Planning - Chamberlain LiftMaster PROFESSIONAL ATS 211X 1/2 HP Mode D'emploi

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.
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.
Safety Reversing Sensor
Header Wall
Vertical
Centerline of
Garage Door
Gap between floor and bottom
of door must not exceed 1/4" (6 mm)
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 MUST NOT exceed 1/4". Otherwise, the safety
reversal system may not work properly.
• The floor or the garage door MUST be repaired to
eliminate the gap.
FINISHED CEILING
Support bracket &
fastening hardware
is required.
See page 11.
Slack in chain tension
is normal when
garage door is closed.
Extension Spring
OR
Torsion Spring
Access Door
Safety
Reversing
Sensor
Header
Bracket
Garage
Door
Spring
Header
Wall
Door Bracket
Garage
Door
4
WARNING
CAUTION
Wall-
mounted
Door
Control
CLOSED POSITION
Chain Pulley
Bracket
Rail
Trolley
Chain
Emergency
Release
Rope & Handle
Straight
Door
Arm
Curved
Door
Arm