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Internal system accessories
8.2.4 Mounting rail bracket
Plastic top / bottom parts in empty FWB / FWQ cabinets with D or D1 ending are supplied with a locknut as
a standard to ensure that mounting rails can be screwed on. Distribution boards with installed panels (e.g.
with S or N ending) do not come with a locknut. To screw on a locked panel, 4 locknuts per 250 mm panel
width have to be ordered. The ZZ41SF set contains 4 locknuts.
ZZ41SF locknut set
The 4.8 x 34.5 mm long screws required for this purpose are supplied with the individual mounting rails UN0xA
or are available in sets ZZ44SF (4 x) and ZZ40B (20 x).
ZZ40B locknut set
Panels can be screwed on with the ZZ44SF accessories set on request.
Set ZZ44SF contains 4 screws for FWB / FWQ, 4
screws for FWU and 4 locknuts
For the FWB / FWQ installation, four locknuts are first inserted in the intended duct in the plastic top / bottom
part. The 35 mm long screws then have to be inserted and screwed in through the univers mounting rails.
The 22 mm long screws in the accessories set are used only for fixing the flush distribution panels (FWU board).
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