Planning - Chamberlain POWER DRIVE 248735S 3/4 HP Owner's Manual

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
Safety
Reversing Sensor
ONE-PIECE DOOR WITH TRACK
Gap between fl oor and
bottom of door must
Safety Reversing
not exceed 1/4" (6 mm).
Sensor
Gap between fl oor and
bottom of door must not exceed 1/4" (6 mm).
Safety
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 fl oor MUST NOT exceed 1/4" (6 mm).
Otherwise, the safety reversal system may NOT
work properly.
• The fl oor or the garage door MUST be repaired to
eliminate the gap.
FINISHED CEILING
Support bracket & fastening
hardware is required.
See page 15.
Rail
Slack in chain tension
is normal when garage
door is closed.
Wall-mounted
Door Control
Access
Door
Safety
Reversing Sensor
Header
Wall
Header
Wall
5
Motor Unit
Trolley
Stop Bolt
Cable
Header
Bracket
Rail
Door Bracket
Straight Door
Arm
Garage Door
CLOSED POSITION
Trolley
Cable
Stop Bolt
Curved
Header
Door Arm
Bracket
Door
Bracket Straight Door
Arm
Garage
Door
CLOSED POSITION
Trolley
Emergency
Release
Rope &
Curved
Handle
Door
Arm
Chain
Rail
Emergency
Release
Rope &
Handle