NVIC 17-14 Task 4.3.P

Operate main and auxiliary machinery and associated control systems

OICEW-A4.3 Preparation, operation, fault detection and necessary measures to prevent damage for the following machinery items and control systems

Auxiliary prime movers and associated systems

On a steam vessel of at least 1,000 HP, on a simulator, or in a laboratory,

the candidate plans for and starts up the freshwater distiller, describing actions as they are being performed.

The candidate:

1. Opens the brine pump overboard discharge valve;

2. Verifies that the brine pump overboard skin valve is open;

3. Verifies that the sea suction valve to the distiller saltwater feed pump is open;

4. Opens the saltwater feed pump suction and discharge valves;

5. Starts the saltwater feed pump to freshwater distilling unit;

6. Starts the brine overboard pump;

7. Adjusts the brine overboard discharge valve to maintain brine level to just cover the slosh plates in bottom of the flash chambers;

8. Opens the steam root valve to the distiller unit steam air ejectors;

9. Opens the steam supply valve to the saltwater feed heater (not if the saltwater feed water heater shell vacuum is less than 75% of normal operational vacuum);

10. Lines up and opens the L.P. bleed steam to saltwater feed water heater (or applies and regulates de-superheater condensate flow if live steam supply provided to salt water heater);

11. Lines up and regulates saltwater feed heater L.P. drain to maintain half of a gauge glass in saltwater feed heater hot well;

12. Adjusts the saltwater flow from the saltwater feed heater to maintain proper temperature of feed water to first stage;

13. Observes spray pattern of the feed water and level of water at bottom of the flash chamber;

14. Energizes the salinity indicating panel and verifies the three- way dump valve is tripped and will discharge to the bilge;

15. Monitors each salinity in the distillate path for indications of abnormal conditions;

16. Starts the distillate pump when the static suction line gauge glass is at least half-full;

17. Adjusts as necessary the saltwater feed temperature, brine overboard flow rate, and monitors the distillate pump output salinity level;

18. Verifies the tank to be replenished is lined up;

19. Engages the three-way dump valve when the distillate salinity level is indicated to be at or below alarm level;

20. Verifies the salinity meter reading by chemical test comparison of the distillate sample;

21. Records the water meter reading once discharge to the tanks has been established; and

22. Takes proper action to prevent safety and pollution violations.