and set-up. Mase IS 27-31, IS 24-28, IS 18-23, IS 21-24.5

I.S. 18 / 21 / 24 / 27 50

Hz

GB

2 PRESCRIPTIONS FOR SAFETY DURING

INSTALLATION AND SET-UP

- The personnel in charge of installation and starting of the generator must always wear a protective helmet; wear safety shoes and overalls.

- Use protective gloves.

- Do not leave disassembled parts, tools or anything else not forming part of the system on or near the engine.

- Never leave inflammable liquids or cloths soaked in inflammable liquids in proximity of the generator, near electric equipment (including lamps) or parts of the electrical system.

- Take the necessary precautions to prevent the danger of electrocution.

3 INSTALLATION

3.1 Housing characteristics

The generator must be installed in a sufficiently ventilated room able to guarantee the small amount of air necessary for engine combustion.

The room must be acoustically separated and isolated from the living quarters.

The generator must be positioned in such a way as to facilitate routine maintenance operations.

Installation in the propulsion engine room is advisable provided that it conforms to the above mentioned conditions.

3.2 Generator anchorage

To fix the generator, arrange for a base to support the weight and vibrations.

Drill holes in the base as shown in Fig.1.

3.3 Ventilation

The generator is equipped with an internal forced cooling system by means of a water/air exchanger.

The quantity of air required for combustion is sucked in through the air intake on the base (Fig. 2): Therefore, always check that this intake is free of any obstruction.

4 COOLING WATER CIRCUIT

The generator engine is cooled by a closed-circuit system with heat exchanger.

During installation a seawater feed circuit must be set up for cooling and an exhaust system for the combustion gas and water mixture.

4.1 Seawater feed system

Normally two types of water intake systems are adopted on boats (Fig. 3).

1 - Direct intake system

2 - System with baffle

MASE recommends the direct intake system (Fig.3,

Ref.1) as it prevents inflow of pressurised water into the intake ducts, instead generating a vacuum which the pressure head of the the generator water pump can easily override.

Do not fit any type of protection cap on the direct intake system.

The system with baffle may cause the following problems: a - If mounted with the slots facing the bow: In this case during navigation and with the generator off, pressure is created in the water intake duct, which may cause the system to fill until reaching the exhaust ports and hence water may enter the cylinders.

b - If mounted with the slots facing the stern:

In this case during navigation a vacuum may be created in the water intake duct such as to prevent the water pump from activating the cooling system or such as to limit the throughput with consequent overheating of the generator.

4.2.1 Typical installation with generator above the waterline (fig.4)

1 Sea exhaust

2 Silencer

3 Exhaust

4 Water filter

5 Main system tap

6 Sea intake

7 Drain tap

A - Pipes - inner diameter Ø75 mm.

B - Pipes - inner diameter Ø25 mm.

C - Pipes - inner diameter Ø16 mm.

GB

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