Chamberlain 9950D - Manual (Page 5)

5
Access
Door
Safety
Reversing Sensor
Safety
Reversing
Sensor
Header
Bracket
Door
Bracket
Straight
Door
Arm
Curved
Door Arm
Trolley
Emergency Release
Rope & Handle
Rail Assembly
Garage
Door
Header
Wall Rail
Bracket
CLOSED POSITION
Gap between floor
and bottom of door
must not exceed 1/4" (6 mm).
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 12.
• Depending on your door’s construction, you may
need additional mounting hardware for the door
bracket (Step 12).
Safety Reversing Sensor
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 19.
Safety Reversing
Sensor
Header Wall
Access
Door
Gap between floor
and bottom of door must not exceed 1/4" (6 mm).
Motor unit
Wall-mounted
Door Control
Rail
ONE-PIECE DOOR WITHOUT TRACK
CLOSED POSITION
Header Bracket
Trolley
Straight
Door
Arm
Emergency Release
Rope and Handle
Door Bracket
Curved
Door Arm
Header
Wall
Rail Assembly
Garage
Door
Rail Bracket
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" (6 mm). 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