User Manual

4
3. FLAMEPROOF CERTIFICATION
CAUTION
The BR323 removable electronic
assembly, which is common to both
models, may only be installed in a
hazardous area when mounted within a
flameproof BR323AL aluminium or
BR323SS stainless steel enclosure.
3.1 ATEX certificate
Notified Body ISSeP has issued the instruments
with an EC-Type Examination Certificate
ISSeP08ATEX035X that confirms compliance with
the European ATEX Directive 2014/34/EU for
Group II surface industries, Category 2GD
flammable gas and combustible dust atmospheres,
Ex d IIC T6. Copies of the certificate may be
downloaded from www.beka.co.uk. The
instruments bear the Community Mark and, subject
to local codes of practice, may be installed in any
of the European Economic Area (EEA) member
countries. ATEX certificates are also acceptable
for installations in the UK until 1st January 2025.
3.2 Flammable Gases
Zones, gas groups and T rating
Group II, Category 2G, Ex d IIC T6 certification
allows the BR323AL and BR323SS indicators to be
installed in:
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
will only exist for a short time.
Be used with gases in groups:
Group A propane
Group B ethylene
Group C hydrogen
Having a temperature classification of:
T1 450
o
C
T2 300
o
C
T3 200
o
C
T4 135
o
C
T5 100
o
C
T6 85
o
C
At ambient temperatures between –20 and +60
o
C.
This allows both models to be installed in most
hazardous areas and to be used with most
common industrial gases.
This manual describes installations in flammable
gas atmospheres which conform with
EN60079:Part14 Electrical Installation in
Hazardous Areas. When designing systems for
installation outside the UK, the local Code of
Practice should be consulted.
3.3 Combustible Dusts
Both the BR323AL and BR323SS enclosures have
been ATEX certified as Group II, Category 2D
apparatus with a Maximum Surface Temperature of
85
o
C. When installed as specified by EN 61241-14
‘Selection and installation of electrical apparatus for
use in the presence of combustible dust’, the
indicator may be installed in:
Zone 21 where explosive atmosphere in
the form of a cloud of
combustible dust in air is likely
to occur occasionally in normal
operation.
Zone 22 where explosive atmosphere in
the form of a cloud of
combustible dust in air is not
likely to occur in normal
operation, but if it does occur,
will only persist for a short
period.
Be used with dusts having a Minimum Ignition
Temperature of:
Dust cloud 127
o
C
Dust layer on BR323AL 160
o
C
or BR323SS up to
5mm thick.
Dust layer on BR323AL Refer to
or BR323SS overEN61241-14
5mm thick.
At an ambient temperature between -20 and +60
o
C
NOTE
Special Conditions for Safe Use
The ATEX certificate specifies that any
accumulation of dust on the enclosure
shall be avoided.