Man L23/30DF, Project Manual

Page: 271 / 392

General
The engine can be loaded according to the follow-
ing procedure:
A) Normal start without preheated cooling water.
Only on MDO. Continuous lubricating.
B) Normal start with preheated cooling water. On
MDO or HFO. Continuous lubricating.
C) Stand-by engine. Emergency start, with pre-
heated cooling water, continuous prelubricating. On
MDO or HFO.
Above curves indicates the absolute shortes time
and we advise that loading to 100% takes some
more minutes.
Starting on HFO
During shorter stops or if the engine is in a standby
position on HFO, the engine must be preheated
and HFO viscosity must be in the range 12-18 cSt.
If the engine normally runs on HFO, preheated fuel
must be circulated through the engine while pre-
heating, although the engine has run or has been
flushed on MDO for a short period.
Starting on MDO
For starting on MDO there are no restrictions
except for the lub. oil viscosity which may not be
higher than 1500 cSt (10°C SAE 40).
Initial ignition may be difficult if the engine and the
ambient temperature are lower than 5°C and the
cooling water temperature is lower than 15°C.
Prelubricating
Continuous prelubricating is standard. Intermittent
prelubricating is not allowed for stand-by engines.
If the prelubrication has been switch-off for more
than 20 minutes the start valve will be blocked.
MAN Diesel & Turbo
1655204-8.8
Page 1 (1)
Starting of engine
B 17 00 0
L27/38S, L16/24S, L21/31S, L16/24, L21/31, L27/38
2015.12.15