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INSTRUCTION MANUAL
GNExS1
Alarm Horn Sounder with relay / telephone initiate
For use in Flammable Gas Atmospheres
5) Special Conditions for Safe Use
Repair of the Flame Path is not permitted.
Figure 1: Flame Path.
The enclosure is non-conducting and under certain extreme
conditions may generate an ignition capable level of
electrostatic charge. The user shall ensure that the equipment
is not installed in a location where it may be subjected to
extreme conditions (such as high-pressure steam) which might
cause a build-up of electrostatic charge on non-conducting
surfaces.
6) Product Mounting and Access
6.1 Location and Mounting
The sounder should be secured to any flat surface using the
three 7mm fixing holes (see figure 2). The angle can then be
adjusted as required but the mounting restrictions must be
observed (see outline drawings for details, D157-05-001 for
GNExS1F and D157-05-051 for GNExS1R). This can be
achieved by loosening the two large bracket screws in the side
of the unit, which allow adjustments in steps of 18°.
Figure 2: Fixing Location for GNEx[S1R/S1F] Sounder.
On completion of the installation the two large bracket
adjustment screws on the side of the unit must be fully
tightened to ensure that the unit cannot move in service.
The enclosure provides IP66 protection and is suitable for
installation in exterior locations providing it is positioned so that
water cannot collect in the horn, and the cable entry is sealed.
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
Document No. D157-00-681-IS
Issue 1
27-04-2023
6.2 Access to the Flameproof Enclosure
Warning – Hot surfaces. External
surfaces and internal components
may be hot after operation, take
care when handling the equipment.
In order to connect the electrical supply cables to the sounder
it is necessary to remove the flameproof cover to gain access
to the flameproof chamber. To achieve by loosening the M3
Grub Screw within the flameproof cover, and then unscrew
the flameproof cover, taking extreme care not to damage the
flameproof joints in the process (see figure 3).
Figure 3: Accessing the Explosion Proof Enclosure.
On completion of the cable wiring installation the flameproof
joints should be inspected to ensure that they are clean and
that they have not been damaged during installation.
Ensure that the 'O' ring seal is in place and undamaged.
When fitting the flameproof cover ensure the thread is
engaged correctly. Fully tighten the cover all the way, ensure
no gap is visible between the cover and base of the sounder
enclosure. Tighten the M3 grub screw.
7) Installation Requirements
7.1 Installation Standards Compliance
Warning – High voltage may be
present, risk of electric shock.
DO NOT open when energised,
disconnect power before opening.
The sounder must only be installed by suitably qualified
personnel in accordance with the latest issues of the relevant
standards:
EN60079-14:2008 / IEC60079-14:2007 (Ed4): Electrical
Installations in Hazardous Areas (other than mines).
EN60079-10-1:2009
Classification of Areas, Gas Atmosphere
The installation of the units must also be in accordance with
any local codes that may apply and should only be carried out
by a competent electrical engineer who has the necessary
training.
www.e2s.com
/
IEC60079-10:2008
Tel: +44 (0)208 743 8880
Sheet 3 of 6
(Ed1):
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