Installation Instructions
22.3.11
Panda PMS 8.000 NE - 42 NE Manual.R05 - Kapitel/Chapter 5: Installation Instructions Seite/Page 71
get into the engine.
Thereby, the position of the generator and the water collector, as well as the arrangement of the coolant and exhaust
ducts plays the decisive role.
If the water collector is arranged in an unfavourable position, the coolant flowing back in the exhaust duct can rise so
high, that it reaches the exhaust stack. Since at least one discharge valve is always open when the engine is shut
off, the sea water has free access to the combustion chamber. By capillary action, this sea water then flows past the
cocks and even reaches the engine oil in that way. (In fact, a surprisingly high oil level is a first indication of an upco-
ming catastrophe.)
If an usual high oil level can be detected and/or the oil is of a greyish colour, the engine must not be used
anymore. This is a certain sign for coolant that got into the oil pan. If the engine isstarted under these con-
ditions, the water and the oil are mixed into an emulsion. The the oil will quickly become so viscous that one
will have to call it a paste. In this phase the fine oil ducts are blocked and a few moments later the machine
gets destroyed because of insufficient lubrication. Before this happens, an immediate oil should be made.
(Since the water can only reach the engine via the combustion chamber, it can be assumed that the com-
pression rings will start to corrode. These effects have to be discussed with an engine expert. It will cer-
tainly be reasonable to immediately inject plenty penetrating oil through the intake stack and to slowly turn
the engine with the starter motor.)
The coolant can reach the exhaust area via the exhaust duct as well as via the coolant feed.
5.6.3 Possible cause: Exhaust duct
If the cause is the exhaust duct itself, the following points are to be checked at the duct:
a) Position of the water collector is too high. The water reaches the exhaust duct.
b) Position of the water collector is too far away from the middle of the generator. The water reaches the exhaust
duct in tilted position.
c) The water collector is too small relating to the length of the exhaust duct.
5.6.4 Possible cause: Coolant duct
If the generator is not clearly installed 600 mm over the water line, the coolant feed must be equipped with a ’venting
valve’, which is at least lead out 600 mm over the water line. (This position must also be assured in every tilted posi-
tion. Therefore the venting valve should be located in the ships’ center line, so that it can not move in tilted position.)
a) Position of the venting valve is too low. The water flows into the exhaust area when the ship is tilted.
b) Position of the venting valve is too far from the ships’ center line. The water reaches the exhaust area when the
ship is tilted.
c) The venting valve does not work, because it jams or it is clotted. (The venting valves’ function needs to be chek-
ked regularly.)
As it consistently happens that funtioning risks are not realised during the laying of the exhaust duct, the following
explanations refer explicitly to the exhaust duct. Here, the location, the size and the position of the ’exhaust water
collector’ play a very decisive part:
5.6.5 Installation area of exhaust water collector
Concerning a water-cooled exhaust system, it must be regarded that - under no circumstances - coolant from the
exhaust duct can get into the exhaust elbow area at the engine. If this happens, the coolant can get into the combu-
stions chamber via an open discharge valve. This would lead to irreparable damage at the engine.
In addition to that, one has to reckon with possible tilted positions of sailing yachts, which makes the position of the
water collector even more important. In general one could say that:
