Chamberlain WD832KD 1/2 HP 用户手册

5

Access
Door

Safety
Reversing Sensor

Safety
Reversing
Sensor

Gap between floor 
and bottom of door
must not exceed 1/4" (6 mm).

Garage
Door

Header
Wall

Header
Bracket

Door
Bracket

Straight
Door
Arm

Curved
Door Arm

Trolley

Emergency 
Release
Rope & 
Handle

Rail

Belt

Trolley Stop Bolt

• 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).

Safety Reversing Sensor

Access
Door

FINISHED CEILING

Support bracket
& fastening
hardware is required.
See page 16.

Safety Reversing 
Sensor

Header Wall

Gap between floor 
and bottom of door must not exceed 1/4" (6 mm).

Wall-mounted
Door Control

Rail

Motor Unit

Header
Wall

Header
Bracket

Trolley

Straight
Door
Arm

Emergency
Release
Rope & Handle

Door Bracket

Curved
Door
Arm

Garage
Door

Trolley Stop Bolt

Belt

Rail

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.