Installation - Vetus NLP3-Serie Einbauanleitung

1 Introduction
The Vetus exhaust system components are especially suitable for use
in water-injected exhaust systems.
The maximum continuous operating temperature of the plastic
components of the exhaust systems is 70 degrees C (158 degrees F).
- Fit a temperature alarm to warn of excessively hot exhaust
system temperature.
- If the quantity of injected coolant water is reduced to in or-
der to lower back-pressure in the exhaust system, check that
there is still sufficient water injected when the engine is tick-
ing-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; espe-
cially when the coolant water injection bend is installed virtu-
ally horizontally.
If necessary, take action. For example; by fitting a water vor-
tex or a water splitter in the exhaust pipe, to improve the mix-
ing 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.
Engine power to:
18 kW (24.5 hp)
22 kW (30 hp)
28 kW (38 hp)
39 kW (53 hp)
63 kW (86 hp)
89 kW (121 hp)
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.
4
030429.02
Hose dia.:
ø 40 mm (1 9/16")
ø 45 mm (1 3/4")
ø 51 mm (2")
ø 60 mm (2 3/8")
ø 76 mm (3")
ø 90 mm (3 1/2")
W
arning
2

Installation

2.1 Installing waterlock NLP3
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 increa-
ses significantly. So fit the waterlock with the ty-raps® supplied. The
waterlock has slots in which the ty-raps® should be fitted.
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.
2.2 Hose connections
In order to achieve the ideal connection between the hoses and the
waterlock, both hose connections turn through 360 degrees.
NLP340
NLP345
NLP360
NLP360
NLP375
NLP390
NLP36015L
NLP37515L
NLP39015L
Loosen the bolts before turning the hose connections! Tighten the
hose connections to a torque of 1 Nm (0.74 ft-lb, 142 oz-in).
The parts of the housing can also be rotated relative to each other.
n
ote
1 Nm
(0.1 kgm,
0.74 ft.lbf )
Waterlock NLP3