Instruction/ maintenance manual of the product 1280 - 1/2 HP Chamberlain
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TM The Chamberlain Group, Inc. A DUCHOSSOIS ENTERPRISE 845 Larch Avenue Elmhurst, Illinois 60126-1196 Garage Door Opener OWNER'S MANUAL Model 1280 - 1/2 HP - For Residential Use Only Complies wit.
Start by reviewing these important safety alert symbols 2 Contents Page A review of safety alert symbols .............................2 Safety information regarding garage door locks and ropes...........................................................
3 SECTIONAL DOOR ONE-PIECE DOOR T o avoid damage to the garage door and opener , disable locks before installing and operating the opener . Use a wood screw or nail to hold locks in the "open" (unlocked) position. Operation at other than 120V 60 Hz will cause opener malfunction and damage.
4 Y ou may find it helpful to refer back to this page as you proceed with the installation of your opener . Safety Reversing Sensor Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, steel, aluminum, door with glass panels, etc.
5 Straight Door Arm Section Door Bracket Plate Door Bracket Curved Door Arm Section Safety Labels and Literature Header Bracket UP CEILING MOUNT ONLY Safety Reversing Sensor Mounting Bracket With Squa.
ASSEMBL Y STEP 1 Attach the T -Rail T o the Opener To fasten rail, use only those screws mounted in the top of the opener. Any other screws will cause serious damage to the opener. 6 • Remove the two washered screws mounted in top of opener. • Align T-rail and styrofoam over opener sprocket.
ASSEMBL Y STEP 3 Attach the Belt Cap Retainer 7 IMPORT ANT INST ALLA TION INSTRUCTIONS T o reduce the risk of severe injury or death to persons: 1. READ AND FOLLOW ALL INST ALLA TION INSTRUCTIONS 2. Install only on a properly balanced and lubricated garage door .
• Open your door to the highest point of travel as shown. Draw an intersecting horizontal line on the header wall 2" above the high point. This height will provide travel clearance for the top edge of the door. Header Wall Ceiling Track Highest Point of Travel Door 2" 8 Proceed to Step 2, page 10.
Header Wall Vertical Centerline Vertical Centerline of Garage Door 2x4 Unfinished Ceiling Structural Supports 2x4 Header Support OPTIONAL CEILING MOUNT FOR HEADER BRACKET • Close the door and mark the inside vertical centerline of your garage door .
Lag Screws 5/16"x9x1-5/8" Highest Point of Travel (of Garage Door) Vertical Center Line Header Wall Garage Door Mounting New Header Bracket 10/16/91 - 10/26/91 - 4/5/.
Header Bracket Belt Pulley Bracket Temporary Support Header Wall Garage Door The Chamberlain Group, Inc. Liftmaster Synchro Drive Attach Tee Rail to Header Brac k 5/16/92 T-rail Clev.
Installation Step 4 Position the Opener Follow instructions which apply to your door type as illustrated. To prevent damage to steel, aluminum, fiberglass or glass panel doors, do not rest the opener on the door without using a 2x4.
Installation Step 5 Hang the Opener 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.
Opener Terminal Screws Antenna Right Panel of Opener Multi-Function Door Control Panel Multi-Function Door Control Panel Terminal Screws WHITE RED The Chamberlain Group, Inc. Liftmaster Belt Drive CDO Install Wall Control 3/5/92 - 3/13/92 LIGHT LOCK Door Control Button Light Button Lock Button KG KG M.
• Install a 75 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 . • If the bulbs burn out prematurely due to vibration, replace them with "Garage Door Opener" bulbs.
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. If the plug doesn't fit into the outlet you have, contact a qualified electrician to install the proper outlet.
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. Installation procedures are the same for sectional and one-piece doors.
1/4 x 1-1/2" Lag Screw #10 - 32 x 3/8" Screw 1/4" - 20 Lock Nut #10 x 32 Lock Nut Staples 1/4" - 20 x 1/2" Carriage Bolts Installation Step 10 Install .
