Chamberlain 1346 - 1HP - Manual (Page 5)

5
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
Access
Door
Gap between floor and
bottom of door must not
exceed 1/4" (6 mm)
Safety
Reversing
Sensor
Safety
Reversing
Sensor
CLOSED POSITION
Header
Bracket
Chain
Pulley Bracket
Door
Bracket
Straight
Door
Arm
Curved
Door Arm
Trolley
Emergency Release
Rope & Handle
Rail
Garage
Door
Chain
Header
Wall
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 WITH TRACK
FINISHED CEILING
Support bracket
& fastening
hardware is required.
See page 17.
Slack in chain tension
is normal when
garage door is closed.
Header
Wall
Safety Reversing
Sensor
Safety Reversing
Sensor
Gap between floor
and bottom of door must
not exceed 1/4" (6 mm)
Access
Door
Wall-mounted
Door Control
Motor Unit
ONE-PIECE DOOR WITHOUT TRACK
Chain
Pulley Bracket
Header
Bracket
Trolley
Straight
Door
Arm
Emergency
Release
Rope
& Handle
Door
Bracket
Curved
Door
Arm
Header
Wall
Rail
Garage
Door
CLOSED POSITION