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Step 2: Check your distances and determine the position of the first bracket
First, you need to determine the distance between the garden door’s pivot point and the
pivot point of the garden door-closer and then the horizontale position. For that, you
already need the first (longer) bracket of the GTS 120/170.
Distance A and Distance B
taken together should
not exceed 155 mm
, but should
not be much less
. If the sum is >= 155 mm, the door can only be opened
less than
90°
at worst.
TIP: We therefore recommend
positioning the long bracket, which is mounted at the
garden door’s pivot point, in such a fashion that the
sum oft the two distances (A+B)
does not exceed
155mm
to the
outer hole
of the bracket.
Step 3: Calibrating the bracket on it’s abutment face
Now the height of the bracket mounted on the garden door’s pivot point is determined.
To this end, position the spirit level in such a way that the second bracket can be
installed on the garden door
without any problems while still being horizontal.
Mark the drill holes using a pen.