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1.0 INTRODUCTION
These certified beacons have been designed for use in potentially explosive atmospheres and harsh
environmental conditions. The enclosures are suitable for use offshore or onshore, where light weight
combined with corrosion resistance is required.
The housing is manufactured completely from a U.V. stable, glass reinforced polyester. Stainless steel screws
and mounting bracket are incorporated ensuring a totally corrosion free product.
Units can be painted to customer specification and supplied with identification labels.
2.0 GENERAL SAFETY MESSAGES AND WARNINGS
All instructions and safety messages in this manual must be followed to allow safe installation of the device.
The device must only be installed and maintained by correctly trained site personnel/installers.
i.
To reduce the risk of ignition of hazardous atmospheres and shock, do not apply power to the device
until installation has been completed and the device is fully sealed and secured.
ii.
To reduce the risk of ignition of hazardous atmospheres and shock, keep device tightly closed when
the circuit is energised.
iii.
Before removing the cover for installation or maintenance, ensure that the power to the device is
isolated.
iv.
Following installation, test the device to ensure correct operation.
v.
Following installation ensure a copy of this manual is made available to all operating personnel
vi.
When installing the device, requirements for selection, installation and operation should be referred to
e.g. IEE Wiring Regulations and the 'National Electrical Code' in North America. Additional national
and/or local requirements may also apply.
vii.
Cable termination should be in accordance with specification applying to the required application.
MEDC recommends that all cables and cores should be correctly identified. Please refer to the wiring
diagram in this manual (or separate diagram provided with the unit).
viii.
Ensure that only the correct listed or certified cable glands are used and that the assembly is
shrouded and correctly earthed.
ix.
Ensure that only the correct listed or certified stopping plugs are used to blank off unused gland entry
points and that the NEMA/IP rating of the unit is maintained.
x.
MEDC recommend the use of a sealing compound such as HYLOMAR PL32 on the threads of all
glands and stopping plugs in order to maintain the IP rating of the unit.
xi.
The internal earth terminal, where fitted, must be used for the equipment grounding and the external
terminal, if available, is for a supplementary bonding connection where local codes or authorities
permit or require such a connection.
xii.
When installing the device, MEDC recommends the use of stainless steel fasteners. Ensure that all
nuts, bolts and fixings are secure.
3.0 INSTALLATION
General
The device can either be directly mounted using the inserts moulded into the back of the enclosure
(standard), or an optional backstrap can be fixed to the base of the device thus giving an optional mounting
position for when direct mounting is deemed unsuitable.
For EN54-23:2010 Compliance the mounting back strap must be positioned in the horizontal plane. If
the direct mount option is ordered the mounting holes must also be on the same horizontal plane as
the back strap
The 2 off inserts in the base of the enclosure are designed to accept an M5 screw or bolt.
NOTE: For direct mounting, observe the following formula to determine the required fixing screw length:
Length of screw = Thickness of mounting surface + 10mm
The 2 off Ø8.5mm mounting holes in the optional backstrap have been designed to accept an M8 screw or
bolt.
© MEDC 2016
03/16
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