English
Installation and operating instructions Wilo-MVIS 15, 30, 50
3
1 General
1.1 About this document
These Installation and Operating Instructions form
an integral part of the unit. They must be kept close
to the unit and in readiness whenever required. Pre-
cise observance of these instructions is a pre-condi-
tion for use of the unit for the intended purpose and
for its correct operation.
These Installation and Operating Instructions con-
form to the relevant version of the equipment and
the underlying safety standards valid at the time of
going to press.
2 Safety
These instructions contain important information
which must be followed when installing and operat-
ing the pump. It is therefore imperative that they be
read by both the installer and the operator before
the pump is installed or started up.
Both the general safety instructions in the ‘Safety
precautions’ section and those in subsequent sec-
tions indicated by danger symbols should be care-
fully observed.
2.1 Symbols and signal words used in these operating
instructions
Symbols:
NOTE:...
Signal words:
NOTE:
A NOTICE WITH USEFUL INFORMATION FOR THE
USER IN RELATION TO THE PRODUCT. IT INFORMS
THE USER TO POSSIBLE PROBLEMS.
2.2 Qualified Personnel
The personnel installing the pump must have the
appropriate qualifications for this work.
2.3 Risks incurred by failure to comply with the safety
precautions
Failure to comply with the safety precautions could
result in personal injury or damage to the pump or
installation. Failure to comply with the safety pre-
cautions could invalidate warranty and/or damage
claims.
In particular, failure to comply with these safety pre-
cautions could increase the possibility of the follow-
ing risks:
• the failure of important parts of the pump or instal-
lation,
• personal injury due to electrical and mechanical
causes,
• material damage.
2.4 Safety precautions for the operator
Existing regulations for the prevention of accidents
must be observed.
National Electrical Codes, local codes and regula-
tions must be followed.
2.5 Safety precautions for inspection and installation
The operator must ensure that all inspection and
installation work is carried out by authorized and
qualified specialists who have carefully reviewed
these instructions.
Work on the pump/unit must be carried out only with
the pump switched off and at complete standstill.
2.6 Unauthorized alterations and manufacture of
spare parts
Alterations to the pump or installation may only be
carried out with the manufacturer's consent. The use
of original spare parts and accessories authorized by
the manufacturer will ensure safety. The use of any
other parts may invalidate claims invoking the liabil-
ity of the manufacturer for any consequences.
2.7 Improper use
The operational safety of the pump or installation
supplied can only be guaranteed if it is used in accor-
dance with paragraph 4 of the operating instruc-
tions. The limits given in the catalogue or data sheet
must under no circumstances be exceeded.
General Safety symbol
Hazards from electrical causes
DANGER!
Imminently hazardous situation.
Will result in death or serious injury if not avoided.
WARNING!
The user can be exposed to (severe) injury. 'Warn-
ing' refers that harm to the user when the user is
neglecting the procedure.
CAUTION!
The product is at risk of damage. 'Caution' refers
to the product when the user is neglecting the
procedures.
