Craftsman 139.53939D Manual Del Propietário página 15

INSTALLATION STEP 4
Positionthe Opener
Follow instructions which apply to your door type as illustrated.
SECTIONAL DOOROR ONE-PIECE DOORWITH TRACK
A 2x4 laid flat is convenient for setting an ideal door-to-rail
distance.
1. Raisethe opener onto a stepladder. You will need help at this
point if the ladder is not tall enough.
2. Open the door all the way and place a 2x4 laid flat on the top
section beneath the rail.
3. If the top section or panel hits the trolley when you raise
the door, pull down on the trolley release arm 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.
Trolley
lease
ENGAGED RELEASED _
To prevent damageto garage door, rest garage door opener rail
on 2x4 placed on top section of door.
Rail
Door 2x4 is used to
from ceiling.
ONE-PIECEDOORWITHOUTTRACK
A 2x4 on its side is convenient for setting an ideal door-to-rail
distance.
1. Raisethe opener onto a stepladder. You will need help at this
point if the ladder is not tall enough.
2. Open the door all the way and place a 2x4 on its side on the top
section of the door beneaththe rail.
3. 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.
Header
I
i
Top of Door
2x4 is used to
determine the correct
mounting height
from ceiling.
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