Chamberlain 1200 - Manual (Page 5)

FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 17. Slack in chain tension
is normal when
garage door is closed.
Safety
Reversing
Sensor
Header
Wall
Access Door
Safety Reversing Sensor
Gap between floor and bottom of
door must not exceed 1/4".
5
Chain
Pulley Bracket
Header
Bracket
Trolley
Straight
Door
Arm
Manual
Release
Rope & Handle
Door
Bracket
Curved
Door
Arm
Header
Wall
T-rail
Garage
Door
Before you begin, survey your garage area to
see whether any of the conditions below
apply to your installation.
Based on your particular requirements, there are
several installation steps which might call for
materials and/or hardware not included in the carton.
• Step 1, page 12 - Look at the wall or ceiling above
the garage door. The header bracket must be
securely fastened to structural supports.
• Step 5, page 17 - Do you have a finished ceiling in
your garage? If so, a support bracket and additional
fastening hardware (not supplied) may be required
• Safety reversing sensor, page 21 - Depending on
garage construction, wood blocks may need to be
securely fastened to mounting locations before
sensors are installed.
• Step 10, page 22 - Alternate floor mounting of the
safety reversing sensor will require hardware that is
not provided.
• Step 11, page 25 - Generally, a one-piece door
does not require reinforcement. If your door is
lightweight, you can refer to the information relating
to sectional doors on page 24.
• Step 11, page 25 - Depending on your door's
construction, you might need additional mounting
hardware for the door bracket.
• Do you have an access door in addition to the
garage door? If not, Model 1702 Outside Quick
Release is required. See page 38.
• The gap between the bottom of the garage door and
the floor cannot exceed 1/4". Otherwise, the safety
reverse system may not work properly. See
page 30. The floor or the door should be repaired.
You may find it helpful to refer back to this page as
you proceed with the installation of your opener.
Header
Bracket
Chain
Pulley
Bracket
Door
Bracket
Straight
Door Arm
Curved
Door Arm
Trolley
Manual Release
Rope & Handle
Header
Wall
T-rail
Door
Chain
Access
Door
Floor must be level
across width of door
Slack in Chain Tension
is Normal When
Garage Door is Closed
Safety
Reversing
Sensor
Safety
Reversing
Sensor
One-Piece Door Installation
One-Piece Door without Track
Closed Position
Closed Position
One-Piece Door with Track