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.
Access
Door
Gap
b
et
w
een floor and
b
ottom of door m
u
st not
exceed 1/4" (6 mm)
Safety
Re
v
ersing
Sensor
Safety
Re
v
ersing
Sensor
CLOSED POSITION
Header
Bracket
Chain
P
u
lley Bracket
Door
Bracket
Straight
Door
Arm
C
u
r
v
ed
Door Arm
Trolley
Emergency Release
Rope & Handle
Rail
Garage
Door
Chain
Header
W
all
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
FI
N
ISHED CEILI
N
G
S
u
pport
b
racket
& fastening
hard
w
are is re
qu
ired.
See page 17.
Slack in chain tension
is normal
w
hen
garage door is closed.
Header
W
all
Safety Re
v
ersing
Sensor
Safety Re
v
ersing
Sensor
Gap
b
et
w
een floor
and
b
ottom of door m
u
st
not exceed 1/4" (6 mm)
Access
Door
W
all-mo
u
nted
Door Control
Motor Unit
ONE-PIECE DOOR WITHOUT TRACK
Chain
P
u
lley Bracket
Header
Bracket
Trolley
Straight
Door
Arm
Emergency
Release
Rope
& Handle
Door
Bracket
C
u
r
v
ed
Door
Arm
Header
W
all
Rail
Garage
Door
CLOSED POSITION