Operation
0120−1/A1
Winterthur Gas & Diesel Ltd.
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Prepare the Fuel System for Operation
1. Prepare the Fuel System
1.1 Diesel Operation
1) See 0720−1, Fig. 2.
2) Set the three-way valve 4 in the suction line of the low pressure pump 7. This lets
diesel oil flow from the daily tank 3 to the pump and to the mixing unit 8.
3) Make sure that the shut-off valves upstream and downstream of the engine are
open.
4) Set the low pressure pumps 7 and the booster 10 to on.
5) Drain the daily tanks 2, 3 and the mixing unit 8.
6) Use the pressure regulating valve 5 to set the pressure in the fuel oil system.
Note: When the engine operates with diesel oil (and low fuel temperature) a
small over-pressure is sufficient. If a change-over to heavy fuel oil is
necessary, the setting of the usual pressure is recommended from the
start.
7) Use the pressure retaining valve 17 to set the fuel oil pressure at the fuel pump
return (see 0250−1 Operating Data Sheet, column Medium, row Fuel,
downstream of pressure retaining valve ).
1.2 Heavy Fuel Operation
1) See 0720−1, Fig. 1.
Note: The fuel system is not ready for operation until the heavy fuel upstream
of the fuel pumps is at the necessary temperature (see 0710−1
Viscosity-Temperature Diagram).
After a shut-down period of more than 24 hours heat the high pressure circuit on the
engine for a minimum of four to six hours. Do not try to start the engine on heavy fuel
before you heat the fuel.
2) Set to on the heating for the daily tank 2, mixing unit 8, end-heater 11 and fuel
filter 12.
3) Set to on the heating for the fuel system on the engine (fuel rail 10, HP fuel pipes
8 and the fuel leakage system (see 8019−1, Fig. 1).
4) Make sure that the steam pipes are tight. If leakages are found, repair them
before the first commissioning or after maintenance on the fuel system.
5) Set the three-way valve 4 in the suction line of low pressure feed pump 7 to let
heavy fuel flow from the daily tank 2 to the pump and to the mixing unit 8 (See
0720−1, Fig. 2.
6) Drain the settling tank 1, daily tank 2 and mixing unit 8.
7) Make sure that the shut-off valves upstream and downstream of the engine are
open.
8) Start the pumps 7 and 10.
9) Heat the heavy fuel. This is necessary to bring the heavy fuel to the necessary
viscosity (see 0270−1 Change-over from Diesel Oil to Heavy Fuel Oil).
10) Use the pressure regulating valve 5 to set the pressure in the fuel oil system.
11) Use the pressure retaining valve 17 to set the fuel pressure at the fuel pump
return (see 0250−1 Operating Data Sheet, column Medium, row Fuel
downstream of pressure retaining valve).
Prepare the Engine for Operation
2014
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