SERVICE BULLETIN V.9
DATE:
April 4,
1983
BULLETIN
NUMBER:
87
MODEL:
All
Marine
Engines
SUBJECT: Alternator
Output
Splitter
PIN:
GENERAL
DESCRIPTION:
The
splitter
is
a solid
state
device
which
allows
two
batteries
to
be
recharged
and
brought to the
same
ultimate voltage
from
a single
alternator
as
large
as
120
amp
and,
at
the
same
time, iso-
lates
each
battery
so
that
discharging
one
will
have
no
effect
on
the
other.
Charging
rates are in proportion to the
batteries'
voltage
(state
of discharge).
This
method
precludes the necessity,
and
even
the desira-
bility
of a rotary switch for selecting
which
battery
is
to
be
charged.
It
also assures
that
ships services cannot drain the engine
starting
battery.
INSTALLATION:
1.
Mount
splitter
on
a
metal
surface other than the engine, preferably
in
an
air
stream
if
available.
Do
not
install
near engine exhaust
system.
Install
with cooling fins aligned
vertically.
2.
Be
sure to
use
a wire size appropriate to the output of the associated
alternator.
In
full
power
systems
number
4 wire
is
recommended
from
the
alternator
to the
splitter
and
from
the
splitter
to the
batteries.
3.
Connect
the
alternator
output terminal to the center
splitter
terminal.
4.
Connect
one
splitter
side terminal to
one
battery (s)
..
5.
Connect
the other
splitter
side terminal to the other
battery(s).
6.
When
the
splitter
is
installed,
both
batteries
will see a charging
voltage
8/10 volts less than usual.
This
voltage
drop
can
be
regained,
if
desired,
by
connecting the regulator wire
directly
to the
alternator
output terminal instead of the regulator terminal.
TEST
INFORMATION:
When
the engine
is
not running, the side
splitter
ter-
minals should read the voltage of the respective battery.
The
center
splitter
should read zero voltage.
With
the engine running
and
alternator
charging, the side
splitter
ter-
minals should read the
same
voltage
which
should
be
the voltage of the
regulator or
somewhat
less.
The
center
splitter
terminal should read .82
volts higher than the readings of the side terminals.
20745
Continued
...
J. H. WESTERBEKE CORP.
AI/ON
INDueTRIAL
,.AR/(,
AI/ON,
MAee.
02322·,ef7}
5
••
-7700
CA.L~;
WtEeTCOR,.,
AI/ON·
T~L~1C:
.2-4444
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