MEDC BG2I Manuel Technique page 3

English
1. INTRODUCTION
These manual fire alarm call points have been designed for use in flammable atmospheres and harsh environmental
conditions. The GRP enclosures are suitable for use offshore or onshore where light weight combined with a high
level of corrosion resistance is required.
2. INSTALLATION
General
The unit should not be installed where it may be subjected to mechanical and thermal stresses or where it may
be attacked by existing or foreseeable aggressive substances.
The unit has been designed such that:
It DOES NOT give rise to physical injury or other harm due to contact.
It DOES NOT produce excessive surface temperature, infrared, electromagnetic or ionising radiation.
have
It DOES NOT
When installing and operating explosion-protected 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 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.
MEDC recommend the use of a sealing compound such as HYLOMAR PL32 on the threads of glands and stopping
plugs in order to maintain the IP rating of the unit.
The unit should be mounted on a vertical surface using the four fixing holes in the base.
MEDC recommend the use of M5 stainless steel screws.
Cable Termination
CAUTION: Before removing the cover assembly, ensure that the power to the unit is isolated.
Unscrew the 4 off M5 (4.0mm A/F hexagon key)
Lift the lid away from the base.
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 manual call point 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, carefully replace the lid back onto the base, avoiding damage to the mating
surfaces. Ensure the retaining strap is not trapped between the mating surfaces and that the O-ring is correctly
seated in its groove. Ensure the retaining strap and wires are clear of the microswitch actuator and operating
mechanism. Tighten the 4 off M5 (4.0mm A/F hexagon key) screws evenly.
3. OPERATION
The operating voltage of the unit is stated on the unit label.
unit for details of wiring and any fitted internal component values.
© Eaton MEDC Ltd 2017
any non-electrical dangers.
captive screws holding the lid to the base.
Please see the reference drawing supplied with each
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