Instructions for heavy fuel Operation
Care and supervision / Engine fuel
A3.04.07.01
M20/M282/M332C/M452/M453C/M551/M552C/M601/M601C
en / 19.08.1996 BA000010 4/4
Ĺ
10. Final preheater HH1
The preheater is to lower the fuel viscosity to a level that is optimal for injection,
10 -12 mm
2
/s cSt; (1,8 - 2 °E), in order to reach a good atomization and fuel-air mixture.
• If the preheater is of the electrical type, ensure the temperature switch is set at min. 180 °C.
If the preheater is of the steam type, a condensation trap should be installed at the steam
outlet to ensure sufficient heating is possible.
Attention:
Fuel temperature before engine intake ≤ 150 °C.
11. Fine filter HF1
The fine filter protects the fuel injection system and removes solids not previously separated.
It is important to clean the filter when 50 % of the red area on the differential pressure gauge
is visible or when the filter alarm has been activated.
For service and maintenance instructions see page A5.05.07.
12. Viscosity measurement and control equipment HR2
Check whether the indicated viscosity is actually run: whenever taking on fuel, check the
temperatures and viscosity against the viscosity-temperature sheet (see operating media
A4.05.07.06) and adjust the viscosity control if necessary.
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