29
October 2010
AUTOMATIKPRODUKTER
AUTOMATIKPRODUKTER
ATEX – Duct Smoke Detector
Befesigungsbohrung Ø 6 mm
Einlassrohr
Spannbandöffnung
520
37
206
268
Ø
28-30/150 mm
15
0
0
0
Inlet tube
0
0
0
Opening for tensioning strap
Fastening hole ø 6 mm
In case the supplied self-cutting screws (4.8 x 22) are not suitable for fastening
the unit at the ventilation duct, appropriate fastening materials, such as ten-
sioning straps must be used. The LRS 04 Ex is equipped with three 6 mm holes
(see figure) and three pairs of openings for tensioning straps.
Two large openings for the inlet tube and - the outlet tube are cut into the
ventilation duct (see Fig. 9-03).
0
Fig. 9-03 Hole dimensions
Opening the cover the LRS 04 Ex
The LRS 04 Ex is equipped with quick fasteners for service purposes. These must
only be opened if an approval for working in hazardous areas has been granted.
Closing and opening of the clips can be facilitated by slightly pressing down the
housing cover by hand. In case of overhead assembly of the LRS 04 Ex it must
be ensured that no parts or elements (transparent cover, intake pipe, etc.) are
dropped on the floor when opening the transparent cover.
Handling
The inherently safe wiring with the ORS 221 Ex is executed in the factory and
must not be modified. The ex-protected dummy plugs must be left in the cable
glands.
After positive functional testing by means of test aerosol 918/5 the inlet tube
with the flow adapter can be inserted. The equipotential bonding connection
pre-installed at the inlet tube must also be left unchanged. Subsequently, the
cover of the ventilation-duct smoke switch system LRS 04 Ex can be re-installed
by slightly pressing it on and closing the clips.
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