MTU 20 V 4000 M93 x Operating Instructions Manual page 63

Initial operation: HAT
1. Replace fuel filter on engine (→ Page 129).
Note: Determine the suction pressure upstream of the engine-mounted fuel delivery pump.
2. Install pressure gage in fuel supply line from Yard fuel system to engine.
3. Switch on fuel treatment system and operate it for some minutes (→ Page 65).
Result: The fuel is drawn from tank (24), cleaned by the water separator filter (15) and then routed via overflow
tank (14) back to tank (24). Water that collects in the tank is separated.
4. Start engine (→ Page 58).
5. Run engine at idling speed.
6. Check suction pressure (see technical data of the engine) at the engine-mounted fuel delivery pump.
Note: If the suction pressure is within the permissible limits and engine operation is satisfactory.
7. Increase engine speed to 1000 rpm and monitor suction pressure.
8. Check suction pressure at the engine-mounted fuel delivery pump.
Result: If the values are within the limits specified by the manufacturer, the system is ready to start filter re-
placement simulation with the engine running as part of the Harbor Acceptance Tests.
Simulation of filter replacement with the engine running: HAT
1. Switch on fuel treatment system (→ Page 65).
2. Start engine (→ Page 58).
3. Run engine at idling speed.
4. Close ball valve (5) at inlet to fuel treatment system.
Result: The pressure upstream of the fuel treatment system increases until the overflow valve at the pump unit
opens and fuel flows through bypass (3) and bypass (2).
5. Open ball valve (19) .
Result: Fuel emerges. If no fuel emerges:
• Open ball valve (5) at inlet to fuel treatment system.
• No function of bypasses (2) and (3); carry out functional test of bypasses (2) and (3) .
6. Check suction pressure (see technical data of the engine) at the fuel delivery pump.
Note: If the suction pressure is within the permissible limits and engine operation is satisfactory.
7. Increase engine speed to 1000 rpm and monitor suction pressure.
Result: If all engine operating values are within the specified limits, open ball valve (5) at inlet to fuel treatment
system.
Simulation of power failure (emergency): HAT
1. Switch on fuel treatment system (→ Page 65).
2. Start engine (→ Page 58).
3. Run engine at idling speed.
4. Switch off pump (21) at switchgear cabinet (20).
Result: The engine-mounted fuel delivery pump draws fuel via bypass (2) directly from tank (24).
5. Check suction pressure at the engine-mounted fuel delivery pump.
Note: If the suction pressure is within the permissible limits and engine operation is satisfactory.
6. Increase engine speed to 1000 rpm and monitor suction pressure.
Result: If the suction pressure is within the specified limits, simulation was successful.
MS150048/04E 2013-07 | Operation | 63