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1.0 Introduction
These manual fire alarm call points are available certified
intrinsically safe or uncertified. The units are manufactured
from Glass Reinforced Polyester (GRP) which provides a
robust, corrosion free construction and ensures effective
and reliable operation in harsh industrial and offshore
environments.
The units are available with the following options:
Transparent lift flap
Single pole or double pole switch
Up to 4 x M20 gland entries
Up to 6 x 4.0mm² terminals
LED (optional)
Test key facility
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 washer or
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 unit should be mounted on a vertical surface using
the two off Ø4.5mm fixing holes in the base. These have
been designed to accept and M4 screw or bolt. Note: the
cover assembly needs to be removed to access the unit
fixing holes.
MEDC recommend the use of stainless steel screws.
Access to terminals
Unscrew the 1 off M3 screw (2.5mm A/F hexagon
key) holding the glass cover in place. Lift glass cover
away from the main cover to expose the main cover
screws. Unscrew the 4 off M4 cover screws (3.0mm
A/F hexagon key) and remove the cover. Keep all
components and fixings in a safe, accessible place.
Gently remove the cover assembly from the base of the
enclosure. The terminal block is fixed to the underside of
the main cover.
Once termination is complete, carefully replace the
cover assembly back onto the base avoiding damage
to the mating surfaces. Ensure that the wires are not
trapped between the mating surfaces and that the
o-ring is correctly seated in its groove. Ensure the wires
are clear of the micro switch actuator and operating
mechanism. Tighten the 4 off M4 screws (3.0mm A/F
hexagon key) evenly. Check that the glass element is
seated correctly in the cover, and then replace the glass
cover, securing it with the 1 off M3 screw (2.5mm A/F
hexagon key).
Following termination, it is recommended that the unit
is tested as per the procedure below to ensure correct
operation.
Call point BG3 TM177.D February 2022 www.eaton.com
Call point BG3
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