Chamberlain 7200 - Position the Opener

Installation
Step
4
Position
the Opener
Follow
instructions
which
apply
to
your
door
type
as
illustrated
A
CAUTION
To
prevent
damage
to
steel,
aluminum,
fiberglass
or
glass
panel
doors,
do not
rest
the
opener
on the
door
without using
a
2x4.
A
2x4laid
flat
is convenient
for setting
an ideal
door-to-T-rai
I distance.
.
Raise
the
opener
onto a
stepladder.
You
witl need
help
at this
point
if the
ladder
is
not tall
enough.
.
Open
the
door
all the
way
and
place
a 2x4laid
llat
on
the
top section
beneath
the
T-rail.
tf the
top
panel
hits
the
trolley
when
you
raíse
the
door,
pull
down
on
the trolley
release
arm
to
disconnect
the
inner
and
outer
sections.
The
trottey
can
remain
disconnected
until
Step
12
is
completed.
Trolley
Release
Arm
Trolley
T-rail 2x4 Laid
Flat
Header
Bracket
Top of
Opener
.
With
the door
fully
open
and
parallel
to the
floor,
measure
the
distance
from
the floor
to
the top
of
the
door.
.
Using
a
stepladder
as
a support,
raise
the
opener
to
the same
distance
as
the
door
from
the
floor
(it
will be
at a
slight
angle
as
shown).
.
The top
of
the door
should
be level
with
the
top of
the opener.
Do
not
position
tlre opener
more
than
2"
above
this
point.
Top of
Door
16
Stepladder
Nortek, Exhibit 1012