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The freshwater flush cycle will last for approximately 10 minutes. The 10-minute cycle is adjustable from 6
to 10 minutes. After the freshwater flush cycle is complete, the freshwater flush lamp will illuminate and
intermittently blink in the stand-by mode. Every 7 days, the freshwater flush rinse cycle will repeat
automatically.
If the "START/STOP" button is pressed twice, the automatic freshwater flush cycle will be cancelled, and the
freshwater flush lamp will not be illuminated.
22. Close the Inlet Sea Cock Valve. This is a safeguard for vessel installations.
23. If the freshwater flush is installed and activated, do not interrupt power. If the freshwater flush is not installed
or is not activated, turn off the electrical power source (circuit breaker) to the system. This eliminates the chance
of inadvertently starting the system. If the power source has been turned off, the freshwater flush will not cycle
every 7 days.
Pressure Changes
The system operating pressure (the pressure applied to the RO Membrane Element) varies with the feed water
temperature, the feed water salinity and the condition of the RO Membrane Element . The system design
specifications are based on feed water temperature of 77° F / 25° C and a feed water salinity of 35,000 PPM-TDS
(parts per million-total dissolved solids). Each RO Membrane Element can vary +/- 15%, which will cause the final
operating pressure to decrease or increase accordingly. However, assuming the "perfect RO Membrane," at this
temperature and salinity the system will operate at the standard system pressure listed within the specifications
at the beginning of this Owner's Manual.
If the feed water salinity increases or if the feed water temperature decreases, the system operating pressure will
increase. Inversely, if the feed water salinity decreases or if the feed water temperature increases, the system
operating pressure will decrease. Furthermore, if the RO Membrane Element is new or old and fouled, the system
operating pressure automatically decreases or increases accordingly to overcome the RO Membrane Element
condition.
Operating amperage and operating pressure will increase if:
1. The feed water temperature is lower than 77º F / 25º C.;
2. The feed water salinity is greater than 35,000 PPM TDS (3.5% Total Dissolved Solids);
3. The RO Membrane Element becomes fouled;
4. The RO Membrane Element is new and on the minus 15% side of the specific ations.
Operating amperage and operating pressure will decrease if:
1. The feed water temperature is higher than 77º F/ 25º C.;
2. The feed water salinity is less than 35,000 PPM TDS (3.5% Total Dissolved Solids);
3. The RO Membrane Element is new and on the plus 15% side of the specifications.
By monitoring feed water salinity, temperature and resulting system operating pressure, it is possible to measure
and monitor the fouling of the RO Membrane Element over time and use. As the feed water vane pump becomes
worn from normal use, it will lose flow and the ability to build up pressure. A reduction in product water production
could be caused by insufficient pressure and/or flow from the R.O Boost pump. If the R.O Boost pump becomes
worn resulting in reduced pressure and/or flow, it may be returned to Sea Recovery for rebuild or replacement.
Because of the specific matching requirements of the wear parts and tight tolerance, it is not practical to repair in
the field. Please refer to maintenance table.
Commissioning a New System
39
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