Installation manual
DC
CIRCUIT
/BATTERY
DESCRIPTION
The
DC
Circuit functions to start, operate and stop the
generator's engine. The circuit is best understood by
reviewing the DC Wiring Diagram and Wiring Schematic.
The engine's DC wiring is designed with three simple basic
circuits: start, run, and stop.
The engine has a 12 volt
DC
electrical control circuit that is
shown on the Wiring Diagrams. Refer to these diagrams
when troubleshooting or when servicing the DC electrical
system on the engine.
A
CAUTION:
To
avoid
damage
to
the
battery
charging
circuit,
never
shut
off
the
engine
battery
switch
while
the
engine
is
running.
Shut
off
the
engine
battery
switch,
however,
to
avoid
electrical
shorts
when
working
on
the
engine's
electrical
circuit.
Specifications
The minimum recommended capacity
of
the dedicated battery
used
in the engine's 12 volt
DC
control circuit is 600-900 CCA.
Battery
Charging
Circuit
The engine supplies a continuous 6 amp charge from the
voltage regulator to the engine's battery. This charge passes
thru an 8 amp fuse (and the ships battery switch).
Testing
the
Circuit
If
the battery is not charging, check the fuse.
To
test the
circuit, remove the fuse and test with a voltmeter between the
fuse holder connection and ground. With the engine running,
it should indicate 13-14 volts.
If
only battery voltage is
indicated, check the terminal connections at the battery.
Battery
Maintenance
Review the manufacturer's recommendations and then
establish a systematic maintenance schedule for your
engine's starting batteries and house batteries.
• Check the electrolyte level and specific gravity with a
hydrometer.
• Use only distilled water to bring electrolytes to a proper
level.
• Make certain that battery cable connections are clean and
tight to the battery posts (and to your engine).
• Keep your batteries clean and free
of
corrosion.
SHORE
POWER
TRANSFER
SWITCH
If
the installer connects shore power to the vessel's AC
circuit, this must be done
by
means
of
the Shore Power
Transfer
Switch. Set the transfer switch shown in the
diagrams to the
OFF
position. This switch prevents
simultaneous connection
of
shore power to generator output.
Generator
~.
SINGLE
LINE
120
VOLT
SYSTEM
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Ground
I"
equipment.
z
.".'
(GRN)
~
Shore
Power
Shore Power Transfer Switches are available from your
WESTERBEKE dealer.
A
CAUTION:
Damage
to
the
generator
can
result
if
utility
shore
power
and
generator
output
are
connected
at
the
same
time.
This
type
of
generator
damage
is
not
.
covered
under
the
warranty;
it
is
the
installer's
responsibility
to
make
sure
all
AC
connections
are
correct.
enerato1"
Ground
N
L1
1j
Generator/Shore
.!l
Switch
III
...
-,
" ,
, ,
,
~L1
r----r------~:J
2,
,
.-
,_
...
'-:-(NCO"e-u-tr-'al~)
+-,
/(o;)-~
N
,-------\-(77J
0':
, '
... _
...
l
L1
N J
r
Shore
Power
_
Shore
-
Ground
Shlp-To-Shore
Switch
Shlp's
LOAD
Shlp's
Ground
230
VOLT/50
HERTZ
lWO
WIRE
CONFIGURATION
SYSTEM
Engines
& Generators
19