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The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
®
GARAGE DOOR OPENER
Model 2500C
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 located on
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TABLE OF CONTENTS Introduction Pages 2-5 Adjustment Pages 24-26 Safety symbol review and signal word review ............2 Program the travel limits ...........................................24 Preparing your garage door ........................................3 Adjust the force .........................................................25 Tools ............................................................................3 Test the safety reversal system.................................26 ® Plannin
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1 Preparing your garage door WARNING WARNING Before you begin: To prevent possible SERIOUS INJURY OR DEATH: • Disable locks. • ALWAYS call a trained door systems technician if • Remove any ropes connected to garage door. CAUTION WARNING garage door binds, sticks, or is out of balance. An unbalanced garage door may not reverse when • Complete the following test to make sure your required. garage door is balanced and is not sticking or • NEVER try to loosen, move or adjust garage door, door bind
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— — — — — — — — 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 as you proceed with the installation of your opener. FINISHED CEILING SECTIONAL DOOR INSTALLATION Support bracket & fastening hardware is required. See page 13 Horizontal and vertical reinforcement is needed for lightweight garage
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Carton Inventory Your garage door opener is packaged in two cartons check the packing material. Parts may be stuck in the which contain the motor unit and the parts illustrated foam. KEEP THE FOAM INTACT (see page 6.) below. Note that accessories will depend on the model purchased. If anything is missing, carefully Remote Control Transmitter Visor Clip SECURITY✚ Belt Cap Retainer 3-Channel Remote Control Multi-Function Multi-Function Door Control Panel Door Control Panel Model 79LMC Model 79L
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WARNING WARNING ASSEMBLY STEP 1 CAUTION WARNING Fasten Rail to the Motor Unit To avoid SERIOUS damage to garage door opener, use ONLY those bolts/fasteners mounted in the top of To avoid installation difficulties, do not run the the opener. garage door opener until instructed to do so. • Remove the two washered bolts mounted in top of Washered Bolts motor unit. 5/16"-18x1/2" Motor Unit Sprocket • Align rail and styrofoam over sprocket. Cut tape from rail, belt and styrofoam. • REMOVE STYROFOAM
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ASSEMBLY STEP 3 WARNING WARNING Attach the Belt Cap Retainer To avoid possible SERIOUS INJURY to fingers from moving garage door opener: • Position the belt cap retainer over the motor unit CAUTION WARNING • ALWAYS keep hand clear of sprocket while operating sprocket so the three holes in cap align with the opener. three holes in mounting plate. Attach with #8x3/8" • Securely attach sprocket cover BEFORE operating. hex screws provided. You have now finished assembling your garage door opener. Pl
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INSTALLATION STEP 1 Finished Vertical Determine the Header Bracket Ceiling Centerline Location Header Structural 2x4 Wall Supports WARNING WARNING To prevent possible SERIOUS INJURY or DEATH: • Header bracket MUST be RIGIDLY fastened to CAUTION WARNING 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 Vertical bracket or 2x4 into masonry. Centerline •
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ONE-PIECE DOOR WITHOUT TRACK Unfinished 1. Close the door and mark the inside vertical Ceiling centerline of your garage door. Extend the line Structural onto the header wall above door, as shown. Supports Header Wall Vertical If headroom clearance is minimal, you can install Centerline the header bracket on the ceiling. See page 10. 2x4 2x4 If you need to install the header bracket on a 2x4 (on wall or ceiling), use lag screws (not supplied) OPTIONAL to securely fasten the 2x4 to structural sup
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INSTALLATION STEP 2 Install the Header Bracket You can attach the header bracket either to the wall Wall Mounting Holes above the garage door, or to the ceiling. Follow the CEILING MOUNT ONLY instructions which will work best for your particular The nail hole is for positioning only. requirements. Do not install the header bracket You must use lag screws UP over drywall. If installing into masonry, use to mount the header bracket. concrete anchors (not provided). WALL HEADER BRACKET INSTALLATI
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INSTALLATION STEP 3 Attach the Rail to the Header Bracket • 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 temporary support to allow the rail to clear the spring. • Position the rail bracket against the header bracket. • Align the bracket holes and join with a clevis pin as shown. Header Wall • Insert a ring fastener to secure. Hea
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WARNING WARNING INSTALLATION STEP 4 CAUTION WARNING 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. 2x4 laid flat • Raise the opener onto a stepladder. You will need Rail help at this point if the ladder is not tall enough. • Open the door a
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INSTALLATION STEP 5 WARNING WARNING Hang the Opener To avoid possible SERIOUS INJURY from a falling garage door opener, fasten it SECURELY to structural Three representative installations are shown. Yours CAUTION WARNING supports of the garage. Concrete anchors MUST be used may be different. Hanging brackets should be if installing any brackets into masonry. angled, Figure 1, to provide rigid support. On finished ceilings, Figure 2, attach a sturdy metal bracket to structural supports before ins
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LIGHT LIGHT LIGHT WARNING WARNING INSTALLATION STEP 6 CAUTION WARNING Install the Door Control To prevent possible SERIOUS INJURY or DEATH from electrocution: Locate door control within sight of the door at a • Be sure power is not connected BEFORE installing door minimum height of 5 feet where small children cannot control. reach, and away from moving parts of the door and • Connect ONLY to 24 VOLT low voltage wires. door hardware. The installation surface must be To prevent possible SERIOUS I
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NOTICE INSTALLATION STEP 7 Release Tab Lens Install the Lights and Lens • Press the release tabs on both sides of lens. Gently rotate lens back and downward until the lens Lens Hinge hinge is in the fully open position. Do not remove Release the lens. Tab Slot • Install up to a 100 watt maximum light bulb in each socket. The lights will turn ON and remain lit for approximately 4-1/2 minutes when power is connected. Then the lights will turn OFF. Lens Hinge Slots • Reverse the procedure to clos
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INSTALLATION STEP 9 WARNING WARNING Electrical Requirements To prevent possible SERIOUS INJURY or DEATH from electrocution or fire: To avoid installation difficulties, do not run the CAUTION WARNING • 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 • Garage door installation and wiri
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INSTALLATION STEP 10 WARNING WARNING ® 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 CAUTION WARNING and aligned correctly before the garage door • To prevent SERIOUS INJURY or DEATH from a closing opener will move in the down direction. This is a garage door: required safety device and cannot be disabled. – Correctly connect and align the safety reversing sensor
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INSTALLING THE BRACKETS Figure 1 DOOR TRACK MOUNT (RIGHT SIDE) 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 Door Track higher than 6" above the floor. They may be installed Lip in one of three ways, as follows. Indicator Garage door track installation (preferred): light • Slip the curved arms over the rounded edge of each door track, with the curved arms facing the door. Snap into place a
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MOUNTING AND WIRING THE SAFETY SENSORS Figure 4 • Slide a 1/4"-20x1/2" carriage bolt head into the slot on each sensor. Use wing nuts to fasten sensors to Wing nut brackets, with lenses pointing toward each other across the door. Be sure the lens is not obstructed by a bracket extension (Figure 4). Carriage bolt • Finger tighten the wing nuts. 1/4"-20x1/2" Lens • Run the wires from both sensors to the opener. Use insulated staples to secure wire to wall and ceiling. TROUBLESHOOTING THE SAFETY
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WARNING WARNING INSTALLATION STEP 11 CAUTION WARNING Fasten the Door Bracket To prevent damage to garage door, reinforce inside of door with angle iron both vertically and horizontally. 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 Header Bracket supports. A vertical reinforcement brace should cover the height of the top panel. Figure 1 shows one piec
