Installation manual

SAFETY SHUTDOWN SWITCHES
SAFETY SHUTDOWN SWITCHES
1i'he engine is protected by three automatic shutdown
switches. Should a shutdown occur, do not attempt to restart
without finding
and correcting the cause. Refer to the head-
ing Engine starts, runs and then shuts down in the ENGINE
tROUBLESHOOTING section of this manual.
']'he following is a description of these automatic shutdown
switches:
High Water Temperature Switch
A high water temperature switch is located at the thermostat
housing. Nonnally closed, this switch, should the fresh water
cbolant's operating temperature reach approximately
210
0
P
(99°C),
will open and inten'Upt the DC voltage thereby
shutting off the engine. This switch resets at
195"F (IOrC}.
WATER
tI'EMPERATURE
'SWITCH \_->"'-
Low Oil Pressure Switch
A low oil pressure shutdown switch is located off the
e;ngine's oil gallery. Normally open in a static state, this
switch's sensor monitors the engine's oil pressure. Should the
engine's oil pressure fall to 5-10 psi, this switch will open
interrupting the
DC voltage thereby shutting off the engine.
OIL PRESSURE
SWITCH
OIL PRESSURE SWITCH
WIRED FOR OPTIONAL
AUDIBLE ALARM
High Exhaust Temperature Switch
An exhaust temperature switch is located on the exhaust
elbow. Nonnally closed,
tins switch will open and interrupt
the
DC voltage (shutting off the engine) should the switch's
sensor indicate an excessive exhaust temperature (an inade-
quate supply
of raw water causes high exhaust temperatures).
This switch opens
at 260-270oP (127-132°C). This switch
resets at approximately
225°P (107°C).
/
~'~-....."'.......-
/-:"............ EXHAUST ELBOW
'/ .
EXHAUST
TEMPERATURE
SWITCH
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
insllument 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. If this should occur, check
and repair the source
of the problem. After repairing the
fault, reset the breaker and restart the generator.
High RPM Shutdown Switch
(Optional Electronic Governing)
An overspeed switch in the DC circuit shuts off the generators
engine when the engine's speed reaches 2175 rpm (approx.) by
opening the DC circuit to the K2 relay. After correcting the
problem, this switch can be re-set by momentarily depressing the
stop switch. refer to the
WIRING DIAGRAMS in this manual.
Engines & Generators
10