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.
• 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 laid flat on the top
section beneath the rail.
• 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
L__..,._,_,_ _ Release Arm --
tl
ENGAGED RELEASED
To prevent damageto garage door, rest garage door opener rail
on 2x4 placed on top section of door.
J
Rail _l:
_11_1 Door 2x4 is used to determine
lhecorr_tgmOU nting height
ONE-PIECEDOORWITHOUTTRACK
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 beneaththe 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.
Header ii_
2x4 is used to determine
the correct mounting height
from ceiling.
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