Chamberlain WHISPER DRIVE WD912K - Manual (Page 5)

Access
Door
Gap between floor and
bottom of door must
not exceed 1/4"
Safety
Reversing Sensor
Safety
Reversing
Sensor
CLOSED POSITION
Header
Bracket
Belt
Pulley Bracket
Door
Bracket
Straight
Door
Arm
Curved
Door Arm
Trolley
Emergency Release
Rope & Handle
Rail
Garage
Door
Belt
Header
Wall
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).
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 17.
Safety Reversing
Sensor
Header
Wall
Safety
Reversing Sensor
Gap between floor
and bottom of door
must not exceed 1/4"
Access
Door
Wall-
mounted
Door
Control
Belt
Pulley Bracket
Header
Bracket
Trolley
Straight
Door
Arm
Emergency
Release
Rope
& Handle
Door
Bracket
Curved
Door
Arm
Header
Wall
Rail
Garage
Door
Belt
CLOSED POSITION
Motor Unit
ONE-PIECE DOOR WITHOUT TRACK
ONE-PIECE DOOR WITH TRACK
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.
WARNING
CAUTION WARNING
WARNING