Safety; Checking Pump/Motor Shaft Rotation; New Systems; Responsibility - DAB NKM-G Serie Instructions De Mise En Service Et D'entretien

6.2.

Safety

Use is allowed only if the electric system is in possession of safety precautions in accordance with the regulations
6.2.1.
in force in the country where the product is installed (for Italy, CEI 64/2).
6.3.

Checking pump/motor shaft rotation

Before installing the electropump, it is good practice to check that the pump shaft and/or the motor are moving freely. For
this purpose, if the pumps are supplied without a motor, check them by turning the pump coupling by hand. If the electropump
is supplied as a complete unit, check by turning the coupling by hand after having removed the coupling cover. When you
have finished checking, put the coupling cover back in its original position.
Do not force the shaft or the fan of the motor (if supplied) with pliers or other tools
to try to free the pump, but look for the cause of the blockage.
6.4.

New systems

Before running new systems the valves, pipes, tanks and couplings must be cleaned accurately. Often welding waste, flakes of
oxide or other impurities fall off after only a certain period of time. To prevent them from getting into the pump they must be
caught by suitable filters. The free surface of the filter must have a section at least 3 times larger than the section of the pipe
on which the filter is fitted, so as not to create excessive load losses. We recommend the use of TRUNCATED CONICAL
filters made of corrosion-resistant materials (SEE DIN 4181):
6.5.

Responsibility

The Manufacturer does not vouch for correct operation of the pumps if they are tampered with or
modified, run outside the recommended work range or in contrast with the other instructions given in
this manual.
The Manufacturer declines all responsibility for possible errors in this instructions manual, if due to
misprints or errors in copying. The company reserves the right to make any modifications to products
that it may consider necessary or useful, without affecting the essential characteristics.
6.6.

Protections

6.6.1.

Moving parts

In accordance with accident-prevention regulations, all moving parts (fans, couplings, etc.) must be accurately
protected with special devices (fan covers, coupling covers) before operating the pump.
6.6.2.

Noise level

The noise levels of pumps with standard supply motors are indicated in table 6.6.2 on page 103. Remember that,
in cases where the LpA noise levels exceed 85 dB(A), suitable HEARING PROTECTION must be used in the
place of installation, as required by the regulations in force.
6.6.3.

Hot and cold parts

Any leaks of dangerous or harmful liquids (for example, from the shaft seal) must be conveyed and disposed of in
6.6.4.
accordance with the regulations in force so as not to cause a risk or damage to persons and to the environment.
7.

INSTALLATION

The electropump must be fitted in a well ventilated place, with an environment temperature not exceeding 40°C.
As they have degree of protection IP55, the electropumps may be installed in dusty and damp environments. If
installed in the open, generally it is not necessary to take any particular steps to protect them against unfavourable
weather conditions. If the unit is installed in a location where there is a risk of explosion, the local regulations on
"Ex" protection must be respected, using only suitable motors.
5 1 2
During pump operation, keep well away from the moving parts (shaft, fan, etc.) unless it is
absolutely necessary, and only then wearing suitable clothing as required by law, to avoid being
caught.
As well as being at high temperature and high pressure, the fluid in the system may also be in
the form of steam! DANGER OF BURNING ! ! !
It may be dangerous even to touch the pump or parts of the system.
If the hot or cold parts are a source of danger, they must be accurately protected to avoid contact
with them.
The pumps may contain small quantities of residual water from testing. We advise flushing
them briefly with clean water before their final installation.
ENGLISH
3 4
23
(Filter for intake pipe)
1) Filter body
2) Narrow mesh filter
3) Differential pressure gauge
4) Perforated sheet
5) Pump intake aperture