Safety
2-4
WILO EMU 3.0
that certain equipment requires a relay to function properly, e.g. posistor and PT100 sensor. This
relay can be obtained from the manufacturer or a specialist electronics dealer.
Staff must be informed of the installations used and how they work.
Operation in an explo-
sive atmosphere
Products marked as explosion-proof are suitable for operation in an explosive atmosphere. The
products must meet certain guidelines for this type of use. Certain rules of conduct and guidelines
must be adhered to by the operator as well.
Products that have been approved for operation in an explosive atmo-
sphere are labeled as explosion-protected “Ex” (e.g. T…Ex…). In addition,
an “Ex” symbol must be included on the type plate! When used in an
explosive atmosphere, the chapter entitled “Explosion protection
according to the …standard” must be observed!
Sound pressure
Depending on the size and capacity (kW), the products produce a sound pressure of approximately
70 dB (A) and 110 dB (A).
The actual sound pressure, however, depends on several factors. These include, for example, the
installation type (wet, dry, transportable), fastening of accessories (e.g. suspension unit) and pipe-
line, operating site, immersion depth, etc.
Once the product has been installed, we recommend that the operator make additional measure-
ments under all operating conditions.
Pumped fluids
Each pumped fluid differs in regard to composition, corrosiveness, abrasiveness, TS content and
many other aspects. Generally, our products can be used for many applications. For more precise
details, see chapter 3, the machine data sheet and the order confirmation. It should be remem-
bered that if the density, viscosity or the general composition change, this can also alter many
parameters of the product.
Different materials and impeller shapes are required for different pumped fluids. The more exact
your specifications on your order, the more exactly we can modify our product to meet your
requirements. If the area of application and/or the pumped fluid change, please inform us of this so
that we can adapt the product to the new circumstances.
When switching the product into another pumped fluid, observe the following points:
- Products which have been operated in sewage or waste water must be thoroughly cleaned
with pure water or drinking water before use.
- Products which have pumped fluids which are hazardous to health must always be decontam-
inated before changing to a new fluid. Also clarify whether the product may be used in a dif-
ferent pumped fluid.
- With products which have been operated with a lubricant or cooling fluid (such as oil), this can
escape into the pumped fluid if the mechanical shaft seal is defective.
Caution
Never operate the machine if the safety and monitoring devices
have been removed or damage, or if they do not work.
Caution: Wear ear protectors
In accordance with the laws in effect, guidelines, standards and
regulations, ear protection must be worn if the sound pressure is
greater than 85 dB (A)! The operator is responsible for ensuring
that this is observed!
Danger - explosive fluids
It is absolutely prohibited to pump explosive liquids (e.g. gasoline,
kerosene, etc.). The products are not designed for these liquids!
