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2. Contents of the packaging
1 EWLI-3B consisting of:
Add-on housing with number of probes ordered (EL65 (<=32bar) or EL60 (>32bar))
Measuring unit (MU); fitted onto the add-on housing and fully wired
Control unit (CU)
1 Power supply (top-hat rail) for supplying the control unit (CU) with 24VDC
1 set of installation and operating instructions
3 Use in compliance with regulations
The EWLI-3B (electronic water level indicator) is used as a remote water level indicator for steam
boilers or (pressure) tanks with electrically conductive liquids. Depending on the regulations applied
the EWLI-3B can also be used as a multi-control system (indicator - limiter ‒ controller), by means of
the programmable assignment of outputs (change-over contacts) relative to the levels. The EWLI-3B
add-on housing is fastened to the process connections provided on the tank.
The EWLI-3B has been developed in accordance with the requirements of EC Directive 97/23/EC
(2003) and the standards:
DIN EN 12952 1-7,
DIN EN 12953 1-6,
DIN EN 61000 6-2
DIN EN 61000 6-4
DIN EN 61000 3-2
DIN EN 61000 3-3
DIN EN 61010 1
The device is used for measuring the level of a liquid. It is used predominantly on steam boilers. With
the aid of probes the EWLI-3B measures the current level in the add-on housing and thus in the
boiler. With the ability of having up to 32 Probes (minimum 2) one achieves a quasi-continuous level
display, taking into account a minimum probe spacing of 36mm.
4. System Description
4.1 Components
- Add-on housing with number of probes ordered (EL65 (<=32bar) or EL60 (>32bar))
- Measuring unit (MU); fitted onto the add-on housing and fully wired
- Control unit (CU) with separate power supply unit; for top-hat rail fitting in the distribution cabinet
- Display unit (DU) ‒ optional
- various CAN-Bus connecting cables
