Chamberlain Whisper Drive SECURITY+ WD822K Series 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
Safety Reversing
must not exceed 1/4"
Sensor
ONE-PIECE DOOR WITH TRACK
Gap between floor and
bottom of door must
Safety not exceed 1/4"
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 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.
Wall-
mounted
Door
Control
Access
Door
Safety
Reversing Sensor Header
Wall
Header
Wall
Access
Door
Garage
Door
Safety
Reversing
Sensor
5
WARNING
CAUTION
AVERTISSEMENT
ATTENTION
Motor Unit
CLOSED POSITION
Belt
Pulley Bracket
Belt
Trolley
Header
Bracket
T-rail
Door
Bracket
Straight
Curved
Door
Door
Arm
Garage
Arm
Door
CLOSED POSITION
Belt
Trolley
Belt
Pulley Bracket
Curved
Header
Door Arm
Bracket
Door
Bracket Straight
Door
Arm
Emergency Release
Rope & Handle
Emergency
Release
Rope
& Handle
T-rail