Installation Instructions
Seite/Page 58 - Kaptitel/Chapter 5: Installation Instructions
4.5.16
The deeper the waterlock is located underneath the generator, the better the protection from entering water into the
combustion chamber.
The picture below shows that the distance between the critical point at the exhaust elbow and the maximum
permissible water level in the exhaust hose is stated with 600 mm. This distance should be understood as a
minimum distance.
5.7.3 The volume of the waterlock
The waterlock must be measured so large, that it can take the entire amount of water flowing back from the exhaust
hose. The amount of water depends on the hoses’ length (L) and its cross section. While the diesel engine is
running, cooling water is continuously injected into the exhaust system and is carted outside with the emissions by
the exhaust gas pressure. When the engine is turned off, the number of revolutions sinks quite fast. By doing so, the
point is reached where the exhaust gas pressure does not suffice anymore to cart the cooling water out. All cooling
water remaining in the hose at that point flows back into the waterlock. At the same time, the diesel engine itself
continues to cart cooling water through the cooling water pump, as long as it keeps on rotating.
The waterlock must necessarily be measured large enough that it can take the entire amount of cooling
water and, at the same time, does not exceed the prescribed vertical height of 600 mm up to the critical
point at the exhaust elbow.
Fig. 5.7.3.0-1: Volume of the waterlock
Fig. 5.7.3.0-2: Testing the cooling water level
If there are any doubts, a verification can easily be made
by temporarily using a clear-sighted hose (1) as exhaust
hose. In that way, the cooling water level can be checked
very easily.
5.7.3.1 Ideal position of the waterlock
Important Note!
The ideal position of the waterlock would be in center underneath the generator. Only in this position it is
assured that the water level cannot change drastically in tilted position by the waterlock moving out of the
1
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