® Garage Door Opener For Residential Use Only (Model Series 1200 - Canada ) Model 1260 - 1/2HP Model 1250 - 1/3HP Model 1255 - 1/2HP Model 1245 - 1/3HP 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.
CONTENTS PAGE A review of safety alert symbols ...............................2 You'll need tools........................................................3 Safety information regarding garage door locks and ropes ...............................................................3 Testing your garage door for sticking, binding and balance ...........................................................3 llustration of sectional door installation ....................4 Illustration of one-piece door installation.......
You'll Need Tools During assembly, installation and adjustment of the opener, instructions will call for hand tools shown below. Pencil Carpenter's Level 1 2 Hack Saw Tape Measure Wire Cutters Drill Stepladder Claw Hammer 3/16", 5/16" and 5/32" Drill Bits 1/2" and 7/16" Sockets and Wrench Pliers Screwdriver Adjustable End Wrench CAUTION WARNING To avoid damage to the garage door and opener, disable locks before installing and operating the opener.
Before you begin, survey your garage area to see whether any of the conditions below apply to your installation. Sectional Door Installation FINISHED CEILING Support bracket & fastening hardware is required. See page 13. Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, steel, aluminum, door with glass panels, etc.). See page 20 for details. Slack in chain tension is normal when garage door is closed.
Opener Carton Inventory Your garage door opener is packaged in two cartons which contain all parts illustrated below. If anything is missing, carefully check the packing material. Parts may be "stuck" in the foam. Hardware for installation is also listed below.
Assembly Section: Pages 6 – 7 Assembly Step 1 CAUTION Attach the T-rail to the Opener To fasten rail, use only those screws mounted in top of the opener. Failure to do so will cause serious damage to the opener. • Remove the two washered screws mounted in top of opener. • Position T-rail at a 45˚ angle to opener so one hole in T-rail and opener line up. • Thread one of the washered screws part way in. Use only these screws! Use of any other screws will cause serious damage to door opener.
Assembly Step 3 Tighten the Chain Outer Nut • Spin the inner nut and lock washer down the threaded shaft, away from the trolley. • To tighten the chain, turn outer nut in the direction shown. As you turn the nut, keep the chain from twisting. • When the chain is approximately 1/2" above the base of the T-rail at its midpoint, re-tighten the inner nut to secure the adjustment. Sprocket noise can result if chain is either too loose or too tight.
Installation Section: Pages 8 – 23 Installation Step 1 WARNING Determine Header Bracket Location If the header bracket is not rigidly fastened to a structural support on the header wall or ceiling, the safety reverse system may not work properly (see page 26). The door might not reverse when required, and could cause serious injury or death. The garage door springs, cables, pulleys, brackets and their hardware are under extreme tension. Do not attempt to loosen, move or adjust them yourself.
ONE-PIECE Door Without Track Read the Safety Instructions on page 8. They also apply to doors without tracks. Unfinished Ceiling Header Wall Vertical Centerline • Close the door and mark the inside vertical centerline of your garage door. Extend the line onto the header wall above door. If headroom clearance is minimal, you can install the header bracket on the ceiling. See page 10.
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. Installation Step 2 Install the Header Bracket Fasten the Header Bracket to the Wall • Center the bracket on the vertical guideline with the bottom edge of the bracket on the horizontal line as shown (with the arrow pointing toward the ceiling).
Installation Step 3 Attach the T-rail to the Header Bracket • Position the opener on the garage floor below the header bracket. Use packing material as a protective base. 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 T-rail to clear the spring. • Position the chain pulley bracket against the header bracket. • Align the bracket holes and join with a clevis pin as shown. • Insert a ring fastener to secure.
Installation Step 4 CAUTION Position the Opener To prevent damage to steel, aluminum, fiberglass or glass panel doors, do not rest the opener on the door without using a 2x4. Follow instructions which apply to your door type as illustrated. SECTIONAL Door & ONE-PIECE Door with Track A 2x4 laid flat is convenient for setting an ideal door-to-T-rail distance. • Raise the opener onto a stepladder. You will need help at this point if the ladder is not tall enough.
Installation Step 5 WARNING Hang the Opener The opener could fall and injure someone if it is not properly secured. Fasten the opener securely to structural supports of the garage. Two representative installations are shown. Yours may be different. Hanging brackets should be angled, Figure 1, to provide rigid support. On finished ceilings, Figure 2, attach a sturdy metal bracket to structural supports before installing the opener. The bracket and fastening hardware are not supplied.
