Westerbeke BCD 4.4KW Manual do Operador descarregar pdf (Página 26)

Dry stack-type exhaust systems

(shown to the right) must

be

at-

tached to the generator engine's

ex-

haust

manifold by

means

of a flexible

connector

pipe.

This

system

must

be

properly supported

and

insulated

to

prevent water from entering into the

engine's cylinders.

Provisions

must

be made

for

discharging

the

engine's cooling

sea

water.

Exhaust System Failures

P"L"PP~R

CDVE"

~

i I

DRY

STACK

EXHAUST

When

the engine's

sea

water

is

fed

into

an

exhaust

system

so

that the

full

stream

of this water strikes a

sur-

face,

erosion

takes

place.

This

erosion

may

cause

premature

failures.

The

proper design of either a

water

jacketed or water injected

''Wet''

exhaust

system

to

prevent

this problem requires that the

sea

water inlet

be

positioned

so

that the entering

stream

of

sea

water does not directly strike a

surface.

In

addition, the velocity

of the entering

sea

water

stream

should

be

as

low

as

possible, which

can

be

achieved

by

having

inlet fittings

as

big

in

diameter

as

possible.

The

best

protection against carbon monoxide poisoning

is

a daily inspection of the complete

exhaust

sys-

tem.

Check for

leaks

around

manifolds,

gaskets,

and

welds.

Make

sure

exhaust lines

are

not heating

sur-

rounding

areas

excessively.

If

excessive

heat

is

present,

correct the situation immediately. If

you

notice a

change

in

the

sound

or appearance of

the

exhaust

system,

shut

down

the

unit immediately

and

have

the

sys-

tem inspected

and

repaired

at

once

by

a qualified

mechanic.

Make

sure

there

are

no

unnecessary objects

suspended

from any portion of the exhaust

lines.

Excessive

weight could

cause

deflection or distortion of the

lines,

resulting

in

damage or

leaks.

Inspect

insulated

por-

tions of the

exhaust

system

to

make

sure

there

is

no

deterioration of

the

insulation.

NOTE:

A

maximum

of 8

Ibs

can

be

attached to the

exhaust

manifold without support.

CAUTION

Prolonged cranking intervals without

the

engine

starting

can

result

in

filling the engine-mounted

exhaust

system

with

sea

water coolant.

This

may

happen

because

the

sea

water pump

is

pumping

sea

water through the

sea

water cooling

system

during cranking.

This

sea

water

can

enter the engine's cylinders by way of

the

exhaust

manifold once the exhaust

system

fills.

Prevent

this from happening by closing the

sea

water supply through-hull shut-off, drain the

exhaust

muffler,

and

correct the

cause

for the

excessive

engine

cranking

needed

to obtain a

start.

Engine

damage

resulting

from

this type of

sea

water entry

is

not a warrantable

issue;

the

owner/operator

should

keep

this

in

mind.

23

Westerbeke Generators

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