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4. Installation
Since an HD pump is an unfinished machine, it is not possible for the manufacturer to include all the
essential safety devices, such as logic control and emergency stop. It is important, therefore, that the
installer takes care of these aspects. In principle, all required safety devices are included in the
installation instructions. After installation, the installer must make sure that the whole unit fully
conforms with relevant European legislation.
4.1 General
The pipeline system into which the HD is installed must comply with the following requirements:
Overpressure protection (I) must be installed;
o
The overpressure protection must activate if the pump or pipeline reaches maximum
working pressure.
Flexible hoses must be used for connections;
o
This prevents vibrations from being transported and breaking pipes.
A motor protection switch must be installed and set to the correct flow;
An isolation switch must be installed within view of the pump. If this is not possible, it must
be possible to lock the isolation switch into position with a padlock or similar;
All pipelines and fittings must be able to withstand the maximum pressure that the pump can
provide;
All pipelines must be liquid-tight and in good condition;
The inner diameters of supply, drainage and overflow pipes must be at least as big as that of
the connections. Account should be taken of the total pipeline resistance, so that minimum
pressure, maximum overpressure and pressure losses of pipelines and the like are not
exceeded.
4.2 Assembly
Place the HD pump set in an appropriate place:
o
make sure the surface is stable;
o
make sure the pump is standing horizontally;
o
make sure that vibrations cannot move the pump from where it stands;
o
make sure there is enough free space around the pump;
o
make sure the pump is protected from the weather.
Connect the inlet/suction pipeline:
o
use flexible pipes in connections;
this prevents vibrations splitting or breaking pipelines.
o
use a large enough filter:
maximum degree of filtration 200 microns (for Danfoss, pre-filtration of 10
microns with a ß10 value > 5000);
this prevents small particles and foreign objects from ending up in the pump
and inlet pipelines;
o
make sure the inlet/suction pipe cannot become empty, even partially, when the
pump is not on;
this prevents air entering the inlet/suction pipe;
if the pump runs dry, in other words, contains no liquid, it risks suffering
irreversible damage.
Connect the discharge pipeline:
o
use flexible high-pressure pipes at the connection;
this prevents vibrations breaking pipelines.
o
install a non-adjustable or lockable overpressure protection device.
