Chamberlain SECURITY+ CG40CDM Owner's Manual 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
Safety Reversing Sensor
ONE-PIECE DOOR WITH TRACK
Gap between fl oor and bottom of
door must not exceed 1/4" (6 mm).
Safety Reversing
Sensor
Header Wall
Safety Reversing Sensor
Gap between fl oor and bottom of
door must not exceed 1/4" (6 mm).
Access
Door
Safety 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 fl oor MUST NOT exceed 1/4" (6 mm).
Otherwise, the safety reversal system may NOT
work properly.
• The fl oor or the garage door MUST be repaired to
eliminate the gap.
FINISHED CEILING
Support bracket &
fastening hardware is
required. See page 15.
Rail
Slack in chain tension
is normal when garage
door is closed.
Wall-mounted
Door Control
Access
Door
Door Bracket
Header
Wall
Rail Tab
Header
Wall
Header
Bracket
Door
Bracket
Garage
Door
5
Motor Unit
CLOSED POSITION
Rail Tab
Cable
Header Bracket
Rail
Straight
Curved
Door Arm
Door Arm
Garage Door
CLOSED POSITION
Cable
Trolley
Curved
Door Arm
Straight
Door Arm
Trolley
Emergency
Release
Rope &
Handle
Chain
Chain
Rail
Emergency
Release
Rope &
Handle