Raw Water Cooling - Westerbeke 8.0KW BCDT60Hz Owner's Manual

INSTALLATION
RAW WATER COOLING SYSTEM
Siphon-Break
For installations where the water-injected exhaust elbow is close to
or below the vessel's waterline, provisions must be made to install
a siphon-break in the raw water supply hose to the exhaust elbow.
The siphon-break provides an air vent in the raw water cooling
system to prevent raw water from filling the exhaust system and
the engine's cylinder when the engine is shut down.
A
CAUTION:
Failure to use
a
siphon-break when the
exhaust elbow is located at
or
below the load waterline
will result in raw water damage to the engine and
pOSSible flooding of the boat.
If you have any doubt about the position of the water-injected
exhaust elbow relative to the vessel's waterline under any of the
vessel's various operating conditions or when the vessel is not
under way, install a siphon-break. This precaution is necessary to
protect your engine.
The siphon-break must be installed in the high point of a hose
that is looped a minimum of20 inches (51cm) above the vessel's
waterline. This siphon-break must always be above the
waterline during all angles of vessel operation to prevent,
siphohing. Use a separate hose for this loop, and rim it outside of
the sourtdshield.
I -
1
SIPHON BREAK
SIPHON BREAK
AV/,IILABLE FROM YOUR
WESTERBEKE DEALER
I
SIPHON BREAK
DIAGRAM (TYPICAL)
NOTE: A
siphon-break requires periodic' inspection and cleaning
to ensure proper operation. Failure to properly maintain a
siphon-break can result
in
severe engine damage. Consult the
siphon-break manufacturer for a proper maintenance schedule.
Raw Water Intake
A flush-type through-hull fitting is recommended for the raw
water intake. It should be located on the boat's hull where it will
be below the waterline during all angles of the boat's operation.
See Westerbeke's INSTALLATION MANUAL for MARINE
ENGINES and GENERATORS for complete
installation guidelines.
A
WARNING:
Do not use
a
scoop-type through-hull
fitting for supplying raw water to this generator. A
scoop-type raw water inlet can develop substantial pres-
sure and force water past the raw water pump, flooding
the exhaust system and allowing the water to enter the
engine's cylinder. Damage caused by raw water entry
into the engine's cylinder via the exhaust system is not
covered by Westerbeke's warranty.
Flooding of the exhaust system due to water pressure can also
occur with a flush-type raw water intake on a powerboat that has
its bow up. This pressure can be caused by the boat's decreased
waterline before the boat reaches its final trim, or by the angle of
the boat to the sea surface when it is underway.
STARTING BATTERY CONNECTIONS
The Westerbeke 18.0 KW Generator is negative grounded. The
generator should be connected to its own 12V starting battery
(125A minimum).
All ground wires should be tightly fastened to the ground bolt
located on the lower left side of the engine below the starter
motor. Make certain the ground terminals are clean.
GROUND BOLT
Engines & Generators
8