Wilo Sub TWI 4 Serie Notice De Montage Et De Mise En Service page 27

1 Introduction
1.1 About this document
The language of the original operating manual is Ger-
man. All other language versions are translations of the
original German manual.
The operating manual contains a copy of the EC Decla-
ration of Conformity.
Any unauthorized or unapproved changes made to the
constructions specified therein will nullify this declara-
tion.
1.2 Layout of the manual
The manual is divided into individual chapters. Each
chapter has a heading which clearly describes the con-
tent of that chapter.
The table of contents also serves as a brief reference,
since all the important sections have their own head-
ers.
All the important operating and safety instructions are
highlighted. For detailed information on the structure
of these texts, see "Safety" in Chapter 2.
1.3 Personnel qualifications
All personnel who work on or with the product must be
qualified for such work; electrical work, for example
may only be carried out by a qualified electrician. All
personnel must be of legal age.
Operating and maintenance personnel must also
observe national accident prevention regulations.
It must be ensured that personnel has read and under-
stood the instructions in this operating and mainte-
nance handbook; if necessary, this manual must be
ordered from the manufacturer in the required lan-
guage.
This product is not intended to be used by persons
(including children) with limited physical, sensory or
mental abilities or without experience and/or without
knowledge, unless they are supervised by a person
responsible for their safety and receive instructions
from this person as to how the product is to be used.
Children must be supervised in order to ensure that
they do not play with the product.
1.4 Abbreviations and technical terms
Various abbreviations and technical terms are used in
this operating and maintenance manual.
1.4.1 Abbreviations
• p.t.o = please turn over
• approx. = approximately
• i.e. = that is
• incl. = included
• min. = minimum
• max. = maximum
• etc. = and so on
• s.a. = see also
• e.g. = for example
Installation and operating instructions Wilo-Sub TWI 4..., TWI 4...-QC
1.4.2 Terms
Dry run
The product is running at full speed, however, there is
no liquid to be pumped. A dry run is to be strictly
avoided. If necessary, a safety device must be installed!
Dry-run protection
The dry-run protection is designed to automatically
shut down the product if the water level falls below the
minimum water coverage value of the product. This is
made possible by installing a float switch or level sen-
sor, for example.
Level control
The level control is designed to switch the product on
or off at various filling levels. This is made possible by
installing either one or two float switches.
1.5 Copyright
This operation and maintenance manual has been
copyrighted by the manufacturer. The operation and
maintenance handbook is intended for use by assem-
bly, operating, and maintenance personnel. It contains
technical specifications and diagrams which may not
be reproduced or distributed, either completely or in
part, or used for any other purpose without the
expressed consent of the manufacturer.
1.6 Rights of alteration
The manufacturer reserves the right to make technical
alterations to systems or components. This operating
and maintenance manual refers to the product indi-
cated on the title page.
1.7 Warranty
This chapter contains the general information on the
warranty. Contractual agreements have the highest
priority and are not superseded by the information in
this chapter!
The manufacturer is obliged to correct any defects
found in the products it sells, provided that the follow-
ing requirements have been fulfilled:
1.7.1 General
• The defects are caused by the materials used or the
way the product was manufactured or designed.
• The defects were reported in writing to the manufac-
turer within the agreed warranty period.
• The product was used only as prescribed.
• All safety and control devices were connected and
inspected by qualified personnel.
1.7.2 Warranty period
If no other provisions have been made, the warranty
period applies to the first 12 months after initial start-
up or to a max. period of 18 months after the delivery
date. Other agreements must be made in writing in the
order confirmation. These will remain valid at least until
the agreed warranty period of the product has expired.
English
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