Eaton Crouse-Hinds Series Operating Instructions

Instruction sheet
MTL process alarm equipment
RTK PEX7250 explosion proof annunciator
Operating instructions
Introduction
This manual provides the information necessary to install, connect, test and maintain the RTK PEX7250 explosion proof
alarm annunciator.
Description
The RTK PEX7250 explosion proof annunciator is available with 1 of 3 of our established products fully integrated within the
enclosure. Option 1 = RTKP725, Option 2 = RTK725B/C and these versions are available using 30 x 30 mm, 30 x 60 mm or
60 x 60 mm window sizes. Option 3 = RTKSIL725 which is certified for SIL2 applications. This version is available in 30 x 60
mm or 60 x 60 mm window sizes.
The standard enclosure is copper free cast aluminium alloy and is finished in a light grey two-part epoxy paint, coloured
RAL7035, making it ideal for offshore applications. Systems are available in a range of formats and sizes and all carry the
same approval to internationally recognised Zone 1 standards.
Installation
This product has been certified to be mounted in
Zone 1,2,21 or 22 hazardous areas. Equipment must be
installed in accordance to IEC60079-14 (Electrical installation
in hazardous areas) or alternative national standards.
Manual Handling
Below are basic methods which should be observed while
handling the equipment.
• Assess the load (size, shape and weight). Is mechanical
or human assistance is required?
• Assess where the unit will be placed. Make sure there
are no obstructions, and the route is clear.
• Stand as close to the load as possible, with your feet
shoulder width apart.
• Bend your knees and try to keep the back's natural,
upright posture.
• Grasp the load firmly as close to the body as you can.
• Use the legs to lift the load in a smooth motion as this
offers more leverage reducing the strain on your back.
• Carry the load close to the body with the elbows tucked
into the body.
• Avoid twisting the body as much as possible by turning
your feet to position yourself with the load
Mounting
Unit is supplied with mounting brackets for vertical or
horizontal mounting.
Connection detail
Refer to wiring diagram supplied for terminal connections. All
wiring inside the box must be carried out in compliance with
the characteristics of the components.
1
1
Eaton Electric Limited,
Great Marlings, Butterfield, Luton
Beds, LU2 8DL, UK.
Tel: + 44 (0)1582 723633 Fax: + 44 (0)1582 422283
E-mail: rtkenquiry@eaton.com
www.mtl-inst.com
© 2019 Eaton
All Rights Reserved
Publication No. INS RTK PEX7250 Rev 8
June 2019
June 2018
INS RTK PEX7250 Rev 8
Use and Service
All the operations of installation and service will be carried out
when the circuit is not powered. Take care in not damaging
the coupling joints; always reapply the silicone grease to
the flanges before re-closing the box, and ensure all closing
screws have been returned and fully tightened. Use screws
of quality A2-70 according UNI 7323 with ultimate tensile
strength of at least 700N/mm²
Cable Entries
Refer to the General Arrangement drawing supplied with the
unit for details on cable entries fitted to the RTK PEX7250
Annunciator.
WARNING:
Ensure only correctly sized cable glands are used and
that any threaded hole within the lid or the body not
being used is closed with certified blanking plugs.
Cable entries shall also be suitably sealed if the enclosure
is to be used in dust atmospheres.
Specific Conditions of Use
1. It is the responsibility of the installation engineer to ensure
that suitably ATEX equipment certified Ex db IIB+H2 cable
glands and blanking plugs are installed to ensure that the IP
rating of IP66/67 is maintained on the Ex d enclosure.
2. When the enclosure is fitted with an MTL5521, the
enclosure must be mounted vertically.
EUROPE (EMEA): The given data is only intended as a product
description and should not be regarded as a legal
+44 (0)1582 723633
warranty of properties or guarantee. In the interest
mtlenquiry@eaton.com
of further technical developments, we reserve the
right to make design changes.
THE AMERICAS:
+1 800 835 7075
mtl-us-info@eaton.com
ASIA-PACIFIC:
+65 6 645 9888
sales.mtlsing@eaton.com