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The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196
www.liftmaster.com
®
®
GARAGE DOOR OPENER
Model Series 1200
For Residential Use Only
Model 1256R - 1/2HP
Model 1255R - 1/2HP
Model 1246R - 1/3HP
Model 1245R - 1/3HP
Model 1240R - 1/4HP
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.
■
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TABLE OF CONTENTS Introduction 2-7 Adjustment 28-30 Safety symbol and signal word review........................2 Adjust the travel limits ...............................................28 Preparing your garage door ........................................3 Adjust the force .........................................................29 Tools needed...............................................................3 Test the safety reversal system.................................30 ® Planning ..........
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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 CAUTION WARNING Remove any ropes connected to garage door. 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 binding: • NEVER try to loosen, move or adjust garage door, d
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— — — — — — — — Do you have an access door in addition to the Planning garage door? If not, Model 1702 Outside Quick Identify the type and height of your garage door. Release is required. See Accessories page. Survey your garage area to see if any of the Look at the garage door where it meets the floor. conditions below apply to your installation. Additional Any gap between the floor and the bottom of the materials may be required. You may find it helpful to door must not exce
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Slack in chain tension is normal when garage door is closed. Planning (Continued) WARNING WARNING ONE-PIECE DOOR INSTALLATIONS Without a properly working safety reversal system, persons (particularly small children) could be Generally, a one-piece door does not require CAUTION WARNING SERIOUSLY INJURED or KILLED by a closing garage reinforcement. If your door is lightweight, refer to door. the information relating to sectional doors in • The gap between the bottom of the garage door and Instal
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Carton Inventory Your garage door opener is packaged in two cartons the foam. Hardware for assembly and installation is which contain the motor unit and all parts illustrated shown on the next page. Save the carton and below. Note that accessories will depend on the packing material until installation and adjustment is model purchased. If anything is missing, carefully complete. check the packing material. Parts may be stuck in All Models except 1256R & 1246R ® Sprocket Cover Styrofoam SECURITY✚
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NOTICE Hardware Inventory Separate all hardware and group as shown below for the assembly and installation procedures. INSTALLATION HARDWARE Lag Screw Hex Bolt Lock Washer 5/16" (4) 5/16"-18x7/8" (4) Rail Grease 5/16"-9 x1-5/8" (2) Lag Screw Handle 5/16"-18x1-7/8" (2) Nut 5/16"-18 (4) Ring Fastener (3) Rope Self-Threading Screw Dry Wall Carriage Bolts Staples (30) Wing Nut 1/4"-14x5/8" (2) 1/4"-20x1/2" (2) Anchors (2) 1/4"-20 (2) Clevis Pin Clevis Pin Clevis Pin 5/16"x2-3/4" (1) 5/16"x1" (1) 5/1
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WARNING WARNING ASSEMBLY STEP 1 CAUTION WARNING 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. MODELS 1255R 1245R, and 1240R (For Models 1256R and 1246R see page 9) Remove the two washered bolts mounted in top of Washered Bolt motor unit. 5/16"-18x1/2" USE ONLY THIS Position rail at an angle to opener so one hole in TYPE AND SIZE Styrofoam rail and motor unit line up. BOLT Rail Hole Thread o
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WARNING WARNING CAUTION ASSEMBLY STEP 1 WARNING 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. MODELS 1256R and 1246R ONLY Remove the two washered bolts mounted in top of Styrofoam motor unit. Packaging Align rail and styrofoam over sprocket. Chain Cut tape from rail, chain and styrofoam. Remove Rail styrofoam and pull the chain back (away from the USE ONLY THIS Washered TYPE AND SIZE Bolts
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ASSEMBLY STEP 2 WARNING WARNING Attach the Chain Spreader To avoid possible SERIOUS INJURY to fingers from and Re-install the Chain moving garage door opener: CAUTION WARNING • ALWAYS keep hand clear of sprocket while operating MODELS 1256R AND 1246R ONLY opener. • Securely attach sprocket cover BEFORE operating. Line up the holes in the chain spreader with the holes in the motor unit as shown. The slot in the chain spreader must fit over the Rail flange (Figure 1). #8x1" Hex Screw Securely
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ASSEMBLY STEP 5 Lock Washer Outer Nut Tighten the Chain Inner Nut To Tighten Outer Nut ALL MODELS To Tighten Spin the inner nut and lock washer down the Inner Nut trolley threaded shaft, away from the trolley. To tighten the chain, turn outer nut in the direction shown. AS YOU TURN THE NUT, KEEP THE Trolley CHAIN FROM TWISTING. When the chain is approximately 1/2" (13 mm) above the base of the rail at its midpoint, re-tighten Chain the inner nut to secure the adjustment. Sprocket noise can
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INSTALLATION STEP 1 Finished Determine the Header Bracket Ceiling 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 Centerline bracket or 2x4 into masonry. of Garage Door • NEVE
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ONE-PIECE DOOR WITHOUT TRACK Unfinished Ceiling 1. Close the door and mark the inside vertical centerline of your garage door. Extend the line Structural onto the header wall above door, as shown. Supports Header Wall If headroom clearance is minimal, you can install 2x4 the header bracket on the ceiling. See page 14. 2x4 If you need to install the header bracket on a 2x4 (on wall or ceiling), use lag screws (not provided) OPTIONAL to securely fasten the 2x4 to structural supports CEILING MOUNT
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INSTALLATION STEP 2 Install the Header Bracket Wall Mounting Holes You can attach the header bracket either to the wall CEILING MOUNT ONLY above the garage door, or to the ceiling. Follow the The nail hole is for positioning only. instructions which will work best for your particular You must use lag screws UP requirements. Do not install the header bracket to mount the header bracket over drywall. If installing into masonry, use concrete anchors (not provided). Optional WALL HEADER BRACKET I
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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. Header Wall Position the rail bracket against the header Header Bracket bracket. Align the bracket holes and join with a clevis pin Chain Pulley Bracket as shown. Inser
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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 2x4 A 2x4 laid flat is convenient for setting an ideal door- Rail laid flat to-rail distance. Raise the opener onto a stepladder. You will need 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 Two representative installations are shown. Yours CAUTION supports of the garage. Concrete anchors MUST be used WARNING may be different. Hanging brackets should be angled if installing any brackets into masonry. (Figure 1) to provide rigid support. On finished ceilings (Figure 2), attach a sturdy metal bracket to structural supports before inst
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WARNING WARNING INSTALLATION STEP 6 CAUTION WARNING Install the Door Control To prevent possible SERIOUS INJURY or DEATH from electrocution: Locate the door control within sight of the door at a • Be sure power is not connected BEFORE installing door minimum height of 5 feet (1.5 m) where small control. children cannot reach, and away from all moving • Connect ONLY to 24 VOLT low voltage wires. parts of the door and door hardware. To prevent possible SERIOUS INJURY or DEATH from a 1. Strip 1/4"
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NOTICE INSTALLATION STEP 7 Install the Light and Lens INSTALL THE LIGHT Install a 75 watt maximum light bulb in the socket. Panel Screw The light will turn ON and remain lit for Light approximately 4-1/2 minutes when power is Lens Lens Slot connected. Then the light will turn OFF. Use standard neck Garage Door Opener bulbs for replacement 75 Watt Max. Light Bulb Lens Tab INSTALL THE LENS (All models except 1240R) Locate and loosen (approximately 1/8" (3 mm)) the two screws near top of op
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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
