Parker AQUA DUO A455C-2800, Technical Manual

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c) If the system will not be operated within the next two months or longer, perform a long-term
storage operation.
29.
The freshwater flush cycle will last for approximately 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.
30.
Close the Inlet Sea Cock Valve. This is a safeguard for vessel installations.
31.
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.
4.2 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 must be adjusted
to decrease or increase accordingly to overcome the RO Membrane Element condition using the
manifold regulator valve located at front of system.
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 specificat ions.
Operating amperage and operating pressure will decrease if:
NOTE