Exhaust System - Mastervolt WHISPER 3,5 Installation Manual

INSTALLATION
2 INSTALLATION OF THROUGH HULL FITTING
It is good practice for yachts to use a hull inlet fitting
with an integrated strainer (water scoop). For
propulsion engines in motorboats the water scoop is
often mounted against the sailing direction to induce
more water intake for cooling.
This should not be done in the case of a
generating set! When sailing at higher
speeds, water will be forced into the inlet and
your generating set will overflow!
Fahrtrichtung
sailing direction
Einlass durch den Schiffsrumpf
FALSCH!
WRONG!
Fig 5.
On motorboats and on sailing boats the water scoop
for a generating set should be fitted with the opening
faced backwards to prevent water being forced in
during sailing. Use a sealant when mounting the skin
fitting.
3 WATER STRAINER
Use an appropriate water strainer with connections of
12.5 mm (1/2"). Install the water strainer in a well
accessible position, (refer to fig. 4-6) 5 cm above the
waterline.
4 SIPHON BREAKER (AIR VENT)
When the point of water injection is below the
waterline, then -when the engine is stopped -there is
a risk that the cooling water may enter the engine as
a result of siphoning. To avoid this happening, the
generating set is designed to accommodate a siphon
breaker (air vent). In the standard delivery the
connections are bypassed. Hose of 12.5 mm (1/2")
inner diameter should be used.
If the generating set cannot be mounted such that the
bottom of the generating set is placed above the
8
thru-vessel inlet
flow direction
Flie§richtung
waterline, an air vent must be installed. Extend the
water hose of the by-pass 600 mm above waterline
and install an air vent. Ideally, the air vent should be
mounted above the yacht keel center line (i.e. to
minimize the influence of swaying on the water
intake). The hose of the drain should go downwards.
Water must flow out freely and air has to flow in freely
as well. (refer to fig. 15).
Fast motorboats will lay deeper when sailing at large
speed and can cause pressure on the waterinlet. This
should be avoided to prevent fleeding the engine.
If the air vent is clogged the water hoses will
not be vented when the generating set has
stopped and water can be forced into the
engine. This leads to immediate engine
problems and eventually severe damage!
DAMAGE CAUSED BY THE INGRESS OF WATER
IN THE ENGINE IS
WARRANTEE
Check the air vent at regular intervals. Open, clean
and lubricate the valve as required (fig. 6).
Fig 6.
1.4.3

Exhaust system

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
considerably, so that a rubber exhaust hose can be used
and the level of noise is reduced as well.
October 2004 / WHISPER 3,5 / EN
NOT COVERED BY
are thereby reduced