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1. General
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
conform to the relevant version of the product
and the underlying safety standards valid at the
time of going to press.
1.1 Applications
Pumps aimed at clear liquids in building, agricul-
ture and industry areas ... (water supply – water
tower - sprinkling, irrigation, high pressure
washing , fire protection, – Lifting of conden-
sates – air conditioning – Industrial circuits and
integration in all modular systems.).
- boiler supply (with mandatory by-pass kit).
1.2 Technical characteristics
• Maximum operating pressure (Depending on
types):
10 or 16 bar:
Notice: the actual input pressure (P input) + the
pressure at zero delivery rate (P zero delivery
rate) must always be lower than the maximum
authorised operating pressure (Pmax). If the
maximum authorised operating pressure is
exceeded, the mechanical seal and the roller
bearing can be damaged or their life span
.reduced
P input + P zero delivery rate ≤ Pmax
Refer to the pump plate for the maximum oper-
ating pressure: Pmax
• Temperature range:
(EPDM O'ring and mechanical seal) - 15° to + 90°C
• Ambient temperature (standard): + 40°C maxi
• Maximum suction head: according to NPSH of the
pump
Sound level: Depends on pump size, rotation
speed, working point, motor type: it can exceed
70 dB(A) in 50 Hz and 75 dB(A) in 60 Hz.
2. Safety
These instructions contain important information
which must be followed when installing and
operating the pump. It is therefore imperative
that they be read by both the installer and the
operator before the pump is installed or operat-
ed. Both the general safety instructions in this
section and the more specific safety points in the
following sections should be observed.
Installation and operating instructions - Wilo-MVIL
2.1 Instruction symbols used in this operating
manual
Symbols
General danger symbol.
Hazards from electrical causes.
NOTE: ....
Signal words:
DANGER! Imminently hazardous situation. Will
result in death or serious injury if not avoided.
WARNING! Risk of (serious) injury. 'Warning'
implies that failure to comply with the safety
instructions is likely to result in (severe) per-
sonal injury.
CAUTION! Risk of damage to the pump/instal-
lation. 'Caution' alerts to user to potential
product damage due to non-compliance with
the safety instructions.
NOTE! Useful information on the handling of the
product.
It alerts the user to potential difficulties.
2.2 Personnel qualification
The personnel installing the pump must have the
appropriate qualification for this work.
2.3 Risks incurred by failure to comply with the
safety instructions
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 precautions could also invalidate any claim
for damages.
In particular, failure to comply with these safety
instructions could give rise, for example, to the
following risks:
• Failure of important pump or system functions,
• Failure of specified maintenance and repair
methods
• Personal injury due to electrical, mechanical and
bacteriological causes.
• Damage to property.
2.4 Safety instructions for the operator
The relevant accident precaution regulations
must be observed.
Potential dangers caused by electrical energy
must be excluded. Local or general regulations
[e.g. IEC, VDE, etc.] and directives from local
energy supply companies are to be followed.
2.5 Safety instructions for inspection and assembly
The operator must ensure that all inspection and
assembly work is carried out by authorised and
qualified specialists who have carefully studied
these instructions.
Work on a pump or installation should only be
carried out once the latter has been brought to a
standstill.
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