Installation manual
ENGINE
COOLING
CIRCUIT
OEseRIPTION
Weslerbeke marine
diesel
generators are designed
and
¢quipped
for
fresh water cooling.
Heal
produced
in
the
¢ngine
by
combustion
and
friction
is
transferred
to
fresh
water coolant which circulates throughout the engine.
This
. ¢irculating fresh water
coolant
cools
the
engine block
and
its
internal
meving parts.
The
heat
is
transferred externally
from
the
fresh
water coolant
to
raw
water
by
means of a heat
¢xchanger; similar in
function
to
an
automotive
radiator.
Raw
water
flows
through
the
tubes
of
the
heat
exchanger while
wesh water coolant
flows
around
the
tubes; engine heat trans-
~erred
to
the fresh water
coolant
is
conducted through
Ihe
tube walls
to
the raw
water
which
is
then
pump~d
into
the
-""'.
''-......
..
,
exhaust
system where
finally
it
is
discharged
overboard.
In
other
words,
the engine
is
cooled by
fresh
water coolant, this
coolant
is
cooled by
raw
water,
and
the
raw
water carries the
transferred
heat overboard through
the
exhaust
system.
The
.
fresh
water coolant
and
raw
water
circuits
are
independent
of
each
other.
Using
only
fresh
water coolant wilhin the engine
allows
the
cooling water passages
10
slay
Clean
and free from
harmful
deposits.
NOTE:
Refer
to
ENGINE
COOLANT paragraphs in this sec-
tion
for
the
recommended
antifreeze
and
water
mixture to be
used'as
the
fresh
water
coolant
and
for
information on filling
the
fresh
water
system.
----
..
--.....:..
..
----.
EXHAUST
TYPICAL
ASSEMBLY
COOLING
CIRCUIT
DIAGRAM
FRESH
WATERy
RAW
WATER
*
'-
...
WESTERBEICE
Engines
&
Generators
15
NOTE:
AN
ANTI·SIPHON
VALVE
MAY
BE
REQUIRED
HEAT
EXCHANGER
FRESH
WATER
DRAIN
DRAIN