__________________________________________________________________________________________________________________________________
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880
www.e2s.com Fax: +44 (0)208 740 4200
Document No. D157-00-201 Issue 3 25-06-20 Sheet 2 of 4
(2)
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.
4.3) Maintenance, Repair and Overhaul
Maintenance, repair and overhaul of the equipment should
only be carried out by suitable qualified personnel in
accordance with the current relevant standards:
EN60079-19 / IEC60079-19 : Explosive atmospheres -
Equipment repair, overhaul and reclamation
EN 60079-17/ IEC60079-17 : Explosive atmospheres -
Electrical installations inspection and maintenance
WARNING:
Do not open when energised.
Electrostatic charging hazard – clean only with a damp cloth.
Do not open when an explosive atmosphere may be present.
If opening the unit during maintenance operations, a clean
environment must be maintained, and any dust layer removed
prior to opening the unit.
For options on unit repairs or replacement parts, contact E2S
using the contact information in the footer of this installation
manual.
5)
Zones, Gas Group, Category and Temperature
Classification
The GNExL2 and GNExL1 sounders have been certified Ex db
IIC T4 , T3 and Ex db IIB T6 , T5 ,T4 dependant on ambient
temperature for full marking see section 2. This means that the
units can be installed in locations with the following conditions:-
Area Classification:
Zone 1
Explosive gas air mixture likely to occur in
normal operation.
Zone 2
Explosive gas air mixture not likely to occur,
and if it does, it will only exist for a short time.
Gas Groupings:
Group IIA
Propane
Group IIB
Ethylene
Group IIC
Hydrogen and Acetylene
Equipment Category:
2G
Temperature Classification:
T1
450
o
C
T2
300
o
C
T3
200
o
C
T4
135
o
C
T5
100
o
C
T6
85
o
C
Ambient Temperature Range:
GNExL1 - For range see Marking Codes Section 2
GNExL2 - For range see Marking Codes Section 2
6)
Loudspeaker Location and Mounting
The location of the loudspeakers should be made with due
regard to the area over which the unit must be audible. The
loudspeakers should only be fixed to services that can carry
the weight of the unit.
The loudspeakers should be securely bolted to a suitable
surface using the 7mm diameter boltholes in the stainless steel
U shaped mounting bracket (see figure 1). The angle can then
be adjusted in the direction that the sound is primarily required
to cover. This can be achieved by loosening the two large
bracket screws in the side of the unit, which allow adjustment
in steps of 18
°
. 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.
7)
Safety Warning (Electrostatic Hazard)
The acoustic horn section is made of ABS Plastic, therefore to
avoid a possible ELECTROSTACTIC CHARGE the unit must
only be cleaned with a damp cloth.
8)
Access to the Flameproof Enclosure
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.
Figure 1
Flameproof
Chamber
Flameproof
Cover
S/S Mounting
Bracket
Plastic Acoustic Horn
Please see Safety Warning
in Section 7 of this manual