JFD WHE - 3, Руководство по эксплуатации и обслуживанию

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KI-OM-0591 Rev 3 19
Operations
The system should now be operating and all systems functioning correctly. Allow the outlet
temperature to rise to the set point and monitor the control of the process to confirm correct
heater bank selection and temperature output.
Note The supply inlet pressure should be maintained above 3 bar with a sufficient flow
rate to supply the unit with 45 lit/min. The positive displacement pump used
generates an output pressure equivalent to the differential pressure drop through
the hose or umbilical while maintaining a constant flow rate.
3.5 Shutdown Procedure
1 Turn off all electric heaters.
2 Push Pump Stop Button.
3 Turn off main power switch.
4 Shut sea water valve and open fresh water valve to flush the entire system with fresh
water for at least 15 to 20 minutes after each usage.This will flush out the heating
system, plumbing, valves, umbilical and most important, the breathing gas heat
exchanger and the hot water suit. If required, run the pump to ensure adequate flushing
of the system pipework with fresh water.
5 During the flushing process ensure that the entire system is flushed out by momentarily
opening the venting valve and both dump valves.
6 Shut the fresh water valve off. Open the drain valve and tank vent valve and allow the
water to drain from the system.
3.6 Drain System
To prevent damage due to freezing of the water in the system it is important to drain
all the water before storing the unit. In warmer climates draining the system may not
be necessary. However, flushing the unit remains necessary prior to storage,
especially to prevent corrosion of stainless steel components by stagnant seawater
(MIC or Microbiologically Induced Corrosion).