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Chamberlain 1280 IMPORTANT INSTALLATION INSTRUCTIONS, To reduce the risk of severe injury or death:

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ASSEMBLY STEP 3

Attach the Belt Cap Retainer

• Position the belt cap retainer over the motor unit

sprocket so the two holes in cap align with the two

holes in mounting plate. Attach with #8x3/8" hex

screws provided.

You have now finished assembling your garage

door opener. Please read the following warnings

before proceeding to the installation section.

8x3/8" Hex Screws Belt Cap

Retainer

Motor Unit

Sprocket

Mounting Plate

IMPORTANT INSTALLATION INSTRUCTIONS

1. READ AND FOLLOW ALL INSTALLATION WARNINGS

AND INSTRUCTIONS.

2. Install garage door opener only on properly balanced

and lubricated garage door. An improperly balanced

door may not reverse when required and could result in

severe injury or death.

3. All repairs to cables, spring assemblies and other

hardware MUST be made by a trained door systems

technician before installing opener.

4. Disable all locks and remove all ropes connected to

garage door before installing opener to avoid

entanglement.

5. Install garage door opener 7 feet or more above floor.

6. Mount emergency release handle 6 feet above floor.

7. NEVER connect garage door opener to power source

until instructed to do so.

8. NEVER wear watches, rings or loose clothing while

installing or servicing opener. They could be caught in

garage door or opener mechanisms.

9. Install wall-mounted garage door control:

• within sight of the garage door

• out of reach of children at minimum height of 5 feet

• away from all moving parts of the door.

10. Place entrapment warning label on wall next to garage

door control.

11. Place manual release/safety reverse test label in plain

view on inside of garage door.

12. Upon completion of installation, test safety reversal

system. Door MUST reverse on contact with a one-

inch high object (or a 2x4 laid flat) on the floor.

To reduce the risk of severe injury or death:

WARNING

CAUTION WARNING

WARNING

To avoid possible SERIOUS INJURYto fingers from

moving garage door opener:

• ALWAYS keep hand clear of sprocket while operating

opener.

• Securely attach sprocket cover before operating.

