DANGER
Explosive environment
Death or serious personal injury
‐ Make sure the cable entries are not
damaged or cracked to avoid sparks
and a potential explosion.
Additional conditions for safe use:
1. The pump must not run dry.
2. The sewage pumps have an ambient
temperature range of -5 to +40 °C (air)
or 0-40 °C (submerged in liquid) and a
maximum operating temperature of 40
°C. The minimum ambient temperature
for a pump with a WIO sensor is 0 °C.
3. The maximum submersion depth is 20
m.
4. Dry-installed pumps often have a high-
er temperature at the cable entries
than submerged ones. This may re-
duce the lifespan of the Ex-protection
equipment. According to EN/IEC
60079-14, it is a user-responsibility to
regularly inspect the permanently at-
tached cables and cable entries for any
visual damage, cracks or embrittlement
caused by rubber aging.
5. The IO 113 control unit must protect
the sensor against short-circuit cur-
rents.
6. For painted pumps, minimise the risk
of discharge in the following ways:
• Earthing is mandatory.
• In dry installations, keep a safe dis-
tance between the pumps and walk-
ing paths.
• Use wet fabric for cleaning.
7. If a WIO sensor is fitted to the pump,
the sensor must be connected to a
control equipment. In case of an alarm
signal from the sensor, the control
equipment stops the pump.
8. The thermal protector in the stator
windings has a rated cut-out tempera-
ture (150 °C) ensuring the disconnec-
tion of the power supply. The power
supply must be reset manually.
Special conditions for safe use of WIO
sensor:
1. The control unit must protect the sen-
sor against short-circuit currents.
2. Install the WIO sensor so that it is not
exposed to mechanical impact.
3. The WIO sensor must not be used in
oil with auto-ignition temperature below
250 °C.
4. The WIO sensor is approved according
to EN 60079-0, EN60079-7,
EN60079-18, IEC60079-0,
IEC60079-18, IEC 60079-7. In Ex ap-
plications, the maximum current sup-
plied to the sensor must be limited to
350 mA according to EN/IEC 60079-18
and EN/IEC 60079-0.
5. The WIO sensor must only be used
with a galvanically isolated circuit.
Related information
2.5.1 Ex approval plate
11
English (GB)
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