Chamberlain Whisper Drive Security+ WD822KCD 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
Header Wall
Gap between floor
and bottom of door must not exceed 1/4" (6 mm).
Safety Reversing Sensor
ONE-PIECE DOOR WITH TRACK
Safety
Reversing Sensor
Rail
Access
Door
Safety Reversing
Sensor
Access
Door
Safety
Reversing
Gap between floor
Sensor
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" (6 mm). Otherwise, the safety
reversal system may not work properly.
• The floor or the garage door MUST be repaired to eliminate
the gap.
Motor Unit
Wall-mounted
Door Control
Door Bracket
Header
Wall
CLOSED POSITION
Trolley Stop Bolt
Header
Header
Bracket
Wall
Door
Bracket
Garage
Door
5
WARNING
WARNING
WARNING
CLOSED POSITION
Trolley Stop Bolt
Belt Trolley
Header
Rail
Bracket
Curved
Straight
Door
Door
Arm
Arm
Garage
Door
Belt Trolley
Curved
Door Arm
Rail
Emergency
Release
Straight
Rope &
Door
Handle
Arm
Emergency
Release
Rope & Handle