PROCEDURE
1
Make a full time schedule for the change-over to obey the ECA rules.
2
Make sure that you have changed the cylinder oil to the applicable BN, refer to section
8.10 Change-over the diesel fuel - general
.
3
Set to ON the trace heating of the fuel pipes and fuel rail.
4
If the engine room is cold, after a minimum of one hour make sure to get correct heating.
5
Make sure that HFO cannot flow into the MDO system.
5.1
If also a MDO leakage tank is installed, move the 3-way valve in the pipe from the
outlet of the fuel leakage fuel pump and injection control to the HFO leakage tank.
5.2
If the fuel return of the pressure control valve goes into the MDO service tank, set
the valve positions to have the fuel return go into the HFO service tank.
6
Close all covers on the rail unit.
7
Decrease the load of the engine to max. 75% CMCR. The decrease of the engine power
is related to the total quantity of fuel that flows in the system (for example the larger the
mixing tank, the less decrease in load is necessary).
8
Set the viscosimeter to 13 cSt to increase the temperature of the fuel.
NOTE:
The viscosimeter controls the end-heater, which keeps the fuel temperature at
the necessary viscosity.
9
Follow the instructions of the plant to slowly change-over the fuel supply from MDO to
HFO. Make sure that you increase the fuel temperature a maximum of 2°C each minute.
NOTE:
Sudden temperature changes can stop the movement of the fuel pump plungers.
10
If the temperature changes too much, wait until the fuel temperature is stable. Then you
can continue the procedure.
11
Do a check of the temperature, viscosity and pressure of the supplied fuel.
12
If the temperature, viscosity, or pressure is not correct, find the cause and repair the fault.
13
If you have to stop the engine, wait until the change-over procedure is fully completed.
NOTE:
This prevents problems during the subsequent engine start because of a mixture
of HFO and MDO in the system.
CLOSE UP
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None
X72-B
AA00-0000-00AAA-131H-A
Operation Manual
Change-over from MDO to HFO manually
Winterthur Gas & Diesel Ltd.
- 341 -
Issue 003 2021-12
