Westerbeke 20B TWO Instalační manuál stáhnout pdf (Strana 21)

ENGINE

COOLING

SYSTEM

DESCRIPTION

Westcrbeke marine diesel gen.erators are designed and

equipped for fresh water cooling. Heat produced

the

engine

combustion and friction is transferred to fresh

water coolant which circulates throughout the engine. This

circulating fresh water coolant cools the engine block and its

internal

nmving parts.

The

heat is transferred externally from

the fresh water coolant to raw water by means

a heat

exchanger; similar

in function to an automotive radiator. Raw

water flows through the tubes

the heat exchanger while

fresh water coolant flows around the tubes; engine heat trans-

ferred to the fresh water coolant is conducted through the

tube

wa1ls

to the raw water which is then pumped into the

EXHAUST

ELBOW

EXHAUST

/-.......____,

"-.....

TYPICAL

ASSEMBLY

COOLING

CIRCUIT

DIAGRAM

FRESH

WATER

RAWWATER

exhaust system where finally

is discharged overboard. In

other words, the engine

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

each other. Using only fresh water coolant within the engine

allows the cooling water passages to stay clean and free from

harmful deposits.

NOTE:

Refer to ENGINE

COOLANT

paragraphs in this sec-

tion for the recommended antifreeze and water mixture to

used as the fresh water coolant

and

for information

filling

the fresh water system.

NOTE:

KEEP

PASSAGE

THROUGH

THE

MANIFOLD

CLEAR

PIPE

CLEANER

WORKS

WELL).

NOTE:

ANTI-SIPHON

VALVE

MAY

REQUIRED

RAW

WATER

DRAIN

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 71 72

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