Vetus MGP Instructions D'installation page 4

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).
The MGP, MGS and MGL waterlocks are available with the following
intake connections: 45° upward angle (standard), 30° upward angle,
15° upward angle or horizontal (on request and with a minimum of
10 pieces).
- 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 insuf-
ficient 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;
especially when the coolant water injection bend is
installed 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 flexibility
is essential for installation, while the hose must not collapse when
heated.
Vetus exhaust hose fulfils all the above requirements.
IN
MGP9090 ø 90 mm (3.5") ø 90 mm (3.5")
MGP102102 ø 102 mm (4")
MGP102127 ø 102 mm (4")
MGP5455 ø 127 mm (5")
MGS5455A ø 127 mm (5")
MGS5456A ø 127 mm (5")
MGS6456A ø 152 mm (6")
MGL6458A ø 152 mm (6")
MGL8458A ø 203 mm (8")
MGL84510A ø 203 mm (8")
4
030431.01
Engine power
OUT
to:
77 kW (105 hp)
ø 102 mm (4") 100 kW (136 hp)
ø 127 mm (5") 127 kW (173 hp)
ø 127 mm (5") 155 kW (211 hp)
ø 127 mm (5") 155 kW (211 hp)
ø 152 mm (6") 188 kW (256 hp)
ø 152 mm (6") 222 kW (302 hp)
ø 203 mm (8") 308 kW (420 hp)
ø 203 mm (8") 396 kW (539 hp)
ø 254 mm (10") 508 kW (691 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.
2 Installation
2.1 Installing waterlock MGP, MGS, MGL
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. Fit the waterlock on a level surface and attach it
with M8 bolts and 3 flat washers.
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 Installing the transom exhaust connection
Fit the transom exhaust connection at such a position that with
the ship fully laden, the outlet is still at least 5 cm (2") above the
waterline.
2.3 Exhaust pipe
In order to ensure the proper drainage of the coolant water injected
into the exhaust pipe, the pipe must be installed with a slope down-
ward over its whole length from the water injection point to the
waterlock.
During operation, the exhaust pipe will contain water. This will
increase its weight considerably, so support the exhaust pipe prop-
erly.
The exhaust pipe from waterlock to transom connection must be
installed in such a way that:
- The highest point in the exhaust pipe should not be more than
150 cm (60") above the underside of the waterlock.
- The length of the section between the waterlock and the highest
point, should not exceed 300 cm (120").
W
arning
n
ote
vetus® Waterlock MGP, MGS, MGL