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1.0 INTRODUCTION
These certified beacons have been designed for use in potentially explosive atmospheres and harsh environmental conditions. The
glass reinforced polyester 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 INSTALLATION
General
When installing and operating explosion-protected equipment, requirements for selection, installation and op- eration should
be referred to eg. IEE Wiring Regulations and the 'National Electrical Code' in North America. Additional national and/or
local requirements may apply.
Ensure that all nuts, bolts and fixings are secure.
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.
Mounting
The unit can either be directly mounted using the inserts moulded into the back of the enclosure (standard), or a
backstrap (optional) can be fixed to the base of the unit thus giving an optional mounting position for when direct
mounting is deemed unsuitable.
MEDC recommend the use of stainless steel screws.
Direct mounting: M5*
Backstrap mounting: M8
*Please note: For direct mounting, please observe the following formula to determine length of fixing screw required:-
Length of screw = Thickness of mounting surface + 10mm.
Cable Termination
CAUTION: Before removing the cover assembly, ensure that the power to the unit is isolated.
Unscrew the grub screw in the flange of the cover. Unscrew and remove the cover and lens assembly using the spanner supplied
to gain access to the inside of the unit. Unscrew the 2 off plastic thumbscrews and carefully lift the PCB assembly clear of the
mounting pillars to gain access to the terminals.
Cable termination should be in accordance with specifications applying to the required application. MEDC recommends that
all cables and cores should be correctly identified. Please refer to the wiring diagram provided with the product.
Ensure that only the correct listed or certified cable glands are used and that the assembly is shrouded and correctly earthed.
All cable glands should be of an equivalent NEMA/IP rating to that of the strobe and integrated with the unit such that this
rating is maintained.
The internal earth terminal, where fitted, must be used for the equipment grounding connection and the external terminal is for a
supplementary bonding connection where local codes or authorities permit or require such a connection.
Once termination is complete replace the PCB assembly onto the mounting pillars and fully tighten the thumb- screws.
Take care not to overtighten. Replace the cover assembly, ensuring the cover is screwed down fully. There should be a
maximum gap of 0.2mm between the faces of the cover and enclosure to ensure o-ring compression. Ensure the cover seal is
correctly seated in its groove during re-assembly. Re-tighten the grub screw in the cover flange to secure the cover.
© MEDC 2014
06/14
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