use, randomly accessing over 100 billion new codes. Your opener will operate with up to eight Security ✚ ® remote controls and one Securit...

34 Your garage door opener is programmed with self-diagnostic capabilities. The “Learn” button/diagnostic LED will fl ash a number of times then pause signifying it has found a potential issue. Consult Diagnostic Chart below. Installed Safety Reversing Sensor Bell Wire DiagnosticsLocated OnMotor Unit...

35 1. Press and release the “learn” button on the motor unit. The learn indicator light will glow steadily for 30 seconds. 2. Within 30 seconds, press and hold the button on the hand-held remote* that you wish to operate your garage door. 3. Release the button when the motor unit lights blink. It ha...

36 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 USING THE DOOR CONTROL NOTE: This method requires two people if the Keyless Entry is already mounted outside the garage. 1. Press and releas...

37 KEY NO. PARTNO. DESCRIPTION 1 41A5273-14 Multi-Function door control 2 953D 3-Button remote control 3 10A20 3V2032 Lithium battery 4 29B137 Remote control visor clip 5 41A2828 Emergency release rope and handle assembly 6 41B4494-1 2-Conductor bell wire, white and white/red 7 41A5047-1 Door bracke...

38 Motor Unit Assembly Parts LIMIT SWITCH ASSY. Brown Wire (Down) Contact Grey Wire Yellow Wire (Up) Contact Center Limit Contact Drive Gear 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 KEY NO. PART NO. DESCRIPTION 1 41A5615 Chain Spreader 2 41A5585 Gear and sprocket assembly. Complete with: Spring ...

39 ACCESSORIES 953D 3-Button SECURITY ✚ ® Remote Control : Includes visor clip. 956D 3-Button Mini-Remote Control with SECURITY ✚ ® : With key ring and fastening strip. 940D SECURITY ✚ ® Keyless Entry : Enables homeowner to operate garage door opener from outside by entering a password on a speciall...

© 2011, The Chamberlain Group, Inc. 114A4256 All Rights Reserved CHAMBERLAIN ® ONE YEAR LIMITED WARRANTY 10 YEAR MOTOR LIMITED WARRANTY The Chamberlain Group, Inc. (“Seller”) warrants to the fi rst retail purchaser of this product, for the residence in which this product is originally installed, that...