CENTURION SYSTEMS SDO4 SMART Installation Manual page 21

SECTION 6
If, after securing the header
bracket, it is slightly out
(not level), use a hammer
to knock the tabs gently up
or down with a small spirit
level placed on top of them.
This will ensure a perfectly
level installation (Figure 18).
6.2.1.2. Mounting the SDO4 SMART to the header bracket
It is important at this point
of the installation to ensure
that the batteries are
connected before continuing
with the installation.
Position the SDO4 SMART in place,
with the open end of the drive rail
facing the floor, and the tensioning
bracket towards the garage door.
You will need a second person to
assist you with this.
If you are on your own,
use a ladder to support
the control unit end of the
SDO4 SMART while you
are positioning it for the
next step (Figure 19).
Align the holes on the side of the
tensioning bracket with the holes of
the header bracket.
OPERATOR INSTALLATION - SECTIONAL DOORS
Small spirit
level
Header
bracket
tabs
page 21
Hammer
Header
bracket
FIGURE 18
Tensioning bracket
Driver head unit
Face down
FIGURE 19
FIGURE 20
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