INSTALLATION
M-GV/2, M-GV/3, M-GV/3+, M-GV 8, M-GV 10 and M-GV 15 — June 2017 — EN
9
directly and that it may not end under water (refer to
Figure 12).
Figure 12: 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
Standard exhaust system
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
(1
5
/
8
”). The exhaust system must be installed so that the back
pressure 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 13, 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 close to the through-hull fitting.
Because of the small gas flow of the small engine,
it is very important to keep strictly to the
instructions above. Some mufflers and water locks
cause too high back pressure. You are advised to
use a WhisperPower installation kit or check the
back pressure. Too high back pressure causes the
system to fill up with water that affects the outlet
valve and valve seat.
Figure 13: Standard exhaust system
1 Exhaust water lock;
2 Exhaust outlet muffler;
3 Exhaust line Ø 40 mm (1
5
/
8
”);
4 Goose neck;
5 Through-hull exhaust outlet Ø 40 mm (1
5
/
8
”);
6 Water level.
