OPERATION
EN / W-SC3 Mobile / January 2011
17
Starting the generator:
By pushing the start button briefly the electric system
is activated, the fuel lift pump starts pumping and the
starting procedure will begin. (By pushing the stop
button the system is deactivated)
The W-SC3 can even be started with an almost
discharged battery using the cylinder compression release
handle. The engine can then be rotated easily ("turned
over") as the valves are opened i.e. in the decompression
position.
You can also use the decompression handle to readjust
the valve clearance and to fill the cooling system with anti
freeze for conservation in winter time.
A restart protection prevents starting the engine when it is
already running, which could cause damage.
Checks once the generator is in operation:
1
Check for abnormal noise or vibration.
2
Check the voltage.
3 Power source selector switch (off/shore
power/generator power). Switch to power source
generator. If a MASTERSWITCH is installed, this
operates automatically.
Before loading the generating set up to maximum,
have it run warm. The first 50 hours of running the
continuous load should be restricted to 70 % of maxi-
mum load. Running for long periods at no load or light
load in the first 50 hours can cause cylinder glazing
and high oil consumption.
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 expectance,
the nominal electrical demand on the system should be
about 80% or the rated generating set’s maximum load.
Please note this when switching on your electrical devices!
Nevertheless, the W-SC3 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. 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 temp" 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.).
Figure 10: Decompression handle