WARNING Installation Step 6 Install the Door Control • Strip 1/4" of insulation from one end of the bell wire; connect the wire to the two screw terminals on the back of the Door Control by color: white to 2 and white/red to 1. • Locate the Door Control within sight of the door at a minimum height of 5 feet where small children cannot reach, and away from all moving parts of the door and door hardware. Fasten the Multi-Function Door Control Panel securely with 6ABx1" screws.
Installation Step 7 Install the Light(s) and the Lens(es) Figure 1 Lens Guide Install the light(s) • Install a 75 watt maximum light bulb in each socket. The light(s) will turn ON and remain lit for approximately 4-1/2 minutes when power is connected. Then the light(s) will turn OFF. • If the bulbs burn out prematurely due to vibration, replace with a "Garage Door Opener" bulb.
Installation Step 9 WARNING Electrical Requirement To prevent electrocution or fire, installation and wiring must be in compliance with local electrical and building codes. Do NOT use an extension cord, 2-wire adapter, or change the plug in any way to make it fit your outlet. 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 fit into a grounding type outlet.
The Protector System® Information you'll need before you begin the installation of the safety reversing sensor. The safety reversing sensor must be connected and aligned correctly before the garage door opener will move in the down direction. This is a required safety device and cannot be disabled. WARNING Without a properly working safety reversing sensor, persons (particularly children) could be injured or killed by a closing garage door. Read and follow all instructions.
Figure 2 Installation Step 10 Garage WALL or DOOR TRACK Installation Install the Safety Reversing Sensor Mounting Bracket With Square Holes Figures 2, 3 and 4 show recommended assembly of bracket(s) and "C" wrap based on the wall installation of the sensors on each side of the garage door as shown on page 17, or on the garage door tracks themselves. For Garage Wall or Door Track Installation • Fasten the "C" wraps to the mounting brackets having square holes, using the hardware shown in Figure 2.
Figure 7 • Center each sensor unit in a "C" wrap with lenses pointing toward each other across the door (see Figure 7). • Secure sensors with the hardware shown. Finger tighten the wing nut on the receiving eye to allow for final adjustment. Securely tighten the sending eye wing nut. Indicator Light Sensor with Wire 1/4-20 x 1-1/2" Hex Bolt • Run the wires from both sensors to the opener. Use insulated staples to secure the wire to wall and ceiling. • Strip 1/4" of insulation from each set of wires.
Door Bracket-Sectional Installation Step 6/96Fasten Door Bracket 11 CAUTION Follow instructions which apply to your door type as illustrated below or on page 21. To prevent damage to steel, aluminum, fiberglass or glass panel doors, always reinforce the inside of the door both vertically and horizontally with angle iron. A horizontal brace should be long enough to be secured to 2 vertical supports. A vertical brace should cover the height of the top panel.
All ONE-PIECE Door Installation Procedure Please read and comply with the warnings and reinforcement instructions on page 20. They apply to one-piece doors also. Header Wall Finished Ceiling 2x4 Support Header Bracket Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, aluminum, steel, door with glass panel, etc.).
Installation Step 12 Connect Door Arm to Trolley Follow instructions which apply to your door type as illustrated below and on page 23. SECTIONAL Doors Only Make sure garage door is fully closed. Pull the manual release handle to disconnect the outer trolley from the inner trolley. Slide the outer trolley back (away from the door) about 2" as shown in Figures 1, 2 and 3. Figure 1: • Fasten straight door arm section to outer trolley with a clevis pin. Secure the connection with a ring fastener.
All ONE-PIECE Doors Assemble the Door Arm: • 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 a clevis pin. • Secure with a ring fastener.
Adjustment Section: Pages 24 – 26 Adjustment Step 1 WARNING Adjust the UP and DOWN Limits Improper adjustment of the travel limits could interfere with the proper operation of the safety reverse system. The door might not reverse properly when required and could seriously injure or kill someone under it. Test the safety reverse system following all adjustments to the travel limits. See page 26. Do not make any limit adjustments until the safety reversing sensors are completely installed.
Adjustment Step 2 WARNING Adjust the Force Too much force on the door will interfere with the proper operation of the safety reverse system. The door might not reverse properly when required and could seriously injure or kill someone under it. Do not increase the force beyond the minimum amount required to close the door. Do not use the force adjustments to compensate for a binding or sticking garage door. Test the safety reverse system following all adjustments to force levels. See page 26.
Adjustment Step 3 WARNING Test the Protector System® Without a properly working safety reversing sensor, persons (particularly children) could be seriously injured or killed if trapped by a closing garage door. Repeat this test once a month. • Press the remote control push button to open the door. • Place the opener carton in the path of the door. • Press the remote control push button to close the door. The door will not move more than an inch, and the opener light(s) will flash.
