Operating instructions
SAFETY
SHUTDOWN
SWITCHES
SAFETY
SHUTDOWN
SWITCHES
The
engine
is
protected
by
a
variety
of
shutdown
switches.
Should
a
shutdown
occur.
do
not attempt
to
restart
withqut
finding and correcting the cause.
Refer
to
the
heading
Engine
slarts,
runs
and
then
shuts
down
in
the
ENGINE
TROUBLESHOOTING
section
of
this
manual.
The
following
is
a description of
these
automatic
shutdown
switches:
Exhaust
Temperature
Switch
An
exhaust
temperature
switch
is
located
on
the
exhaust
elbow.
Nonnally
closed,
this
switch
will
open
and
interrupt
the
DC
voltage
to
the
K2-run
relay
(shutting
off
the
engine)
should
the
switch's sensor
indicate
an
excessive
exhaust
tem-
perature
(an
inadequate
supply
of
raw
water
causes
high
exhaust
temperatures).
This
switch
opens
at
260-270"F
(127-
132°C).
This
switch
resets
at
approximately
225"F
(I07"C).
EXHAUST
TEMPERATURE
SWITCH
Waler
Temperature
Switch
EXHAUST
ELBOW
A
high
water
temperature
switch
is
located
at
the
thennostat
housing.
Nonnally
closed,
this
switch,
should
the
fresh
water
coolant's
operating
temperature
reach
approximately
210°F
(99°C),
will
open
and
interrupt
the
DC
voltage
to
the
K2
run
relay
therebyshutting off
the
engine.
This
switch
resets
at
195"F
(107"C).
WATER
(COOLANT)
TEMPERATURE
SWITCH
OIL
FILTER
ASSEMBLY
low
Oil
Pressure
Switch
Oil
PRESSURE
SWITCHES
Dual
low
oil
pressure
switches
are
located off
the
engine's
oil
gallery
manifold.
One
is
nonnally
open
when
the
engine
is
in
a
static
stale.
This
switch
functions
in
the
automatic
shutdown
circuit
when
the
unit
is
operating (5
psi
rating).
The
second
oil
pressure
switch
is
installed only
on
SEA
RAY
spec.
generators.
This
switch
is
nonnally closed
and
functions
in
their
low
oil
pressure
alarm
system (10
psi
rating).
Should
the
oil
pressure
drop
to
10
psi
while
the
generator
is
operating, the
SEA
RAY
spec.
switch
will
close
activating
their
low
oil
pressure
alarm.
Should
the
oil
pressure
drop
further
to
5
psi,
the
automatic
shutdown circuit
switch
will
open
interupting
DC
voltage
to
the
K2
run
relay
thereby
shutting off
the
generator.
High
RPM
Shutdown
Switch
An
overspeed
switch
in
the
DC
circuit shuts off
the
generators engine
by
interupting
DC
voltage
to
the
K2
run
relay
if
the
engine's
speed
runs
to
high.
After
correcting
the
problem,
this
switch
can
be
reset
by
momentarily
depressing
the
stop
switch.
Refer
to
the
WIRING
DIAGRAMS
in
this
manual.
OVERSPEED
CIRCUIT
BOARD
Engine
Circuit
Breaker
The
generator's
engine
is
protected by
an
engine
mounted
manual
reset
circuit
breaker
(20
amps
DC).
Excessive
current
draw
or electrical
overload
anywhere
in
the
instrument
panel
wiring
or
engine
wiring
will
cause
the
breaker
to
trip.
In
this
event
the
generator
will
shut
down
because
the
opened
breaker
interrupts
the
DC
circuit
to
the
K2-run
relay.
If
this
should
occur,
check
and
repair
the
source
of
the
problem.
After
repruring
the
fault.
reset
the
breaker
and
restart
the
generator.
Engines & Generators
10