European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: +44 (0)208 743 8880
Document No. D210-00-031-IS
Issue 5
12-09-2022
Sheet 3 of 6
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5. Special Conditions for Safe Use
Repair of the flamepath / flameproof joints is not permitted.
The enclosure is non-conducting and may generate an
ignition-capable level of electrostatic charges under certain
extreme conditions (such as high-pressure steam). The user
should ensure that the equipment is not installed in a location
where it may be subjected to external conditions that might
cause a build-up of electrostatic charges on non-conducting
surfaces.
Additionally, cleaning of the equipment should be done only
with a damp cloth.
6. Product Mounting and Access
The location of the sounder should be made with due regard
to the area over which the warning signal must be visible. They
should only be fixed to services that can carry the weight of the
unit.
The BEx sounder should be secured to any flat surface using
at least two of the three 7mm fixing holes on the stainless steel
U shaped mounting bracket. See Figure 1. The required angle
can be achieved by loosening the two large bracket screws in
the side of the unit, which allow adjustment of the sounder in
steps of 18°. On completion of the installation then two large
bracket adjustment screws on the side of the unit must be fully
tightened to ensure that the unit cannot move in service.
Fig. 1a Fixing Location for Sounder Flare
Fig. 1b Fixing Location for Sounder Radial
7. Access to the Flameproof Enclosure
To access the Ex d chamber, remove the four M6 hexagon
socket head screws and withdraw the flameproof cover taking
extreme care not to damage the flameproof joints in the
process. M6 cover screws are Class A4-80 stainless steel and
only screws of this category can be used for the enclosure.
Fig. 2 Accessing the Explosion proof Enclosure.
On completion of the installation, the flameproof joints should
be inspected to ensure that they are clean and that they have
not been damaged during installation.
Check that the earth bonding wire between the two castings is
secure and the ‘O’ ring seal is in place. When replacing the
flameproof cover casting ensure that it is square with the
flameproof chamber casting before inserting. Carefully push
the cover in place allowing time for the air to be expelled. Only
after the cover is fully in place should the four M6 Stainless
Steel A4-80 cover bolts and their spring washer be inserted
and tightened down. If the cover jams while it is being inserted,
carefully remove it and try again. Never use the cover bolts to
force the cover into position.
Warning – High voltage may be present,
risk of electric shock. DO NOT open when
energised, disconnect power before
opening.
Warning – Hot surfaces. External surfaces
and internal components may be hot after
operation, take care when handling the
equipment.
(Appropriate cable glands
to be customer supplied)
Flameproof cover
M6 Cover
Screws
M6 Spring
Washer
