INSTALLATION
EN / WHISPER 3.5 / October 2009 / Copyright © 2009 Mastervolt
9
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 are thereby reduced
considerably, so that a rubber exhaust hose can be used
and the level of noise is reduced as well.
1
STANDARD EXHAUST SYSTEM INSTALLATION
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 (ref. to
figure 9, ref. 1). The exhaust hose must have an inner
diameter of 40 mm no less, no more-. The exhaust system
must be installed so that the back pressure inside the
exhaust does not exceed 0,8 psi 60 cm. waterpressure
(refer to paragraph 5.4.3 of the users manual) and total
length up to the outlet or water separator does not exceed
2,5 m. The exhaust hose descends from the capsule to the
water lock. Then the hose rises maximum lift 120 cm via
the "goose neck" to the through-hull exhaust outlet,
situated minimum 50 mm above the water line (refer to
figure 9, ref. 5). The "goose neck" must be vertical and
situated preferable along the ship’s keel center line. It is
recommended to install an extra muffler (see figure 9, ref.
2) 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 Mastervolt
installation kit or check the back pressure
(refer to paragraph 5.4.3 of the users manual).
Too high back pressure causes the system to
fill up with water that affects the outlet valve
and valve seat.
Figure 9: Standard exhaust system
3
3
4
2
5
6
A
M
inimu
m
60
c
m
(2
4")
Maximum
120cm
(48")
5 c
m
(2")
B
1
Max. length A - B = 2.5m (8 ft.)
1 Exhaust water lock;
4 Goose neck;
2 Exhaust outlet muffler;
5 Through-hull exhaust outlet Ø 40 mm;
3 Exhaust line Ø 40 mm;
6 Water level.
