4
030419.03
Waterlock NLPH
2
Installation
2.1 Installing waterlock NLPH
Instal the waterlock as horizontal as possible.
The waterlock ‘IN’-connection must always remain below the level of the
exhaust injection bend! Position the waterlock
‘back-to-front’
alongside
the engine when there is insufficient space behind the engine.
2.2 Hose connections
In order to achieve the ideal connection between the hoses and the water-
lock, both hose connections turn through 360 degrees.
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 2 halves of the housing can also be turned relative to each other.
For a proper working it is essential that the OUT half of the housing and
the inner part placed within this are in the relative positions as shown in
the illustration. A deviation of maximum 30˚ to either side is permitted.
The IN half of the housing may be placed in any position.
n
ote
Make sure that IN and OUT are not interchanged with each other
while fitting!
1
Introduction
The Vetus exhaust system components are especially suitable
for use in
water-injected
exhaust systems.
The maximum continuous operating temperature of the plas-
tic components of the exhaust systems is 70 degrees C (158
degrees F).
• Fit a temperature alarm to warn of excessively hot ex-
haust 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 tem-
peratures in the exhaust system.
• Excess temperature can also be the consequence of in-
sufficient mixing of coolant water with the exhaust gas-
ses.
In general, good mixing is obtained by a virtually verti-
cally installed exhaust injection bend.
Poor mixing can also occur with an engine on tick-over;
especially when the coolant water injection bend is in-
stalled virtually horizontally.
If necessary, take action. For example; by fitting a water
vortex 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
temperatures (100 degrees C, 212 degrees F) and oil. Easy flex-
ibility is essential for installation, while the hose must not col-
lapse when heated.
Vetus exhaust hose fulfils all the above requirements.
W
arning
If water enters the engine from the waterlock into the ex-
haust 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
030427.03
max. 2 x 30°
360°
IN
OUT
max. 2 x 30°
360°
IN
OUT
NLPH40
NLPH45
NLPH50
NLPH60
NLPH75
NLPH90
