Planning - Craftsman 139.54990 Manual Del Propietário

Planning

Identify the type and height of your garage door. Survey your
garage area to see if any of the conditions below apply to your
installation. Additional materials may be required. You may find it
helpful to refer back to this page and the accompanying
illustrations as you proceed with the installation of your opener.
Depending on your requirements, there are several installation
steps which may call for materials or hardware not included in the
carton.
Installation Step 1 – Look at the wall or ceiling above the
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garage door. The header bracket must be securely fastened to
structural supports.
Installation Step 5 – Do you have a finished ceiling in your
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garage? If so, a support bracket and additional fastening
hardware may be required.
Installation Step 12 – Depending upon garage construction,
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extension brackets or wood blocks may be needed to install
sensors.
Installation Step 12 – Alternate floor mounting of the safety
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reversing sensor will require hardware not provided.
SECTIONAL DOOR INSTALLATION
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with
glass panels, etc.). See page 18 for details.
Vertical Centerline
of Garage Door
Gap between floor and
bottom of the door must not
exceed 1/4" (6 mm).
Safety Reversing Sensor
Header Wall
Torsion Spring
Safety Reversing Sensor
Do you have an access door in addition to the garage door? If
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not, Model 139.53702 Emergency Key Release is required. See
Accessories page.
Look at the garage door where it meets the floor. Any gap
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between the floor and the bottom of the door must not exceed
1/4" (6 mm). Otherwise, the safety reversal system may not
work properly. See Adjustment Step 2. Floor or door should be
repaired.
SECTIONAL DOOR INSTALLATION
Do you have a steel, aluminum, fiberglass or glass panel door?
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If so, horizontal and vertical reinforcement is required
(Installation Step 8).
The opener should be installed above the center of the door. If
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there is a torsion spring or center bearing plate in the way of
the header bracket, it may be installed within 4 feet (1.22 m) to
the left or right of the door center. See Installation Steps 1
and 8.
If your door is more than 7 feet (2.13 m) high, see rail
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extension kits listed on Accessories page.
Slack in chain tension is
normal when garage door
is closed.
Extension Spring
OR
Wall-mounted
Door Control
Access Door
4
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 16.
Motor Unit
Header
Bracket
Trolley
Rail Tab
Garage Door
Spring
Straight
Door
Arm
Header
Curved
Wall
Door Door Arm
Bracket
Garage
Door
CLOSED POSITION
Chain
Emergency
Release
Rope & Handle