Installation Instructions
Seite 80 Panda PMS 8.000 NE - 42 NE Manual.R04 - Capture D: Installation Instructions
8.7.08
D.3.3 Quality of the Raw Water Sucking In Line
In order to keep the suction resistance in the line at a minimum, the raw water intake system (i.e.
sea cock, thru-hull fitting, inlet filter, etc.) must have an inner diameter of at least 1" (25 mm).
This applies also to installation components such as thru-hull fitting, sea cock, raw water filter etc.
The intake suction line should be kept as short as possible. Install the raw water inlet in close pro-
ximity to the genset.
After start-up the cooling water quantity must be measured (e.g. by catching at the
exhaust). The flow rate, as well as the necessary cross section of the cooling water pipe
see section E.3, “Technical Data Generator,” on page 83
D.3.4 Generator Installation above Waterline
The Panda is equipped with a direct drive water intake pump mounted directly 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.
By the installation of a check valve in the raw water inlet line, which is under the waterline, this
problem can be restricted.
The impeller pump will remain intact longer, if an electrical booster pump is installed, and is stron-
gly recommended in order to preserve the impeller pump.
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.
