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5. Mechanical installation
WARNING
Crushing of hands
Death or serious personal injury
‐
All pipes must be supported.
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Supports for pipes and components must guarantee
the stability over time and have mechanical
characteristics such as withstanding static and
dynamic loads, as well as vibrations of the pump
set during its operation.
Do not step or walk on the components of the pump sets.
Do not place other parts or equipment on the pump set
components.
Installations in territories with seismic characteristics must
also be carefully evaluated.
Pos.
Description
1.
Cable for earth connection
Earth connection
The fuel tank can, if necessary, be removed from the motor frame.
In this case, make sure that the tank is positioned on the same
foundation as the engine, or at least to the same height, to ensure
that the fuel feeds the injection pump by gravity.
The pipes connected to the pump set must be of adequate size
and the inlet pipes must comply with the criteria listed in the EN
12845 standard regarding the water speed in the pipes (1.8 m/s for
positive head installation and 1.5 m/s for suction-lift installation).
Special attention must be paid to choosing components and the
path of the inlet pipes which must ensure that
the available NPSH at the pump inlet port is at least 1 m greater
than the required NPSH, at the maximum flow rate required.
The design and execution of the supports of the pump
set must be properly carried out in accordance with the
relevant standards and regulations by specialists
commissioned by the client.
Incorrect or not lasting supports may cause serious
damage to the fire pump set or even to the system.
The pump set is supplied in pre-assembled blocks which need to be
assembled before performing any operation.
The pump set must be placed on a flat and smooth surface, for
example, on a solid floor or a concrete foundation.
The control panel of the diesel pump must be detached from the
motor frame and fixed to the ground in order to
avoid the propagation of vibrations to the electrical components.
A robust electrical earth connection between the engine frame and
the control panel stand must be made with a cable with
a large cross-section (equal to or larger than that of the delivered
cable) or a metal braid.
1
Always prevent the inlet pipe from having a reverse gradient that
results in a drain-trap effect.
If the inlet pipe fails to deliver the liquid to the pump in
this condition, it can lead to noisy operation, swirling of liquid
around the suspended pump , premature bearing failure
and cavitation damage to the impeller and inlet of the casing.
Installation of pipe supports is always required on the outlet and
inlet side of the pump set according to the requirements of the EN
12845 standard so that the weight of the pipes do not rest on
the outlet manifold (and on the inlet manifold, if present) or on the
pumps.
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