Automatic Technology Australia Securalift GDO 2v4 - Page 7

STEP
4
Remove
locating screwdriver from trolley.
Disengage trolley
from
chain
index by
swinging
lever downwards
(Fig.
4),
then slide
trolley
away from chain
index along
pipe
track.
Loosen locking
nuts on chain index screws.
To
tighten chain,
turn chain
index in
anti-clockwise
direction,
looking from supporl
pipe
assembly
to drive
unit. Do not overtighten
chain as it
has to sag 6-
12mm.
Checking
before
locking screw
with
locking nuts that chain
is
not
twisted.
When tension
is finalised tighten
lock nut at
both ends
of chain.
FIG.4
PROCEED FROM STEP
5
PROCEED FROM STEP 5
SECTIONAL
DOOR WITH
TRACK
E DOOR WITH
ONE
PIECE
DOU;
WITHOUT TRACK
TRACK
STEP
4
Open the door and
find the highest
point
of
travel of the top door
panel.
Using
a level,
transfer this
height to the wall above the
tloor
(Fig.
5) and
mark a line 60mm above
it.
Determine the centre
of the location on the
wall above
and on top of the
door. Then draw
two
(2)
lines
21.5mm on each side of the
door centre.
(Fig.
6).
LEVEL
\
EV
FIG.5