Summary of Contents for Igema EWLS
- Page 1 Electronic Water Level Switch EWLS for use with level probes: EL65 or EL60 Edition 03/2021 D-05-B-51500-EN-00 Installation and operating instruction...
- Page 2 Product philosophy Thank you for placing your trust in IGEMA and deciding in favour of one of our high-quality products. For more than 100 years, measuring and control systems have been developed, produced and sold worldwide under the IGEMA brand name.
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Page 3: Table Of Contents
Table of contents 1. Important safety instructions ................6 1.1 Symbols used in these instructions ..............6 1.2 Intended use of the device ................7 1.3 Safety at work ....................8 1.4 Safety instructions for this device ..............9 1.5 Exclusion of liability ................... 9 2. - Page 4 Table of contents 5. Assembly and Installation ................14 5.1 Water column ....................14 5.1.1 Installation dimensions and descriptions ............ 15 5.1.2 Installation ....................15 5.2 Control unit CU-3 .................... 16 5.2.1 Installation dimensions and descriptions ............ 16 5.2.2 Power connection ..................17 5.3 Measuring unit MU-3 ..................
- Page 5 Table of contents 10. System maintenance..................27 10.1 Depressurising the water column ..............27 10.2 Dismantling and fitting probes ..............28 11. Fault analysis and rectification ................ 29 12. Declaration of conformity ................. 31 13. Attachments ...................... 32...
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Page 6: Important Safety Instructions
Unqualified persons must not be assigned the above tasks! IGEMA GmbH accepts no liability for damage to property or personal injury caused by unqualified persons or by failure to observe these installation and operating instructions. If no sufficiently qualified person can be found, IGEMA GmbH can be commissioned with the installation/maintenance. -
Page 7: Intended Use Of The Device
The correct installation position, alignment and flow direction of the device must be observed! Before installing the IGEMA product on boilers or containers, it is essential to remove all protective covers and, if necessary, the protective film from rating plates. -
Page 8: Safety At Work
1.3 Safety at work Before installation or carrying out maintenance work on the device, safe access must be ensured and a secure working area with sufficient lighting must be defined and marked out. Always use lifting equipment for heavy loads! Danger Before starting any work, carefully check which liquids or gases are or have been in the pipeline. -
Page 9: Safety Instructions For This Device
IGEMA GmbH Mess- und Regelsysteme will assume no liability if the above regulations, instructions and safety precautions are not observed and followed. If they are not expressly listed in the installation and operating instructions, changes to an IGEMA device are carried out at the risk of the user. -
Page 10: Contents Of The Packaging
1 set of installation and operating instructions 3. Important information 3.1 Use in compliance with regulations The Electronic Water Level Switch (EWLS) is used for level monitoring of electrically conductive liquids. Typical applications: - Steam lines (monitoring and discharge of condensate) -
Page 11: Function
4.2 Function The detection is done by a conductive measuring principle, which requires a minimum conductivity of the liquid. The conductivity of the medium is measured in the unit µS/cm. The conductive measuring method makes two statements: electrode immersed, or electrode immersed. -
Page 12: Setup
4.3 Setup For ensuring high availability IGEMA recommends the use of 2 power supply units (redundancy). In terms of hardware the CU-3 is designed for operation with 2 power supply units. Both the measuring unit (MU-3) and the control unit (CU-3) have 2 independent electronic circuits with their own processors. -
Page 13: Operation
IGEMA EWLI3 - CU 4.5 Operation Operation of the EWLS is carried out by the 4 buttons on the front of the Control Unit CU-3. This is described in Chap. 6 “Configuration via Menu”. 4.6 Error message In the LCD display of the CU-3 errors from the evaluator and probes are displayed number- coded and in plain text abbreviations. -
Page 14: Assembly And Installation
Enabling: * Individual switch points e.g. horn when exceeding or falling below a fill level * Double switch points e.g. for a pump control In the case of identical programming of two outputs a “DPDT output” is possible. - 1 4mA..20mA output for loads up to 500Ω, not galv. insulated (optional) 5. -
Page 15: Installation Dimensions And Descriptions
5.1.1 Installation dimensions and descriptions Process connection: on the side Process connection: on the top/bottom Boiler / Vessel connection dimensions Visible length / switching range Minimum water level Probe distance 5.1.2 Installation The water column with probes is supplied fully pre-wired. It is attached via the process connections in accordance with the rules / regulations on the boiler. -
Page 16: Control Unit Cu-3
With quick fitting with a spring catch for standard DIN EN 50022 35 mm carrier rail Fix device on standard carrier rail by means of the snap fastening (4). 5.2.1 Installation dimensions and descriptions Front view: IGEMA EWLI3 - CU Side view:... -
Page 17: Power Connection
5.2.2 Power connection The device terminal strip is live during operation!! Before working on the device disconnect it from the mains!! Danger If inductive equipment is connected, voltage peaks occur when switching off. For this reason, connected inductive equipment (e.g. contactor) must be provided additionally with an RC circuit: e.g. -
Page 18: Measuring Unit Mu-3
5.3 Measuring unit MU-3 The measuring unit is fixed to the water column and the probes are fully wired. The connection to the control unit takes place via a 5-pin plug at the bottom of the switching cabinet of the measuring unit. -
Page 19: Configuration Via Menu
6. Configuration via Menu The menu of the EWLS is divided into two levels: Level 1 | Level 2 The menu is accessed by pressing the “OK” key. A menu item of Level 1 will appear in the LCD display. With the keys “▲” or “▼” you can choose between the menu items of the respective level. - Page 20 Diagram: | --- 1. System Info | - 1.1. Probe state | - 1.2. Relay state | - 1.3. MU system A | - 1.4. MU system B | --- 2. Supply |- 2.1. Input Pin 1 |- 2.2. Input Pin 2 |- 2.1.
