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Installation Operation & Maintenance
Instruction Manual
BLS9200-IS Bilge/ Flood Detection Switch
Specific to Intrinsically Safe Installations
under ATEX, IECEx, & UKCA
Burrell Road Industrial Estate
Haywards Heath, West Sussex RH16 1TW, UK
Tel: +44 (0)1444 410040
www.psmmarine.com E-mail: sales@psmmarine.com
Doc Ref: Man 104B July 2024
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Summary of Contents for Alfa Laval scanjet PSM BLS9200-IS
- Page 1 Installation Operation & Maintenance Instruction Manual BLS9200-IS Bilge/ Flood Detection Switch Specific to Intrinsically Safe Installations under ATEX, IECEx, & UKCA Burrell Road Industrial Estate Haywards Heath, West Sussex RH16 1TW, UK Tel: +44 (0)1444 410040 www.psmmarine.com E-mail: sales@psmmarine.com Doc Ref: Man 104B July 2024...
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Page 2: Table Of Contents
Contents Introduction ........................1 Storage and Environmental Data ..................1 Safety and Handling Precautions ..................1 ATEX, IECEx & UKCA Certification ................... 1 Installation ......................... 4 Electrical Connection ......................4 Optional Termination Enclosures ................. 4 Operation and In-Service Test ................... 6 Maintenance Needs ...................... -
Page 3: Introduction
Introduction The Bilge Switch Model BLS 9200 is designed to be installed in ships bilges and tanks, where it is bolted in situ at the required alarm level. This switch is manufactured in corrosion resistant stainless steel fully submersible construction with a hermetically sealed Single Pole Changeover reed switch potted in epoxy. - Page 4 There are generally two earthing systems recognised. The so-called 'dirty earth' has all the non- critical data equipment and general equipment attached to it. The 'clean earth' has all the critical data systems attached to it on the basis that less ‘noise’ will be found on this earth Galvanic Isolators provide full galvanic isolation between safe area and hazardous area circuits with power limiting achieved by using a diode resistor network similar to that of a shunt-diode barrier.
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Page 6: Installation
Installation The BLS9200 is provided with an integral mounting bracket having 2 holes 9mm diameter on 44 mm centres, refer to the drawings in section 14 of this manual. The nominal switch actuation point is at a dimension of 50mm below the mounting holes and actuates on a rising level, therefore in tank fixing should be located at a datum of 50mm above the desired alarm actuation point. -
Page 8: Operation And In-Service Test
Operation and In-Service Test When the BLS 9200 is installed and in normal operation there is no requirement for user intervention. Operation is fully automatic where the switch will respond to the presence of liquid which causes the internal float to rise and operate the internal reed switch causing it to change state. Likewise, when the liquid level reduces below the switch position the BLS 9200 will automatically reset and the reed switch again change state. -
Page 9: Repair
Repair The BLS9200 is a fully welded and sealed assembly which contains no user serviceable parts. If a switch if found not to be operational after carrying out the tests detailed in the previous section, then it may be removed from its mountings and visually inspected. If it appears that contamination within the protective shield is preventing free movement of the float, then the switch may be flushed using clean warm water or a mild solvent / detergent compatible with stainless steel. - Page 15 PSM WEEE Producer Registration No WEE/HC0106WW Burrell Road Industrial Estate Haywards Heath, West Sussex RH16 1TW, UK Tel: +44 (0)1444 410040 www.psmmarine.com E-mail: sales@psmmarine.com...
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