Cooling System - Westerbeke 5.5 kw EDC 60 HZ Operator's Manual

COOLING SYSTEM
DESCRIPTION
Westerbeke marine diesel engines are designed and equipped
for fresh water cooling. Heat produced mille engine by com-
bustion and friction is transferred to fresh water coolant
which circulates throughout the engine. This circulating fresh
water coolant cools the engine block, its internal moving
parts, and the engine oil. The heat is transferred externally
from the fresh water co01ant to raw water by means of a heat
exchanger, similar in function to an automotive radiator. Raw
water flows through the tubes of the heat exchanger while
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INCOMING RAW
COOLING CIRCUIT
DIAGRAM (TYPICAL)
FRESH WATER
¢
RAW WATER . .
--.
fresh water coo hint flows around the tubes; engine heat trat]s-
ferred to the fresh water coolant is conducted through the
tube walls
to
the raw water which is then pumped 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 within the engine
allows the cooling water passages to stay clean and free from
harmful deposits.
NOTE: AN ANTI-SIPHON
VALVE MAY BE REQUIRED
HEAT
EXCHANGER
FRESH WATER
DRAIN
WATER DRAIN
..... WESTERBEKE
Engines & Generators
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