Service manual
GENERATOR
CONTROL
PANEL
SWITCHES
DESCRIPTION
This manually controlled series
ofWESTERBEKE
marine
diesel generators is equipped with toggle switches on the
engine control panel and, optionally,
at
remote panels. The
following instructions and methods
of
correcting minor prob-
lems apply only to such toggle switch controls.
All three switches are momentary contact type and serve the
following functions:
1.
PREHEAT:
The PREHEAT toggle switch is a double pole,
single throw switch. The switch serves two purposes: pre-
heating the engine for easy starting and defeating
of
bypassing the engine oil pressure switch. The defeat func-
tion turns on the fuel solenoid, instrument power and
alternator excitation.
When the PREHEAT switch is depressed, the voltmeter,
panel lights, gauges and meters and fuel solenoid will
activate. The PREHEAT switch should be depressed for
twenty seconds.
2.
STOP:
The STOP toggle switch is a single pole, single
throw, normally closed switch.
The
switch provides
power to the fuel solenoid, instrument cluster and alterna-
tor excitation, after the oil pressure switch has closed
upon starting. Opening
of
this switch opens the power
circuit to the fuel solenoid, stopping the flow
of
fuel to
the engine and shuts down the engine.
To
stop the engine, depress the STOP switch. When the
STOP switch is depressed, the power feed to the fuel
solenoid is opened, and the fuel flow to the engine is
stopped. The
STOP switch should be depressed until the
generator stops rotating.
1
2
3
CONTROL
PANEL
3.
START:
The START toggle switch is a double pole, single
throw switch. The switch serves two purposes: starting
the engine and defeating
of
bypassing the engine oil pres-
sure switch. The defeat function turns on the fuel sole-
noid, instrument power and alternator excitation.
While the PREHEAT switch is still depressed, depressing
the START switch engages the start solenoid.
Panel
power and the fuel solenoid will be activated. When the
engine begins to fire, the START switch should be
released. The PREHEAT switch should not be released
until the oil pressure reaches alarm stops.
NOTE:
When
the
engine
is
shut
down,
the
water
tempera-
ture
gauge and
the
oil pressure gauge will continue
to
register
the
last temperature and oil pressure
readings
displayed.
They will
return
to
zero
once electrical power
is
restored.
4.
EMERGENCY
STOP:
The EMERGENCY stop switch at
the rear
of
the control box is normally closed. When
depressed, it will open the
DC
circuit to the control panel
and shut the engine down. As the switch is not toggled it
can be used when performing maintenance.
REMOTE
PANEL
For remote operation
of
the generator system, the same three
switches are used. The PREHEAT and START switches are
connected in parallel with the gauge panel's switches and
serve the same functions as in the gauge panel. The
STOP
switch is in series with the gauge panel's STOP switch and
serves the same function.
0
0
~
STOP
@
~
RElEASE
STAHlER
START
MUST~
~PRESS
PRESS
2ND
FIRST
~-,
GENERATOR
0
0
0
REMOTE
PANEL
(OPTIONAL)
Engines
&
Generators
60