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Door control
Shaft bracket
13
Warning!
To avoid personal injury, it is essential
to secure the cable drum, the set
of springs and the centre supports
on the shaft.
The cable drum, set of springs and
centre support on the shaft could
slip off.
7.1.1 Spring
The cable drums and
springs must be
mounted on the right
side of the door so that
the cables can be
wound properly. The
cable drums are
MT10051002-GB /10-09-27
GB
RESIDENTIAL SECTIONAL GARAGE DOORS
INSTALLATION, USE & MAINTENANCE MANUAL
DOORS AND AUTOMATION SYSTEMS
PRN-120 model only
Drum (L) black right
Drum (L) red lef
t
Left spring
color black
Right spring
color red
Spring set left side
Spring set right side
marked with colors.
Inside mount, left:
cable drum (L)
red.
Interior installation,
right: cable
drum (R) black.
7.1.2 Installation of the spring
Match the center of support shaft
with the center of the width of the
door.
