Generator Caracteristic; General Caracteristic; Cooling System; Control Panel - Yanmar I.S. 6.5 - I.S. 7.6 Manuel D'instructions Et D'entretien

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2. GENERATOR CARACTERISTIC

2.1 General caracteristic

The IS 6.5 and IS 7.6 generators were designed for easy
installation on boats.
The soundproof casing, obtained with insulated, painted
marine aluminium panels, allows easy access to the
engine and the alternator for maintenance and inspection
operations, and at the same time strongly reduces
noise.
The 4-stroke, direct-injection, diesel engine, built by
Yanmar, is extremely reliable and robust. Exhaust
emission is in conformity with CARB regulations.
The alternator is a synchronous, 4-pole brushless type,
and is fitted with two excitation capacitors. The high
pickup capacity of the alternator makes the generator
particularly suitable for the power supply of electric
motors of air conditioners, desalination plants,
compressors, etc.
The generator has a local control panel [Fig. 3 Ref. 4] on
which the controls and control instruments are housed.

2.2 Cooling system

The generator engine is cooled by closed-circuit circulation
of coolant which yields heat to the seawater by means of
a heat exchanger [Fig. 3, Ref. 20].
This heat exchanger built of cupronickel was specially
designed by mase to make the engine suitable for use
at sea.
A second heat exchanger cools the air inside the
soundproof casing and the air necessary for alternator
ventilation.
At the time of installation a seawater feed circuit for
cooling must be installed and an exhaust system to
convey the combustion gas and the water used for
cooling to the outside, as indicate in the installation
manual.

2.3 Control panel

A control panel is positioned on the generator for running
checks and to start and stop the generator. An engine
protection module [Fig. 4 Ref. 5] controls the generator
protections, stopping the engine in case of a fault and
signalling the fault detected by means of special warning
lights.
- Green "RUN" pilot light [Fig. 4 Ref. 6], when on,
indicates that the generator is running and no operating
fault has been detected.
- Red "BATT" pilot light [Fig. 4 Ref. 9), when on,
indicates that the alternator battery charger is faulty.
- Red "OIL" pilot light [Fig. 4 Ref. 7], when on, indicates
that the engine oil pressure is insufficient.
- Red [Fig. 4 Ref. 10] pilot light, when on, indicates
GB
that the temperature of the coolant or the water
circulating in the heat exchangers is too high.
- Red [Fig. 4 Ref. 8] pilot light, when on, indicates that
the alternator windings have reached too high
temperatures.
- Yellow [Fig.4, Ref.11] pilot ligh,when on, indicates
that the glow plugs are active.
The following may also be found on the control panel:
- A bipolar magnetothermal switch [Fig. 4 Ref. 2]
which cuts the power in case of an overload or short-
circuit.
- A thermal switch (Fig. 4 Ref. 3] to protect the low-
voltage electric system against short-circuit.
- An hour counter (Fig. 4 Ref. 1].
- The generator start/stop button [Fig. 4 Ref. 4].
The generator can be connected with a connector to the
remote starting panel, supplied by mase as an optional,
and can be installed on the dashboard.
Two different remote starting panels are available as
shown in Fig. 5.
The most simple version has a start/stop button [Fig. 5
Ref. 1] and a green pilot light [Fig. 5 Ref. 2] which, when
on, indicates that the generator is running.
The second version of the remote starting panel [Fig. 5
Ref. 3] has, in addition to the start/stop button, an
instrument which indicates the engine oil pressure value
(Fig. 5 Ref. 4] and an instrument which indicates the
coolant temperature value [Fig. 5, Ref. 5].
When carrying out maintenance
operations on the generator, disconnect the negative
pole of the starter battery to prevent accidental
starting.
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IS 6.5 - 7.6