Westerbeke 46 Manual del operador descargar pdf (Pagina 20)

COOLING

SYSTEM

1.

Cooling

water

As

cooling

water,

use

soft

water

with

least

impurity

content

such

as

tap

water

(potable

water)

or

rainwater,

and

never

use

hard

water

or

foul

water.

Use

of

hard

water

or

water

containing

much

impurity

will

lead

to

collection

of

scale

in

the

engine

and

heat

exchanger

with

resultant

decline

in

cooling

effects.

2.

Antifreeze

In

cold

districts,

care

should

be

taken

to

prevent

cooling

water

from

freezing.

Cooling

water,

when

frozen,

expands

to

break

the

heat

exchanger

and

the

cylinder

block,

and

it

is

essential

that

antifreeze

be

added

to

cooling

water

in

a

quantity

proportional

to

the

lowest

temperature

of

the

district.

It

is

recommended

that

the

antifreeze

mixture

be

used

throughout

the

year.

*Antifreeze

of

poor

will

cause

corrosion

antifreeze

prepared

by

quality

or

without

rust

inhibitor

of

the

cooling

system.

Always

use

a

reliable

maker.

*Make

sure

that

the

cooling

system

of

the

engine

is

cleaned

well

before

adding

antifreeze.

*Recommended

antifreeze

for

year

round

use

is

ZEREX

or

PRESTONE

with

rust

inhibitor.

*Thoroughly

mix

the

antifreeze

and

water

before

adding

to

the

cooling

system.

ANTIFREEZE ADDITION

DATA

Antifreeze

Concentration

%

13

23

30 35

45

50

60

Freezing

temperature

·C

( •

F)

-5

(23

)

-10

(14)

-15

(5)

-20

(-4)

-30

(-22)

-40

(-40

)

-50

(-58

)

Note:

It

is

advisable

that

selected

on

the

basis

of

5·C

(lO·F)

lower

than

perature

expected.

3.

Fresh

water

cooling

system

antifreeze

concentration

be

a

temperature

which

is

about

the

actual

atmospheric

tem-

The

system

consists

of

a

sea

water

pump

which

pumps

raw

sea

water

through

a

heat

exchanger

to

remove

heat

from

the

coolant.

The

raw

water

is

discharged

overboard

through

the

exhaust

line.

The

engine

coolant

(fresh

water

with

or

without

antifreeze)

is

circulated

by

the

fresh

water

pump

in

continuous

circuit,

pumped

through

the

cylinder

block,

cylinder

head,

heat

exchanger

and

back

to

the

fresh

water

pump.

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