Operation0270−1/A1
Winterthur Gas & Diesel Ltd.
2/ 2
4. Change-over from HFO to MDO
See 0720−1 Fuel Treatment and Fuel System, Fig. 1 Schematic Diagram − Fuel
System.
4.1 Plant Side
To change from HFO to MDO, you must first change the position of the automatic
change-over unit (16). HFO and MDO is mixed in the mixing unit (21). The viscosity of
the fuel mixture decreases quickly at a specified temperature, which is related to an
increased proportion of MDO to HFO. After a short period the heating can be set
to off.
4.2 Engine Side
CAUTION
Damage Hazard: If you operate the engine with marine diesel oil
and the electrical trace heating is set to on, damage to the engine
will occur. Set to off the electrical trace heating (see 4002−2 Local
Control Panel/Local Display Unit LDU−20, paragraph 3.10 User
Parameters and 8825−1 Electrical Trace Heating System).
The trace heating on the engine (fuel pressure pipes and fuel rail) must be set to off
during change-over from HFO to MDO in the plant.
Note: The time to complete a change-over will be longer if the engine operates
at low load.
Before you stop the engine, the change-over procedure must be completed. This will
prevent a mixture of MDO and HFO in the fuel rail which can cause viscosity
problems during the next engine start.
It is recommended that the CMCR load is less than 50% CMCR power for the
change-over from HFO to MDO.
Change-over from Diesel Oil to Heavy Fuel Oil and Back
2015-03
To Next Page
Loading...
