Isotra HRS-ZIP, Technical Manual

Page: 49 / 154

SCREEN BLINDS
49
Step 5: Checking the assembly
Always make sure the roller blind is properly installed:
1. First, check horizontality of the box.
2. Check whether both guide rails are parallel to one
another and, at the same time, perpendicular to the
box.
3. Measure and compare the diagonals accurate to milli-
metres.
If the box and guide rails are not installed correctly, the
bottom slat will wind into the box at an angle, causing the
fabric to crinkle.
Method 2. Placing the complete assembly of the box and guide rails in or above the window opening and securing by
bolts (used where there is insufficient space for sliding the guide rails on the side piece pin, for example due to the presen-
ce of a window sill).
Step 1: Drilling the holes for the wall/ceiling holders
Box type X
110 73
Spirit level
Place the wall/ceiling holders to the assembly surface. Use
the upper holes for ceiling mounting, and the rear holes for
wall mounting.
The box must be perfectly horizontal, and therefore make
sure whether the wall/ceiling holders are properly aligned.
To do this, use a tube spirit level and a plumb line, or another
suitable tool.
The wall/ceiling holders must be installed 40–100 mm from
the box sides. Any additional holders are to be installed even-
ly distributed along the box width and they are intended to
prevent arching of wider boxes.