Vetus NLP40 Manuel D'installation page 4

1 Introduction
The VETUS exhaust system components are especially suitable for
use in water-injected exhaust systems.
The maximum temperature when in continuous use depends on the
material used to construct the waterlock.
The material used can be recognised by its colour.
Colour
Type
Gray
NLPxx(S)
Black
NLPxx(S)HD
White
NLPxx(S)WHD
- Fit a temperature alarm to warn of excessively hot exhaust
system temperature.
- If the quantity of injected coolant water is reduced to in
order to lower back-pressure in the exhaust system, check
that there is still sufficient water injected when the engine
is ticking-over. This will prevent excess temperatures in the
exhaust system.
- Excess temperature can also be the consequence of insuffi-
cient mixing of coolant water with the exhaust gasses.
In general, good mixing is obtained by a virtually vertically
installed exhaust injection bend.
Poor mixing can also occur with an engine on tick-over; es-
pecially when the coolant water injection bend is installed
virtually horizontally.
If necessary, take action. For example; by fitting a water vor-
tex or a water splitter in the exhaust pipe, to improve the
mixing of coolant water with the exhaust gasses.
With water-injected exhaust systems, fit a hose of suitable quality.
This hose must be reinforced, resistant to exhaust gasses, high tem-
peratures (100 degrees C, 212 degrees F) and oil. Easy flexibility is
essential for installation, while the hose must not collapse when
heated.
VETUS exhaust hose fulfils all the above requirements.
Hose dia.:
NLP40 ø 40 mm (1 9/16")
NLP45 ø 45 mm (1 3/4")
NLP50 ø 50 mm (2")
NLP60 ø 60 mm (2 3/8")
NLP65 ø 65 mm (2 9/16")
NLP75 ø 75 mm (3")
NLP90 ø 90 mm (3
* Based on an allowed back pressure of 0.1 bar.
4
030419.04
maximum continuous operat-
ing temperature
70˚C (158˚F)
250˚C (482˚F)
Engine power to
16 kW (22 hp)
21 kW (28 hp)
25 kW (34 hp)
36 kW (49 hp)
42 kW (57 hp)
56 kW (77 hp)
1 / ") 81 kW (110 hp)
2
If water enters the engine from the waterlock into the exhaust
system (for example: under sail when the ship rolls or pitches
heavily) this will lead to irreparable damage to the engine.
Too much water in the waterlock can effect engine starting;
drain off this water first. Too much water in the waterlock can
be also caused by repeated starting attempts while the engine
refuses to start.
2 Installation
2.1 Installing waterlock NLP
Instal the waterlock as vertical as possible.
Position the waterlock 'back-to-front' alongside the engine when
there is insufficient space behind the engine.
Because the waterlock contains water during use, the weight incre-
ases significantly. The waterlock must therefore be mounted on the
deck or a wall, as is indicated in the drawings.
Make sure the following conditions are met under all sailing
conditions (e.g. heeling):
• The waterlock 'IN'-connection is located below the level of
the exhaust injection bend.
• the distance between the bottom of the engine's cooling wa-
ter outlet and the highest point of the waterlock is at least 5
cm (2").
For additional exhaust system information see chapter 3.
*
:
W
arning
n
ote
Waterlock NLP