Invisible Light Beam Protection Area Sensor Sensor Connect Wire to Opener Terminals The Chamberlain Group, Inc. Attaching Sensor to "C" Wrap and Wires to Operator Liftmaster Sync.
Installation Step 1 1 Fasten Door Bracket Follow instructions which apply to your door type as illustrated below or on page 21. T o prevent damage to steel, aluminum, fiberglass or glass panel doors, always reinforce the inside of the door both vertically and horizontally with an angle iron.
Horizontal and vertical reinforcement is needed for lightweight garage doors (fiberglass, aluminum, steel, door with glass panel, etc.). Header Wall Vertical Centerline of Garage Do.
Installation Step 12 Connect Door Arm to T rolley Follow instructions which apply to your door type as illustrated below and on page 23. Make sure garage door is fully closed. Pull the emergency release handle to disconnect the outer trolley from the inner trolley .
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.
Adjustment Step 1 Adjust the UP and DOWN Limits Do not make any limit adjustments until the Safety Reversing Sensors are completely installed. 24 Limit adjustment settings regulate the points at which the door will stop when moving up or down. The door will stop in the up direction if anything interferes with door travel.
Adjustment Step 2 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.
Adjustment Step 4 T est the Safety Reverse System Test • Place a one-inch board (or a 2x4 laid flat) on the floor, centered under the garage door. • Operate the door in the down direction. The door must reverse on striking the obstruction. Adjustment If the door stops on the obstruction, it is not traveling far enough in the down direction.
The remote control transmitter The opener must learn the code of any new remote control. Page 29 explains how to program your receiver and how to erase all codes if required. Self service of your receiver and remote controls is not recommended. If service is needed, call the toll-free number listed on the back page.
T o open the door manually: The door should be fully closed if possible. Pull down on the manual release handle and lift the door manually . T o reconnect the door to the opener , press the Door Control push bar . 28 Activate the opener with any of the following: • The Remote Control T ransmitter .
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(s) or remote control transmitter(s). A moving garage door could injure or kill someone under it.
Having a Problem? Situation Probable Cause & Solution The opener doesn't operate from either the door control or the remote control: Opener operates from remote control, but not from door con.
Having a Problem? (continued) Situation Probable Cause & Solution The door reverses for no apparent reason and opener lights don't blink: The door reverses for no apparent reason and opener l.
10 UP CEILING MOUNT ONLY 7 13 12 11 12VDC 2 5 NOTICE 6 9 8 3 LIGHT LOCK 1 14 15 16 4 2 1 5 6 3 7 RAIL GREASE NO. 83A4 8 4 Rail Assembly Parts Installation Parts 32 KEY PART NO.
Repair Parts Opener Assembly Parts 2 12 10 15 4 3 DN UP Brown Wire (Down) Contact LIMIT SWITCH ASSY. Grey Wire Yellow Wire (Up) Contact Center Limit Contact Drive Gear 11 5 6 7 9 8 9 8 20 14 13 16 1 3 18 19 17 5 KEY P ART NO. NO. DESCRIPTION 1 41A4371 Belt cap retainer 2 41A4885 Gear and sprocket assy .
Accessories A vailable For Y our Opener Model 83LM Model 742LM Model 84LM Model 60 Model 66LM Model 1702 3-Channel Remote Control: Includes visor clip. 4-Channel Remote Control: Includes visor clip. Keyless Entry: Enables homeowner to operate garage door opener from outside by entering code on specially designed keyboard.
Index Access Door/Outside Quick Release Accessory ........................................................................................31, 34 Electrical Safety Warnings ...............................................................................
© 1996, The Chamberlain Group, Inc. 114A1945D-xxx All Rights Reserved Printed in Mexico LIFT -MASTER SER VICE IS ON CALL OUR LARGE SERVICE ORGANIZATION SPANS AMERICA INSTALLATION AND SERVICE INFORMATION IS AS NEAR AS YOUR TELEPHONE SIX DAYS A WEEK. SIMPLY DIAL OUR TOLL FREE NUMBER : 1-800-528-2817 HOURS: (Mountain Std.
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