Installation; Cooling Water Circuit - Mase Generators IS 7.6 Installation Manual

2. Recommendations for safety during installation
and setup
- The personnel in charge of installation and initial
starting of the generator must always wear safety
glasses and protective gloves.
- Do not leave disassembled parts, tools, materials,
etc. on or near the engine.
- Never leave flammable liquids or cloths soaked in
flammable liquids in proximity of the generator,
near electric equipment (including lamps) or parts
of the electrical system.
- Take precautions to prevent the danger of
electrocution.
- Check that the grounding system is installed and
constructed in accordance with ABYC regulations.

3. INSTALLATION

3.1 Space requirements
The generator must be installed in a ventilated space,
supplying sufficient air necessary for the combustion of
the motor.
The space must be separate and acoustically insulated
from living areas.
The generator should be positioned so normal mainte-
nance operations can easily be performed.
3.2 Fastening the unit
To fasten the unit securely, a base should be installed to
absorb vibrations and support the weight.
Drill holes in the base according to the instructions in
fig. 1.
3.3 Ventilation
The generator is equipped with an internal forced cool-
ing system through a water/air exchanger.
The air needed for combustion is taken in through the
opening on the base (fig. 2) so care must be taken to
ensure that this opening is always free.

4. COOLING WATER CIRCUIT

The engine of the IS7.6 is cooled by a closed circuit heat
exchanger.
Upon installation, a raw water feed circuit and wet
exhaust system should be fitted for cooling.
4.1 Raw water feed system
Boats usually use one of two systems to collect water
(fig. 3):
1 - Direct infeed system
2 - System with baffle
Mase recommends the direct infeed system (ref.1 fig. 3)
since this system prevents over pressurization of the
system.
Do not apply any type of external
sea strainer to the direct feed system.
The baffle system might cause the following problems:
a - If it is installed with the slots facing the bow:
In this case, during navigation and with the electric
generator off, pressure is accumulated in the water
infeed duct which might cause the system to fill up,
even as far as the exhaust port, allowing water to
enter the cylinders.
b - If it is installed with the slots facing the stern:
In this case a depression might accumulate in the
water infeed duct during navigation, preventing the
water pump from starting up the cooling plant, or
limiting the capacity and subsequently causing the
electric generator to overheat.
4.2 Typical installation with electric generator
above the water-line (fig. 4)
1 Raw water intake
2 Intake valve
3 Drain valve
4 Water filter
5 Electric generator
6 Barrel muffler
7 Silencer
8 Exhaust through-hull
9 Water line
A - Hose - internal diameter 50 mm (1.96")
B - Hose - internal diameter 15 mm (.59")
C - Clamps
D - Hose - internal diameter 50 mm (1.96")
The measurements shown in fig.
4-5 should correspond exactly.
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