Safety Shutdown Switches - Westerbeke 8.0KW-60Hz Service Manual

SAFETY SHUTDOWN SWITCHES
SAFETY SHUTDOWN SWITCHES
The engine is protected by five automatic shutdown
switches. Should a shutdown occur, do not attempt
to
restart
witlwut
jinding
and
co"ecting the cause.
Refer to the
heading Engine stans, runs
and
then shuts down in the
ENGINE TROUBLESHOOTING section of this manual.
The following is a description of these automatic shutdown
switches:
High Exhaust Temperature Switch
An exhaust temperature switch is located on the exhaust
elbow. Normally closed, this 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
26O-27O"F (l27-132°C). This switch
resets
at
approximately 225"F. (\o7°C).
EXHAUST
low
Oil Pressure SwItch
A low oil pressure shutdown switch is located off the
engine's oil
gallery .
Nonnally 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.
ENGINE BLOCK
High Water Temperature Switch
A high water temperature switch is located at the thermostat
housing. Normally closed,
this
switch, should the fresh water
coolant's operating temperature reach approximately 2\o'F
(99°C), will open and interrupt the DC voltage thereby
shutting off the engine. This switch resets at 195'F (107°C).
20 AMP
.'."IIIT·"
BREAKER
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. If this should occur, check
and repair the source of the problem. After repairing the
faul~ reset the breaker and restart the generator.
~
WESTERBEKE
Engines
&
Generators
6