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ventilation
The
generator
set needs
fresh
cool
air
for
combustion
within
the
engine cylinders, for generator cooling and to remove harmful or flam-
mable gasoline fumes from around the generator set.
The 9 KW BTG en-
gine requires air flow of 32 cubic feet per minute (0.906 cubic meters
per minute) and the generator end
requires from 225 to 250 cubic feet
per minute (6.37 to 7.08 cubic meters per minute) air flow.
NOTE:
Heated generator discharge air should not be allowed
to accumulate in
the generator compartment.
It should be
removed to prevent recirculation through the generator.
Exhaust System
WARNING
Exhaust gas is deadlY1
the exhaust system must be tight and
free of leaks.
All exhaust systems must be configured to prevent the entry of water
into the engine exhaust manifold and cylinders while the vessel is
under power or sail, heeling, from following seas, when backing down
or any other conditions.
General tips on exhaust system:
•
Dry portions of exhaust system,
between the engine and cooling
water injection point, must be properly insulated.
•
The exhaust hose must be of adequate size and minimal run to help
prevent excessive back pressure.
The use of fittings and elbows
should be limited as these create back pressure.
•
The
gener ator
exhaust
system
~
be
separate
from
any
other
engine exhaust system.
•
Dry stack type exhaust systems
~
be flexibly attached to the
engine manifold, be properly supported, have a spark arrestor and
be protected against water entry.
•
Hydro hush mufflers should be mounted as close to the generator as
possible and the exhaust/cooling water mixture from the exhaust/
water injected elbow should drop down into the muffler.
•
units
installed
with
exhaust
manifolds
close
to
or
below
vessel
water
line
must
have
anti-siphon
protection
in
the
water plumbing to the exhaust/water injected elbow.
8
the
sea
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