IMPORTANT SAFETY INSTRUCTIONS WARNING WARNING To reduce the risk of severe injury or death to persons: 1. READ AND FOLLOW ALL INSTRUCTIONS. 2. Do not permit children either to operate or to play with the opener. Keep remote control in a location inaccessible to children. 3. Operate opener only when the door is in full view and free from any obstruction. Keep the door in sight until it is completely closed. NO ONE SHOULD CROSS THE PATH OF THE MOVING DOOR. 4. Check safety reversal system monthly.
Operation of Your Opener Activate the opener with any of the following: • The Remote Control Transmitter. Hold push button down until the door starts to move. • The Door Control. Hold button/push bar down until the door starts to move. • The Outside Keylock or Keyless Entry. (See Accessories) WARNING Weak or broken springs could allow an open door to fall (either rapidly or unexpectedly), resulting in serious injury, death or property damage.
Receiver and Remote Control Programming NOTICE: To comply with FCC/IC rules, adjustment or modifications of this receiver and/or transmitter are prohibited, except for changing the code setting or replacing the battery. THERE ARE NO OTHER USER SERVICEABLE PARTS. WARNING Children operating or playing with a garage door opener can injure themselves or others. The garage door could close and cause serious injury or death. Do not allow children to operate the Door Control or remote control transmitter(s).
Having a Problem? Situation Probable Cause & Solution The opener doesn't operate from either the Door Control or the remote control: 1. Does the opener have electric power? Plug a lamp into the outlet. If it doesn't light, check the fuse box or the circuit breaker. (Some outlets are controlled by a wall switch.) 2. Have you disabled all door locks? Review installation instruction warnings on page 7. 3. Is there a build-up of ice or snow under the door? The door may be frozen to the ground.
Having a Problem? (continued) Situation Probable Cause & Solution The door opens but won't close: 1. If the opener lights blink, check the safety reversing sensor. See page 19. 2. If the opener lights do not blink and it is a new installation, check the down force. See Adjustment Step 2, page 25. For an existing installation, see below. Repeat the safety reverse test after the adjustment is complete. The door reverses for no apparent reason and opener lights don't blink: 1.
Repair Parts Rail Assembly Parts 5 3 1 E AS RE IL G 3A4 .8 O N 4 RA 6 2 Installation Parts C D 2V KEY NO. PART NO. DESCRIPTION 1 2 3 4 5 6 1A995 41A4813 41A3489 183B99 41D3484 83A4 Master link kit Chain pulley bracket Complete trolley assembly One-piece T-rail Full chain assembly Rail grease 7 3 5 1 LOCK 4 LIGHT 1 KEY NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PART NO.
Repair Parts Opener Assembly Parts 1 (1260, 1250) 5 2 (1255, 1245) 4 3 8 7 8 7 21 17 20 9 18 19 10 11 (1260, 1250) 6 3 (1260, 1250) 8 (Down) Contact Brown Wire LIMIT SWITCH ASSY. DN UP Drive Gear Center Limit Contact (Up) Contact 14 16 17 (1255, 1245) (1260, 1250) 12 15 Grey Wire Yellow Wire 13 PART NO. DESCRIPTION KEY NO. PART NO.
Accessories Available For Your Opener Model 1702LMC Outside Quick Release: Model 61LMC Single-Function Standard Size Remote Control: Includes visor clip. Model 81LMC "Smart" Remote Control: Includes visor clip. Model 82LMC 2-Channel "Smart" Remote Control: Includes visor clip. 10 foot Complete Rail: To allow a 10 foot door to open fully. Model 83LMC 3-Channel "Smart" Remote Control: Includes visor clip.
Index Access Door/Outside Quick Release Accessory..........................................................................................4, 34 Electrical Safety Warnings....................................................................................................................2, 7, 16, 27 Garage Door Testing for balance, binding and sticking...................................................................................................3, 25, 27 Determining high point of travel: Sectional Door .
LIFT-MASTER SERVICE IS ON CALL OUR LARGE SERVICE ORGANIZATION SPANS AMERICA AND CANADA INSTALLATION AND SERVICE INFORMATION IS AS NEAR AS YOUR TELEPHONE SIX DAYS A WEEK. SIMPLY DIAL OUR TOLL FREE NUMBER: HOW TO ORDER REPAIR PARTS Selling prices will be furnished on request or parts will be shipped at prevailing prices and you will be billed accordingly. WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOLLOWING INFORMATION: • PART NUMBER • PART NAME 1-800-654-4736 • MODEL NUMBER HOURS: (Mountain Std.
