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Installation and operating instructions
1 General
About this document
These Installation and Operating Instructions are
an integral part of the product. They must be kept
readily available at the place where the product is
installed. Strict adherence to these instructions is
a precondition for the proper use and correct
operation of the product.
These Installation and Operating Instructions cor-
respond to the relevant version of the product and
the underlying safety standards valid at the time
of going to print.
2 Safety
These operating instructions contain basic infor-
mation which must be adhered to during installa-
tion and operation. For this reason, these
operating instructions must, without fail, be read
by the service technician and the responsible
operator before installation and commissioning.
It is not only the general safety instructions listed
under the main point "safety" that must be
adhered to but also the special safety instructions
with danger symbols included under the following
main points.
2. 1 Designation of information in the operating
instructions
Symbols:
General danger symbol
Danger due to electrical voltage
NOTE
Signal words:
DANGER!
Acutely dangerous situation.
Non-observance results in death or the most
serious of injuries.
WARNING!
The user can suffer (serious) injuries. 'Warning'
implies that (serious) injury to persons is proba-
ble if this information is disregarded.
CAUTION!
There is a risk of damaging the pump/unit. 'Cau-
tion' implies that damage to the product is likely
if the information is disregarded.
NOTE: Useful information on using the product. It
draws attention to possible problems.
Installation and operating instructions Wilo-Sub TWU4
2. 2 Personnel qualifications
The installation personnel must have the appro-
priate qualification for this work.
2. 3 Danger in the event of non-observance of the
safety instructions
Non-observance of the safety instructions can
result in risk of injury to persons damage to the
pump/unit. Non-observance of the safety
instructions can result in the loss of any claims of
damages.
In detail, non-observance can, for example, result
in the following risks:
• Failure of important pump/unit functions,
• Failure of required maintenance and repair proce-
dures,
• Danger to persons from electrical, mechanical or
bacteriological influences,
• Property damage
2. 4 Safety instructions for the operator
The existing directives for accident prevention
must be adhered to.
Danger from electrical current must be eliminated.
Local directives or general directives [e.g. IEC, VDE
etc.] and local power supply companies must be
adhered to.
2. 5 Safety information for inspection and
installation work
The operator must ensure that all inspection and
installation work is carried out by authorised and
qualified personnel, who are sufficiently informed
from their own detailed study of the operating
instructions.
Work to the pump/unit must only be carried out
when at a standstill.
2. 6 Unauthorised modification and manufacture of
spare parts
Modifications to the pump/unit are only permissi-
ble after consultation with the manufacturer.
Original spare parts and accessories authorised by
the manufacturer ensure safety. The use of other
parts can nullify the liability from the results of
their usage.
2. 7 Improper use
The operating safety of the supplied pump/unit is
only guaranteed for conventional use in accord-
ance with Section 4 of the operating instructions.
The limit values must on no account fall under or
exceed those specified in the catalogue/data
sheet.
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