Installation Instructions
Seite/Page 56 Panda_5000i_PMS_eng.R01 - Kapitel/Chapter 5: Installation Instructions 9.12.10
5.4.2 Installation of the thru-vessel fitting in Yachts
Fig. 5.4.2-1: Thru-vessel fitting
It is good practice for yachts to use a hull inlet fitting with an
integrated strainer. The thru-vessel fitting (raw water intake)
is often mounted against the sailing direction to induce more
water intake for cooling.
For Panda generators, the thru-vessel inlet should NOT point
in the sailing direction! When sailing at higher speeds more
water will be forced into the inlet than what the pump can
handle and your generator will overflood!
5.4.3 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" (25mm).
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 proximity to the genset.
NoticeAfter start-up the cooling water quantity must be measu-
red (e.g. by catching at the exhaust). The flow rate, as
well as the necessary cross section of the cooling water
pipe take from Table 8.2-1, “Diameter of conduits,” on
page 105.
5.4.4 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 star-
ting, the pump runs dry for some seconds.
The seawater hose should form a loop as near as possible to the seawater 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 seawater and the
impeller life span will be increased.
By the installation of a check valve in the sea 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 strongly recommended
in order to preserve the impeller pump.
NoticeNever change the impeller for many years, without
exchanging the old pump sealing ring. If the sealing ring is
defective within the pump, seawater runs into the sound insu-
lated capsule of the generator. A repair is then very expen-
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