8.10 ENGINE COOLING SYSTEM

The engine and generator cooling fluid is sea water circulated by the engine inner pumps, by means of special water intake.

The sucked water flows through the strainers, is delivered to the engines, gearboxes, heat exchangers and is finally drained overboard.

In case of engine room flooding, it is possible to use this system to suck water from the bilge in large quantity proceeding as indicated at paragraph “Engines suction with bilge emergency”.

When required, turn the valves completely and never to intermediate positions.

CAUTION

When the bilge is nearly dry, remember to turn the valves back to sea water intake position, in order to avoid engine damages.

WARNING

Before opening the sea cock strainer for cleaning, remember to close the cut-OFF valve in the hull.
If the yacht is not used, close as a precaution, all cut-OFF valves of the sea cocks; as soon as the yacht is reused, remember to open them.

WARNING

Avoid prolonged use of engines at low speeds to avoid overheating of the exhaust pipes due to reduced cooling water circulation.

This yacht is equipped with a Trailing Pump on the gearbox module; this system allows navigation with a single engine while safeguarding the mechanical components of the engine switched off. For long distances a “sea water” cooling circuit has been provided with the following modes of use.

For prolonged navigation with one of the two engines switched off, operate as follows:

• With both engines working, the 3-way valves, positioned between the engine and the inverter, must be kept in configuration ”A” (no partialization of the water flow towards the other inverter);
• If one of the two engines shuts down or fails (engine OFF), the corresponding valve must be set to position “B” (the inverter now receives part of the cooling water from the operating gearbox flow).