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Chamberlain 1000SDC-R, 2000SDC-R, 2000SDC-R, 1000SDC-R owner manual CAUTION

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Installation Step 5

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.
SECTIONAL Door or
ONE-PIECE Door with Track
A 2x4 laid flat is convenient for setting an ideal door-
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 all the way and place a 2x4 laid flat on
the top section beneath the rail.
If the top panel hits the trolley when you raise the door,
pull down on the trolley release arm to disconnect the
inner and outer sections. The trolley can remain
disconnected until Step 12 is completed.
Rail 2x4
Door Foam
Packaging
ONE-PIECE Door without Track
• With the door fully open and parallel to the floor,
measure the distance from the floor to the top of the
door.
• Using a stepladder as a support, raise the opener to the
same distance as the door from the floor (it will be at a
slight angle as shown).
• The top of the door should be level with the top of the
opener. Do not position the opener more than 3" above
this point.
Top of Opener
Header
Bracket
Top of Door
Foam
Packaging
15
CAUTION
Trolley
Trolley
Release Arm

Contents
Main For Residential Use Only Garage Door Opener Owners Manual Contents Start by reviewing these important safety alert symbols: Mechanical Electrical WARNING CAUTIONCAUTION Safety Information and Precautions Hardware Supplied Carton Inventory SECTIONAL Door or ONE-PIECE Door with Track Installation FINISHED CEILING Support bracket & fastening hardware is required. See page 16. ONE-PIECE Door Without Track Installation ASSEMBLY STEP 1 Fasten the Rail To the Power Unit ASSEMBLY STEP 2 Install the Trolley Assembly Section: Pages 6 - 7 IMPORTANT INSTALLATION INSTRUCTIONS To reduce the risk of severe injury or death to persons: WARNING WARNING Proceed to Step 2, page 10. ONE PIECE Door with Track Installation Section: Pages 8 23 Installation Step 1 Determine Header Bracket Location Proceed to Step 2, page 10. ONE-PIECE Door Without Track Read the Safety Instructions on page 8. They also apply to doors without tracks. Fastening the Header Bracket to the Wall Fastening the Header Bracket to the Ceiling Installation Step 2 Install the Header Bracket Installation Step 3 Attach the Rail to the Header Bracket The Protector System Installation Step 4 Install the Safety Reversing Sensor (Receiving and Sending Eyes) Figure 3 Installation Step 4 Install the Safety Reversing Sensor B Figure 5 A CAUTION Installation Step 6 Hang the Opener Installation Step 7 Install the Door Control and Connect all Wiring Figure 3 WARNINGWARNING Figure 4 Figure 1 Figure 2 Installation Step 8 Electrical Requirements Installation Step 9 Complete Safety Reversing Sensor Installation Installation Step 10 Install the Lights and Lens Installation Step 11 Attach the Manual Release Rope and Handle Installation Step 12 Fasten Door Bracket SECTIONAL Door Installation Procedure All ONE-PIECE Door Installation Procedure Hardware Shown Actual Size Installation Step 13 Connect Door Arm to Trolley All ONE-PIECE Doors Adjustment Procedures for One-Piece Doors Adjustment Step 1 Adjust the UP and DOWN Limits How and When to Adjust the Limits Adjustment Section: Pages 24 26 Adjustment Step 2 Adjust the Force How and When to Adjust the Forces Adjustment Step 4 Test the Safety Reverse System Adjustment Step 3 Test The Protector System Care of Your Opener IMPORTANT SAFETY INSTRUCTIONS To reduce the risk of severe injury or death to persons: Maintenance Schedule SAVE THESE INSTRUCTIONS WARNING WARNING only Operation of Your Opener Operation of the Door Controls: Page Having a Problem? Situation Probable Cause & Solution Having a Problem? (continued) Situation Probable Cause & Solution Page Repair Parts Accessories Available For Your Opener To Add the Keyless Entry Index LIFT-MASTER SERVICE IS ON CALL 1-800-654-4736 HOW TO ORDER REPAIR PARTS 1-800-654-4736 LIFT-MASTER GARAGE DOOR OPENER ONE-YEAR LIMITED WARRANTY