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Westerbeke 20.0KW sbeg Specifications Page 7

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CARBON
MONOXIDE
"CO"
ISAFE-CO
GENERATORS
IMPORTANT
INFORMATION
DESCRIPTION
Carbon monoxide "CO"
is
a component
of
engine exhaust.
It
is a colorless, tasteless, odorless, lighter
than
air poisonous
gas
that
can kill you without
any
warning.
CO
poisoning
is
one
of
the major safety risks associated
with
boating.
It
is a
threat that must not be underestimated.
Several standards for
CO have been published, expressed in
parts
per
million "ppm" and hours
of
exposure:
Regulator
CO
ppm
Exposure
Hours
EPA
9 8
ACGm
25 8
EPA
35 1
NIOSH
35 8
OSHA
50 8
ACGm
125 0.5
NIOSH
200
0.0
NIOSH
1200 0.0
(IDLH)
1_
ppm
Is
the
so-called
IDLH
concentration
-
IMllElllAmy
DANGEROUS
TO
UFE
AND
HEALTH.
A city in Califomia characterizes the effect
of
CO
concentration this
way:
Parts
per
Million
Responses
25
Pennissible exposure level, no
apparent
toxic symptoms.
100 No poisoning for long period.
Allowable for several hours.
200
Should
not
be exposed above
this level for any period of
time. A possible mild frontal
headache in two to three hours.
Even though Westerbeke
Safe·CO generators are designed
to
reduce normal levels
of
CO in the engine exhaust
by
approximately 99%,
an
exhaust leak of untreated exhaust
would be extremely dangerous. For this reason it
is
extremely important
to
install a CO detector near the
generator and
to
be sure it
is
always turned on and
functioning properly.
If
this detector sounds,
do
not
turn
it
off,
assuming it is a false signal.
You
can
not
taste, smell, or
otherwise detect
CO.
Leave the detector on, turn off
all
engines and generators, evacuate the boat leaving ports and
hatches
open, and seek professional
help.
As
soon as CO leaves the exhaust outlet, the level is subject
to dilution in the open
air.
The closer a person
is
to
the
exhaust outlet,
the
higher
the
concentration of
CO.
In
a closed space, such
as
the engine compartment,
the
boat,
or underneath a stem swim platform, concentrations will
potentially rise
to
the
undiluted level emanating from the
exhaust system due
to
a lack
of
fresh air
to
dilute the exhaust
gas. Therefore, one should never rely
on
dilution
of
the
exhaust
to
provide a margin
of
safety.
Westerbeke
Safe·CO generators achieve
an
approximate
99%
reduction of typical
CO
by
precise control control
of
the
engine's air/fuel ration coupled with after treatment
in
a
special catalyst.
CO emissions are not the same for every
model because each engine
is
different. Also, certain
fuel
system components are commonized across several engine
models being adequate for some and extra·adequate for
others,
thus
producing different
CO
levels
for
different
models.
The
fuel
system which accomplishes the required precise
air/fuel ratio control is comprised of many different
components: purchased sub·assemblies, machined castings,
sensors, electronics and others. Because
of
the
extreme level
of
CO reduction,
any
variability
in
the functioning
of
any
these components can
and
will cause variability
of
the
CO
output.
CO
concentration also varies with load. Usually, but
not
always, the worst case CO concentration occurs at maximum
load.
INSPECTION
The catalyst is critical
to
optimizing CO levels.
Any
water
intrusion into the exhaust system will likely quickly
compromise the proper operation of the catalyst.
Westerbeke's exhaust system installation instructions dated
on or after February
2004 must be adhered
to.
NOTE:
Water
intrusion
is
not a product deject and
is
nof
covered under warranty. neither
Westerbeke~
nonnal
product warranty nor
the
emissions specific warranty
mandated
by
various regulating authorities
such
as
EPA
andCARB.
Maintenance
of
any
components affecting
the
flow
of
air or
the
flow
of
fuel
to
the engine is critically important, such
as
fuel
filters
and
air filters (if any).
Inspection
of
the
catalyst at the prescribed intervals
is
critically important. The exhaust elbow
is
removed
by
loosening the metal clamp
to
provide a view of
the
output
surface
of
the catalyst.
Any
visual irregularity
of
the
normal
flush,
honeycomb appearance
is
most likely a result of water
intrusion. The cause
of
the irregularity must be identified and
addressed.
If
there
is
irregularity, the catalyst and gasket must
be
replaced. Upon careful reassembly
of
the
catalyst, exhaust
elbow gasket,
and
exhaust elbow, check for the presence of
CO
while the engine is running. This must be performed with
a
CO analyzer.
Engines & Generators
iv
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