OPERATION
20
July 2009 / WHISPER 6/8/11 / US / Copyright © 2009 Mastervolt
Engine load during longer operation:
Please ensure that the generating set is not overloaded.
Overloading occurs when the electrical load (demand) is
so high that the generator cannot be turned around
properly by the diesel engine. Overloading causes the
engine to run rough, while using oil and excessive fuel and
producing soot by the exhaust. The engine can even stop.
The generator should therefore only be loaded at the
maximum rated power for short periods (2-3 hours) only!
The high peak current is meant for the ability to start
electrical devices that need a high current for starting
especially electric motors and compressors (from a still
stand state).
In order to prolong the generating set’s life expectancy, the
nominal electrical demand on the system should be about
70% or the rated generating set’s maximum load. Please
note this when switching on your electrical devices!
Nevertheless, the Whisper 6/8/11 is designed so as not to
overheat, even under extreme conditions.
Do not run the generator for very long periods at no load
or at very low load. When this is necessary do load the
generator at least one hour in 10 hours for minimum 70%.
Long term running at too low load will cause the exhaust to
be choked by carbon.
Never remove the battery while the engine is
running or any electrical cable while the
battery is connected in the circuit. Only
disconnect the battery with the engine
stopped and all switches in "OFF" position
Stopping the generating set:
1 Avoid stopping of the generator abruptly after a long
period of operation at high load! Doing so, you avoid
unnecessary thermal load to your generating set!
Act as follows:
Prior to switching off the generating set, decrease the
generator load (i.e. turn off most electrical users) and
let the generator run at low load for approx. 5 minutes
to allow the engine to get properly cool ( the influent
sea water must flow through the system in order to
cool the engine).
If the generator is operating in a hot environment and
you do not act as given above, the excessive heat in
the engine can trip the “high temperature" alarms. In
that case, a restart of the engine is not possible for
some time. It is also recommended to switch off
electrical users prior to stopping the generator
because of the voltage drop that occurs as the engine
comes to a halt. Such voltage drops may cause
damage to electric motors, compressors (in
refrigerators or air conditioners etc.).
2
Press the STOP button.
3
Close the inlet sea water cock.
4 Switch to an other 120/240V power source, if
available. If a Mass Systemswitch is installed, this is
done automatically.
