Craftsman 139.54930 Manual Del Propietário página 5

Planning (Continued)
ONE-PIECE DOOR INSTALLATIONS
Generally, a one-piece door does not require reinforcement. If
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your door is lightweight, refer to the information relating to
sectional doors in Installation Step 8.
Depending on your door's construction, you may need
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additional mounting hardware for the door bracket (Step 8).
Header W all
Gap between floor
and bottom of door must
Safety Reversing Sensor
not exceed 1/4" (6 mm).
Gap bet ween floor and bottom of door must
Safety Rever sing Sensor
not exceed 1/ 4" (6 m m).
Rail
Slack in chain tension
is normal when garage
door is closed.
Wall-mounted
Door Control
Access
Door
Safety Reversing
Sensor
Access
Header
Door
Wall
Safety Rever sing Sensor
Without a properly working safety reversal system, persons
(particularly small children) could be SERIOUSLY INJURED or
KILLED by a closing garage door.
The gap between the bottom of the garage door and the floor
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MUST NOT exceed 1/4" (6 mm). Otherwise, the safety reversal
system may NOT work properly.
The floor or the garage door MUST be repaired to eliminate
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the gap.
Motor Unit
CLOSED POSITION
Rail Tab
Cable
Header
Bracket
Rail
Door Bracket
Straight
Curved
Door
Door
Arm
Arm
Header
Wall
Garage Door
CLOSED POSITION
Rail Tab
Cable
Header
Rail
Bracke t
Curved
Straight Door
Door
Door Arm
Arm
Brack et
Garage
Door
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Emergency
Release
Rope & Handle
Chain