2
2
The recommendations given in this chapter do not
cover all the installation possibilities, but offer recom-
mendations and guidelines for installing a Nanni Diesel
generating set. Certain equipment may not be part of
your order or installation.
Installation
The generating set and the coupled equipment must
be accessible for maintenance work. The generating
set must be mounted on a rigid and solid structure on
the hull that is capable of withstanding all the dynamic
stresses and the weight of the set as a whole. The gen-
erating set must not be inclined by more than 5° when
the craft is stopped.
Avoid installing the generating set too close to walls that
are too thin that could reverberate. In all cases, the gen-
erating set should not be installed directly on a wood or
plywood surface or in contact with walls. A solid steel
support will reduce the vibrations and noise produced
by the generating set.
The various cables and electrical extension sections
must be securely affixed to the generating set and/or
to the compartment walls (do not let them hang in the
hold).
Ventilation
The temperature inside the compartment must not ex-
ceed 50°C with a maximum difference of 20°C in rela-
tion to the ambient temperature.
For slow craft, ventilation must be provided by a fan.
Fresh air must circulate from front to back. The air in-
take should be situated at the bottom front of the engine
compartment and the exhaust at the top back in order
to ensure optimal air circulation.
Electrical installation
An incorrect or faulty electrical installation could cause
leakage currents that could affect the galvanic protec-
tion of the generating set and consequently the gener-
ating set itself. The installer should ensure that all the
necessary precautions are taken to guarantee the cor-
rosion protection of the generating set.
Fuel feed system
The generating set must have its own fuel feed system.
The tanks must be placed as far as possible at the same
height as or slightly higher than the engine.
The fuel return pipe must always be situated under the
minimum tank fill level.
The maximum height between the fuel pump and the
minimum tank level is of 0.5 m. An electrical pump must
be installed above this value.
Cooling system
Your generating set is cooled by a coolant passing
through the different parts of the engine. It may also be
fitted with a heat exchanger cooled by seawater which,
among other things, cools the coolant and the exhaust
gases (except in the case of a Keel Cooling system).
In this case, the generating set must have its own sea-
water cooling system with no connection to the engine
system or other equipment. The seawater intake must
always face the back of the craft (regardless of the type
of craft) and must be as close as possible to the genset.
The height of the seawater filter and the exhaust outlet
must be 150 mm above the waterline.
An anti-siphon must always be installed if the generat-
ing set is below the waterline. It should be placed at
least 500 mm and at most 2 metres above the waterline.
The waterlock box must be positioned as close to the
engine and as low as possible.
The exhaust pipe situated between the waterlock and
the hull outlet should form a gooseneck (as shown in
the diagrams below). The highest point of the goose-
neck should be at a maximum distance of 3 metres from
the waterlock and at a maximum height of 1.5 metres in
relation to the waterlock.
Installation recommendations
