Installation Instructions
Seite/Page 52 - Kaptitel/Chapter 7: Installation Instructions
14.7.16
as well as the necessary cross section of the cooling water pipe see section 9.7, “Diameter of conduits,” on
page 117
7.4.4 Generator installation above waterline
The Panda is equipped with a water intake pump mounted on the motor. Since the intake pump is an impeller pump
there are wearing parts which are likely to require replacement after a period of time. Ensure that the genset is
installed so that the intake pump can be easily accessed. If this is not possible, an external intake pump could be
installed in an easily accessible location
If the generator is installed above the waterline, it is possible that the impeller will wear out faster, because after
starting, the pump runs dry for some seconds. The raw water hose should form a loop as near as possible to the raw
water inlet of the generator (see picture below). This ensures the pump only sucks in air for a short time. The
impeller pump will be lubricated by raw water and the impeller life span will be increased.With the installation of a
non return valve in the raw water inlet line, which is under the waterline, this problem can be restricted.
When starting the generator you should always consider when raw water runs out of the exhaust system. If this
takes longer than 5 seconds you should replace the impeller pump because it sucks in air for too long before it
delivers raw water. The impeller has lost its effect and cannot suck in raw water anymore. This results to an
overheating of the motor. If the impeller is not exchanged early enough the impeller blades may break into pieces
and plugging the cooling water cycle. It is very important to exchange the impeller after a couple of months.
NOTE:
If the raw water line is too long for the impeller pump or the
generator installed too high above the water line a electrical
pump can be installed into the raw water line. In this case the
impeller should be removed out of the impeller pump.
Contact Fischer Panda for further information.
NOTE:
Never change the impeller for many years, without
exchanging the old pump. If the sealing ring is defective
within the pump, raw water runs into the sound cover of
the genset. A repair is then very expensive.
Replacement impeller and also a spare pump should always
be on board. The old pump can be sent back to Fischer
Panda for cost-effective repair.
7.4.5 Generator installation below waterline
Fig. 7.4.5-1: Vent valve
If the generator cannot be attached at least 600 mm
above the waterline, a vent valve must be installed at the
raw water line.
Possible heeling must be taken into consideration if installed
at the "mid-ship line"! The water hose for the external vent
valve is located at the back of the sound insulated capsule.
This hose is split in the middle and extended respectively at
each end by an additional hose and a connecting nipple.
Both hose ends must be led outside of the sound cover, if
possible 600 mm over the waterline in the mid-ship line. The
valve is connected at the highest place to the two hose ends.
If the valve jams the cool water line cannot be de-aerated
after stopping the generator, the water column is not
discontinued and water can penetrate into the combustion
chamber of the engine. This will lead to damage the engine in
a short term!
