Westerbeke 20.0KW sbeg Specifications download pdf (Page 8)

CARBON

MONOXIDE

"CO"/SAFE-CO

GENERATORS

IMPORTANT

INFORMATION

Catalyst performance will degrade over

time.

As

the

generator accumulates operating hours,

CO

concentrations

will increase. The catalyst

MUST be replaced every 5000

bours

of

engine operation

or

earlier if

CO

testing so

indicates.

Verification

of

satisfactory CO levels must he done

seasonally

or

eacb 1,000 hours (which ever occurs first).

Verification

involves

actual

sampling of exhaust

gas

with

an

appropriate CO

analyzer.

There are

two

locations

where

exhaust

gas

can

be

sampled.

Dry,

but

hot,

exhaust can

be

sampled

at

the

plugged

tapped

hole

in the exhaust elbow intended

for

back pressure

measurements. Measurements

at

this

location

may

not

be

practical in all instances due

to

the

high

exhaust

temperature,

temperature limits of the

analyzer,

safety concerns over

temperatures involved

or

the

possibility of

high

levels

of

CO.

The other location

is

the

boat's exhaust outlet,

which

contains entrained cooling water (except

dry

stack exhaust

systems).

Only

analyzers

with

probes should

be

used

at

this

location and it

is

critical that

the

probe

not

ingest

water.

Probe-type analyzers

have

an

air

pump

drawing a

gas

sample

through the

probe.

As

a result,

they

tend to ingest water

when

it

is present. Be sure

to

aim

the

probe downwards

with

the

opening pointed

in

the

direction of

the

water

flow

and

just

out

of

the

flow.

Position

the

analyzer

as

high

as

possible

with

the

tubing leading to

the

probe

running continuously

down-

hiD.

Observe

the

usually translucent

tubing

between

the

probe and

the

analyzer

and

be sure

no

water

is

being

ingested.

If

any

water

is

ingested

into

the

analyzer,

it

must

be

repaired or replaced and recaIibrated.

When

measuring

CO

at

the

exhaust outlet be

aware

of

the

ambient CO level

by

also

measuring

CO

away

from

and

upwind

of

the

exhaust outlet, especially

in

marinas.

the

CO

level

at the exhaust will

be

influenced

upwards

by

the

ambient level.

EXHAUST

MANIFOLD

ADJUSTABLE

ClAMP

INSTAllING

A

NEW

CATALYST

Whenever

taking

the

time

to

verify

proper

CO

concentration

from

the

exhaust

with

a

CO

analyzer,

always

take

the

opportunity

to

use

the

analyzer

to

"sniff'

around

the

engine

lOOking

for

CO

from

exhaust

leaks.

Pay

close attention

to

the

connection of

the

cylinder

head

to

the

exhaust

manifold,

the

exhaust manifold

to

the

water injected exhaust

elbow,

and

all

subsequent downstream exhaust components and

hoses.

Remember,

exhaust

gas

that

has

not

yet

passed

through

the

catalyst

is

raw,

untreated exhaust

and

is

very

high

in

CO

content.

Analyzers usually require periodic calibration. Follow

the

instructions

that

come

with

the

analyzer

very

carefully

regarding calibration.

The following

are

manufacturers

that

offer

CO

analyzers:

Extech,

TIF,

Testa,

TSI,

Bacharach,

Fluke,

Monoxor,

Fyrite,

Zellwgwer Analytics, Industrial Scientific Corp,

GFG,

TPI,

Teledyne

and

others.

Westerbeke

recommends

analyzers

with

a probe connected to

the

analyzer

by

a length

of

transparent

tubing.

They

are

slightly

more

expensive

than

those

with

the

sensor built

into

one

end

of

the

analyzer,

but

they

allow

you

to

sample

the

exhaust coming

out

of

the

boat's exhaust

outlet.

I

POSITION

THE

CLAMP

OVER

THE

TWO

FLANGES

(AND

GASKET)

AND

TIGHTEN

~~~SECURELY

Test

run

unit and verify

no

exhaust leakage.

-.¥'

WESTERBEKE

Engines & Generators

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