WARNING

CAUTION WARNING

WARNING

Contents

Main GARAGE DOOR OPENER Model 1280LMC-R 1/2 HP Owners Manual Introduction Pages 2-5 Assembly Pages 6-7 TABLE OF CONTENTS Mechanical Electrical INTRODUCTION Safety Symbol and Signal Word Review Preparing your garage door Tools needed SECTIONAL DOOR INSTALLATION Planning ONE-PIECE DOOR WITH TRACK FINISHED CEILING Support bracket & fastening hardware is required. See page 13 ONE-PIECE DOOR WITHOUT TRACK Carton Inventory ASSEMBLY STEP 1 Attach the T-Rail to the Motor Unit ASSEMBLY STEP 2 Set the Belt Tension ASSEMBLY STEP 3 IMPORTANT INSTALLATION INSTRUCTIONS To reduce the risk of severe injury or death: INSTALLATION STEP 1 Determine the Header Bracket Location Page INSTALLATION STEP 2 Install the Header Bracket INSTALLATION STEP 3 Attach the T-Rail to the Header Bracket INSTALLATION STEP 4 Position the Opener INSTALLATION STEP 5 Hang the Opener INSTALLATIONSTEP 6 Install the Door Control INSTALLATION STEP 7 Install the Lights and Lenses INSTALLATION STEP 8 Attach the Emergency Release Rope and Handle INSTALLATIONSTEP 9 Electrical Requirements INSTALLATION STEP 10 Install The Protector System Page Page INSTALLATION STEP 11 Fasten the Door Bracket Page INSTALLATION STEP 12 Connect Door Arm to Trolley Page ADJUSTMENT STEP 1 Adjust the UP and DOWN Travel Limits ADJUSTMENT STEP 2 Adjust the Force ADJUSTMENT STEP 3 Test the Safety Reversal System ADJUSTMENT STEP 4 Test the Protector System OPERATION IMPORTANT SAFETY INSTRUCTIONS To reduce the risk of severe injury or death: SAVE THESE INSTRUCTIONS. Using Your Garage Door Opener To Open the Door Manually Using the Wall-Mounted Door Control Care of Your Opener Having a Problem? Having a Problem? (Continued) *3-Channel Remotes Security To Erase All Codes From Motor Unit Memory To Add an Additional Hand-held Remote Control PROGRAMMING To Add or Change a Keyless Entry PIN To change an existing, known PIN To set a temporary PIN REPAIR PARTS Page ACCESSORIES LIFTMASTER SERVICE IS ON CALL 1-800-654-4736 HOW TO ORDER REPAIR PARTS 1-800-654-4736 LIFTMASTER GARAGE DOOR OPENER FIVE-YEAR LIMITED WARRANTY Ouvre-porte de garage Modle 1280LMC-R 1/2HP Manual d'Instructions Page Page 4 POSE DE PORTE ARTICULE PORTE RIGIDE AVEC GUIDES Planification POSE DE PORTE RIGIDE SANS GUIDES 5 Inventaire des botes demballage FIXATIONS POUR LAPOSE MONTAGE - 1RE OPRATION Fixation du rail en T au moteur MONTAGE - 2E OPRATION Rglage de tension de la courroie MONTAGE - 3E OPRATION IMPORTANTES INSTRUCTIONS CONCERNANT LA POSE Pour rduire le risque de lsions graves ou mort: 8 POSE - 1RE OPRATION Passer la 2eopration, page 10. Dterminer l'emplacement du support de linteau PORTE ARTICULE ET PORTE RIGIDE MUNIES DE GUIDES Porte rigide avec guides horizontaux 9 PORTE RIGIDE SANS GUIDES Passer la 2eopration, page 10 Porte rigide sans guides basculant sur pivots Porte rigide sans guides et contrebalance par ressorts POSE - 2e OPRATION Pose du support de linteau 11 POSE - 3eOPRATION Fixation du rail sur le support de linteau 12 PORTE RIGIDE SANS GUIDES POSE - 4eOPRATION Positionnement de l'ouvre-porte PORTE ARTICULE OU PORTE RIGIDE AVEC GUIDES POSE - 5eOPRATION Accrochage de l'ouvre-porte 14 Figure 4 Figure 5 POSE - 6eOPRATION Pose de la commande de porte Figure 1 Figure 3 15 POSE - 7eOPRATION Pose des ampoules et des diffuseurs REMARQUE : POSE - 8eOPRATION Pose de la corde et de la poigne de dclenchement durgence POSE - 9eOPRATION Exigences lectriques 17 Faisant face la porte depuis l'intrieur du garage POSE - 10eOPRATION Pose du Systme Protector DTECTEUR INVERSEUR DE SCURIT 18 POSE DES SUPPORTS 19 Figure 5 Figure 4MONTAGE ET CBLAGE DES DTECTEURS INVERSEURS ALIGNEMENT DES DTECTEURS INVERSEURS DPANNAGE DES DTECTEURS INVERSEURS DE SCURIT POSE - 11eOPRATION Figure 2A Fixation du support de porte PORTES ARTICULES Figure 2B 21 PORTES RIGIDES POSE - 12E OPRATION Fixation de la biellette au chariot Page RGLAGES - 1re OPRATION Rglage des courses douverture et de fermeture RGLAGES - 2eOPRATION Rglage de la force RGLAGES - 3eOPRATION Essai du systme dinversion de scurit RGLAGES - 4eOPRATION Essayer le systme de protection FONCTIONNEMENT IMPORTANTES CONSIGNES DE SCURIT CONSERVER CES INSTRUCTIONS. Pour rduire le risque de blessures graves ou de mort : Utilisation de votre ouvre-porte de garage 28 Utilisation de la commande de porte montage mural PANNEAU COMMANDE DE PORTE 29 Entretien de louvre-porte de garage RGLAGES DECOURSE ET DE FORCE : PRIODICITS DENTRETIEN LA PILE DE LATLCOMMANDE Dfauts de fonctionnement Dfauts de fonctionnement (suite) 31 Pour ajouter une tlcommande main supplmentaire PROGRAMMATION *Tlcommandes 3 canaux Pour effacer tous les codes de la mmoire du moteur 32 Pour ajouter ou modifier un NIP dentre sans cl Pour modifier un NIP connu, existant Pour dfinir un NIP temporaire PICES DE RECHANGE Page ACCESSOIRES SERVICE LIFTMASTER VOTRE DISPOSITION 1-800-654-4736 COMMENT COMMANDER DES PICES DE RECHANGE 1-800-654-4736