Craftsman 139.53901DM1/2 HP Manual Del Propietário página 15

INSTALLATION STEP 4
Positionthe Opener
Follow instructions which apply to your door type as illustrated.
SECTIONAL DOOROR ONE-PIECEDOORWITH TRACK
A 2x4 laid flat is convenient for setting an ideal door-to-rail
distance.
• Removefoam packaging.
• 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 beneaththe rail.
• If the top section or panel hits the trolley when you raise the
door, pull down on the trolley releasearm to disconnect inner
and outer sections. Slide the outer trolley toward the motor
unit. The trolley can remain disconnected until Installation
Step 12 is completed.
To prevent damageto garage door, rest garage door opener
rail on 2x4 placed on top section of door.
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ENGAGED
ONE-PIECE DOORWITHOUTTRACK
A 2x4 on its side is convenient for setting an ideal door-to-rail
distance.
• Removefoam packaging.
• Raisethe 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 on its side on the
top section of the door beneath the rail.
• The top of the door should be level with the top of the motor
unit. Do not position the opener more than 4" (10 cm) above
this point.
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