Instruction/ maintenance manual of the product POWER DRIVE 248735S 3/4 HP Chamberlain
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The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.chamberlain.com GARAGE DOOR OPENER Model 248735S 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.
2 TABLE OF CONTENTS When you see these Safety Symbols and Signal Words on the following pages, they will alert you to the possibility of serious injury or death if you do not comply with the warnings that accompany them. The hazard may come from something mechanical or from electric shock.
3 To prevent damage to garage door and opener: • ALWAYS disable locks BEFORE installing and operating the opener. • ONLY operate garage door opener at 120V, 60 Hz to avoid malfunction and damage. To prevent possible SERIOUS INJURY or DEATH: • ALWAYS call a trained door systems technician if garage door binds, sticks, or is out of balance.
4 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 fi nd it helpful to refer back to this page and the accompanying illustrations as you proceed with the installation of your opener.
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 hardware for the door bracket (Step 11).
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.
7 Hardware Inventory Separate all hardware and group as shown below for the assembly and installation procedures. ASSEMBLY HARDWARE INSTALLATION HARDWARE Bolt 1/4"-20x1-3/4" (1) Bolt 1/4&quo.
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 the bottom.
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.
10 To avoid possible SERIOUS INJURY to fi ngers from moving garage door opener: • ALWAYS keep hand clear of sprocket while operating opener. • Securely attach chain spreader BEFORE operating. Figure 2 Figure 3 ASSEMBLY STEP 4 Install the Chain/Cable 1.
11 INSTALLATION ASSEMBLY STEP 5 Tighten the Chain • 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).
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.
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.
14 INSTALLATION STEP 3 Attach the Rail to the Header Bracket • Position the opener on the garage fl oor 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 temporary support to allow the rail to clear the spring.
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 opener.
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.
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.
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.
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.
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.
21 Figure 5 Figure 7 Figure 6 Figure 8 Figure 9 Carriage Bolt 1/4"-20x1/2" Wing Nut 1/4"-20 Lens Safety Reversing Sensor Wires 7/16" (11 mm) 7/16" (11 mm) Pre-Installed Wires .
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.
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 the following page.
24 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.
25 INSTALLATION STEP 12 Connect Door Arm to Trolley Follow instructions which apply to your door type as illustrated below and on the following page. SECTIONAL DOORS ONLY • Make sure garage door is fully closed. Pull the emergency release handle to disconnect the outer trolley from the inner trolley.
26 ALL ONE-PIECE DOORS 1. Assemble the door arm, Figure 5: IMPORTANT: The groove on the straight door arm MUST face away from the curved door arm. • Fasten the straight and curved door arm sections together to the longest possible length (with a 2 or 3 hole overlap).
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.
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 down direction and stops in the up direction.
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 adjustment.
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 Security ✚ ® Keyless Entry System.
31 TO RE-CONNECT THE TROLLEY: Pull the emergency release handle toward the opener at an angle so that the trolley release arm is horizontal. The trolley will reconnect on the next UP or DOWN operation, either manually or by using the door control or remote.
32 The lithium battery should produce power for up to 5 years. To replace battery, use the visor clip or screwdriver blade to pry open the case as shown. Insert battery positive side up (+). Dispose of old battery properly. Replace the battery with only 3V2032 coin cell batteries.
33 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 reversing sensors are properly installed, aligned and free of any obstructions.
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.
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.
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.
37 KEY NO. PART NO. 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 ro.
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 5 6 6 7 8 9 10 11 12 13 14 15 16 17 KEY NO. PART NO. DESCRIPTION 1 41A5615 Chain Spreader 2 41A5585 Gear and sprocket assembly.
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 specially designed keyboard.
© 2011, The Chamberlain Group, Inc. 114A4256B All Rights Reserved CHAMBERLAIN ® ONE YEAR LIMITED WARRANTY 10 YEAR MOTOR LIMITED WARRANTY The Chamberlain Group, Inc.
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