3) Type Approval Standards
The combined sounder beacon carries an EC Type
Examination Certificate and IECEx Certificate of Conformity,
and have been certified to comply with the following
standards:
EN60079-0:2012+A11:2013 / IEC60079-0:2011 (Ed 6):
Explosive Atmospheres - Equipment. General requirements
EN60079-1:2007 / IEC60079-1:2007 (Ed 6):
Explosive Atmospheres - Equipment protection by flameproof
enclosures "d"
EN 60079-31:2014 / IEC60079-31:2013 (Ed 2):
Explosive Atmospheres - Equipment dust ignition protection
by enclosure "t"
4) Installation
Requirements
The combined sounder beacon must only be installed by
suitably qualified personnel in accordance with the latest
issues of the relevant standards:
EN60079-14 / IEC60079-14: Explosive atmospheres -
Electrical installations design, selection and erection
EN60079-10-1 / IEC60079-10-1: Explosive atmospheres -
Classification of areas. Explosive gas atmospheres
EN60079-10-2 / IEC60079-10-2: Explosive atmospheres –
Classification of areas. Explosive dust atmospheres
The installation of the combined sounder beacon 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) Special Conditions of 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) Location and Mounting
The location of the combined sounder beacon 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 combined sounder beacon should be secured to
any flat surface using 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 combined sounder beacon 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. 1 Fixing Location for Combined Flare
Fig. 1 Fixing Location for Combined 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 – Hot surfaces. External surfaces
and internal components may be hot after
operation, take care when handling the
equipment.
Warning – High voltage may be present,
risk of electric shock. DO NOT open when
energised, disconnect power before
opening.
(Appropriate cable
glands to be
customer supplied)
Flameproof
cover
M6
Cover
Screws
M6 Spring
Washer
Beacon
Section
Sounder
Section
