![background image](http://html1.mh-extra.com/html/chamberlain/2575c/2575c_owners-manual_2586929004.webp)
FINI
SHED
CE
I
L
ING
Support
bracket
& f
astenin
g
hardware
is
re
q
uired
.
See
pa
g
e
12
.
Slack
in
chain
tension
is
normal
when
g
ara
g
e
door
is
closed
.
Sa
f
et
y
R
eversin
g
Sensor
Header
Wall
Access
Door
Sa
f
et
y
R
eversin
g
Sensor
G
ap
between
f
loor
and
bottom
o
f
door
must
not
e
x
ceed
1/
4
"
(6
mm)
Wall
-
mounted
Door
Control
Motor
U
nit
ONE-PIECE DOOR WITHOUT TRACK
4
Planning
Identify the type and height of your garage door. Survey your garage area to see if any of the conditions below
apply to your installation. Additional materials may be required. You may find it helpful to refer back to this page
and the accompanying illustrations as you proceed with the installation of your opener.
Access
Door
Sa
f
et
y
R
eversin
g
Sensor
Sa
f
et
y R
eversin
g
Sensor
Slack
in
chain
tension
is
normal
when
g
ara
g
e
door
is
closed
.
G
ap
between
f
loor
and
bottom
o
f
door
must
not
e
x
ceed
1/
4
"
(6
mm)
.
ONE-PIECE DOOR WITH TRACK
Safety Reversing Sensor
Support bracket &
fastening hardware
is required.
See page 12.
— — — — — — — —
Header Wall
FINISHED CEILING
Torsion
Spring
Extension
Spring
OR
Safety
Reversing
Sensor
Gap between floor
and bottom of door
must not exceed 1/4" (6 mm)
Access
Door
Wall-
mounted
Door
Control
Horizontal and vertical reinforcement
is needed for lightweight garage doors
(fiberglass, steel, aluminum, door with
glass panels, etc.). See page 19 for details.
Motor Unit
OR
One-Piece Door-Extension Spring
Header Wall
Door
Track
Slack in chain tension
is normal when
garage door is closed.
Vertical
Centerline
of Garage Door
SECTIONAL DOOR INSTALLATION