Vetus LGS Instructions D'installation page 4

1 Introduction
The Vetus exhaust system components are only suitable for use in
water-injected exhaust systems.
The maximal continuous operating temperature of the exhaust gas /
cooling water separator type LGS is 70° C.
• Install a temperature alarm to signal the fact that the tempera-
ture of the exhaust system is too high.
• If the quantity of water injected is reduced with a view to
reducing the back pressure in the exhaust system, check to
ensure that sufficient water is also injected while the motor
is running at a standstill. This will prevent the exhaust system
from overheating.
If the mixing of the cooling water with the exhaust gasses is
not optimal, this may result in the overheating of the exhaust
system.
This will occur if the motor is running at a idle speed, particu-
larly in those cases in which the cooling water injection bend
mounted on the motor is virtually horizontal.
If necessary, take the necessary measures to improve the mix-
ing of the cooling water with the exhaust gasses.
Ensure that hose of a suitable quality is used as an outlet pipe for
water-injected exhaust systems.
The hose must be reinforced and able to withstand exhaust gasses,
high temperatures (100° C, 212°F) and oil residue. The hose must be
suitably flexible for processing yet it must not collapse when heated.
Vetus exhaust hose meets all of the necessary requirements.
The hose connection parts of the exhaust gas / cooling water separa-
tor LGS may be 40, 45, 50, 60, 75 or 90 mm in diameter.
Different diameters can be used on the inlet and outlet side without
any problem.
However, the following guidelines should be respected :
Engine power to:
18 kW (25 hp)
23 kW (32 hp)
29 kW (40 hp)
40 kW (55 hp)
65 kW (90 hp)
93 kW (125 hp)
The valve in the cooling water drainage pipe must be closed
while the motor is at a standstill.
When sailing with the motor at a standstill (when using only the
sails), water from outside can be forced into the exhaust gas /
cooling water separator if the valve in the cooling water drain-
age pipe is left open.
If water from the exhaust gas / cooling water separator enters the
exhaust system of the motor via the outlet damper (for example
if the ship rolls or pitches wildly while sailing) this will inevitably
result in damage being caused to the motor
4
030411.02
Hose dia.
40 mm
45 mm
50 mm
60 mm
75 mm
90 mm
W
arning
2 Installation
2.1 Installing the exhaust gas / cooling water separator
As far as possible the exhaust gas / cooling water separator should be
installed vertically and above the water line.
When correctly installed the exhaust gas / cooling water separator
replaces the goose-neck. The highest point of the exhaust gas / cool-
ing water separator must be at least 45 cm (16") above the water line.
In the case of a sailing boat, the exhaust gas / cooling water sepa-
rator also needs to be installed as close to midship as possible. This
ensures that if the boat is sailing at an angle, the highest point of the
exhaust gas / cooling water separator is not dramatically less than
the required 45 cm (16") above the water line.
The exhaust gas / cooling water separator contains water while in op-
eration. this means that the weight of the exhaust gas / cooling water
separator increases, thus the exhaust gas / cooling water separator
should be installed against a level and sufficiently solid partition us-
ing the assembly belt (LGS 40, 45, 50, 90) c.q. ty-raps® (LGS 60, 75)
provided (drawing 1).
2.2 Exhaust tubing
In order to assure that the remaining cooling water in the exhaust
tubing drains out properly, the exhaust tubing should be installed
from the exhaust to the transom exhaust connection along the full
length of the fall.
The exhaust hose also contains water while in operation. This causes
the weight of the exhaust hose to increase considerably. Thus take
care to ensure that the exhaust hose is well supported.
2.3 Connections to the exhaust hose
In order to assure that the exhaust hoses can be optimally connected
to the exhaust gas / cooling water separator, both hose connections
can be rotated through 360°. Both hose connections can function as
'IN' or 'OUT'!
Unscrew the hose clamps before turning the hose connections
(drawing 2)!
Re-tighten the hose connections with a tightening torque of,
LGS 40, 45, 50 : 5 ­ 6 Nm (3.7 ­ 4.4 ft.lb)
LGS 60, 75, 90 : 0.4 Nm (0.3 ft.lb)
Only use water and/or soap to make it easier to attach the hose to the
hose connections. Do not use any products containing grease or oil.
Assemble each of the hose connections with 2 stainless steel 12-mm
hose clamps.
2.4 Water drainage pipe
A skin fitting with a valve and a hose pillar must be installed to drain
off the cooling water.
LGS 40, 45, 50 : G 1 1/2"
LGS 60, 75 : G 2"
LGS 90 : G 3"
When choosing the point for the skin fitting, the following should be
taken into account :
- The outflow of the cooling water must not be obstructed,
Exhaust gas / cooling water separator LGS