Components; Drainage System; Fuel Circuit - Mase MARINE IS 2.5 Manuel D'installation

IS 2.5
2.4.

Components

1 - Direct sea intake 1/2"
IMPORTANT
If the unit is installed more than 1 metre above
the water-line, a check valve should be fitted after
the sea intake (fig. 6, ref. 1) to prevent the water
circuit emptying when the motor is off. If this
empties, the rotor of the water pump might be
damaged during start up; for the same reason,
when the unit is first started up, the suction tube
from the valve to the pump should be filled
manually.
2 - Ball tap (general) 1/2"
3 - Ball tap (drainage) 1/2"
This is used to drain the cooling system of the electric
generator for general maintenance or when a long
period of inactivity is expected.
4 - Water filter (can be inspected)
This must provide efficient protection for the cooling
circuit from the entrance of mud, sand and seaweed.
IMPORTANT
The filter mesh should be very fine. Mesh 2 - 470
micron is recommended, other sizes do not give
good filter performance.
5 - Anti-siphon valve: this valve returns the cooling circuit
to atmospheric pressure when the motor is switched
off, to prevent the siphon phenomenon.
It must be installed when the generator is fitted
with the drainage mixer on or beneath the water
line, and should be positioned at least 50 cm above
water level.(see fig. 8/9)
IMPORTANT
The drainage duct of the anti-siphon valve must
run beneath the valve itself in order to prevent
water accumulating in the duct, which should
always remain empty to allow air to pass through
when the unit is switched off. (see fig. 7)
N.B.: The drainage duct should be taken into the bilge because
during normal operation small quantities of water might be leaked
from the duct.
The box already includes 2 holes to connect the anti-siphon valve
(fig. 9).
GB
2.5.

Drainage system

The flue gas/water drainage system of the generator must
be separate from that of the main motors
The length of the tube from the highest point of
the drain duct to the muffler should not exceed 2
metres. This is to prevent the water left in the
drainage duct returning to the motor after filling
the tank muffler, when the unit is turned off.
1 - Tank muffler (capacity 3.5 litres)
This dampens the noise of the drainage and stops the
water flowing back towards the motor. The muffler
should be installed no less than 1 metre away from the
generator and positioned at a height less than or equal
to that of the base plate of the generator.
2 - Silencer
This further reduces noise. It should be installed no
more than 1 metre from the sea drainage nozzle.
3 - Sea drainage nozzle; It should be installed so that it
is always above the water line.
3.0.

FUEL CIRCUIT

The unit is fed by diesel fuel through the tubes marked
"DIESEL" and "DIESEL RETURN" (fig. 10, ref. 1-2). This
latter is used for the return of the excess fuel. It is
necessary to install a filter in connections to the fuel
tank, it is also advisable to fit a tap onto the power supply
line downstream of the tank and a single-acting valve
(check valve only for a difference in height of 50 cm or
more) to prevent the fuel system emptying for any reason.
Use a valve with a 50 millibar opening.
The fuel pipes should be in hydrocarbon-resistant rubber,
of inner diameter 6 mm.
The unit is fitted with automatic diesel oil
drainage. If manual drainge is necessary, press
the "ON" button and 30 second before set going
The fuel filter must be a "cartridge-type" with a
filtering grade of 5 to 10 micron
GENERATORS
IMPORTANT
IMPORTANT
the unit.
IMPORTANT
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