IS 6.1
- 21
GB
GB
5
2
1
3
4
6
Exhaustmanifold
3.5.2 COMPONENTS
Ifthe generatoris installed at aheight over1m (3,3ft)
above the waterline, a check valve (ref.2) must be
fitted after the seawater intake to prevent the water
circuit from emptying out when the engine is off. If
the circuit is empty, the water pump impeller may
be damaged during starting.
For the same reason, when starting the generator
for the first time, manually prime the intake pipe
leading from the valve to the pump.
- 1/2" direct seawater intake (ref.1).
- 1/2" ball cock (main system) (ref.3).
- 1/2" ball cock (system bleeding) (ref.4).
Serves to drain the cooling system of the generator
for general maintenance or for long periods of
inactivity.
- Water filter (inspectable) (ref.5).
It protects effectively the cooling circuit against intake
of mud, sand and seaweed.
The filter mesh must be the fine type, it is advisable
to use the type with 2-470
m (micron) pitch.
Different sizeswould notallow goodfilter efficiency.
- Antisiphon valve (ref.6): this valve brings the cooling
circuit to atmospheric pressure when the engine is off,
preventing the siphonage phenomenon.
It must be used when the base of the generator is
under the water line, and must be positioned at least
500mm (1.6ft) above sea level.
The drain pipe of the antisiphon valve must be
positioned under the valve thus preventing water
from accumulating in the pipe which must always
remain empty to allow air to pass through it when
the generator is switched off.
Itis advisable to run the drainpipe through the bilge,
as small amounts of water may flow from it during
normal operation.
Two holeshave been made inthe casingto connect
the antisiphonvalve (ref.6).
Anti-siphonvalve
Water / water
exchanger
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