CENTURION SYSTEMS SDO4 SMART Installation Manual page 19

SECTION 6
6.2.1.1. Mounting the header bracket
The header bracket carries ALL of the opening and closing thrust of
the SDO4 SMART and, as such, must be securely fastened to a rigid,
structural member of the garage. It is entirely up to the installer to
determine the fixing method and the structural suitability of the fixing
points.
When marking important
lines needed for mounting
the header bracket, ensure
that a spirit level is used,
as it is imperative that
these lines are as level and
straight as possible.
Determine the highest arcing point
of the garage door and mark this as
a horizontal line on the header above
the top edge of the garage door.
Close the garage door, and
determine the garage door
center-line and mark a vertical line
on the header above the door.
OPERATOR INSTALLATION - SECTIONAL DOORS
Highest arcing point marked on header
Highest arcing
point
page 19
Header
Highest arcing point
Spirit level
Garage door
FIGURE 13
Garage door centre line
Garage door
FIGURE 14
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