Chamberlain Security+ CG40CD 1/2 HP Manuel D'instructions page 5

Planning (Continued)
ONE-PIECE DOOR INSTALLATIONS
• Generally, a one-piece door does not require
reinforcement. If your door is lightweight, refer to
the information relating to sectional doors in
Installation Step 11.
• Depending on your door's construction, you may
need additional mounting hardware for the door
bracket (Step 11).
ONE-PIECE DOOR WITHOUT TRACK
Header Wall
Gap between floor
and bottom of door must not exceed 1/4" (6 mm).
Safety Reversing Sensor
ONE-PIECE DOOR WITH TRACK
Gap between floor
and bottom of door
Safety
must not exceed 1/4" (6 mm).
Reversing 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 or the garage door MUST be repaired to
Rail
Slack in chain tension
is normal when garage
door is closed.
Wall-mounted
Door Control
Access
Door
Safety Reversing
Sensor
Trolley Stop Bolt
Header
Access
Wall
Door
Safety
Reversing
Sensor
5
WARNING
the floor MUST NOT exceed 1/4" (6 mm). Otherwise,
WARNING
the safety reversal system may not work properly.
eliminate the gap.
WARNING
Motor Unit
CLOSED POSITION
Trolley Stop Bolt
Header
Bracket
Rail
Door Bracket
Straight
Door
Arm
Header
Wall
Garage Door
CLOSED POSITION
Cable
Curved
Header
Door Arm
Bracket
Door
Straight
Bracket
Door
Arm
Garage
Door
Trolley
Cable
Emergency
Release
Curved Rope & Handle
Door
Arm
Chain
Rail
Emergency
Release
Rope &
Handle