Initial operation
Putting into service/loading
A3.05.18.03
M20-M601C
en / 16.12.1997 BA000046 1/1
Ĺ
Loading during the warming up of a main engine
Precondition: The jacket water has been preheated to the temperature (t) given below when
running on:
Distillate fuel t = 40 °C
Heavy oil fuel t = 5 - 10 °C below working temperature at the engine
outlet. See A1.06.
Normal loading
If loading is not controlled by a programme, the load can be increased to 60 % within 1 min. and to
full load within 3 - 4 min.
Cold starting, below the above preheating temperature
MaK generally advises against cold starting because of the higher wear and the high thermal loads
on the parts forming the combustion chamber.
Only the following brief instructions are therefore given:
It is possible to start the cold engine on distillate fuel, however, this should only be done in
exceptional cases and the engine should be warmed up very carefully.
The conditions for starting the cold engine with heavy fuel are very restricted. A more viscous fuel
will make ignition more difficult, in addition to the above thermal influences. Incomplete
combustion, heavy deposits in the exhaust system and combustion chambers with heavy wear on
pistons and cylinder liners will be the consequences.
Attention:
A cold-starting attempt on heavy fuel can only be justified in an emergency!
The engine should always reach working temperature after every start, particularly in short test
runs. Running the engine for a short time only, will produce sulphurous acid, which will damage the
valves and exhaust ducts, in conjunction with other corrosive combustion residues.
With local control or manual monitoring of the engine, the indicators, such as pressure gauges,
thermometers and tachometers must be continuously watched. The local control station should
only be left, when the readings have approximately reached a steady state condition in the desired
power range.
If there is a barred speed range owing to torsional vibration, this should be passed as rapidly as
possible. See the plate on the engine and/or A1.09.
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