Vetus DEMPMP Instrucciones De Instalación página 4

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
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
insufficient mixing of coolant water with the exhaust
gasses.
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 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 qual-
ity.
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.
The complete VETUS range includes the following hose diam-
eters: 30 mm (1.2"), 40 mm (1.6"), 50 mm (2"), 60 mm (2.4"),
65 mm (2.6"), 75 mm (3"), 90 mm (3.5"), 100 mm (4"), 110 mm
(4.3"), 125 mm (4.9") and 150 mm (5.9"). A minimum hose
diameter must be used in relation to the engine power:
Engine power Hose
to: dia.:
10 kW (14 hp) 30 mm
18 kW (25 hp) 40 mm
23 kW (32 hp) 45 mm
29 kW (40 hp) 50 mm
40 kW (55 hp) 60 mm
50 kW (68 hp) 65 mm
4
030413.03
Engine power Hose
to: dia.:
65 kW (90 hp) 75 mm
95 kW (130 hp) 90 mm
118 kW (160 hp) 100 mm
142 kW (193 hp) 110 mm
184 kW (250 hp) 125 mm
265 kW (360 hp) 150 mm
WARNING
If water enters the engine from the exhaust silencer into
the exhaust system (for example: under sail when the ship
rolls or pitches heavily) this will lead to irreparable dam-
age to the engine.
Too much water in the silencer can effect engine starting;
drain off this water first. Too much water in the silencer
can be also caused by repeated starting attempts while
the engine refuses to start.
Installation
Installing silencer DEMPMP
The silencer can be fitted in front of, or after the goose neck.
Fitting after the goose neck gives less of a gurgling exhaust
sound.
During operation, the silencer contains water. This means that
the weight increases considerably and the silencer requires
additional support.
The silencers with a hose connector diameter between ø 40 and
ø 90 mm are fitted with two handles to secure them.
The silencers with a hose connector diameter of ø 100 mm can
be secured using the two Ty-rap®'s supplied.
N.B: There is no DEMPMP silencer available for 30 mm (1.2")
diameter exhaust systems.
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 downward over its whole length from the water injection
point to the exhaust silencer.
During operation, the exhaust pipe will contain water. This will
increase its weight considerably, so support the exhaust pipe
properly.
The exhaust pipe from silencer 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 exhaust
silencer.
- The length of the section between the exhaust silencer and
the highest point, should not exceed 300 cm (120").
Hose connections
To ease the fitting of the hose to the hose connector, use only
water and/or soap, NOT grease or products containing oil.
Fit each hose connection with 2 stainless steel 12 mm (0.5")
wide hose clamps.
Silencer DEMPMP