General Information; Applications; Warranty; Safety - Grundfos DMH 251 Installation And Operating Instructions Manual

4. General information

4.1 Applications

The DMH 25x pump is suitable for liquid, non-abrasive and non-
inflammable media strictly in accordance with the instructions in
this manual.
Explosion-proof pumps are identified from the
pump and motor nameplates. An EC declaration
of conformity is provided in accordance with the
Note
EC directive 94/9/EC, the so-called ATEX
directive. This declaration of conformity replaces
the declaration of conformity in this manual.
Warning
To operate a pump which has been identified as
an explosion-proof pump for the dosing of
inflammable media or for operation in potentially
explosive operating sites in accordance with the
EC directive 94/9/EC, refer to the enclosed
manual "Operating an explosion-proof pump" in
addition to this manual.
Warning
Other applications or the operation of pumps in
ambient and operating conditions, which are not
approved, are considered improper and are not
permitted. Grundfos Alldos accepts no liability
for any damage resulting from incorrect use.

4.2 Warranty

Warranty in accordance with our general terms of sale and
delivery is only valid
• if the pump is used in accordance with the information within
this manual.
• if the pump is not dismantled or incorrectly handled.
• if repairs are carried out by authorised and qualified
personnel.
• if original spare parts are used for repairs.

5. Safety

This manual contains general instructions that must be observed
during installation, operation and maintenance of the pump. This
manual must therefore be read by the installation engineer and
the relevant qualified personnel/operators prior to installation and
start-up, and must be available at the installation location of the
pump at all times.
It is not only the general safety instructions given in this "Safety"
section that must be observed, but all special safety instructions
given in the other sections.

5.1 Identification of safety instructions in this manual

If the safety instructions or other advice in this manual are not
observed, it may result in personal injury or malfunction and
damage to the pump. The safety instructions and other advice are
identified by the following symbols:
Warning
If these safety instructions are not observed,
it may result in personal injury!
If these safety instructions are not observed,
it may result in malfunction or damage to the
Caution
equipment!
Notes or instructions that make the job easier
Note
and ensure safe operation.
Information provided directly on the pump, e.g. labelling of fluid
connections, must be maintained in a readable condition at all
times.

5.2 Qualification and training of personnel

The personnel responsible for the operation, maintenance,
inspection and installation must be appropriately qualified for
these tasks. Areas of responsibility, levels of authority and the
supervision of the personnel must be precisely defined by the
operator.
If the personnel do not have the necessary knowledge, the
necessary training and instruction must be given. If necessary,
training can be performed by the manufacturer/supplier at the
request of the operator of the pump. It is the responsibility of the
operator to make sure that the contents of this manual are
understood by the personnel.

5.3 Risks when safety instructions are not observed

Non-observance of the safety instructions may have dangerous
consequences for the personnel, the environment and the pump.
If the safety instructions are not observed, all rights to claims for
damages may be lost.
Non-observance of the safety instructions may lead to the
following hazards:
• failure of important functions of the pump/system
• failure of specified methods for maintenance
• harm to humans from exposure to electrical, mechanical and
chemical influences
• damage to the environment from leakage of harmful
substances.

5.4 Safety-conscious working

The safety instructions in this manual, applicable national health
and safety regulations and any operator internal working,
operating and safety regulations must be observed.

5.5 Safety instructions for the operator/user

Hazardous hot or cold parts on the pump must be protected to
prevent accidental contact.
Leakages of dangerous substances (e.g. hot, toxic) must be
disposed of in a way that is not harmful to the personnel or the
environment. Legal regulations must be observed.
Damage caused by electrical energy must be prevented (for more
details, see for example the regulations of the VDE and the local
electricity supply company).
5.6 Safety instructions for maintenance, inspection
and installation work
The operator must ensure that all maintenance, inspection and
installation work is carried out by authorised and qualified
personnel, who have been adequately trained by reading this
manual.
All work on the pump should only be carried out when the pump is
stopped. The procedure described in this manual for stopping the
pump must be observed.
Pumps or pump units which are used for media that are harmful
to health must be decontaminated.
All safety and protective equipment must be immediately
restarted or put into operation once work is complete.
Observe the points described in the initial start-up section prior to
subsequent start-up.
Warning
The pump must be installed in a position where
it is easily accessible during operation and
maintenance work.
Observe the flow direction of valves (indicated by
an arrow on the valve)!
Only tighten plastic valves by hand.
Only use the prescribed line types!
Electrical connections must only be carried out
by qualified personnel!
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