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3) Type Approval Standards
The combined sounder beacon carries an EC Type Examination
Certificate of Conformity, and have been certified to comply with
the following standards:
EN60079-0 and EN IEC 60079-0/ IEC60079-0 : Explosive At-
mospheres - Equipment. General requirements
EN60079-1:2014 / IEC60079-1: Explosive Atmospheres -
Equipment protection by flameproof enclosures "d"
EN 60079-31:2014 / IEC60079-31:
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 con-
ditions (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 at least two of 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.
Pfannenberg GmbH · Werner Witt-Straße 1 · D-21035 Hamburg · Tel.: 040/7 34 12-0 · www.pfannenberg.com
05/2021
Fig. 1 Fixing Location for Combined Flare
7) Access to the Flameproof Enclosure
Warning – High voltage may be present,
risk of electric shock. DO NOT open when
energised, disconnect power before open-
ing.
Warning – Hot surfaces. External surfaces
and internal components may be hot after
operation, take care when handling the
equipment.
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.
(Appropriate cable
glands to be cus-
tomer supplied)
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 flame-
proof 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 re-
move it and try again. Never use the cover bolts to force the
cover into position.
8) Power Supply Selection
It is important that a suitable power supply is used to run the
equipment. The power supply selected must have the necessary
capacity to provide the input current to all of the units.
Page 10 / 16
Sounder
Section
Flameproof
Beacon
Section
cover
M6 Spring
Washer
M6
Cover
Screws
30080-014a
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