Wilo Drain MTC 32, Инструкция по установке и эксплуатации

Страница: 33 / 348

Installation and operating instructions Wilo-Drain MTC 32 33
SAFETY English
such as soft startup control or frequency drives
are used, the relay manufacturer’s specifications
must be followed to comply with the electromag-
netic compatibility (EMC) requirements. Special
separate shielding measures (e.g. shielded cables,
filters, etc.) may be necessary for the power sup
-
ply and control cables.
The connections may only be made if the relays
meet the harmonized EU standards. Mobile
radio equipment may cause malfunctions in the
system.
BEWARE of electromagnetic radiation!
Electromagnetic radiation can pose a fatal risk
for people with pacemakers. Put up appropri-
ate signs and make sure anyone affected is
aware of the danger!
2.7. Ground connection
Our products (unit including protective devices
and control station, auxiliary hoisting gear) must
always be grounded. If there is a possibility that
people can come into contact with the product
and the pumped liquid (for example on construc -
tion sites), the connection must be additionally
equipped with a residual current circuit breaker.
The pump units are submersible and conform to
protection class IP 68 in terms of the applicable
standards.
The protection class of the installed switching
devices can be found on the device housing and
the operation manual.
2.8. Safety and monitoring devices
Our products can be equipped with mechanical
(e.g. intake strainer) and/or electrical (thermo
sensors, moisture sensors, etc.) safety and mon
-
itoring devices. These devices must be attached
and connected.
Electrical devices such as thermo sensors or float
switches must be connected and tested by an
electrician before start-up.
Please note that certain devices require a relay to
function properly, for example a PTC thermistor
and PT100 sensor. This relay can be obtained
from the manufacturer or an electrical supply
dealer.
Personnel must be informed of the systems
used and how they work.
CAUTION!
Never operate the product if the safety and
monitoring devices have been removed or
damaged, or if they do not work.
2.9. Safety rules during operation
When operating the product, always follow the
locally applicable laws and regulations for work
safety, accident prevention and handling elec-
trical machinery. To help to ensure safe working
practice, the responsibilities of employees should
be clearly set out by the owner. All personnel
are responsible for ensuring that regulations are
observed.
The product has moving parts. During operation,
these parts turn to pump the fluid. Certain ma -
terials in the pumped fluid can cause very sharp
edges to form on the moving parts.
BEWARE of rotating parts!
The rotating parts can crush and sever limbs.
Never reach into the hydraulics or the moving
parts during operation.
• Before performing maintenance or repairs,
switch off the product, disconnect it from the
mains and secure it against being switched on
again without authorization.
• Let the moving parts come to a stop!
2.10. Operation in an explosive 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 guide-
lines must be also followed by the operator.
Products that have been approved for use in an
explosive atmosphere are marked as follows:
• An “Ex” symbol must be attached to the name
plate.
• Information on the explosion protection classi -
fication and certification must be stated on the
name plate.
When using a product in an explosive atmo-
sphere, observe the information on explosion
protection provided in the other sections.
BEWARE of using accessories not approved for
use in an explosive atmosphere!
If you use explosion-certified products in an
explosive atmosphere, the accessories must
also be approved for this use. Check all acces-
sories before use to verify that they conform
to this directive.
2.11. Pumped liquids
Each pumped liquid differs in respect of compo -
sition, corrosiveness, abrasiveness, dry matter
content and in many other aspects. Generally,
our products can be used for many applications.
Please note that if requirements change (density,
viscosity or general composition), this can also
affect many parameters of the product.
When using or replacing the product in a different
pumped liquid, observe the following points:
• Products that have been operated in dirty waste
water must be cleaned thoroughly before being
used for other pumped liquids.
• Products that have been operated in sewage
water and/or fluids that are hazardous to health
must be decontaminated before being used with
other pumped liquids.
It must be clarified, whether the product can be
used at all with another pumped liquid.