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Fast motorboats will lay deeper when sailing at large speed
(non- planing) and have additional pressure on the water inlet.
This should be avoided to prevent water from entering into the
engine.
Iftheairventisclogged,thewaterhoseswillnot
beventedwhenthegeneratingsethasstopped
andwatercanbeforcedintotheengine.This
leadstoimmediateengineproblemsandpossibly
severedamage!
DAMAGECAUSEDBYTHEINGRESSOFWATERINTHEENGINEIS
NOTCOVEREDBYGUARANTEE.
The siphon breaker that is delivered with the Whisper Power
siphon breaker installation kit does not require a connection for a
hose to drain the little water that could be spilled from the valve.
If you use another kind of siphon breaker that has a hose connec-
tion, make sure that the drain should go downwards directly and
that it may not end under water (refer to Figure 9).
OPEN
Fig.9: Wrong siphon breaker hose routing
(non-WhisperPower siphon breaker)
Water must flow out freely and air has to flow in freely as well.
Check the air vent at regular intervals. Open, clean and lubricate
the valve as required.
2.9 WET EXHAUST SYSTEM
2.9.1 General
Water is injected in the exhaust system of the generating set. In
this way the cooling water that has passed the heat exchanger is
mixed with the exhaust gases. Temperature and volume of the
gases are thereby reduced considerably, so that a rubber exhaust
hose can be used and the level of noise is reduced as well.
2.9.2 Standardexhaustsystem
The generating set exhaust system must remain completely
independent and separate from the exhaust system of any other
engine on board. A water lock prevents the generating set from
being flooded by cooling water and should be installed as close
to the generating set as possible. The lock must be large enough
to hold the entire water volume held in the hose from the top
of the goose neck to the water lock. The water lock must be
installed at the lowest point of the exhaust system (see Figure 10,
ref. 1).
The exhaust hose must have an inner diameter of 40 mm (11/2").
The exhaust system must be installed so that the back pressure
Piccolo 6 Marine Diesel Genverter
inside the exhaust does not exceed 0,07 bar (1psi – 70 cm water
column) and total length from the generator to the top of the
goose neck or water/separator does not exceed 3 m (10 ft.).
The exhaust hose descends from the capsule to the water lock.
Then the hose rises via the "goose neck" to the through-hull
exhaust outlet, situated minimum 50 mm above the water line
(Figure 10, ref 5). The "goose neck" must be vertical and situated
preferable along the ship's keel centre line. If the generating set
is mounted less than 600 mm (24") above the waterline, a "goose
neck" must be installed to prevent the engine from overflowing.
It is recommended to install an extra muffler (Figure 10, ref 2)
close to the through-hull fitting.
Fig.10: Standard exhaust system
1 E xhaust water lock;
2 Exhaust outlet muffler;
3 Exhaust line Ø 40 mm;
4 G oose neck;
2.9.3 Supersilentexhaustsystem
In order to reduce the noise level of the generating set to a min-
imum, an option to reduce the exhaust noise further (especially
exhaust water splashing) is an exhaust/water separator. The
exhaust/water separator allows the cooling water to be eject-
ed through a line (Figure 11, ref. A) separate from the exhaust
fumes and also functions as a goose neck to prevent water from
flooding the engine. If the exhaust/water separator is mounted
more than 60 cm above the water level an additional goose neck
is not required.
If the through-hull exhaust outlet has to be mounted far from the
generating set (i.e. the length of the exhaust piping from the gen-
erator to the top of the goose neck (water separator) exceeds 3
m; see Figure 14), an exhaust/water separator must definitely be
installed. The sea water from the separator must then run down
Stage V certified / EPA / Tier 4
Becauseofthesmallgasflowofthesmallengine,
itisveryimportanttokeepstrictlytotheinstruc-
tionsabove.Somemufflersandwaterlockscause
toohighbackpressure.Youareadvisedtousea
WhisperPowerinstallationkitorchecktheback
pressure.Toohighbackpressurecausesthe
systemtofillupwithwaterthataffectstheoutlet
valveandvalveseat.
5 T hrough-hull exhaust
outlet Ø 40 mm;
6 W ater level.
9
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