Becker BOM 520 - Page 20

20
BOM 520/820 Operating Instructions
Fig. 6 - Mounting the wall fixing
To enable the door to run freely beneath the running
rail, the distance x must be greater than 20mm. Se-
lect distance x so that the angle of the connecting
rod does not exceed 45( (see Figure 11).
Transfer the highest point a of the door running track
- determined during installation preparation - plus
distance x, to the lintel.
Hold the wall fixing (10) at the full height (a + x) verti-
cally above the door connection bracket and mark
the fixing holes. Drill the holes for the dowels with a
10mm masonry drill and screw on the wall fixing.
6
a
X
a
X
10
10
7
13
8
7
8
1
17
10
9
Fig. 7 - Ceiling fixing for running rail
Fit the central mounting (13) on running rail (8) in
front of the joining piece (7) in the direction of the
wall bracket.
Fig. 8 - Ceiling fixing
Attention:
The drive must be secured against fall-
ing.
Position mounted drive at an incline to the door and
screw on with wall fixing (10). Align the drive so that
the running rail runs horizontally and parallel be-
tween the door running rails.