MAIN ENGINE D.O. TO H.F.O. CHANGING PROCEDUR

PREPARATION

1. IT IS TO BE CONFIRMED THAT FO SERVICE TANK, FO TEMP IS ABOUT 75⁰ C.
2. OPEN THE STEAM TRACING FOR M/E F.O.  LINES. 
3. M/E FO HEATER AND VISCOCITY CONTROLLER TO BE PREPARED FOR WORKING.

PROCEDURE.

1. M/E LOAD SHOULD BE AROUND 75% OF THE NORMAL OUTPUT (i.e. AROUND 64%).
2. OPEN VISCO CONTROLLER STEAM INLET VALVE  AND OUTLET VALVE .
3. M/E HEATER INLET AND OUTLET STEAM VALVE..
4. BY OPERATING THE VISCOCITY CONTROLLER MANUALLY IN THE ENGINE CONTROL ROOM, D.O. IN THE SYSTEM SOUL BE HEATED TO 60 – 80⁰C, GRADUALLY AT THE RATE 2⁰C PER MINUTE.
5. IT IS TO BE CONFIRMED THAT THE D.O. TEMP IN THE SYSTEM IS 60 – 80⁰C.
6. OPEN THE H.F.O VALVE , AND SHUT D.O. INLET VALVE .
7. AFTER THE HFO IN THE SYSTEM IS TO BE HEATED UP TO THE PREDETERMINED VISCOCITY 10 TO 14 Cst AT RATE 2⁰C PER Min. BY CONTROLLING VISCOCITY MANUALLY FROM THE E.C.R.
8. ONCE THE REQUIRED VISCOCITY OF HFO ATTAINED – 14 Cst, CHANGE THE VISCO CONTROLL TO AUTO MODE (VISCO MODE).