- Page 21 Cannot be changed otherwise the function of the Caution EWLS will be lost. The flashing cursor marks the position where an entry is possible. In some menus this can be moved with the arrow keys (“▲” or “▼”), otherwise the arrow keys change the value saved.
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Page 22: Special Features Of System Setup
8. Commissioning Commissioning and maintenance must be carried out by qualified personnel! If no sufficiently qualified person can be employed, IGEMA GmbH can be commissioned to carry out the commissioning. In principle IGEMA GmbH recommends commissioning the indicator at the same time Danger as the boiler (point 8.3). -
Page 23: Factory Settings
All delays for switching operations are set to “00”s. All 3 additional outputs must be assigned to a probe, even if they are not in use. IGEMA recommends assigning unused probes to the top probe. However there is the possibility to create redundancy. -
Page 24: Technical Data
Technical data 9.1 Device data Manufacture in accordance with: EU Directive 2014/35/EU EU Directive 2014/30/EU EU Directive 2014/68/EU Applied standards: EN 61000 -4 EN 61000 -6 DIN EN 12952-7 DIN EN 12953-6 EN 61010-1 EN 13445 Data exchange: CAN-Bus in accordance with DIN ISO 11898, CANopen protocol Number of probes: 2 to 4... -
Page 25: Mains Transformer
Input / Programming 4 keys Working temperature: 0°C to +55°C Self-Test every 3 s 9.2 Mains transformer The mains transformer supplied is an integral part of the EMC tests. IGEMA only guarantees EMC compliance when the power supply unit supplied is used. -
Page 26: Rating Plate
9.3 Rating plate The description EWLS - 2 refers to the number of probes in the device. Item numbers und serial numbers are examples, that are not valid for orders. If you intend to order please contact IGEMA-sales department. Caution... -
Page 27: System Maintenance
It is assumed that the person charged with the maintenance tasks is fully conversant with measurement and control systems. Untrained persons must not carry out maintenance work! If there is no adequately qualified person available, IGEMA GmbH can be brought in to service your measurement and control system. -
Page 28: Dismantling And Fitting Probes
10.2 Dismantling and fitting probes Attention! Disassembly only in cold condition! Caution hot! • Remove the protective housing “roof” • Loosen the nut at the end of the probe and remove the cable eyes • Loosen the M20 floor fixing nut of the housing •... -
Page 29: Fault Analysis And Rectification
11. Fault analysis and rectification The device terminal strip is live during operation!! Before working on the device disconnect it from the mains!! Danger Over the LCD display of the CU-3 (error code and plain text abbreviation) various errors are displayed during operation. - Page 30 Fehler der MU B alle 3 LEDs aus: keine 24V Versorgung This high-quality IGEMA product was designed, manufactured and tested with the application of the QM System guidelines in accordance with DIN EN ISO 9001:2015. If the device supplied indicates transport damage or gives cause for complaint in spite of our final quality control please contact our SERVICE department on telephone +49 2501 92424-0.by return.
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Page 31: Declaration Of Conformity
12. Declaration of conformity... -
Page 32: Attachments
13. Attachments List of accessories: Power supply unit Art.-no.: 40-53105 Switch amplifier for galvanic decoupling of the current output Art.-no.: 20-10016 Assembled BUS connecting cable (including assembled plug and plug socket): Art.-no.: 40-10392 Art.-no.: 40-10111 Art.-no.: 40-10112 Art.-no.: 40-10393 Art.-no.: 40-10394 BUS connecting cable not assembled for all devices: Length as ordered Art.-no.: 40-55216...