Westerbeke 12.0KW - 50Hz EDT Installation Manual download pdf (Page 24)

COOLING

SYSTEM

Zinc

Anode

A zinc

anode,

or pencil,

is

located

in

the

raw

water cooling

circuit within the heat

exchanger.

The purpose of

having

the

zinc anode

is

to

sacrifice them

to

electrolysis

action

taking

place

in

the

raw

water cooling circuit,

thereby

reducing the

effects of electrolysis

on

other components of the

system.

The condition of

the

zinc

anode

should

be

checked monthly

and

the

anode cleaned or replaced

as

required.

Spare

anodes

should be carried

on

board.

NEW

REPLACE

REPLACE

ZINC

ANODES

CLEAN

AND

REUSE

NOTE:

Electrolysis action is

the

result

of

each

particular

installation and vessel location; not that

of

the

engine.

If

the

zinc

anodes

need

replacement, hold

the

hex

boss

into

,

which

the

zinc

anode

is

threaded

with

a

wrench

while

loos-

ening

the

anode

with

another

wrench.

This

prevents

the

hex

boss

from

possibly

tearing off

the

exchanger

shell.

After

removing

the

zinc,

note

the

condition of

it.

If

the

zinc

is

in

poor condition, there

are

probably

a lot of

zinc

flakes

within

the

exchanger.

Remove

the

end of

the

heat

exchanger

and

clean

the inside of

all

zinc

debris.

Always

have

a

spare

heat

exchanger

end

gasket

in

case

the

present

one

becomes

dam-

aged

when

removing

the

end

cover.

Replace

the

gasket

(refer

to

your engine model's heat exchanger

end

gasket

part

num-

ber),

O-ring

and

cover,

and

install a

new

zinc

anode.

NOTE:

The

threads

of

the

zinc

anodes

are

pipe

threads

and

do

,not

require

sealant.

Sealant should not

be

used

as

it

may

insulate

the

zinc

from

the

metal

of

the

heat exchanger

hous-

ing

preventing

electrolysis

action

on

the

zinc.

Heat

Exchanger

Service

After approximately

1000

hours

of operation,

remove,

clean

and

pressure test the engine's heat

exchanger.

(A

local

auto-

motive radiator

shop

should

be

able

to

clean

and

test

the

heat

exchanger.)

NOTE:

Operating

in silty

aniJlor

tropical

waters

may

require

that a heat exchanger

cleaning

be

performed

more

often

than

every

lOOO'hours.

DESCRIPTION

AIR

INTAKE

I

SILENCER

A

marine

diesel

engine

running

at 1800 rpm

will

typically

consume

as

much

as

6,000

cubic

feet

of

air per

hour.

Not

only

must

the

engine

room

be

well

ventilated

the

air

flow

. '

mto

the

engine must

be

unrestricted.

AIR

INTAKE

FILTER/SILENCER

The replaceable canister contains a paper element

that

should

be

inspected every

100

operating

hours.

Dirt

in

the

element'

~an

be

shaken

off or cleaned

with

compressed

air,

however,

lf

the

element

is

greasy or black

with

dirt,

the

canister

must

be

replaced,

carry a

spare.

NOTE:

To

operate

efficiently a diesel

engine

must

intake

a

continuous

volwne

of

clear

air.

Hard

starting,

an

erratic

idle,

and black exhaust

smoke

are

all

symptoms

of

a

restricted

air

intake.

FILTER

CARTRIDGE

INSTALLATION

Detach

the

air inlet

hose

from

the

air

intake.

Unplug the

aU:

temperature sensor

from

the

engine harness. Then

remove

the

bolts that secure

the

air intake silencer housing to

the

inlet base .

and

remove

the

housing, screen

facing

out

Reinstall

the

housing

to

the

inlet

base.

Plug

in

the

air temperature sensor to

the harness

and

reconnect

the

air inlet hose.

NOTE:

Regular inlet filter canridge

maintenance

is

essentail

for proper

engine

operation.

Failure

to

maintain

the

inlet

filter

caT!ridge will

result

in

air obstruction

into

the

engine,

causing

poor fuel combustion and

resulting

in

smokey/sooty exhaust

dischatge

alone

with

lube

oil

comsumption

and

possible filter

deterioration

which

could

result

in

internal

engine

damage.

FIlTER

CARTRIDGE

1103970

TURN

OVER

WHEN

INSTALLING

17'

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 65 66

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