Eaton Crouse-Hinds Series Operating Instructions Manual

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RTK PEX7250 explosion proof annunciatorOperating instructionsJune 2018INS RTK PEX7250 Rev 8Instruction sheetMTL process alarm equipment1Eaton Electric Limited,Great Marlings, Butterfield, LutonBeds, LU2 8DL, UK.Tel: + 44 (0)1582 723633 Fax: + 44 (0)1582 422283E-mail: rtkenquiry@eaton.comwww.mtl-inst.com© 2019 EatonAll Rights ReservedPublication No. INS RTK PEX7250 Rev 8June 20191EUROPE (EMEA):+44 (0)1582 723633mtlenquiry@eaton.comTHE AMERICAS:+1 800 835 7075mtl-us-info@eaton.comASIA-PACIFIC:+65 6 645 9888sales.mtlsing@eaton.comThe given data is only intended as a productdescription and should not be regarded as a legalwarranty of properties or guarantee. In the interestof further technical developments, we reserve theright to make design changes.IntroductionThis manual provides the information necessary to install, connect, test and maintain the RTK PEX7250 explosion proofalarm annunciator.DescriptionThe RTK PEX7250 explosion proof annunciator is available with 1 of 3 of our established products fully integrated within theenclosure. Option 1 = RTKP725, Option 2 = RTK725B/C and these versions are available using 30 x 30 mm, 30 x 60 mm or60 x 60 mm window sizes. Option 3 = RTKSIL725 which is certified for SIL2 applications. This version is available in 30 x 60mm 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, colouredRAL7035, making it ideal for offshore applications. Systems are available in a range of formats and sizes and all carry thesame approval to internationally recognised Zone 1 standards.InstallationThis product has been certified to be mounted inZone 1,2,21 or 22 hazardous areas. Equipment must beinstalled in accordance to IEC60079-14 (Electrical installationin hazardous areas) or alternative national standards.Manual HandlingBelow are basic methods which should be observed whilehandling the equipment.• Assess the load (size, shape and weight). Is mechanicalor human assistance is required?• Assess where the unit will be placed. Make sure thereare no obstructions, and the route is clear.• Stand as close to the load as possible, with your feetshoulder 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 thisoffers more leverage reducing the strain on your back.• Carry the load close to the body with the elbows tuckedinto the body.• Avoid twisting the body as much as possible by turningyour feet to position yourself with the loadMountingUnit is supplied with mounting brackets for vertical orhorizontal mounting.Connection detailRefer to wiring diagram supplied for terminal connections. Allwiring inside the box must be carried out in compliance withthe characteristics of the components.Use and ServiceAll the operations of installation and service will be carried outwhen the circuit is not powered. Take care in not damagingthe coupling joints; always reapply the silicone grease tothe flanges before re-closing the box, and ensure all closingscrews have been returned and fully tightened. Use screwsof quality A2-70 according UNI 7323 with ultimate tensilestrength of at least 700N/mm²Cable EntriesRefer to the General Arrangement drawing supplied with theunit for details on cable entries fitted to the RTK PEX7250Annunciator.WARNING:Ensure only correctly sized cable glands are used andthat any threaded hole within the lid or the body notbeing used is closed with certified blanking plugs.Cable entries shall also be suitably sealed if the enclosureis to be used in dust atmospheres.Specific Conditions of Use1. It is the responsibility of the installation engineer to ensurethat suitably ATEX equipment certified Ex db IIB+H2 cableglands and blanking plugs are installed to ensure that the IPrating of IP66/67 is maintained on the Ex d enclosure.2. When the enclosure is fitted with an MTL5521, theenclosure must be mounted vertically.

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