MEDC FB11UL User Manual

Page 2

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 offshore or onshore, where light weight combined with corrosion resistance is required.
The beacon housing is manufactured completely from UV 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.

INSTALLATION

General

When installing and operating explosion-protected electrical equipment, requirements for
selection, installation and operation should be referred to eg. IEC 60079-14 worldwide
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 UL 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.
The unit can either be directly mounted using inserts into the back of the enclosure (stand-
ard), or backstrap (optional) can be fixed to the unit giving an optional mounting position
for when direct mounting is deemed unsuitable.
For direct mounting, the unit has been designed to accept M5* screws or bolts.
For backstrap mounting via 2 x Ш

" (Ш8mm) fixing holes.

MEDC recommend the use of stainless steel screws:
*Please note: for direct mounting, please observe the following formula to determine length
of fixing screw required:-
Length of Screw =

" (10mm) + Thickness of Mounting Surface.

Cable Termination

CAUTION: Before removing the cover assembly, ensure that the power to the unit is
isolated.
Unscrew and remove the 6 off screws holding the cover assembly to the base. Keep in a
safe, accessible location if non-captive.
Twist the cover assembly gently clockwise and anti-clockwise, whilst pulling it away from
the base. Remove to gain access to the interior.
Cable termination should be in accordance with specifications applying to the required
application. MEDC recommends that all cables and cores should be corrctly identified. Please
refer to the wiring diagram provided with the product.
Ensure that only 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 beacon and
integrated with the unit such that this rating is maintained.

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