INSTRUCTION MANUAL (ATEX)
BExS120D and BExS110D
Flameproof Sounders
1)
Introduction
The BExS120D and BExS110D are second generation
flameproof sounders which are certified to the European
Standards EN 50014: 1992 and EN 50018: 1994 and meet
the requirements of the ATEX directive 94/9/EC. The
sounders produce loud warning signals and can be used in
hazardous areas where potentially flammable atmospheres
may be present. Thirty-two different first stage alarm sounds
can be selected by internal switches, and each one can be
externally changed to a second or third stage alarm sound
(
see tone table on Page 4
). The BExS120D unit produces
output levels in the 117dB(A) range and the BExS110D unit
produces output levels in the 110dB(A) range. Both sounders
can be used in Zone 1 and Zone 2 areas with gases in
groups IIA, IIB and IIC and temperature Classifications of T1,
T2, T3 and T4.
2)
Marking
All units have a rating label, which carries the following
important information:-
Unit Type No.
BExS120D or BExS110D
Input Voltage:
DC Units
12V or 24V or 48V
AC Units
230V or 110V or 115V
Code:
EEx d IIC T4 (T
amb
. –50 to +55
°
C)
Certificate No.
KEMA 99ATEX6312
Warnings:
DO NOT OPEN WHEN AN EXPLOSIVE
GAS ATMOSPHERE IS PRESENT
COVER BOLTS CLASS A4-80
USE HEAT RESISTING CABLES AND CABLE GLANDS
(Rated 95ºC) AT AMB. TEMPERATURES OVER 40ºC
Year of Construction /
Serial No.
i.e. 02 / 1S21000001
3)
Type Approval Standards
The sounders have an EC Type examination certificate
issued by KEMA and have been approved to the following
standards:-
EN 50014 : 1992 + prA1
General Requirements
EN 50018 : 1994 + prA1
Flameproof Enclosure ‘d’
4)
Installation Requirements
The sounders must be installed in accordance with the latest
issues
of
the
relevant
parts
of
the
BS
EN 60079
specifications
or
the
equivalent
IEC
specifications
–
Selection,
Installation
and
maintenance
of
electrical
apparatus for use in potentially explosive atmospheres (other
than mining applications or explosive processing and
manufacture):-
BS EN 60079-14 : 1997
Electrical Installations in Hazardous
Areas (other than mines)
BS EN 60079-10 : 1996
Classification of Hazardous Areas
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.
5)
Zones, Gas Group, Category and Temperature
Classification
The BExS120D and BExS110D sounders have been certified
EEx d IIC T4 (Tamb. –50 to +55ºC). 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
400
o
C
T2
300
o
C
T3
200
o
C
T4
135
o
C
Ambient Temperature Range:
-50
°
C to +55
°
C
6)
Sounder Location and Mounting
The location of the sounders should be made with due regard
to the area over which the warning signal must be audible.
The sounders should only be fixed to services that can carry
the weight of the unit.
The sounder should be securely bolted to a suitable surface
using the 7mm diameter boltholes in the stainless steel U
0344
II 2G
Epsilon x:
Gas Group and
Category:
CE Marking:
Notified Body No.